How many grams of oxygen are in 40.1 g of calcium hydroxide?

options:

17.3 g
8.64 g
20.1 g
0.541 g
11.2 g

2 answers

moles in 40.1g Ca(OH)2 = 40.1/molar mass.
There are 2 moles oxygen atoms per mole of Ca(OH)2.
17.3 g