Question

How many moles of O2 are formed from 1.252 g of HgO?

Answer 1

• 2HgO—»2Hg+O_2

Moles of Hg

• Given mass/Molar mass
• 1.252/200.59
• 0.006mol

2 moles produce 1 mol O2

1 mol produces 1/2mol O_2

0.006 mol produces

• 0.006(0.5)
• 0.003mol