In the reaction __h2 + o2 → 2h2o, what coefficient should be placed in front of h2 to balance the reaction?
select one:
a. 1
b. 2
c. 3
d. no coefficient is needed

22. a flask containing 450 ml of 0.50 m h2so4 was accidentally knocked to the floor. how many grams of nahco, do you need to put on the spill to neutralize the acid according to the following equation: h2so4(aq)+2 nahcos(aq) na,so(aq) +2 h20()+2 co2(g) d) 38 g a) 2.3 g b) 9.5 g c) 19 g