Answer:
A) 6.50 moles 0₂
Explanation:
In the reaction, 2 moles of Calcium oxide decomposes to produce 2 moles of Calcium and 1 mole of Oxygen gas.
So, when 6.50 moles of Calcium oxide decomposes, 6.50 x (1 mole O₂ / 2 moles Calcium oxide) = 6.50 x 0.5 = 3.25 moles of Oxygen gas will be produced.
And as 3.25 x 2 = moles O₂,
What is the process of breaking down a compound into its individual elements called
Answer:Decompositiin
Explanation:
Answer:
decomposition
Explanation:
Decomposition is a chemical reaction where a compound breaks down into two or more simpler compounds or elements. The reverse process of decomposition is called synthesis or combination. In this process, two or more simple substances react to form a more complex compound. Decomposition reactions can be either spontaneous or induced by heat, light, or other forms of energy. Decomposition reactions are often used in industrial processes to extract metal from ore or to produce fertilizers and other products.
ALLEN
how many particles are in 0.431 moles of PF5
Taking into account the definition of Avogadro's Number, 2.5959×10²³ particles of PF₅ are present in 0.431 moles of PF₅.
Definition of Avogadro's NumberAvogadro's number is the number of constituent particles (usually atoms or molecules) found in one mole amount of substance. Therefore, it is the proportional factor that relates the molar mass of a substance to the mass of a sample.
Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Number of particles in this caseYou can apply the following rule of three: if 1 mole of PF₅ contains 6.023×10²³ particles, 0.431 mole of the compound contains how many particles?
amount of particles= (0.431 moles × 6.023×10²³ particles)÷ 1 mole
amount of particles= 2.5959×10²³ particles
Finally, 2.5959×10²³ particles of PF₅ are present.
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58.94 g of a substance of molecular mass 182 is dissolved in 1000 g of water at 20°C. At this temperature the vapour pressure of water is 17.5 mmHg. Calculate the vapour pressure of this dilute solution.
The vapor pressure of the dilute solution is 17.38 mmHg at 20°C.
What is the vapor pressure of solutions?Vapor pressure is the amount of pressure that the vapors apply to the liquid solvent when they are in equilibrium and at a particular temperature.
The environment's temperature and the type of liquid have an impact on vapor pressure.
To calculate the vapor pressure of the solution, we use the formula below:
Psolution = X * P°water
where;
Psolution is the vapor pressure of the solution,X is the mole fraction of water in the solution, andP°water is the vapor pressure of pure water.To calculate X, we need to know the number of moles of water and the number of moles of solute in the solution. We can assume that the volume of the solution is 1000 mL (or 1 L), since the density of water is close to 1 g/mL at room temperature.
Number of moles of water, n₁, in the solution:
n = mass / molar mass
n = 1000 g / 18.015 g/mol
n = 55.49 mol
Number of moles of solute, n₂ in the solution:
n = 58.94 g / 182 g/mol
n = 0.324 mol
Mole fraction of water in the solution:
X = n₁ / (n₁ + n₂)
X = 55.49 mol / (55.49 mol + 0.324 mol)
X = 0.994
Now we can calculate the vapor pressure of the solution:
Psolution = X * P°_water
Psolution = 0.994 * 17.5 mmHg
Psolution = 17.38 mmHg
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Write the balanced molecular equation, including phases, for the reaction of aqueous sodium phosphate with aqueous
iron(II) nitrate.
molecular equation:
The balanced molecular equation, including phases, for the reaction of aqueous sodium phosphate with aqueous iron(II) nitrate is given below:
molecular equation: Na₃PO₄ (aq) + 2 Fe(NO₃)₂ (aq) → 2 Fe₃(PO₄)₂ (s) + 6 NaNO₃ (aq)
What is a molecular equation?Molecular equations are a type of chemical equation that shows the chemical formulas of reactants and products without indicating the ionic behavior of the species. In other words, molecular equations do not show the dissociation of ionic compounds into their constituent ions in aqueous solutions. This type of equation is commonly used to represent reactions in solid-state or gas-phase.
The molecular equation for the reaction of aqueous sodium phosphate with aqueous iron(II) nitrate is:
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Which element reacts most rapidly with water at 25 °C to
produce a gas?
Answer:
Lithium
Explanation:
The element that reacts most rapidly with water at 25°C to produce a gas is Lithium . Lithium reacts with water to produce hydrogen gas and lithium hydroxide.
Answer:
Sodium NA and NAOH sodium hydroxide
Explanation:
In the laboratory, a student dilutes 15.7 mL of a 11.8 M perchloric acid solution to a total volume of 200. mL. What is the concentration of the diluted solution?
? M
The concentration of the diluted solution is 0.92 M.
What is concentration?
Concentration refers to the amount of a substance present in a given volume or mass of a solution. It is typically expressed as the amount of solute per unit volume of solution or per unit mass of solvent.
To calculate the concentration of the diluted solution, we need to use the formula:
C1V1 = C2V2
where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.
Plugging in the values given, we get:
C1 = 11.8 M
V1 = 15.7 mL
V2 = 200 mL
We want to find C2, so we rearrange the formula to solve for C2:
C2 = (C1 x V1) / V2
Substituting the values, we get:
C2 = (11.8 M x 15.7 mL) / 200 mL
C2 = 0.92 M
Therefore, the concentration of the diluted solution is 0.92 M.
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2Hg + O2 ----> 2HgO
If you had 6 mol of oxygen and 12 mol of mercury, what would be the limiting reactant (if any)? Show your work.
According to the stoichiometry of the chemical reaction, the limiting reactant is oxygen which is important for reaction to proceed.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is important while balancing chemical equations and chemical calculations used for making solutions or dilutions.
The limiting reagent is oxygen as it is present in less amount and will limit the formation of product that is mercuric oxide.Once it is used up, the reaction will not proceed.
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Green S is a compound that produces green color. The maximum absorption (λmax) of this compound is at 650 nm. Tuzki wants to determine the molar absorptivity (ε) of this green compound by generating a calibration curve. Below is the absorbance of different concentrations of Green S solutions. Plot Absorbance vs concentration, generate the trendline and determine ε of this green compound (L/(mol.cm)), assuming the length of the solution in a cuvette is 1.00 cm. (Instruction: please enter only a number below)
20 is the correct answer .
What is Absorbance ?
In physics and chemistry, "absorbance" (also known as "optical density") is a measure of how much light is absorbed by a material as it passes through it. It is expressed as a logarithmic ratio of the intensity of the incident light (I0) to the intensity of the transmitted light (I), typically using the formula A = -log(I/I0). The absorbance of a material depends on its composition and the wavelength of the incident light. Absorbance is commonly used to quantify the concentration of a substance in a solution, using a spectrophotometer or other optical instrument that can measure the amount of light absorbed by the solution at a specific wavelength. The Beer-Lambert law states that there is a linear relationship between absorbance and concentration, making it a useful tool in analytical chemistry and biochemistry.
E = A/cb
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Analysis of a compound indicates that it contains 1. 04 g k, 0. 70 g cr, and 0. 86 g o. Find its empirical formula.
the empirical formula of the compound that contains 1. 04 g k, 0. 70 g cr, and 0. 86 g o. is K0.5Cr1O2.
The empirical formula of a compound is the simplest whole-number ratio of atoms of each element in the compound. To find the empirical formula of a compound, you need to determine the number of moles of each element present in the sample.
First, you need to convert the masses of each element to moles:
For potassium (K), 1.04 g / 39.10 g/mol = 0.0264 moles
For chromium (Cr), 0.70 g / 51.99 g/mol = 0.0134 moles
For oxygen (O), 0.86 g / 16.00 g/mol = 0.0538 moles
Next, divide each number of moles by the smallest number of moles to get the simplest whole-number ratio:For potassium (K), 0.0264 moles / 0.0264 moles = 1
For chromium (Cr), 0.0134 moles / 0.0264 moles = 0.5
For oxygen (O), 0.0538 moles / 0.0264 moles = 2.0
Therefore, the empirical formula of the compound is K0.5Cr1O2. This represents the simplest whole-number ratio of atoms of each element in the compound.
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11
Lab Assignment 6 = 13%
Complete the following table
ATOM/ION
120Sn
25Mg²+
#PROTONS
I
# ELECTRONS
For Sn;
Protons = 50, Electrons = 50
For Mg^2+
Protons 12, Electrons = 10
How do you determine the number of protons or electrons?
The number of protons in an atom is called the atomic number and determines the chemical identity of the element. Each element has a unique atomic number, which is equal to the number of protons in the nucleus of one of its atoms.
To determine the number of protons in an atom, you can look up the atomic number of the element in the periodic table. The periodic table is a chart that organizes elements based on their atomic number and other properties. The atomic number is listed for each element and indicates the number of protons in its nucleus.
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The width of a human hair is 125 μm. What is this length in inches if 1.000 m = 39.37 inches?
The length in inches would be 4.921 x [tex]10^{-3[/tex] inches.
Dimensional analysisWe want to convert the with of human hair from 125 μm to inches.
Recall that:
1 μm = [tex]10^{-6[/tex] m
Thus:
125 μm = 125 x [tex]10^{-6[/tex] m
Also:
1 m = 39.37 inches
Thus:
125 x [tex]10^{-6[/tex] m = 39.37 x 125 x [tex]10^{-6[/tex] m
= 4921.25 x [tex]10^{-6[/tex] inches
= 4.921 x [tex]10^{-3[/tex] inches
In other words, 125 μm is equivalent to 4.921 x [tex]10^{-3[/tex] inches.
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A liquid sample of water (density = 0.9971 g/mL) has a volume of 10.00 mL. The water is allowed to freeze to become ice (density = 0.934 g/mL). What will be the volume of the
ice cube?
A student sets up two reactions. Reaction 1 uses 0.210 mol/L of reactant, and Reaction 2 uses 0.510 mol/L of
reactant. How many times faster is Reaction 2 compared to Reaction 1?
The relationship between rate and reactant concentration is given by the rate equation. Here reaction 2 is 2.4289 times faster than 1.
What is rate equation?An equation which expresses the experimentally observed rate of a reaction in terms of the molar concentrations of the reactants that determine the rate of a reaction is called the rate equation.
Rate ∝ concentration
Rate = k [ concentration ]
Rate₁ / Rate₂ = k [conc]₁ / [conc]₂
= k × 0.210 / k × 0.510
= 0.4117
Rate₁ = 0.4117 × Rate₂
Rate₁ / 0.4117 = Rate₂
2.4289 × Rate₁ = Rate₂
Thus reaction 2 is 2.4289 times faster compared to reaction 1.
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Carbon disulfide burns in oxygen to yield carbon dioxide and sulfur dioxide according to the following chemical equation. CS2 + 3O2 → CO2 + 2SO2
If 1.00 mol CS2 reacts with 1.00 mol O2, identify the limiting reactant.
How many moles of excess reactant remain?
How many moles of each product are formed? (you need to give 2 answers)
In the given reaction, carbon disulfide acts as an excess reagent and oxygen acts as a limiting reagent.
Do the limiting reactant calculation.a) Oxygen is the limiting reactant.
b) 0.667 moles of carbon disulfide will still be present.
c) The formation of 0.333 moles of carbon dioxide and 0.667 moles of sulfur dioxide.
provided here,
To make 1 mole of carbon dioxide and 2 moles of sulfur dioxide from 1 mole of carbon disulfide, 3 moles of oxygen are required.
1.00 ol of carbon disulfide is the number of moles.
One mole of oxygen is equal to 1.00 mol.
The limiting reactant is oxygen. It will be totally eaten. (1.00 mol).
(B) An excess reactant is carbon disulfide. It will respond with
Oxygen reacts with 0.33 moles of carbon disulfide.
The extra reagent still present:
0.667 moles There will be a residue of carbon disulfide.
Determine the moles of each product:In order to make one mole of carbon disulfide and one mole each of carbon dioxide and sulfur dioxide, you need three moles of oxygen.
The carbon dioxide equivalent for 1 mole of oxygen is 1 mole/3, or 0.333 moles.
Sulfur dioxide is equal to 0.667 moles per 1.00 mol of oxygen (1.00 mol/(3/2)) mol.
Since carbon disulfide is an excess reagent in the above reaction, oxygen is a limiting reagent.
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Which of the below choices represents the ranking with which molecules cross a synthetic membrane composed of phospholipids but not proteins? (Ranking in order from least easily to most easily)
a. hydrophobic molecules, small polar molecules, large polar molecules, ions
b. hydrophobic molecules, ions, small polar molecules, large polar molecules
c. ions, large polar molecules, small polar molecules, hydrophobic molecules
d. small polar molecules, large polar molecules, ions, hydrophobic molecules
A synthetic membrane made of phospholipids but lacking proteins permits the passage of hydrophobic molecules, small polar molecules, large polar molecules, and ions.
Transport is the term used to describe the movement of molecules within a cell from one location to another. Hydrophobic molecules, such as oxygen, are the first to cross a synthetic membrane made of phospholipids rather than protein, followed by small polar molecules like water, large polar molecules like glucose, and then ions, which may be sodium ions. Ions are the last to cross a membrane. If the hydrophobic molecules are small enough, they can easily flow through the plasma membrane because the inside of the membrane also despises water.
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What is the molar mass of iron in Daltons?
Answer:
The molar mass of iron (Fe) is approximately 55.845 g/mol or 55,845 Daltons.
Explanation:
Aɳʂɯҽɾҽԃ Ⴆყ ɠσԃKEY ꦿ
Element A + compound B —> element C + compound D
————————————-
What is the reaction type?
Single replacement
Decomposition
Combustion
Synthesis
Double Replacement
Answer:
Single replacement
Explanation:
Answer:
single replacement reaction
Explanation:
This type of reaction, one element is swapped with another element in a compound, leading to the formation of two new compounds. The element A replaces one of the elements in compound B to form element C and compound D.
In a single replacement reaction, the reactants are typically elements in their elemental form and a compound. The element that is replaced is typically one that is more reactive, meaning it has a greater tendency to react and form a new compound. The new compound that is formed is typically more stable, meaning it has a lower tendency to react and form another new compound.
ALLEN
A 2.6−mL volume of seawater contains about 4.0 × 10−10 g of gold. The total volume of ocean water is about 1.5 × 1021 L. Calculate the total worth of all the gold in the world's oceans if the price of gold is $18.23 per gram.
The total volume of sea water is 1.5 × 10²¹ L. The amount of gold in the whole volume is 6 × 10¹¹ g of gold. Then, if one gram rate $18.23, the total worth of gold is $ 1.09×10¹³.
What is gold ?Gold is a metal widely used in ornaments and other plating as well. It is excavating from the places where its minerals or ore can be found in abundant and it worth higher prize.
Given that, 2.6 ml or 0.0026 L of ocean water contains 4 × 10⁻¹⁰ g of gold. Then, 1.5 × 10²¹ g contains,
1.5 × 10²¹ ×4 × 10⁻¹⁰ /0.0026= 6× 10¹¹ g of gold.
Price of one gram of gold = $18.23
then, price of the total amount 6× 10¹¹ g = 6× 10¹¹ g×$18.23 = $ 1.09×10¹³.
Therefore, the total price of gold in the world's ocean is $ 1.09×10¹³.
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Two perfumes are released at the same time. If one is standing 7.5 m from the point of release. Perfume A (molar mass 275 g/mol) and perfume B (molar mass 205 g/mol) at the same temperature. Which perfume will the person smell first? (show your working)
Answer:
perfume B
Explanation:
To determine which perfume a person will smell first, we need to determine the rate at which each perfume will travel to the person. The rate of a gas is proportional to the square root of its molar mass and the difference in partial pressures between the gas and the surroundings.
Since both perfumes are at the same temperature, the difference in partial pressures between the two perfumes will be the same. As a result, the perfume with the smaller molar mass (perfume B) will travel faster to the person and be smelled first.
if u coated the surface of a penny with a thin layer of a nonpolar liquid (oil) and then dropped alcohol and water onto the penny what would occur?
If you coated the surface of a penny with a thin layer of a nonpolar liquid (oil) and then dropped alcohol and water onto the penny what would occur is that the alcohol will mix with the water and spread out to form a thin layer on top of the oil.
What are non-polar substances?Any molecule without any electrical charges or partial charges is said to be a nonpolar substance. Atoms with similar levels of electronegativity make up nonpolar compounds.
Alcohol is a polar substance and water is also a polar substance.
Hence, the water and alcohol will not mix with the oil because oil is nonpolar and will not dissolve in a polar solvent like water or alcohol.
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If the radio waves transmitted by a radio station have a frequency of 93.5 MHz, what is the wavelength of the waves, in meters?
The wavelength of radio waves with a frequency of 93.5 MHz is equal to 3.2 meters
What is wavelength?Wavelength is a measure of the distance between two consecutive points in a wave. It is determined by the speed of the wave and its frequency, which is the number of waves that pass a point in a given period of time. Wavelength is usually measured in meters, and is sometimes expressed as the number of waves that pass a point in one second. Wavelengths can range from fractions of a nanometer to many kilometers.
The wavelength of radio waves is calculated using the following formula: wavelength (λ) = velocity (c) / frequency (f).
The velocity of radio waves in air is approximately 300,000,000 m/s.
Therefore, the wavelength of radio waves with a frequency of 93.5 MHz is equal to:
λ = 300,000,000 / 93,500,000 = 3.2 meters
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One method for reclaiming silver metal from silver chloride results in a 94.6% yield. Calculate the actual mass of silver that can be produced in this reaction if 100.0 g of silver chloride is converted to silver metal. 2AgCl(s) → 2Ag(s) + Cl2(g)
If 100.0 g of silver chloride is converted, the amount of silver metal that would be produced would be 94.6 g.
What is mass?Mass is described as the quantitative measure of inertia which is a fundamental property of all matter.
The reaction formula ]provided is already balanced, therefore the molar ratio of silver chloride to silver metal is 1:1.
Therefore, if 100.0 g of silver chloride is converted, we can expect to produce 100.0 g of silver metal but the yield of the reaction is only 94.6%, which means that only 94.6 g of silver metal would actually be produced.
We can calculated as follows:
100.0 g × 0.946 = 94.6 g
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The burning of 18.0 g of carbon produces 55.0 g of carbon dioxide. What is the theoretical yield of CO2? Then, calculate the percent yield of CO2. C + O2 → CO2
Theoretically, carbon dioxide can be produced by multiplying 0.139 moles of glucose by 6 moles of carbon dioxide per mole of glucose, which results in 0.834 moles of carbon dioxide.
What yield qualifies as theoretical?The theoretical yield of a chemical reaction is the volume of a product that is produced when a limiting reactant is completely converted. Because it indicates the product amount that would result from a perfect (theoretical) chemical reaction, it is not the same as that of the quantity that would actually acquire from a reaction in the lab.
What is the theoretical formula?Calculate its molar mass of a element by the weight of the compound, then multiply the result by 100 to determine the theoretical proportion of the element in the compound. The actual yield of a product in a chemical reaction is calculated by dividing it by the theoretical yield and multiplying the result by 100.
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Pls answer asap 100 points
For the oxidation of glucose (C6H12O6 + 6O2→6H2O + 6CO2), how many liters of carbon dioxide gas(CO2) will be produced when 950 g of glucose(C6H12O6) is oxidized completely?
Molar Masses:
C6H12O6 = 180.2 g/mol
Question 3 options:
709g
571g
960g
480g
Arrange the following solutions in order by their decreasing freezing points: 0. 1 m na3po4, 0. 1 m c2h5oh, 0. 01 m co2, 0. 15 m nacl, and 0. 2 m cacl2.
The solutions can be arranged in order of decreasing freezing points as follows: 0.2 M CaCl2 > 0.15 M NaCl > 0.1 M Na3PO4 > 0.1 M C2H5OH > 0.01 M CO2
The freezing point of a solution is lowered by the presence of solute particles, and the degree of lowering is proportional to the concentration of the solute.
Based on the given concentrations, we can arrange the solutions in order of decreasing freezing points as follows:
0.2 M CaCl2: This solution has the highest concentration of solute particles, and therefore the lowest freezing point. Calcium chloride dissociates into three ions in solution, which contributes to a greater degree of freezing point depression.
0.15 M NaCl: This solution has a lower concentration of solute particles compared to CaCl2, but still has a significant effect on the freezing point of the solution.
0.1 M Na3PO4: This solution contains a polyatomic ion, which dissociates into four particles in solution, contributing to a greater degree of freezing point depression than a monatomic ion like NaCl.
0.1 M C2H5OH: This is a molecular solute that does not dissociate in solution, and therefore has a lower effect on the freezing point compared to ionic solutes.
0.01 M CO2: This is also a molecular solute, and has the lowest effect on the freezing point due to its low concentration.
In summary, the solutions can be arranged in order of decreasing freezing points as follows: 0.2 M CaCl2 > 0.15 M NaCl > 0.1 M Na3PO4 > 0.1 M C2H5OH > 0.01 M CO2.
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At 500 oC cyclopropane (C3H6) rearranges to propene (CH3CHCH2) as shown by C3H6(g) → CH3CHCH2(g). The reaction is first-order with a half-life of 17 minutes. How long will it take for the concentration of C3H6 to drop to 12.5% of its initial value at 500 oC?
The compound with half life of 17 minute have the rate constant of 0.040 minutes⁻¹ will take to reach to 12.5% of the initial amount .
What is half life ?Half life of a sample is the time required to consume half of its initial amount in a reaction.
For a first order reaction,
the rate constant k = 1/t ln W0/Wt
where t is the time of consumption, W0 be the initial amount and Wt be the amount after time t.
The half life of the compound = 17 minutes
rate constant = k = 0.693/17 = 0.040 minutes⁻¹
The time taken to reach the concentration of 12.5 % of its original amount is calculated as follows:
t = 1/k ln Wo/(Wt )
= ln( 100/12.5)/ 0.040 minutes⁻¹
= 52.49 minutes
Therefore, taken to reach the concentration 12.5% of the initial amount is 52.49 minutes.
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Forming glycogen, which is a polymer, from glucose monomers is an example of
A. oxidation
B. anabolism
C. catabolism
D. an acid-base reaction
E. an enzyme reaction
Forming glycogen, which is a polymer, from glucose monomers is an example of anabolism
What is anabolism?Anabolism is a metabolic process that involves building larger molecules from smaller ones, typically using energy from metabolic pathways. This process is the opposite of catabolism, which is the breakdown of larger molecules into smaller ones.
Anabolic reactions play a crucial role in the growth and maintenance of cells and tissues, as well as in the storage of energy in the form of glycogen, fat, and other compounds.
Anabolic processes are responsible for the synthesis of proteins, nucleic acids, and other complex molecules that make up cells and tissues, and they also play a role in the regulation of various physiological processes, such as growth and development, energy metabolism, and immune function.
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In the first 13. 0 s of the reaction, 0. 018 mol of o2 is produced in a reaction vessel with a volume of 0. 380 l. What is the average rate of the reaction during this time interval?.
Answer:
the answer is 5
Explanation:becuase it is great for the society
what is the main function of the chloroplasts in a plant cell
Answer:
The main function of chloroplast in a plant is to prepare food for the plant, by the process of photosynthetic in the plant cell
Chloroplast contains a green pigment
Explanation:
Answer:
The main function of chloroplasts in a plant cell is to perform photosynthesis. Chloroplasts contain chlorophyll, which absorbs light energy and converts it into chemical energy through a process called the light-dependent reactions. The chemical energy is then used to produce glucose and other sugars from carbon dioxide and water in a process called the light-independent reactions or the Calvin cycle. This process provides the plant with its energy source, as well as produces oxygen as a by-product.
Explanation:
Only few substances can be used as natural indicators. Why?
Answer:
Only few substances can be used as natural indicators because, some natural indicators do not have chemical properties which can change the color of substances.
Explanation:
Natural indicators are obtained from natural sources such as plants. Some of the common examples of natural indicators include red cabbage, turnip skin, cherries, beetroots and more. The natural indicators will help individuals distinguish if it is a base or an acid.
