Question

SAQ : At STP what is the volume of 7 g of nitrogen gas?

  • Mole Concept
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Answer

Question

At STP what is the volume of 7 g of nitrogen gas? [Ans. 5.6 L]

Answer

Step 1: Calculation of number of moles

moles of N2 = mass\ of\ N_2 \over molar\ mass\ of\ N_2

= 7 \over 28 = 0.25 mol

Step 2: Calculation of Volume

At STP, one mole of any ideal gas occupies 22.4 L. Therefore, the volume of 0.25 mol of nitrogen gas is:

volume of N2 = 0.25 × 22.4 = 5.6 L

Therefore, the volume of 7 g of nitrogen gas at STP is 5.6 L.

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