Posted by Alejandra on .
A sample of C3H8 has 2.64 x 10^24 atoms.
How many carbon atoms does the sample contain?
What is the total mass of the sample?

CHEMISTRY 
bobpursley,
carbon atoms: if you are given the total atoms, then 3/11 of them must be carbon
total mass: mass=molemass*numberatoms/8*1/avagradronumber