Hydrogen and oxygen undergo a chemical reaction to form water. how much water would form if 2.56 g of hydrogen reacted completely with 20.32 g of oxygen? g

Explanation:

This looks like a limiting reactant problem.

We are given the masses of two reactants and asked to determine if we have enough to make a given amount of product.

1. Assemble the information

We will need a balanced equation with masses and molar masses, so let’s gather all the information in one place.  

M_r:           2.016       32.00    18.02

                   2H₂     +     O₂ ⟶ 2H₂O

Mass/g:      2.56        20.32  

2. Calculate the moles of each reactant

3. Calculate the moles of H₂O from each reactant

4. Calculate the mass of H₂O