Answer
$Propane = C_{3}H_{8}$
Molar Mass of Propane = $(3*12) + (1*8) = 44 g/mol$
Number of moles in 167 grams of Propane = $\frac{167}{44} = 3.8$
Number of Hydrogen atoms in 3.8 moles = $3.8 * 8 * 6.022 * 10^{23} = 1.82 * 10^{25} atoms$
Work Step by Step
Calculate number of moles and then multiply the number of atoms.
