Question

Hydrogen and oxygen can form water, H2O, or hydrogen peroxide, H2O2. A chemist determined that a sample contains 20 g of hydrogen and 320g of oxygen. Is this sample water, or is it hydrogen peroxide?

Answer 1

Answer:

Hydrogen Peroxide

Explanation:

Moles = given mass/Molar mass

moles of hydrogen = 20/1 = 20 mol.

moles of oxygen = 320/16 = 20 mol.

In H2O, moles - H:O = 2:1

In H2O2, moles - H:O = 1:1

Here H:O = 1:1

Hence the sample is Hydrogen peroxide.