Answer:
To calculate the mass of
4.5
×
1
0
22
4.5×10
22
molecules of water (
�
2
�
H
2
O), you can use the molar mass of water. The molar mass of water is approximately 18 grams/mol.
Mass
=
Number of molecules
×
Molar mass
Mass=Number of molecules×Molar mass
Mass
=
4.5
×
1
0
22
molecules
×
18
g/mol
Mass=4.5×10
22
molecules×18g/mol
