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m_a_m_a [10]
3 years ago
5

30.) Use Percentages: According to the data in table above, what percentage of the energy used in the United States comes from f

ossil fuels?

Chemistry
2 answers:
STatiana [176]3 years ago
4 0

Answer:

im no expert i believe 42

hope it helps

Explanation:

Varvara68 [4.7K]3 years ago
4 0

Use Percentages: According to the data in table above, what percentage of the energy used in the United States comes from fossil fuels?

42!

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Which of the following actions would cause the volume of the chamber below to increase to 36.0 L?
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Option C. Triple the number of moles

Explanation:

From the ideal gas equation:

PV = nRT

Where:

P is the pressure

V is the volume

n is the number of mole

R is the gas constant

T is the absolute temperature.

Making V the subject of the above equation, we have:

PV = nRT

Divide both side by P

V = nRT / P

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Thus, the correct option is option C triple the number of moles. This can further be seen as illustrated below:

Initial volume (V1) = 12 L

Initial mole (n1) = 0.5 mole

Final mole (n2) = triple the initial mole = 3 × 0.5 = 1.5 mole

Final volume (V2) =?

From:

V = nRT / P, keeping T and P constant, we have:

V1/n1 = V2/n2

12/0.5 = V2/1.5

24 = V2/1.5

Cross multiply

V2 = 24 × 1.5

V2 = 36 L.

Thus Option C gives the correct answer to the question.

5 0
3 years ago
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