Question

How many moles are in 2.00g of H2O​

Answer 1

.111 mole (using 3 significant digits)

Step-by-step explanation:

Mole weight of H2O = 2 x 1.008 + 15.999 = 18.015 gm/mole

2 gm / 18.015 gm/mole = .111 mole

Answer 2

n = m/M = 2/18 = 1/9 ~0,1 mol