The balanced chemical equation for the reaction of hydrogen and oxygen is shown below. 2H_(2)+O_(2)arrow 2H_(2)O The number of moles of hydrogen that is needed to produce 0.253 mol of water is smaller than 0.253 mol. much greater than 0253 mol. slightly greater than 0.253 mol. equal to 0.253 mol.

## Step1: Identify the mole ratio### From the balanced chemical equation, produce . Therefore, the mole ratio of to is 1:1.## Step2: Apply the mole ratio to find the moles of ### Since the ratio is 1:1, the number of moles of hydrogen needed to produce is equal to .#