Question

The molar mass of H2O is 18.01 g/mol . The molar mass of 02 is 32.00 g/mol What is the mass of H20 in grams,must react to produce 50.00 of 02

Answer 1

Option 4 : 56.28g

Step-by-step explanation:

2H2O ---> 2H2 + O2

Step 1: calculating moles O2

⇒For each mole O2 we have 2 moles of H2

1) (50.00g O2)/(32.00g/mol O2) = 1.563mol O2

⇒For each mole O2 we have 2 moles of H2, so we multiply moles of O2 by 2 to get moles of H2O

Step 2: Calculating moles H2O

2) (1.563mol O2)(2mol H2O/1mol O2) = 3.125mol H2O

Step 3: Calculating mass H2O

3. (3.125mol H2O) * (18.01g/mol H2O) = 56.28g H2O

We need 58.28g H2O to make 50.00g O2