Question

How many moles of CO2 are in 58.5 g of carbon dioxide?
4 points
2.72 mol CO2
1.07 mol CO2
3.42 mol CO2
1.83 mol CO2

Answer 1

Just divide 58.5 grams by the molar mass of CO2. Use the periodic table to find the masses of C and O

Molar mass of CO2 = 12.01(1) + 16(2) = 12.01+32 = 44.01 g/mol

mol of CO2 = 58.5g/44.01 g/mol = 1.329 mol = 1.33 mol with correct sig figs