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Conservation Of Mass And Balanced Chemical Equations (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Conservation Of Mass And Balanced Chemical Equations' from the broader topic Quantitative Chemistry. The test is geared towards the AQA exam board style syllabus.
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Below a typical questions that will be covered in this test. You final score will be logged on your account

If 2.00 g of hydrogen reacts with 16.0 g of oxygen to form water, which reactant is the limiting reagent? (Mr H2 = 2.0, O2 = 32.0)
An element X forms an oxide X2O3. If 2.00 g of X combine with 0.48 g oxygen, what is the relative atomic mass (Ar) of X (approx)?
Balance the redox equation by inspection: Fe2O3 + C ? Fe + CO. The coefficient for C is:
Which shows the correct mole ratio in the balanced equation: 2 Al + 3 Cl2 ? 2 AlCl3 ?
A reaction has a theoretical yield of 25.0 g of product. If the actual yield is 18.8 g, what is the percentage yield?
Which is the correct balanced equation for the combustion of methane?
A solution contains 0.100 mol of HCl in 250 cm3. What is the concentration in mol/dm3?
Which calculation gives the concentration (mol/dm3) if you have 0.0150 mol dissolved in 30.0 cm3 of solution?
What is the empirical formula of a compound that is 40.0% C, 6.7% H, 53.3% O by mass (approx)?
If 10.0 g of magnesium react with excess hydrochloric acid to form magnesium chloride and hydrogen, the mass of hydrogen produced (approximately) is closest to:
Calculate the relative formula mass (Mr) of calcium carbonate (CaCO3). (Ar Ca = 40.1, C = 12.0, O = 16.0)