How many molecules of h2O are in 1.7 moles of H2O

A) 1.02x10^24

B) 30.6

C) 2.7x10-24

D) 38.1

From the Avogadro's law one mole of a substance contains 6.022 * 10^23 particles.

Therefore; 1 mole of water contains 6.022 * 10^23 molecules

Hence 1.7 moles will contain;

1.7 * 6.022 * 10^23 molecules

= 10.2374 * 10^23 molecules

= 1.024 * 10^24 molecules

≈ 1.02 * 10^24 molecules