Question

Find the no.of moles in 19g of H2O2
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Answer 1

Atomic mass of H = 1.

Atomic mass of O = 16.

Molecular mass of H2O2= (2 × 1) + (2 × 16) = 34 gm.

Since 34 gm of hydrogen peroxide (H2O2) = 1 mole.

Hence 17 gm of H2O2 = 1/ 34 ×17 = 1/ 2 = 0.5moles.