already missed question so I just need help figuring out what I did. Small amounts of chlorine gas can be gener-

Question

ated in the laboratory from the reaction of
manganese(IV) oxide with hydrochloric acid:
4 HCl(aq) + MnO
2
(s)
→
2 H
2
O(
ℓ
) + MnCl
2
(s) + Cl
2
(g).
What mass of Cl
2
can be produced from 38
.
1 g
of MnO
2
with an excess of HCl(aq)?
Answer in units of g.
010 (part 2 of 3) 10.0 points
What volume of chlorine gas (of density 3.17
g/L) will be produced from the reaction of
381 mL of 0
.
36 M HCl(aq) with an excess of
MnO
2
?
Answer in units of L.
011 (part 3 of 3) 10.0 points
Suppose only 116 mL of chlorine gas was pro-
duced in the reaction in part two. What is
the percentage yield of the reaction?
Answer in units of %. I think the answer to part 3 is 1.4%. I just need to know if I finally figured out how to do it.