Astudent is examining the gas inside a helium balloon. If the gas composed of only helium atoms what can the student.conclude
A. The gas is a pure substance because it is made up of one type of element
B. The gas is a pure substance because it is made up of mixtures.
C.The gas is an impure substance because it is inside a balloon
D.The gas is an impure substance because it's ima gaseous state