Hey guys I need help with my chemistry homework?

Question

How many molecules are in 2.00 x ^10-2 moles of carbon tetrachloride, CCI4?(Molar mass=153.81 g/mol)

Answer 1

Hi!

If you have 0.02 moles of CCl4 and CCl4 is 153.81 g/mole you should be able to look at your units and determine if you need to multiply or divide them together.

A similar analysis would be for the following: How far did you travel if you were traveling 3 hours at 60 miles/hour. 3 x 60 = 180 and the units are hours x miles/hour. Hour cancels with hour and you are left with miles for your units on 180.