Question

#22.) In the reaction 2CO(g) + O2(g) → 2CO2(g), what is the ratio of moles of oxygen used to moles of CO2 produced?

Select one:
a. 1:1
b. 2:1
c. 1:2
d. 2:2

#23.) According to this chemical reaction, which is the number of grams of Fe produced from 3.4 moles of H2?
Fe3O4 (cr) + 4 H2 (g) → 3 Fe (cr) + 4 H2O (l)

Select one:
a. 142
b. 253
c. 102
d. 91.4

#24.) For the reaction 2Na + Cl2 → 2NaCl, how many grams of chlorine gas are required to react completely with 111.9 mol of sodium?

Select one:
a. 3970
b. 7930
c. 1.59e4
d. 2640

Answer 1

For number 22. The answer is c. To find this look at the numbers before each compound O2 has no number which means 1, while CO2 has a 2 in front