Question

At STP, how many molecules of nitrogen gas are in 224 L?

Responses

6.022×1022
6.022 times 10 to the power of 22

6.022×1023
6.022 times 10 to the power of 23

6.022×1024
6.022 times 10 to the power of 24

6.022×1025

Answer 1

224 L ÷ 22.4 L·mol⁻¹ = 10.0 mol.
10.0 mol × 6.022×10^23 molecules·mol⁻¹ = 6.022×10^24 molecules.

Correct choice: 6.022×10^24.