Answer:
1.01 moles (3 s.f.)
Step-by-step explanation:
Number of moles= mass ÷Mr
*Mr stands for relative molecular mass and can be calculated from the periodic table
Mr of H₂O₂
= 2(1) +2(16)
= 2 +32
= 34
Number of moles
= 34.24 ÷34
= 1.01 moles (3 s.f.)