Answer
The molar mass for $C_{18}H_{34}O_2$ is equal to 282.45 g/mole
Work Step by Step
Molar Mass ($C_{18}H_{34}O_2$):
$C: 12.01g * 18= 216.18g $
$H: 1.008g * 34= 34.272g $
$O: 16.00g * 2= 32.00g $
216.18g + 34.272g + 32.00g = 282.45g