Question

In a chemical reaction that yields 103-g of H2O2. 50 grams of of hydrogen were reacted with ______-g of oxygen?

Answer 1

Answer:

96.8993 g

Explanation:

balanced reaction to produce H2O2 is:

H2 + O2 ---> H2O2

number of moles of H2O2 formed = mass / molar mass = 103 g /(34.0147 g/mol) = 3.0281 mol

number of moles of H2 reacts = 50 g / (2 g/mol) = 25 mol

since only 3.0281 Moles of H2O2 forming and according to balanced reaction one mol of each H2 and O2 will reacts to form one mol of H2O2.

=> moles of O2 were react = mol of H2O2 formed

=> moles of O2 were react = 3.0281 mol

since mass = moles × molar mass

=> mass of O2 were react = 3.0281 mol × 32 g/mol = 96.8993 g

So answer is 96.8993 g

Thank you!