A calcium carbonate sample reacts with dilute hydrochloric acid at room temperature and pressure (RTP) to produce 72 cm372\text{ cm}^372 cm3 of carbon dioxide gas, CO2\text{CO}_2CO2.
Calculate the number of moles of carbon dioxide gas produced. (One mole of any gas occupies 24 dm324\text{ dm}^324 dm3 or 24,000 cm324,000\text{ cm}^324,000 cm3 at RTP).
Use your answer to (a) to calculate the mass of carbon dioxide gas produced (relative formula mass of CO2=44.0\text{CO}_2 = 44.0CO2=44.0).
Aluminium metal, Al\text{Al}Al, reacts with copper(II) sulfate solution, CuSO4\text{CuSO}_4CuSO4. Solid copper, Cu\text{Cu}Cu, is formed.
Two possible balanced equations for this reaction are:
In an experiment, 1.080 g1.080\text{ g}1.080 g of aluminium reacts with excess copper(II) sulfate solution to make 3.810 g3.810\text{ g}3.810 g of copper.
Deduce which equation represents the reaction that takes place. (Relative atomic masses: Ar(Al)=27.0A_r(\text{Al}) = 27.0Ar(Al)=27.0, Ar(Cu)=63.5A_r(\text{Cu}) = 63.5Ar(Cu)=63.5)