First, convert mg to g, so that 6 mg = 0.006 g, to determine how many moles are in 6 mg.
Next, divide 0.006g by the carbon molar mass:
(0.006 g) / (12 g/mol) = 0.0005 mol
We can determine the number of carbon atoms in 0.0005 mol since one mole of carbon contains 6.02 x 1023 carbon atoms:
0.0005 mol x 6.02 x 1023 atoms/mol = 3.01 x 1020 atoms.
In summary, 3.01 x 1020, which both indicate the number of carbon atoms in 6 mg of graphite, are the right answers.
First, convert mg to g, so that 6 mg = 0.006 g, to determine how many moles are in 6 mg.
Next, divide 0.006g by the carbon molar mass:
(0.006 g) / (12 g/mol) = 0.0005 mol
We can determine the number of carbon atoms in 0.0005 mol since one mole of carbon contains 6.02 x 1023 carbon atoms:
0.0005 mol x 6.02 x 1023 atoms/mol = 3.01 x 1020 atoms.
In summary, 3.01 x 1020, which both indicate the number of carbon atoms in 6 mg of graphite, are the right answers.