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defon
3 years ago
14

Select the correct answer.

Chemistry
1 answer:
konstantin123 [22]3 years ago
6 0

Answer:

A.  not wearing goggles when breaking a rock with a hammer

Explanation:

You could get extremely hurt if you are not wearing goggles while doing lab work.

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The combustion reaction for methane is shown below:
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Answer:

P =  14.1 atm    

Explanation:

Given data:

Mass of methane = 64 g

pressure exerted by water vapors = ?

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Solution:

Chemical equation:

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Number of moles of methane:

Number of moles = mass / molar mass

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Now we will compare the moles of water vapors and methane.

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                 4            :         2/1×4 = 8 mol

Pressure of water vapors:

PV = nRT

R = general gas constant = 0.0821 atm.L/mol.K

P = 8 mol × 0.0821 atm.L/mol.K× 515 K / 24.0 L

P = 338.25 atm.L/ /  24.0 L

P =  14.1 atm      

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What is significant about the temperature absolute zero
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