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Atom Economy (chemistry Only) (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Atom Economy (chemistry 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

A reaction gives desired product mass 88 g and total product mass 112 g. What mass of waste is produced and what is the atom economy?
Which of the following reactions has the best atom economy for producing water as the desired product?
Which of the following is a correct statement linking atom economy and sustainability?
For the reaction CaCO3 + 2HCl ? CaCl2 + CO2 + H2O, calculate the atom economy for the desired product CaCl2. (Use Ar: Ca = 40, C = 12, O = 16, Cl = 35.5.)
For the reaction: 2A ? desired product + B (where B is waste), a chemist increases atom economy by:
Which of the following best explains why atom economy is different from percentage yield?
Calculate the atom economy for the reaction N2 + 3H2 ? 2NH3.
Calculate the atom economy for the production of sulfur dioxide from sulfur burning: S + O2 ? SO2. (Use Ar: S = 32, O = 16.)
For the reaction CH4 + 2O2 ? CO2 + 2H2O, what is the atom economy for carbon dioxide as the desired product? (Use Ar: C = 12, O = 16, H = 1.)
For the reaction Na2CO3 + 2HCl ? 2NaCl + CO2 + H2O, calculate the atom economy for the desired product 2NaCl. (Use Ar: Na = 23, C = 12, O = 16, Cl = 35.5.)
A chemist reports an atom economy of 95% for producing a fine chemical. Which of the following is a realistic implication?