Limiting Reactants (ht Only) (GCSE Chemistry)

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?

At room conditions 1 mole of gas occupies 24 dm3. How many dm3 are produced by 0.5 mol CO2?

A student mixes 0.100 mol HI(g) in a system at equilibrium for 2HI ? H2 + I2. What effect would increasing the pressure have on the equilibrium position?

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

Given A + 2B ? C, if you start with 0.50 mol A and 1.00 mol B, which statement is correct?

If 10.0 g sodium reacts with 10.0 g chlorine gas (Cl2) to produce NaCl (2Na + Cl2 ? 2NaCl), what mass of NaCl is produced (to 3 s.f.)?

2.50 g Mg reacts with 6.40 g HCl (molar mass 36.5) and HCl is limiting. What is the mass of MgCl2 formed (closest)? (MgCl2 Mr ˜ 95.2)

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

Gas volume question: 0.125 mol of gas at RTP occupies how many dm3?

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

2.00 g H2 reacts with 32.00 g O2 to form water (2H2 + O2 ? 2H2O). What mass of water is formed?