Question

Part B What mass of carbon dioxide is produced from the complete combustion of 6.90×10−3 g of methane? Express your answer with the appropriate units.

Part C What mass of water is produced from the complete combustion of 6.90×10−3 g of methane? Express your answer with the appropriate units. Part D What mass of oxygen is needed for the complete combustion of 6.90×10−3 g of methane? Express your answer with the appropriate units   

Answer 1

Given : mass of methane = g.

The equation for the combustion of methane is as follows

CH4 + 2O2 CO2 + 2H2O

Moles of methane = mol

= mol

Part B:

One mole of methane on combustion produces one mole of CO2. So moles of methane will produce moles of CO2.

Molar mass of CO2 =

Mass of CO2 = mole of CO2 * molar mass of CO2

= g

= g

Therefore produced mass of CO2 will be g.

Part C:

One mole of methane on combustion produces two moles of H2O. So moles of methane will produce moles of H2O.

Molar mass of H2O =

Mass of H2O = mole of H2O * molar mass of H2O

= g

= g

Therefore produced mass of H2O will be g.

Part D:

One mole of methane needed two moles of O2 for complete combustion. So for moles of methane needed moles of O2 = .

Molar mass of O2 =

Mass of O2 = mole of O2 * molar mass of O2

= g

= g

Therefore needed mass of O2 will be g.