Question

Balance the equation and solve the problem.H₂O -> H₂ + O21.97mol of O2 are produced.What mass of water, H₂O, reacted?g

Answer 1

Step-by-step explanation:

Equation balanced:

2 H₂O -> 2 H₂ + O2

So if 1.97 mol of O2 is produced, it was needed 3.94 moles of H2O.

Let's transform to grams using the molar mass of water:

18 g --- 1 mol

x g --- 3.97 mol

x = 70.92 g

Answer: 70.92 g