It is necessary to know the
molar mass of each element
of carbon dioxide (CO2). We can find
that information on the Periodic Table of
Elements:
- Carbon atomic mass: 12 g/mol
- Oxygen atomic mass: 16 g/mol
2nd)
We need to calculate the
molar mass of carbon dioxide
. As the molecule of CO2 has 1 mole of
carbon and 2 moles of oxygens, the
molar mass of the molcule is:
(1 x 12g/mol) + (2 x 16 g/mol) = 44 g/mol
3rd)
Finally, if 1 molecule of dioxide carbon
has 12g of carbon, we can use a
mathematical Rule of Tree to calculate
mow many grams of carbon are in
0.688g of carbon dioxide:
12gC - 44gC02
0.699gC • 44gC02
12gC
1 = 2.52gC02
SO,
there are 2.52g of carbon in 0.688g of
carbon dioxide
