How many carbon atoms are in 44g C3H8?

Answer 1

C₃H₈ has a molar mass calculated as follows:

Carbon: 12.011 x 3 = 36.033 g/mol

Hydrogen: 1.008 x 8 = 8.064 g/mol

36.033 + 8.064 = 44.097 g/mol

The number of moles of C₃H₈ is calculated by dividing 44g and the 44.097 g/mol to get 0.9978 moles.

Each mole of C₃H₈ has 6.022 x 10²³ molecules in it so there are (0.9978)(6.022 x 10²³) = 6.00889 x 10²³ molecules of C₃H₈ and each one has 3 atoms of carbon in it so the number of atoms of carbon is:

(3)(6.00889 x 10²³) = 1.8 x 10²⁴ atoms