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Amounts Of Substances In Equations (ht Only) (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Amounts Of Substances In Equations (ht Only)' 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

What is the mass of 1.00 mol of sodium atoms? (Ar Na = 22.99)
Calculate the empirical formula of a compound that contains 40.0% C, 6.7% H and 53.3% O by mass. (Use atomic masses C=12, H=1, O=16.)
30.0 cm3 of Si2H6 reacts with excess O2 according to 2 Si2H6 + 7 O2 ? 4 SiO2 + 6 H2O(g). If O2 in excess is 150 cm3, what is the total volume of gases present after the reaction (all volumes measured at same T & P)?
25.0 cm3 of 0.124 mol/dm3 Na2CO3 is neutralised by 23.6 cm3 of HNO3 (Na2CO3 + 2 HNO3 ? …). What is the concentration of HNO3? (give to 3 s.f.)
In a titration 25.00 cm3 of HCl is neutralised by 23.50 cm3 of 0.100 mol/dm3 Ba(OH)2. What is the concentration of HCl? (2 HCl + Ba(OH)2 ? BaCl2 + 2 H2O)
Calculate the moles of CO2 produced when 40.0 kg Fe2O3 reacts with excess carbon according to 2 Fe2O3 + 3 C ? 4 Fe + 3 CO2. (Mr Fe2O3 = 160; 1 mol gas = 24.0 dm3 but here moles requested)
What is the atom economy (to 3 s.f.) for the production of ZnCl2 in Zn + CuCl2 ? ZnCl2 + Cu? (Use relative formula masses: Zn 65.4, Cu 63.5, Cl 35.5)
A reaction has a maximum theoretical salt mass of 12.5 g. If the percentage yield is 92.8%, what mass of salt is actually produced?
Which volume corresponds to 375 moles of gas at RTP (1 mol = 24.0 dm3)?
The reaction: 2 A + 3 B ? 4 C. If you start with 0.500 mol A and an excess of B, how many moles of C can be formed?
Calculate the minimum mass of magnesium needed to reduce 1.20 kg of silicon dioxide according to: 2 Mg + SiO2 ? Si + 2 MgO. (Ar: Mg = 24)