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Nezavi [6.7K]
3 years ago
12

Which of the following is not true regarding gases? A. When the temp of a gas decreases its volume increases if the pressure is

held constant. B. Equal volumes of gases at the same temp and pressure contain the same numbers of molecules C. The molecules of gas are in constant motion.
Chemistry
1 answer:
iVinArrow [24]3 years ago
6 0
The answer is B, since some gas molecules are much larger than others.
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The combustion of ethane is expressed in the balanced reaction C2H6 + 3.5O2= 2CO2 + 3 H2O. Given the mass of oxygen gas, we get the moles of ethane needed by converting this mass to mole (dividing my 32 g/mol), then multiply by 1/3.5 (stioch ratio) and the molar mass of ethane (30 g/mol). The answer is 16.69 grams ethane. 
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Why will paper stick to a ballon that you have rubbed on your hair?
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4 years ago
Which list correctly orders the states of matter from least to most kinetic energy?(1 point)
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3 years ago
What are the basis of making symbols????​
telo118 [61]

Answer:

1/ Using the first letter of the name of the elements.

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4 0
4 years ago
Under certain conditions, the substance calcium carbonate can be broken down to form calcium oxide and carbon dioxide. If 31.7 g
klio [65]

Answer:

13.93\ \text{g}

Explanation:

Molecular weight of CaCO_3 = 100.0869 g/mol

Mass of CaCO_3 = 31.7 g

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The mass of carbon dioxide formed simultaneously is 13.93\ \text{g}.

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