A sample of C3H8 has 4.64 * 1024 H atoms. How many carbon atoms does the sample contain?

To calculate the number of carbon atoms in the sample of C3H8, the subscipts of the chemical formula is important since this gives the proportion of an element in a compound.

4.64 * 10^24 H atoms (3 atoms C / 8 atoms H) = 1.74 x 10^24 atoms C

In I molecule of C₃H₈, the ratio of Carbon to Hydrogen atoms = 3 : 8

C: H = 3:8

C : 4.64*10²⁴ = 3:8

C / (4.64*10²⁴) = 3 / 8

C = (3/8) * (4.64 * 10 ²⁴)

C = 1.74 * 10²⁴

The sample contains 1.74 * 10²⁴ C atoms.