Which sample contains a total of 3.0 x 10^23 molecules? a) 14 grams of nitrogen gas
b) 14 grams of lithium
c) 4 grams of hydrogen gas
d) 4 grams of helium

Yes i think so not 100 percent sure though

Its a hope this

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.