The final temperature of the gas is 137°C at which it must be heated to occupy the volume of 557 ml.
Given,
V₁= 371ml
V₂ = 557 ml
T₁ = 0°C or 273 okay
We ought to locate the very last temperature of the fuel that must be heated.
as the cylinder is transferring freely, the pressure is equal to the outside pressure, i.e., 1 atm, beneath all situations.
consequently, by using the use of Charles regulation, we get
V₁ / T₁ = V₂ / T₂
where V₁ and V₂ are preliminary and very last volumes
and T₁ and T₂ are preliminary and very last temperatures (in Kelvin).
accordingly, the very last temperature is
T₂ = V₂ × T₁ / V₁
Or, T₂ = 557 x (zero+273) / 371
Or, T₂ = 410 okay
Or, T₂ = 137°C
consequently the final temperature is 137°C.
The physical principle known as Charles' law states that the volume of a gas equals a constant value multiplied by its temperature as measured on the Kelvin scale (zero Kelvin corresponds to -273.15 degrees Celsius)
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Rubidium lies below potassium in Group 1. Predict the approximate value for the melting point of rubidium. Give a reason for your answer.
Rubidium's valence shell electron, "(ns(1))," is more loosely bound than in potassium due to the larger atomic size of rubidium. As a result, Rubidium is found in Group 1 below potassium.
A valence shell electron is what?When an atom's outer shell is open, a valence electron, which is an electron attached to it, can take part in the creation of a chemical bond.
To form a shared pair in a single covalent bond, each atom in the bond contributes one valence electron.
an atom's valence shell electron, which is its outermost shell and which can be shared or transferred to another atom.
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In a phospholipid, the end of the molecule likely to face towards a nonpolar environment is ________________.
In a phospholipid, the end of the molecule likely to face towards a nonpolar environment is end with fatty acid chain.
Phospholipids are a group of polar lipids that consist of two fatty acids, a glycerol unit and a phosphate group which is esterified to an organic molecule such as choline, ethanolamine, inositol etc. phospholipids are composed of a phosphate group, two alcohols, and one or two fatty acids. on one end of the molecule are the phosphate group and one alcohol this end is polar, i.e. has an electric charge, and is attracted to water means hydrophilic. the other end, which consists of the fatty acids, is neutral it is hydrophobic and water insoluble.
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1. Eight atoms of carbon react with 18 atoms of hydrogen, forming only one molecule of CsHis. Is the
forming of only one molecule considered a violation of the law of conservation of mass? Explain.
Eight atoms of carbon react with 18 atoms of hydrogen , forming only one molecule of [tex]C_{8} H_{18[/tex] is considered as violation of the law of conservation of mass .
According to the law of mass conservation , neither chemical processes nor physical changes can create or destroy mass in an isolated system . The mass of the products and reactants of a chemical reaction must be equal, in accordance with the law of conservation of mass .
The reaction occur when eight atoms of carbon react with 18 atoms of hydrogen , forming only one molecule of [tex]C_{8} H_{18[/tex] is given as .
8C +18[tex]H_{2}[/tex] → [tex]C_{8} H_{18[/tex]
Mass of reactants = 8 × 12 + 18 × 2 = 132 g
Mass of reactants = 8 × 12 + 18 = 114 g
So , mass of reactant is not equal to the mass of product .
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How many kilograms are there in 50.0 lbs? (2.2 lbs = 1kg)
**Answer with 2 decimal places and no unit
Answer:
22.68
Explanation:
Since about 2.2 lbs = 1kg, 50 pounds is about 22.68.
What distance in kilometers can you drive if your car gets 14.00 kilometers per liter and you have 35.00 liters of gas?
2.5 km is the distance you can travel if a car gets 14 kilometers per liter and have 35 liters of gas.
Total distance traveled in 1 liter = 14 km
Total gas in the car = 35 liters
We have to find how much distance can be covered in in35 liters of gas.
Distance is the length of the path traveled between two points. It is the total movement of an object in a direction. It measures length.
Distance = 35/14
Or, distance = 2.5 km
Therefore, the total distance that can be covered by a car in 35 liters of gas is 2.5 km.
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If volume of a water sample is 11.3 ml and the mass is 11.349 g, what is the exact density of the sample?
The exact density of the water sample with volume 11.3ml and mass 11.349g is 1.004g/ml.
Density of a solution is defined as the ration of mass of the solution to the volume of the solution. Density is measured in g/cm³ for solids, g/ml for liquids, and g/L for gases.
As per the definition of density ,we can write
Density of solution = (Mass of the Solution / Volume of the solution)
Mass of the water sample = 11.349g
Volume of water sample = 11.3ml
Density of Water sample = (Mass of water sample/Volume of Water sample)
Density of Water sample = (11.349g / 11.3ml)
Density of Water sample = 1.004g/ml.
The exact density of the water sample with volume 11.3ml and mass 11.349g is 1.004g/ml.
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For the gauge that reads gauge pressure, does the pressure reading decrease, increase, or remain the same?
The pressure reading increases.
Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit vicinity over which that pressure is distributed. Gauge stress (also spelled gage pressure)[a] is the stress relative to the ambient pressure.
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A compound that occupies a receptor, but does not activate the neuron is known as a(n):___________
A compound that occupies a receptor, but does not activate the neuron is known as an antagonist.
What is a neurotransmitter receptor?
A neurotransmitter receptor (also known as a neuroreceptor) is a protein on the membrane that is activated by a neurotransmitter. Chemicals on the cell's surface, such as a neurotransmitter, can bind to the membrane, and receptors can be found along the membrane.
Is it true that the majority of neurotransmitter receptors are G-protein coupled?G-protein coupled receptors are found on the majority of neurotransmitter receptors. Neurotransmitter (NT) receptors can be found on the surface of neurons and glia. One neuron sends messages to the other neuron via neurotransmitters at a synapse.
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The hydrogens and oxygen of a water molecule are held together by ______ bonds. select all that apply.
The hydrogens and oxygen of a water molecule are held together by covalent bonds.
What are covalent bonds?A covalent bond is an electron exchange that causes the production of electron pairs between atoms. Covalent bonding is a stable equilibrium of the attractive and repulsive forces between two atoms that occurs when they share electrons.
Bonding pairs or sharing pairs are other names for these electron pairs. Because electrons are shared among several molecules, each atom can reach the equivalent of a full valence shell, resulting in a stable electronic state.
In organic chemistry, covalent bonds are much more common than ionic bonds. Covalent bonds unite the atoms in a single water molecule, whereas hydrogen bonds join two water molecules. Water develops a covalent bond when oxygen shares an electron with each hydrogen atom.
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A diploid parent cell with genes h, t, and q has a maternal genotype htq and paternal genotype htq. what would be the most likely daughter cell genotype if independent assortment does not occur?
HTQ would be the most likely daughter cell genotype if independent assortment does not occur.
What is a genotype?The genetic components that make up an organism's genotype. The term "genotype" also refers to the set of alleles or genetic variations that a person possesses within a certain gene or genetic region. How many alleles a person can have for a particular gene depends on ploidy, or the quantity of copies of each chromosome found in that species. Since humans are diploid (having two complete sets of chromosomes), each individual has two alleles for each gene. When both alleles are the same, the genotype is said to be homozygous. When there are two different alleles, the genotype is said to be heterozygous.The type of variant present at a specific locus (i.e., region) in the genome is scored by what is known as a genotype. Symbols can be used to symbolize it. For illustration, BB, Bb, and bb could be used to denote a certain gene variant.To know more about genotype, refer:
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Osmium has a density of 22.6g/cm3. what volume (in cm3) would be occupied by 21.8g of osmium?
a. 0.965
b. 1.04
c. 493
d. 2.03x10-3
e. 2.03x103
The osmium with a density of 22.6g/cm3 has a volume in cm3 of 0.965 cm3
The density formula and the procedure we will use is:
ρ = m/v
Where:
v= volumeρ= densitym= massInformation about the problem:
m= 21.8gρ= 22.6g/cm3v= ?Applying the density formula and isolating the volume (v), we get:
ρ = m/v
v = m / ρ
v = 21.8 g / 22.6g/cm3
v = 0.965 cm3
What is density?It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.
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Osmium has a density of 22.6 g/cm3. what volume (in cm3) would be occupied by a 21.8 g sample of osmium?
The volume occupied by a 21.8 g sample of osmium having a density of 22.6 g/cm3 is 0.965cm3.
The density formula is:
Density = mass/volume
To find volume:
Volume = mass/density
Now
mass = 21.8 g
density= 22.6 g/cm3
Putting the values
Volume = 21.8/22.6
volume = 0.965cm3
Thus the volume is 0.965cm3.
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The volume occupied of the sample of osmium with a density of 22.6 g/cm³ and a mass of 21.8 g is: 0.9646 cm³
The density formula and the procedure we will use is:
d = m/v
Where:
v= volumed= densitym= massInformation about the problem:
d= 22.6 g/cm³m = 21.8 gv = ?Applying the density formula and clearing the volume we get:
d = m/v
v = m/ d
v = 21.8 g / 22.6 g/cm³
v = 0.9646 cm³
What is density?It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.
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Which activity is the best demonstration of J.J. Thomson's use of creativity in his work?
Answer:
Thomson used creativity to interpret the results of the cathode ray tube experiment. Explain how the atomic theory was modified from Dalton's theory to Rutherford's.
How much agco is formed when 25.0 ml of 0.200 m agno is mixed with 50.0 ml of 0.800 m naco?
The Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] is formed when 25.0 ml of 0.200M AgNO[tex]_{3}[/tex] is mixed with 50.0 ml of 0.800 M Na[tex]_{2}[/tex]CO[tex]_{3}[/tex] is 0.68 g.
According the question , the chemical equation is give by :
2AgNO[tex]_{3}[/tex] + Na[tex]_{2}[/tex]CO[tex]_{3}[/tex] -------> Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] + 2NaNO[tex]_{3}[/tex]
Given that :
volume of silver nitrate = 25.0 ml or 0.025 L
molarity M = 0.200 M
volume of sodium carbonate = 50.0 ml or 0.050 L
molarity = 0.800 M
now, no. of moles of silver nitrate = 0.025 × 0.200 = 0.005 moles
no. of mole of sodium carbonate = 0.050 × 0.800 = 0.04 moles
the no. of moles of silver carbonate , = 0.5 × 0.005
= 0.0025 moles
molar mass of Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] = 275.7 g/mol
therefor, the mass of Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] = 0.0025 moles × 275.7 g/mol
=0.68 g
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Q21 90g of glucose is dissolved in water. The glucose solution is fermented. C6H12O62CO₂ + 2C₂H₂OH glucose, M, = 180 After the fermentation finishes, 6.8g of ethanol is obtained from the solution. What is the percentage yield of ethanol? A 7.4 B 7.6 C 14.8 ethanol, M, = 46 D 29.6
The correct answer is 14.8%.
The given reaction,
C_6H_12O_6 ----> 2CO₂ + 2C₂H₂OH
A key idea in chemistry is stoichiometry, which determines the quantity of reactants or products in a chemical reaction and aids in understanding different reactions and the proportions in which they might take place. A combination of two Greek terms is stoichiometry. Stoicheion, which denotes an element, and metron, which denotes a unit of measurement
mole= mass/mole mass
=90g/180g/mol
=0.5mol
According to stoichiometry
1 mol glucose = 2 mol ethanol
0.5 mol C_6H_12O_6 = 1 mole ethanol
mass of ethanol = 1 mole ×46 g/ mol
Theoretical yield = 46 g
percentage = actual yield / theoretical yield × 100
=6.8 g / 46 g × 100 = 14.78% =14.8%
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Which of the following chemicals does not occur naturally?
Answer:
Explanation:
O2
O Macmillan Learning
A hydrate of cobalt(II) chloride had a mass of 238.0 g before heating. After heating, the anhydrous CoC1, weighed 130.7 g.
What is the mass of the water that was removed by heating?
mass of the water =
How many moles of water were removed by heating?
moles of the water =
How many moles of anhydrous CoCl, remain?
moles of CoCl₂ =
What is the hydration number (moles of water per mole of compound)?
hydration number=
mol
mol
A hydrate of cobalt(II) chloride had a mass of 238.0 g before heating. After heating, the anhydrous CoC1, weighed 130.7 g.
from above statement, we found that,
before heating cobalt(II) chloride = 238.0g
Mass of hydrated cobalt(II) chloride After heating = 130.7 g
Mass of water = (1238.0 - 130.7) g = 107.39g
moles H2O = 107.39× 1 mole H2O÷18g H2O
= 5.96 mol H2O.
moles of anhydrous CoCl, remain = given mass of CoCl÷ molar mass of CoCl
=130÷94.5
= 1.375 mole
moles of CoCl₂ = given mass of CoCl₂÷ molar mass of CoCl₂
= 130÷ 130
= 1 mole.
hydration number = moles of water÷ mole of compound
= 5.96 mol÷ 1
= 5.96 hydration number
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The reduction of a molecule can sometimes result in the acquisition of a proton, a reaction referred to as:______.
The reduction of a molecule can sometimes result in the acquisition of a proton, a reaction referred to as hydrogenation.
What is hydrogenation?
Molecular hydrogen (H2) and another substance or element undergo a chemical reaction known as hydrogenation, typically in the presence of a catalyst such as nickel, palladium, or platinum. The method is frequently used to saturate or decrease organic molecules.
To turn an oil that is liquid into a solid fat. Hydrogenation, sometimes in conjunction with other procedures like interesterification or fractionation, may offer a technique to manufacture the needed fat when solid fats of the proper consistency are expensive or unavailable.
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Suppose you stir a little baking soda into water until the water looks clear again. how could you prove to someone that the clear material is a mixture and not a compound?
To prove to someone that the clear material is a mixture and not a compound, you could put the solution in a cup and then let the water evaporate. The baking soda will stay in the cup.
What is baking soda?Baking soda is a NaHCO₃. Its chemical name of sodium bicarbonate. It is a salt of carbonates. It is used in making dishes. This is used to make cakes or other fermented foods.
Thus, you may put the solution in a cup and then let the water evaporate to demonstrate to someone that the clear substance is a mixture rather than a compound. The cup will hold the baking soda.
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When a liquid changes to a solid
what happens to it's density?
Answer:
When a liquid is remained a liquid the the particles are loose but as the liquid turns into solid the particle get more compact and closer together. So in that case the liquid will have lower density.
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How many grams of phosphorus are present in 3.51 moles of phosphorus trichloride ? grams.
108.81 grams of phosphorus are present in 3.51 moles of phosphorus trichloride, PCl₃.
The molecular formula of Phosphorus trichloride is PCl₃.
One mole of phosphorus trichloride contains one mole of phosphorus element.
The molar mass of phosphorus = 31 g.
So,
1 mole of phosphorus trichloride contains 31 g of phosphorus
Since,
1 mole PCl₃ has 31 g Phosphorus
1 × 3.51 moles PCl₃ has 31×3.51 g Phosphorus
3.51 moles PCl₃ has 108.81 g of Phosphorus
Hence,
3.51 moles of phosphorus trichloride have 108.81 grams of phosphorus present in it.
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What is the correct symbol for an ion containing 24 protons, 27 neutrons, and 21 electrons?
The appropriate designation for an ion with 24 protons, 27 neutrons, and 21 electrons is [^51 Cr24].
How to represent an atom with atomic number and mass?
The smallest component of ordinary stuff that makes up a chemical element is an atom. Each neutral or ionized atom makes up a solid, liquid, gas, or type of plasma. Atoms are very small, with an average diameter of 100 picometers.
Symbolical representation is :
[ Xz^A] or [^A Xz]
Where,
A = Mass , X = atom, Z = Atomic number.
The quantity of protons and neutrons in an atom's nucleus is referred to as its mass number.
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Suppose you heat a 4. 31 g sample of a n a 2 c o 3 hydrate. After thorough heating, the mass of the compound is 3. 22 g. Based on the data, what is the formula for the hydrate you started with?.
Suppose we heat a 4. 31 g sample of a Na2Co3 hydrate. after thorough heating, the mass of the compound is 3. 22 g based on the data, Na₂CO₃ • 2H₂O for the hydrate we start with this formula.
Here compound are Na₂Co₃ then mass of compound is 3.22g and molar mass is 105.98g/mol
Moles of compound (anhydrate Na₂CO₃) = mass / molar mass = 3.22 g / 105.98 g mol = 0.0304 mol mass
So here compound Na₂Co₃ are given and we start with formula Na₂CO₃ • 2H₂O for the hydrate.
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What is the molarity of a solution prepared by dissolving 3.50 mol nacl in enough water to make 1.50 l of solution?
Molarity of a solution prepared by dissolving 3.50 mol nacl in enough water to make 1.50 l of solution is 2.33 mol /L
What is Molarity?Molarity is a physical quantity that describes the substance's number of moles available in the unit liter volume of the solution. A mole per liter is a measurable unit to explain molarity.
Number of moles of the NaCl is
np = 3.50 mol
The volume of the solution is np = 1.50 L
The expression for the molarity solution is cm = np/vp
At the value and get the above expression
Cm = 3.50/ 1.50
= 2.33 mol /L
Thus the molarity of the solution is 2.33 mol /L
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Select the correct metal. martina has a sample of an unknown substance. she measures the substance. its mass is 13.5 grams, and its volume is 5 cm3. which metal might her sample be made of?
Correct metal is aluminum
Martina has a sample of an unknown substance she measures the substance. its mass is 13.5 grams, and its volume is 5 cm³ so here density concept is seen.
Density = mass/volume
So 13.5/5 = 2.7
This density is same as aluminum that's why this metal is aluminum.
Aluminum is a chemical element with the symbol Al and atomic number 13 aluminum is a silvery-white, lightweight metal. It is soft and malleable. aluminum is used in a huge variety of products including cans, foils, kitchen utensils.
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Answer:Aluminum
Explanation:
a 60kg sack of the rice is lifeted with a 30n force what its acceleration
given:
uknow:
formula:
solution:
A 2.760 g sample of carbon was burned, yielding 10.120 g of carbon dioxide. how many grams of oxygen was taken up by the reaction? 10.73 g 4.258 g 8.80 g 7.360 g 6.257 g
If a 2.760 g sample of carbon was burned, yielding 10.120 g of carbon dioxide, the grams of oxygen taken up by the reaction was 7.360 g
The balanced equation of chemical reaction is :
C + O₂ → CO₂
Given data is-
Given mass of Carbon- 2.760 g
Amount of carbon dioxide produced- 10.120 g
The molecular mass of carbon dioxide = 44.0 g/mole
To calculate number of moles, equation used is,
Number of moles (n) = Given mass
Molar mass
n = 10.120 g
44.0 g/mole
= 0.23 moles
So, The number of moles of oxygen produced is,
number of moles of O₂ = number of moles of CO₂
n = 0.23 moles.
Now, the molecular mass of oxygen is,
M = (2 × 16.0)g/mole = 32.0 g/mole
Mass of product = number of moles × molecular mass
m = (0.23 × 32.0) g
m = 7.360 g
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Suppose that the gene for a protein 500 amino acids in length undergoes a mutation. if the mutation causes the synthesis of a mutant protein in which just one of the 500 amino acids is:__________
Suppose that the gene for a protein 500 amino acids in length undergoes a mutation. If the mutation causes the synthesis of a mutant protein in which just one of the 500 amino acids is incorrect.
What is mutation?
The mutation is a condition in which there are changes in the DNA and gene. These changes are due to genetic mutation and other bio factors and radiation.
The protein may be folded incorrectly. And the protein will not attain its old structure. Because denature is an irreversible process and does not get the structure of its before.
Thus, the statement is incorrect.
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A student in a lab holds an iron nail over an open flame, and no reaction occurs. The nail is then filed, creating small pieces of iron shavings. These pieces burn brightly when placed over an open flame. Which statement accurately identifies one of the changes that occurs as a physical or chemical change?
A. Burning the iron filings is a chemical change because the composition of the material does not change but the general appearance of the iron does change.
B. Burning the iron filings is a physical change because the composition of the material does not change but the general appearance of the iron does change.
C. Filing the nail is a chemical change because the composition of the material does not change but the general appearance of the iron does change.
D. Filing the nail is a physical change because the composition of the material does not change but the general appearance of the iron does change.
PLEASE HELP ITS URGENT 20 POINTS!!!!!!!!!!!!!!!!!!!!!!!
While burning iron shavings results in a chemical change, the formation of little particles of iron shavings is a physical change.
Small bits of iron shavings being formed are an example of a physical change because they can be transformed back into nails, whereas small pieces of iron shavings being burned on a flame are an example of a chemical change since they cannot be transformed back into their original shape. Chemical change is a change in matter that modifies the chemical properties of the substance as opposed to physical change, which modifies the matter's physical characteristics.
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A chemist measures the amount of mercury in sediment samples from three areas of a river (the source, the midway point, and the
mouth).
Which is the most reasonable hypothesis for the chemist's experiment?
If a chemical plant near the source of the river is dumping mercury, then the mercury levels should be highest at the mouth
and lowest at the source.
If a chemical plant near the source of the river is dumping mercury, then the mercury levels should be highest at the mouth
and lowest at the midway point.
If a chemical plant near the source of the river is dumping mercury, then the mercury levels should be the same all along
the river.
If a chemical plant near the source of the river is dumping mercury, then the mercury levels should be highest at the
source and lowest at the mouth.
If a chemical plant near the source of the river is dumping mercury, then the mercury levels should be highest at the source and lowest at the mouth.
Further testing should show that this is a commonly followed rule. Observations should be explained in a published scientific paper. Scientists look for answers to questions and solutions to problems using a process called the scientific method. This process consists of observation, hypothesis development, and experimental design. Bringing additional observations hypotheses, and experiments in repeated cycles
Chemists use the scientific method to conduct experiments formulate hypotheses formulate laws, and develop theories to better understand how the natural world behaves. In scientific thinking, hypotheses are formed before applicable research is conducted. The theory, on the other hand, is supported by evidence. This is a principle formulated as an attempt to explain what the data already support.
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