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IGCSE Chem 04

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20 questions

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  • 1. Multiple-choice
    30 seconds
    1 pt

    The equation shows the reaction between magnesium and sulfuric acid.

    [Ar: H, 1; O, 16; Mg, 24; S, 32]


    Mg + H2SO4 → MgSO4 + H2


    In this reaction, which mass of magnesium sulfate is formed when 6 g of magnesium react with excess sulfuric acid?

    A 8

    B 24

    C 30

    D 60

  • 2. Multiple-choice
    30 seconds
    1 pt

    Two atoms of magnesium, Mg, react with one molecule of oxygen, O2.

    What is the formula of the product?

    A MgO

    B MgO2

    C Mg2O

    D Mg2O2

  • 3. Multiple-choice
    30 seconds
    1 pt

    What is the relative molecular mass (Mr) of HNO3?

    A 5

    B 31

    C 32

    D 63

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