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Tutor HuntTest QuestionsChemistry QuestionsYear 10 Chemistry Questions

 

Chemical Measurements (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Chemical Measurements' from the broader topic Quantitative Chemistry. The test is geared towards the AQA exam board style syllabus.
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What is the number of moles in 25.0 cm3 of a 0.100 mol/dm3 solution?
What is the percentage by mass of iron in Fe3O4? (Ar: Fe = 56.0; O = 16.0)
How many C70 molecules can be made from one mole of carbon atoms? (Avogadro’s constant = 6.02 × 10^23)
A sodium chloride solution has concentration 35.2 g/dm3. What is the concentration in mol/dm3? (Mr NaCl = 58.5)
A dye had Rf = 0.48 and the dye moved 5.4 cm from the start line. How far did the solvent front move?
A mean value is written as 16.5 ± 0.3 °C. What does “± 0.3 °C” most correctly represent?
For the Haber process: N2 + 3H2 ? 2NH3. What is the atom economy for producing ammonia (mass of desired product ÷ mass of reactants ×100)?
A solution of NaCl has concentration 0.602 mol/dm3. What mass (g) of NaCl is present in 0.500 dm3? (Mr NaCl = 58.5)
What percentage by mass of nitrogen is in ammonium nitrate, NH4NO3? (Ar: N = 14.0, H = 1.0, O = 16.0)
What is the molar volume (dm3) of 0.250 mol of gas at room temperature and pressure (1 mol = 24 dm3)?
What colour does universal indicator show in a strong alkali such as potassium hydroxide?