Question

How many moles of H20 are in 12.4 g H20?​

Answer 1

Answer:

12.4g of water has 0.689 moles of water.

Explanation:

Molar weight of $H_{2}O$ = 16 + 2 = 18g

One mole of $H_{2}O$ weighs 18g.

$18g\longrightarrow1\:mole\:of\:H_{2}O\\12.4g\longrightarrow\frac{12.4}{18}=0.689\:moles\:of\:H_{2}O$

Hence, 12.4g of water has 0.689 moles of water.