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What is the mass of 4.25 liters of N2 gas at STP? a3.91 grams b4.65 grams c4.96 grams d5.31 grams

User Freakent
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1 Answer

25 votes
25 votes

Step 1

It is known that under STP conditions:

1 mole of any gas (N2 in this case) = 22.4 L

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Step 2

Information provided:

4.25 liters of N2 at STP

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Step 3

Procedure:

4.25 L x (1 mole N2/22.4 L) = 0.19 moles of N2

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The number of moles = mass of N2/the molar mass of N2

(the molar mass of N2 = 28.0 g/mol)

Therefore,

The number of moles = mass of N2/28.0 g/mol

0.19 moles N2 x 28.0 g/mol = 5.32 g

Answer: 5.31 grams (the nearest option)

User Julius Babies
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