## HW E9 in textbook

rkang00
Posts: 69
Joined: Fri Sep 28, 2018 12:25 am

### HW E9 in textbook

Can molecules be calculated in moles as well? I thought moles only applied to atoms - or am I mistaken?

Nicholas Kull_3L
Posts: 30
Joined: Fri Sep 28, 2018 12:23 am

### Re: HW E9 in textbook

Atoms make up molecules. For example, you could have one molecule of water which is made up of 3 atoms ( 2 hydrogen and 1 oxygen). To calculate the number of moles you would take the amount of grams of the element divided by the molar mass of the element.

John_Richey_4A
Posts: 69
Joined: Fri Sep 28, 2018 12:27 am

### Re: HW E9 in textbook

Yes they can because every molecule has a molar mass that can be calculated, and thus needs to have a number of moles to calculate that.

Maya_Peterson1C
Posts: 62
Joined: Fri Sep 28, 2018 12:28 am

### Re: HW E9 in textbook

A mole is 6.022 x 10^23 units of something, whether it be particles, atoms, molecules, etc. So, for example, there should be 6.022 x 10^23 separate water molecules in one mole of H20. The characteristic that differentiates moles of different particles would be their mass.