Answer to Question #169098 in General Chemistry for Janiah Leslie

Question

how many grams of O2 must you have to produce 14.6 grams of H2O answwr

Answer 1

The equation for the reaction

O₂ + 2H₂ $\to$ 2H₂O

Moles of water used $=\dfrac{mass}{RMM} = \dfrac{14.6g}{18.01528g/mol}=0.81042mol$

Mole ratio of O2 : H2O = 1:2

Moles of O2$=\dfrac{1}{2}x0.81042 = 0.4052mol$

Mass of O2 = moles x MM

= 0.4052mol x 31.998 =12.966g