Question: how many atoms of hydrogen are present in 2.92 g of water?
Answer: Answer Expert Verified So in 2.92 grams there are 2.92/18.01528 = 0.1621 mol of particles. 1 mol contains 6,02214 × 10^23 particles by definition. So the nr of H2O molecules is 0.1621 * 6,02214 × 10^23 = 0,9761 × 10^23.