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Svetlanka [38]
3 years ago
14

Isotopes have

Chemistry
1 answer:
Feliz [49]3 years ago
7 0

Answer:

question 1 answer is b

Explanation:

istopes equal to same atomic number but different mass number

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<u>Given:</u>

Moles of He = 15

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<u>To determine:</u>

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<u>Explanation:</u>

From the ideal gas law:

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In this case we have:-

n(total) = 15 + 5 = 20 moles

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V = nRT/P = 20 moles * 0.0821 L-atm/mol-K * 300 K/1.01 atm = 487.7 L

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