What information does the percent composition of an atom in a molecule give?

A. The relative number of atoms one element contributes to a
molecule

B. The relative amount of mass an atom contributes to a molecule

C. The total number of atoms of that element in a molecule

D. The total mass that element contributes to a molecule

what is the volume occupied by 40 grams of argon gas (ar) at standard conditions? what volume, in liters, is occupied by 1.5 x 1023 

the answer is na (sodium)

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.

the answer is c

tell me if wrong