How many moles of H2O are produced when 25.6. grams of oxygen are used? Thank you

1.6mole of H2O

Explanation:

First let us generate a balanced equation for the reaction. This is illustrated below:

2H2 + O2 —> 2H2O

Molar Mass of O2 = 2 x 16 = 32g/mol.

Mass of O2 = 25.6g

Number of mole of O2 = Mass /Molar Mass

Number of mole of O2 = 25.6/32

Number of mole O2 = 0.8mol

From the equation,

1mole of O2 produced 2moles H2O.

Therefore, 0.8mol of O2 will produce = 0.8 x 2 = 1.6mole of H2O