Created by StemPy LabFour hydrocarbons are described in List-I. Atomic masses in : H 1, C 12. Match each with its molecular formula in List-II. List-I (Data) A. Empirical formula ; molar mass B. burns to give of and of water C. carbon by mass; molar mass D. of it holds of carbon; molar mass List-II (Molecular formula) I. II. III. IV.
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← The true mass of a steel weight is 3.000 g. Student P weighs it three times on one balance and records 2.915 g, 2.913 g and 2.917 g. Statement I: The readings of student P are precise but not accurate. Statement II: If the true mass were not known, the precision of these readings could still be judged, but their accuracy could not.Assertion (A): Dalton's atomic theory, which treats a chemical reaction as a reorganisation of atoms, could explain Gay Lussac's finding that two volumes of hydrogen and one volume of oxygen give two volumes of water vapour at the same temperature and pressure.
Reason (R): Avogadro proposed that equal volumes of all gases at the same temperature and pressure contain equal numbers of molecules, and he took the molecules of hydrogen and oxygen to be made of two atoms each. →
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