2.89
He
helium
Use what you know now to answer these questions.
40
L. COMGS
14. How many atoms are in 42.5 g of ammonia?
alo1
13. How many molecules are in 42.5 g of
ammonia?
NH3
14.01 + l,01(3) - 17,04g/mol
× 2,79mol
-1,50Y10° 事 atomo
6,022x103
2.49 mol
15.
How many Na* ions are in 4.8gofNa,SO,?
16. How many molecules are in 36.0 g of water?
H.0
1,20×101mol 1o1(2)1 16
Jomo
h
- 18.02g/ma)
YMA1O
Complete the following exercises to help you solidify your understand the utility of moles:
The conversion factor given in the back of your book is l amu= 1.66 × 10-27 kg.
kg
("kilograms per amu").
This can be written as
1.66 × 10-27
amu
1. Change this conversi
