1) List the known and unknown quantities.
Sample: CH5N
Molecular mass: 31.0571 g/mol.
Mass: 1.0 g
Avogadro's number: 6.022*10^23
2) Convert the mass of CH5N to moles of CH5N.
[tex]mol\text{ }CH_5N=1.0\text{ }g\text{ }CH_5N*\frac{1\text{ }mol\text{ }CH_5N}{31.0571\text{ }g\text{ }CH_5N}=0.0321988\text{ }mol\text{ }CH_5N[/tex]
3) Convert moles of CH5N to molecules of CH5N.
[tex]molecules\text{ }CH_5N=0.0321988\text{ }mol\text{ }CH_5N*\frac{6.022*10^{23}\text{ }molecules\text{ }CH_5N}{1\text{ }mol\text{ }CH_5N}=1.93901*10^{22}\text{ }molecules\text{ }CH_5N[/tex]
4) Convert molecules of CH5N to carbon atoms.
There is one carbon atom in every molecule of CH5N.
[tex]C\text{ }atoms=1.93901*10^{22}\text{ }molecules\text{ }CH_5N*\frac{1\text{ }carbon\text{ }atom}{1\text{ }molecule\text{ }CH_5N}=1.93901*10^{22}\text{ }carbon\text{ }atoms[/tex]
There are 1.9*10^22 carbon atoms in the sample.
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