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Grade 10 · Chemistry

Grade 10 Chemistry diagnostic

14 questions on general chemistry, chemical reactions, acids, bases & ph, analytical chemistry, physical chemistry, organic chemistry and biochemistry. Answer what you can, then check your answers to see which topics are secure and what to practise next.

14 questions7 topicsAbout 15 minutesSet 2 of 5

Skip a question if you do not know the answer. It is better than guessing, because it shows what to practise.

1General chemistryA model sample has mass 192 g and stated molar mass 145 g/mol. Find its amount. Round to 3 decimal places if needed. Answer in mol.
mol
2General chemistryA sample contains 3.5 mol and has stated molar mass 44 g/mol. Find its mass. Round to 3 decimal places if needed. Answer in g.
g
3Chemical reactionsIn a sealed container, 20.4 g of A and 25.1 g of B react until B is used up. 16.3 g of A is left over, and the only product is C. What mass of C forms?
g
4Chemical reactionsClassify this reaction: N₂ + 3 H₂ → 2 NH₃
5Acids, bases & pHHow many times greater is the hydrogen-ion concentration in a solution of pH 10 than in a solution of pH 13?
6Acids, bases & pHSolution X has pH 6 and solution Y has pH 8. Which is more acidic?
7Analytical chemistryIn the supplied complete neutralization equation H₂A + 2OH⁻ → A²⁻ + 2H₂O, how much OH⁻ reacts with 0.61 mol H₂A? Round to 3 decimal places if needed. Answer in mol.
mol
8Analytical chemistryA 188 g sample is 38% desired substance by mass. Find the desired substance mass. Round to 3 decimal places if needed. Answer in g.
g
9Physical chemistryFor one reaction as written, a bond model requires 507 kJ/mol to break bonds and releases 873 kJ/mol on forming bonds. Estimate ΔH. Round to 3 decimal places if needed. Answer in kJ/mol.
kJ/mol
10Physical chemistryUse PV = nRT and R = 8.314 kPa·L/(mol·K). Find the ideal-gas volume for 1.7 mol at 273 K and 115 kPa. Round to 3 decimal places if needed. Answer in L.
L
11Organic chemistryIgnoring end groups in a supplied model, a polymer chain has 80 repeat units, each contributing 28 g/mol to the chain molar mass. Estimate that mass. Round to 3 decimal places if needed. Answer in g/mol.
g/mol
12Organic chemistryAn acyclic saturated hydrocarbon has 18 carbon atoms. How many hydrogen atoms does its molecular formula contain? Round to 3 decimal places if needed.
13BiochemistryA simple unbranched, noncyclic peptide contains 135 amino-acid residues. How many peptide links connect adjacent residues? Round to 3 decimal places if needed.
14BiochemistryWhere are phospholipid tails mainly found in a bilayer?