Answer:
Helium has many unique properties: low boiling point, low density, low solubility, high thermal conductivity and inertness, so it is use for any application which can exploit these properties. Helium was the first gas used for filling balloons and dirigibles.
Matter cannot be created or destroyed so it doesn't create matter, but it does gain mass
Rna is a cells singal identity, while dna defines a person. Tell me if i am incorect
