What is the mass in grams of 0.750 moles of #C_3H_8#?

1 Answer
Aug 26, 2017

Answer:

Well what is the mass of one mole of propane.....?

Explanation:

Well, it's #44.1*g#, and how did we get this?

We take the sum....#3xx12.011*g*mol^-1(C)+8xx1.00794*g*mol^-1 (H)#; from where did I get the atomic masses? Did I know them off the top of my head? Do you have to learn them?

We have got a #0.750*mol# quantity, and to get its mass we take the product......

#0.750*molxx44.1*g*mol^-1~=30*g#