The theoretical yield of CO2 in moles when there is 63.2 moles of O2 present is 63.2 moles.
Describe Chemical Reaction?A chemical reaction is a process in which one or more substances, called reactants, are converted into one or more different substances, called products. This process involves the breaking and forming of chemical bonds between atoms and/or molecules, resulting in a change in the chemical composition of the substances involved.
Chemical reactions can be classified into several different types based on the changes that occur during the reaction, including:
Synthesis or combination reactions: where two or more reactants combine to form a single product.
Decomposition reactions: where a single reactant breaks down into two or more products.
Single replacement or displacement reactions: where one element replaces another element in a compound, resulting in the formation of a new compound.
Double replacement or displacement reactions: where two compounds exchange ions or atoms to form two new compounds.
Acid-base reactions: where an acid and a base react to form a salt and water.
Assuming that the balanced chemical equation is:
C + O2 → CO2
We can see that the stoichiometric ratio between O2 and CO2 is 1:1. This means that for every 1 mole of O2 consumed, 1 mole of CO2 is produced. Therefore, if there are 63.2 moles of O2 present, the theoretical yield of CO2 would also be 63.2 moles.
So, the theoretical yield of CO2 in moles when there is 63.2 moles of O2 present is 63.2 moles.
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if some of the bubbles of butane did not enter the cylinder and escaped into the air instead, in what way would the calculated molecular weight of butane be affected?
The calculated molecular weight of butane would not be affected if some of the bubbles escaped into the air instead of entering the cylinder.
The molecular weight of a substance is a fundamental property of the substance and is determined by the number and type of atoms in its molecular structure. It is independent of the amount or physical state of the substance. Thus, if some of the bubbles of butane escape into the air, the molecular weight of the remaining butane in the cylinder remains unchanged. The effect of this escape would only be seen in the measured volume or mass of the butane in the cylinder, which would be lower than the expected value if all the butane had been captured.
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g histidine is an important amino acid with an aromatic side chain that contains two nitrogens. which nitrogen do you think would get protonated in acid
Histidine is an important amino acid with an aromatic side chain that contains two nitrogens. The nitrogen in position 1 is more likely to get protonated in acid.
Under acidic circumstances, histidine's imidazole side chain can behave as a weak base and take up a proton (H+). The pKa values of the two nitrogens in the imidazole ring differ, determining which nitrogen is more likely to be protonated.
The nitrogen that is more likely to be protonated in acid is the more basic nitrogen, which is the nitrogen that is less able to share its electron pair due to its ring location. In the case of histidine, the nitrogen situated at position 1 of the imidazole ring is more basic and hence more likely to be protonated in acid.
This is because nitrogen in position 1 has a lower pKa value (about 6) than nitrogen in position 3. (around 9). This indicates that the nitrogen in position 1 is more likely to take up a proton and get protonated in acidic circumstances, whereas the nitrogen in position 3 is less likely to do so.
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a current of 4.96 a is passed through a ni(no3)2 solution. how long, in hours, would this current have to be applied to plate out 7.10 g of nickel?
Faraday's law of electrolysis, which states that the quantity of substance created or consumed in an electrolytic cell is precisely proportionate to the quantity of electric charge carried through the cell, must be applied to this problem.
We use the formula: moles of substance = (electric charge / Faraday's constant), where C/mol is the charge per mole of electrons and F/mol is the Faraday constant. We must first determine how many moles of nickel were created by the specified current in order to determine the time needed to plate out 7.10 g of nickel: Electric charge is calculated as electric charge = current x time. Using the molar mass of nickel (58.69 g/mol), determine its mass: [(4.96 x t) / 96485] x 58.69] x [(moles of Ni x molar mass of Ni] = mass of Ni Calculate "t" by equating the mass of nickel produced to 7.10 g and then solving for "t": t = (7.10 x 96485) / (4.96 x 58.69) = 16.6 hours. such that the current would require 16.6 hours of application to plate out 7.10 g of nickel.
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colligative properties of solutions include all of the following except . question 10 options: depression of the freezing point of a solution upon addition of a solute to a solvent depression of vapor pressure upon addition of a solute to a solvent an increase in the osmotic pressure of a solution upon the addition of more solute the increase of reaction rates with increase in temperature elevation of the boiling point of a solution upon addition of a solute to a solvent
The increase in reaction rates with an increase in temperature is not a colligative property of a solution.
Freezing-point depression is the decrease of the freezing point of a solvent in addition to a non-volatile solute. It is a colligative property of the solution.
When a solute is added to a solvent, the area of the open surface of the solvent is decreased due to the presence of solute molecules. Hence, the vapor pressure of the solution is less than the vapor pressure of the pure solvent. Therefore, there is a depression of vapor pressure upon the addition of a solute to a solvent.
As the vapor pressure is decreased, the boiling point will be increased, as it would take more temperature to achieve the saturated vapor pressure. This leads to the elevation of the boiling point.
If more solute is added to a solvent, then the concentration gradient will be increased, which leads to an increase in osmotic pressure.
If the reaction is exothermic then the reaction rate decreases with the increase in temperature. But if the reaction is endothermic then the reaction rate increases with the increase in temperature. Hence, it is not a colligative property of solutions.
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what are the ultimate origins of coal, oil, and natural gas? which fuel is in greatest reserve abundance
Answer:
Coal, oil, and natural gas are all fossil fuels that were formed from the remains of plants and animals that lived millions of years ago.
Coal was formed from the remains of plants that grew in vast swamps and bogs during the Carboniferous period, about 300 million years ago. Over time, these plants were buried by sediment and subjected to heat and pressure, which transformed them into coal.
Oil and natural gas were formed from the remains of tiny marine organisms, such as plankton and algae, that lived in the oceans and seas hundreds of millions of years ago. When these organisms died, their remains sank to the bottom of the ocean and were buried by sediment. Over time, heat and pressure transformed the organic material into oil and natural gas.
In terms of reserve abundance, natural gas is currently in the greatest supply. According to the US Energy Information Administration (EIA), global natural gas reserves were estimated at 198 trillion cubic meters as of January 2022. This is followed by oil, with global reserves estimated at 1.73 trillion barrels, and coal, with global reserves estimated at 1.03 trillion short tons. However, it's important to note that the availability and distribution of these resources can vary widely by region, and factors such as extraction costs, market demand, and environmental regulations can all influence their commercial viability.
true or false: compared with solids, the distances between molecules increase for all solids when they turn into liquids.
False. The distance between molecules decreases for all solids when they turn into liquids.
Solids vs liquidsWhen a solid turns into a liquid, the distances between molecules generally decrease, rather than increase.
In a solid, molecules are typically arranged in a regular, ordered pattern and are closely packed together. As the solid is heated and melts, the molecules gain kinetic energy, causing them to vibrate and move more rapidly.
This increase in motion allows the molecules to break free of their ordered positions and slide past one another, resulting in a decrease in intermolecular distances and a transition from a solid to a liquid state.
There are some exceptions to this general trend, such as in cases where the solid structure is more porous and loosely packed than the liquid, but in most cases, the statement is false.
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how much heat (in cal) is required to boil 142 g of ammonia, nh3? the heat vaporization of ammonia is 327cal/g
It would require 46434 calories of heat to boil 142 g of ammonia.
When a liquid changes form into a gas, the process is called vaporization. You can watch vaporization when you boil a pot of water. Vaporization happens in two ways: evaporation and boiling. Evaporation occurs when sunlight shines on water until it changes to vapor and rises into the air
To calculate the amount of heat required to boil 142 g of ammonia, NH3, we can use the formula:
Heat = mass x heat of vaporization
where the mass is 142 g and the heat of vaporization is 327 cal/g.
Therefore, the heat required to boil 142 g of ammonia is:
Heat = 142 g x 327 cal/g
Heat = 46434 cal
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penicillin g, also known as benzylpenicillin, is an antibiotic. its chemical formula is c16h18n2o4s. what is the molecular mass of penicillin g? your answer should have six significant figures.
An antibiotic is penicillin G, sometimes referred to as benzylpenicillin. Its molecular structure is C16H18N4S. the molecular mass of penicillin G is 334.386 g/mol.
To calculate the molecular mass of penicillin G, we need to add the atomic masses of all the atoms in its chemical formula.
The atomic masses of each element are:
C: 12.011 g/mol
H: 1.008 g/mol
N: 14.007 g/mol
O: 15.999 g/mol
S: 32.06 g/mol
To calculate the molecular mass of penicillin G, we add the atomic masses of each element in the chemical formula:
Molecular mass = (16 x 12.011) + (18 x 1.008) + (2 x 14.007) + (4 x 15.999) + 32.06
Molecular mass = 334.386 g/mol
Therefore, the molecular mass of penicillin G is 334.386 g/mol.
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how many buckets (different kinds of imf) would we need to separate these chemicals? c2h6, ch3f, ch4, nh3
The number of buckets we need to separate these chemicals is 3.
Intermolecular force of the attraction is defined as the attraction by which two atoms or two molecules combine to form a molecule or matter. This force is basically attractive in nature. Intermolecular forces are the forces of attraction or repulsion which acts between neighboring particles. It acts between atom and ions also. The intermolecular force usually varies for solid, liquid and gaseous matter.
Here, C₂H₆ have London dispersion forces
CH₃F have Dipole-Dipole forces
CH₄ have London dispersion forces
NH₃ have hydrogen bonding
Hence, in order to separate these chemicals we need 3 buckets (different kinds of imf).
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what is the composition in at% ag of an alloy that consists of 90.6 wt% ag and the remaining wt% cu? supply an answer that is rounded to the nearest 0.1 at%.
The composition in at% Ag of the alloy is 85.2%.
To calculate the atomic percentage (at%) of Ag in the alloy,
we need to know the atomic weights of both Ag and Cu.
The atomic weight of Ag is 107.87 g/mol, while the atomic weight of Cu is 63.55 g/mol.
First, we can calculate the weight percentage of Cu in the alloy:
90.6 wt% Ag + x wt% Cu = 100 wt%
x wt% Cu = 100 wt% - 90.6 wt% Ag = 9.4 wt% Cu
Next, we can convert the weight percentage of Cu to the atomic percentage of Cu:
9.4 wt% Cu * (1 mol Cu/63.55 g) * ([tex]6.02\times10^{23 }[/tex]atoms/mol) = 8.36 x [tex]10^{22}[/tex] atoms Cu
100 wt% - 9.4 wt% = 90.6 wt% Ag
90.6 wt% Ag * (1 mol Ag/107.87 g) * (6.02 x [tex]10^{23}[/tex] atoms/mol) = 4.81 x [tex]10^{23}[/tex]atoms Ag
Now we can calculate the atomic percentage of Ag:
at% Ag = (4.81 x [tex]10^{23}[/tex] atoms Ag) / (4.81 x [tex]10^{23}[/tex] atoms Ag + 8.36 x [tex]10^{22}[/tex]atoms Cu) * 100%
at% Ag = 85.2%
Therefore, the composition in at% Ag of the alloy is 85.2%. Rounded to the nearest 0.1 at%, the answer is 85.2 at% Ag.
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why does squeezing the bottle cause the pressure of the CO2 gas in the solution to increase?
what is a scientific lens in ap seminar
A scientific lens in AP Seminar is a perspective or viewpoint that focuses on using the scientific method and empirical evidence to analyze and understand a given topic or issue.
A scientific lens emphasizes the importance of objective observation, experimentation, and data analysis in forming conclusions and making decisions.In AP Seminar, students are encouraged to use a variety of lenses or perspectives to examine and analyze complex issues. The scientific lens is one of these perspectives, and it is often used to examine topics related to science, technology, and medicine. However, the scientific lens can also be applied to other fields and disciplines, such as economics, psychology, and sociology.
By using the scientific lens, students can gain a deeper understanding of the underlying causes and effects of a given issue, and can develop more informed and evidence-based opinions and solutions. This lens is particularly useful for examining complex and multifaceted issues, as it allows students to break down the issue into smaller, more manageable components, and to analyze each component using the scientific method.
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how many tons of carbon (as carbon dioxide) are released into the air each year? group of answer choices ~20 thousand tons ~20 million tons ~20 billion tons ~20 trillion tons
20 billion tons of carbon (as carbon dioxide) are released into the air each year. So option c. is the correct answer.
Each year, human actions release more carbon dioxide into the atmosphere than natural cycles can deduct, resulting in the quantity of carbon dioxide in the atmosphere inflating. The global average carbon dioxide forms a new record high in 2021: 414.72 parts per million. Carbon dioxide concentrations are rising primarily because of the fossil fuel that people are burning for energy.
Fossil fuels like coal and oil contain carbon that plants removed out of the atmosphere through photosynthesis over multiple millions of years; we are reciprocating that carbon to the atmosphere in merely a few hundred.
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what nineteenth-century english scientist offered proof that atoms existed?A. AristotleB. DemocritusC. John DAltonD. Isaac Newton
John Dalton was the first scientist to propose an atomic theory. He discovered that chemical always have whole number ratios for atoms. So correct answer is option C.
In 1800s Dalton suggested that all the chemical components are in whole number ratios of atoms. In a molecule we cannot have a fraction of an atom, but a whole atom undergoes changes in chemical reactions.
Dalton's book "A New System of Chemical Philosophy" was the book introducing application of atomic theory for the first time. In the book he depicted how elements combine to form compounds and explain phenomena that supports atomic theory.
By proposing law of multiple proportions Dalton stated that two or more elements combine to form compounds with different weights, but the weight of element in each compound will be in simple integer ratios. This supports the presence of a smallest indivisible unit called atom.
So, the scientist offered the proof that atoms existed is John Dalton.
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In the presence of oxygen, the enzyme TYROSINASE catalyzes the oxidation of DOPA (3,4-dihydroxyphenylalanine), producing dopaquinone. Dopaquinone spontaneously converts into dopachrome (a dark orange/brown molecule).
Here is a simple diagram that illustrates this reaction:
DOPA + O2 ⇒⇒⇒TYROSINASE⇒⇒⇒ Dopaquinone ≈ Dopachrome (orange/brown)
Which of the following statements best describes tyrosinase?
1. A product of an enzymatic reaction
2. A polypeptide chain with active sites that bind DOPA and Oxygen
3. A substrate that is converted to dopachrome
4. A coenzyme that binds to oxygen
5. An inhibitor that prevents oxidation
The statement that best describes tyrosinase is - 2. A polypeptide chain with active sites that bind DOPA and Oxygen.
Tyrosinase, an oxidase, is the enzyme that limits the rate at which melanin is produced. The Raper Mason pathway, which consists of two separate melanin production processes, is where the enzyme is mostly involved. First, a monophenol is hydroxylated, and then an o-diphenol is changed into the matching o-quinone. Melanin is finally formed by a series of processes involving o-Quinone. Tyrosinase is a copper-containing enzyme that catalyses the oxidation of tyrosine to produce melanin and other colours in plant and animal tissues. It can be found inside the melanosomes that the skin's melanocytes produce. The TYR gene in humans encodes the tyrosinase enzyme.
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Which food chain best represents the flow of energy from plants to mountain lions in this food web?
1. Plants, grasshoppers, frogs, mountain lions
2. Plants, deers, coyotes, mountain lions
3. Plants, deer, birds, mountain lions
4. Plants, grasshoppers, birds, mountain lions
The voltage produced by the colorimeter is __________ to the absorbance of the sample and ____________ to the light intensity.
A) Directly proportional, indirectly proportional
B) Directly proportional, directly proportional
C) Indirectly proportional, indirectly proportional
D) Indirectly proportional, directly proportional
E) None of the above
The voltage produced by the colorimeter is __________ to the absorbance of the sample and ____________ to the light intensity.
E) None of the above
Relation between transmittance and absorbance is as follows.
Therefore we know that the amount of light that passes through a solution is known as transmittance.
It can be expressed as follows;
T= [tex]\frac{I_{t} }{I_{0} }[/tex]
Now we know that, I, is the intensity of transmitted light.
I is the initial intensity of light beam.
Then the colorimeter produces an output voltage which is linearly varies with transmittance that is light intensity.
Relation between absorbance and transmittance is as follows:
A = log ([tex]\frac{I}{T}[/tex])
The reciprocal of transmittance of the sample varies logarithmically varies with absorption.
Therefore, we can say that the voltage produced by the colorimeter is varies logarithmically reciprocal to the absorbance of the sample and linear to the light intensity.
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The Difference Between a Hot Cup of Water and a Cold One in Terms of Thermal Energy
Answer:
The difference between a hot cup of water and a cold one in terms of thermal energy can be described as the amount of heat energy that is present in each cup. The hot cup of water contains more thermal energy than the cold one due to its higher temperature. This means that the hot cup has more energy to transfer to its surroundings, and will cool down faster than the cold cup. The thermal energy in a cup of water is related to the temperature, with hotter water having a higher thermal energy than colder water.
Explanation:
For each of the following gas-phase reactions, write the rate expression in terms of the appearance of each product or disappearance of each reactant.
Part A
2H2O(g)→2H2(g)+O2(g)
Match the ratios in the left column to the appropriate blanks in the expressions on the right.
1. rate = ______ Δ[H2]/Δt
2. rate = ______ Δ[H2O]/Δt
3. rate = ______ Δ[O2]/Δt
Part B
2SO2(g)+O2(g)→2SO3(g)
Match the ratios in the left column to the appropriate blanks in the expressions on the right.
1. rate = ______ Δ[SO3]/Δt
2. rate = ______ Δ[SO2]/Δt
3. rate = ______ Δ[O2]/Δt
Part C
Match the ratios in the left column to the appropriate blanks in the expressions on the right.
2NO(g)+2H2(g)→N2(g)+2H2O(g)
1. rate = _____ Δ[N2]/Δt
2. rate = _____ Δ[H2O]/Δt
3. rate = _____ Δ[H2]/Δt
4. rate = _____ Δ[NO]/Δt
Part D
N2(g)+2H2(g)→N2H4(g)
Match the ratios in the left column to the appropriate blanks in the expressions on the right.
1. rate = _____ Δ[H2]/Δt
2. rate = _____ Δ[N2H4]/Δt
3. rate = _____ Δ[N2]/Δt
For each of the gas-phase reactions given, the rate expressions are based on the appearance of each product or disappearance of each reactant.
For the reaction 2H2O(g)→2H2(g)+O2(g), the rate expressions are:
1.rate = -Δ[H2]/Δt
2.rate = -Δ[H2O]/Δt
3.rate = Δ[O2]/Δt
In this equation, the negative sign is used to denote the disappearance of the reactants, while the positive sign denotes the appearance of the products. The rate expression for this reaction shows the relationship between the change in concentration of each reactant or product to the rate of the reaction.
For the reaction 2SO2(g)+O2(g)→2SO3(g), the rate expressions are:
1.rate = Δ[SO3]/Δt
2.rate = -Δ[SO2]/Δt
3.rate = -Δ[O2]/Δt
The negative sign is used to denote the disappearance of the reactants, while the positive sign denotes the appearance of the products. The rate expression for this reaction shows the relationship between the change in concentration of each reactant or product to the rate of the reaction.
For the reaction 2NO(g)+2H2(g)→N2(g)+2H2O(g), the rate expressions are: 1.rate = Δ[N2]/Δt 2.rate = Δ[H2O]/Δt 3.rate = -Δ[H2]/Δt rate = -Δ[NO]/Δt
The negative sign is used to denote the disappearance of the reactants, while the positive sign denotes the appearance of the products. The rate expression for this reaction shows the relationship between the change in concentration of each reactant or product to the
1.rate = -2 Δ[H2]/Δt
2.rate = 1 Δ[N2H4]/Δt
3.rate = -1 Δ[N2]/Δt
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How would the diagram change if the substance was water instead of rock salt
The diagram would look similar, but instead of the salt molecules, there would be water molecules. The water molecules would form hydrogen bonds, which would give the structure of the diagram a different shape.
What is the water molecules?A water molecule is a molecule composed of two hydrogen atoms and one oxygen atom, connected by covalent bonds. Water is essential to all known forms of life and is the most abundant liquid on Earth. It is also the most abundant molecule in the human body, making up 55-60% of our total body weight. Water molecules are polar, with the oxygen atom having a slightly negative charge and the hydrogen atoms having a slightly positive charge. This polarity enables water molecules to form hydrogen bonds with each other, creating a strong network of hydrogen bonds within the liquid. This network of hydrogen bonds is what gives water many of its unique properties, such as its high surface tension, high boiling point, and high heat capacity.
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Please explain how they got these answers?? Like step by step if u can. Please hurryyyyy 50 points
The frequency of a microwave that has a wavelength of 8.72 × 10-¹⁰m is 3.44 × 10¹⁷Hz.
How to calculate frequency?Wavelength is often designated in physics as λ, and corresponds to the velocity of the wave divided by its frequency.
The wavelength, λ, of a substance can be calculated as follows:
λ = v/f
According to this question, a microwave possesses a wavelength of 8.72 × 10-¹⁰m. The frequency can be calculated as follows:
f = v/λ
f = 3 × 10⁸ ÷ 8.72 × 10-¹⁰
f = 3.44 × 10¹⁷Hz
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What amino acids are involved in hydrogen bonds?
how do milk, corn syrup, and pineapple juice react in the benedict’s reagent? why?
Milk, corn syrup, and pineapple juice all react with Benedict's reagent to produce a color change, indicating the presence of reducing sugars.
This is because Benedict's reagent contains copper ions that are reduced by the aldehyde or ketone groups of the reducing sugars, forming a brick-red precipitate of copper(I) oxide.
Milk and corn syrup contains lactose and glucose/fructose, respectively, while pineapple juice contains primarily sucrose. All of these sugars have reducing properties that react with the copper ions in Benedict's reagent. The intensity of the color change can be used to estimate the concentration of reducing sugars in a sample.
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2. the haber process is used to make ammonia on an industrial scale. if you want to produce 10 metric tons of ammonia, how would you calculate the mass of the reactants needed?
To produce 10 metric tons of ammonia using the Haber process, you would need approximately 8.23 metric tons of N2 and 0.79 metric tons of H2 as reactants.
What is the mass of the product?The mass of the reactants and products must match for a chemical reaction to occur. The products will therefore have the same mass if you start with a specific amount of mass and it interacts.
The Haber process is a well-known industrial process used to produce ammonia. To calculate the mass of reactants needed to produce 10 metric tons of ammonia using the Haber process,
The balanced chemical equation for the Haber process is: The Haber process requires about 8.23 metric tonnes of N2 and 0.79 metric tonnes of H2 as reactants to produce 10 metric tonnes of ammonia.
A well-known industrial procedure for creating ammonia is the Haber process. The balanced chemical equation for the Haber process is: The mass of reactants required to make 10 metric tonnes of ammonia using the Haber process is:
N2 (g) + 3 H2 (g) = 2 NH3 (g)
Therefore, you must determine how many moles of NH3 are needed to make 10 metric tonnes (10,000 kg) of ammonia:
2NH3 is produced by the following equation: N2 (g) + 3H2 (g) (g)
Number of moles of NH3 = 10,000,000 g / 17.03 g/mol = 587,459.3 mol
Since three moles of H2 are required to produce two moles of NH3, the number of moles of H2 required can be calculated as:
Number of moles of H2 = (2/3) x Number of moles of NH3
Number of moles of H2 = (2/3) x 587,459.3 mol = 391,639.5 mol
Similarly, the number of moles of N2 required can be calculated as:
Number of moles of N2 = (1/2) x Number of moles of NH3
Number of moles of N2 = (1/2) x 587,459.3 mol = 293,729.7 mol
Finally, the mass of each reactant can be calculated using their respective molar masses:
Mass of N2 = Number of moles of N2 x Molar mass of N2 = 293,729.7 mol x 28.02 g/mol = 8,228,236.9 g = 8.23 metric tons
Mass of H2 = Number of moles of H2 x Molar mass of H2 = 391,639.5 mol x 2.02 g/mol = 790,136.2 g = 0.79 metric tons.
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oil is insoluble in water. this is because of the differences in the polarity of the liquids, one is non polar and the other is polar. however, oil drops can be suspended in water to form a colloidal solution by adding --------------------------.
Oil can be suspended in water to form a colloidal solution by adding an emulsifier.
An emulsifier is a substance that helps to mix two otherwise immiscible liquids, such as oil and water, by reducing the surface tension between them. Common emulsifiers for oil and water include soap, detergent, and surfactant molecules. These molecules have one end that is attracted to the oil and one end that is attracted to the water, allowing them to hold the oil and water together in a stable mixture.
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how does the difference in electronegativity of the two atoms in a bond affect the polarity of the bond?
The distribution of electrons within a bond is influenced by the two atoms' different electronegativities, which in turn impacts the bond's polarity.
An atom's propensity to draw electrons into a chemical bond is known as its electronegativity, a feature that is measured. On the Pauling scale, it has a value between 0 and 4, with values rising as the ability of an atom to attract electrons does. The polarity of the bond and, thus, the nature of the interaction between the atoms, are determined by the disparity in electronegativity between the two bound atoms. In a bond between two atoms with comparable electronegativities, the electrons are distributed equally among the atoms, making the bond nonpolar. The electrons are not shared equally and there are positive and negative ends to a polar connection formed between two atoms when their electronegativities are significantly different.
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Convert 2.55 moles of calcium chloride to grams.
CaCl2
Answer:
283.1g CaCl2
Explanation:
Use Molar Mass of CaCl2 and convert.
2.55molsCaCl2 x 111g/1mol = 283.1g CaCl2
5. What criteria are used to distinguish between a chemical change and a physical
change?
In chemical change, the chemical composition of substance changes while in physical changes the chemical composition remains the same.
What are chemical changes?Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
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Which solution will exhibit the smallest increase in boiling point compared to plain water?
When table salt is added to water, a solution is created that has a greater boiling point than just plain water.
How does the boiling point of a solution compared to the pure solvent?Because the solution (which has a lower vapour pressure) must be heated to a higher temperature in order for the vapour pressure to match the external pressure, the boiling point of a solution will thus be higher than the boiling point of the pure solvent (i.e., the boiling point).The polar substance always has the higher boiling point, which denotes stronger attraction forces, or stronger intermolecular forces, between individual molecules. Because freezing or solidification promotes order and reduces entropy, solutions have lower freezing points than pure solvents or solutes.
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Answer: The answer is 0.5 M AIN
Explanation:
which isoelectronic series is correctly arranged in order of increasing radius? group of answer choices ca2 < ar < k < cl- ca2 < k < cl- < ar cl- < ar < k < ca2 k < ca2 < ar < cl- ca2 < k < ar < cl-
The correct order of increasing radius for this isoelectronic series is: Cl- < K+ < Ca2+ < Ar.The correct order of increasing radius for the isoelectronic series depends on the effective nuclear charge experienced by the electrons in each ion.
The effective nuclear charge is the net charge experienced by an electron in an atom or ion, taking into account the shielding effect of other electrons in the atom or ion.
In this case, the isoelectronic series includes Ca2+, Ar, K+, and Cl-. Since all ions have the same number of electrons, the ion with the highest effective nuclear charge will have the smallest radius, while the ion with the lowest effective nuclear charge will have the largest radius.
Therefore, the correct order of increasing radius for this isoelectronic series is: Cl- < K+ < Ca2+ < Ar.
This is because Cl- has the lowest effective nuclear charge, due to its high electron density and high level of electron shielding, and therefore has the largest radius. Conversely, Ar has the highest effective nuclear charge, due to its low electron density and lack of electron shielding, and therefore has the smallest radius.
Therefore, the correct answer is "cl- < k < ca2+ < ar" as this order reflects the trend of increasing radius as the effective nuclear charge decreases.
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