Hydrogen gas is colorless, odorless, and highly flammable. You can safely test for small quantities of hydrogen like those collected in Experiments 1 and 2 by placing a burning
wooden splint near the opening of a gas collection tube. The positive result is a squeaky
pop sound as hydrogen reacts with oxygen in a small explosion. Given the following
balanced chemical equation for the "pop test", how many moles of O2 will react with 12
moles of hydrogen?
2H2 + O2 → 2H2O
A
3 mol
B
6 mol
С
12 mol
D
24 mol

its not a choice. you dont choose if you want to be gay or straight.

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o