it's true. answer is B.
a hypothesis is a stage before formation of theory. so when we put forward a hypothesis to prove something (in scientific observation) it can be proven true with the experiments conducted.
but of course it's can be proven wrong too, after the experiments conducted. then it is disregard.
a proven hypothesis (a true hypothesis)is the reason for theories.
Helium bc when u vape it goes into it lungs but also bringing helium at the same time.
Mass to mass: moles A x(mole ratio of B/A) and mass to mole: extract the data from the question
