Question

10 billion oxygen molecules (1 x 10^10) is how many moles of molecular oxygen are there?

pls help 😭

Answer 1

1 mole of anything is 6.022 * 10^23 so you’d simply divide 10 ^ 10 by (6.022 * 10^23)

Answer 2

As a comparison:

A dozen is 12 of anything. Suppose I have 24 eggs. To find out how many dozens I have, I’d simply divide 24 eggs/12 = 2 dozens.

The same logic applies to mole, which is simply 6.022 * 10^23 instead of 12. 1 billion molecules / 6.022 * 10^23 = how many moles you have

Answer 3

Okay so, forgive me if I'm still misunderstanding here but I'd do 10^23 (10x23=230) and then divide 230 by 6.002?

Answer 4

(10^10) / (6.022 * 10^23)

It’s 10^10 divided by 6.022 and then again by 10^23

Answer 5

Ahh.

So 10^10(100) divided by 6.002 is 16.66 (but if rounded would be 16.67)
And 10^10(100) divided by 10^23(230) is 2300

Right?

Answer 6

^ means an exponent

10 ^ 10 would be 10 raised to the 10th power, not 10*10, same logic with 10^23

Answer 7

https://www.wolframalpha.com/input?i=10%5E10+%2F+%286.022+*+10%5E23%29

Answer 8

Oh 10 x 10 x 10 x 10 x 10 x 10 10 x 10 x 10 x 10 x 10 x 10 right?

Answer 9

Yes

Answer 10

Yay ok!