I think is 5 because you use density is found by mass divide by volume.
The answers are
2, 3, and 5
Answer:
HE
Explanation:
HE is a noble gas
17.1 L
V1/T1=V2/T2
V2=(V1*T2)/T1
V2= (12.0L * 337K)/237K
V2=17.1L
it is an exothermic reaction
False