## Chemistry 10th Edition

$Propane = C_{3}H_{8}$ 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 = $3.8 * 8 * 6.022 * 10^{23} = 1.82 * 10^{25} atoms$