Limiting Reactants (ht Only) (GCSE Chemistry)

A reaction’s theoretical yield is 12.0 g. The actual mass obtained is 9.00 g. What is the percentage yield?

A sample contains 5.85 g Fe and 8.00 g O2 which react to form Fe2O3 (4Fe + 3O2 ? 2Fe2O3). Which is the limiting reactant?

You have 28.0 g N2 and 6.00 g H2 reacting to form NH3 (N2 + 3H2 ? 2NH3). Which is limiting?

If 2.00 g Ca reacts with excess HCl to produce H2, what volume (cm3) of H2 at RTP (24 dm3 per mol) is produced? (Ca ? Ca2+ + 2e–, 2H+ + 2e– ? H2)

A mixture contains 0.200 mol A and 0.100 mol B reacting 2A + B ? products. Which is limiting?

An equilibrium mixture of brown NO2 and colourless N2O4 in a sealed syringe is compressed (pressure increased). After re-equilibration the mixture appears lighter in brown colour. Which statement matches this observation?

If you start with 5.00 mol H2 and 1.00 mol O2 for 2H2 + O2 ? 2H2O, which is limiting?

10.0 g CaCO3 ? CaO + CO2. What is the theoretical mass of CaO produced? (Ar: Ca 40.1, C 12.0, O 16.0)

Copper compound A (blue) ? copper compound B (yellow) + water. The green equilibrium mixture will become more yellow if you:

Which formula correctly gives atom economy?

25.0 cm3 of 0.100 mol/dm3 NaOH neutralises 40.0 cm3 of HCl. What is the concentration of the HCl?