The following balanced equation shows the formation of water. 2H2 O2 → 2H2O How many moles of oxygen (O2) are required to react completely with 1. 67 mol H2? 0. 835 mol O2 1. 67 mol O2 3. 34 mol O2.

Which of the following reactions is endothermic? h2(g) + ½ o2(g) h2o(g), h = -57.82 kcal ½n2(g) + o2(g) + 8.1 kcal no2(g) ½ n2(g) + 3/2 h2(g) nh3(g) + 11.0 kcal c(diamond) + o2(g) co2, h = -94.50 kcal