Answer to Question #150136 in Chemistry for bob

Question

A fuel tank used in a barbeque contains 1.09 x 10-1 moles of propane, C3H8(g). How many molecules of propane are in the tank?

Answer 1

Solution:

Moles of propane = 1.09×10^-1 moles = 0.109 moles

One mole of any substance contains 6.022×10²³ atoms/molecules.

Hence,

Number of propane molecules = 0.109 mol × (6.022×10²³ molecules / 1 mol) = 6.56×10²² molecules

Answer: 6.56×10²² molecules of propane are in the tank.