- #1
Sace Ver
- 79
- 2
Homework Statement
A sample contains 2.5x1020 formula units of CuSO4•5H2O...
a) calculate the number of moles present in this sample
b) calculate the mass of this sample
N=2.5x1020
M=249.69g/mol
2. Homework Equations
n=N/Na
m=nM
The Attempt at a Solution
a)
n=N/Na
n=2.5x1020/6.02x1023
n=0.000415mol
b)
m=nM
m=(0.000415mol)(249.69g/mol)
m=0.10369g
Am I correct?