Chemical Equation

by Osama M. Khaled last modified 2022-06-24T11:49:13+01:00

Chemical Equations and its parts

Chemical Equation
Questions #: 10
Time: 1 minutes
Pass Score: 80.0%

    A chemical reaction expresses a chemical change

    True
    False

    Is this a chemical reaction?

    Hydrogen reacts with oxygen to make water

    Yes
    No

    Fill in the gaps of the chemical change statement

    hydrogen + (1)_______ → (2)_______

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    water
    oxygen

    What do signs mean in this statement

    hydrogen + oxygen → water

    1. +
    2. → 
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    two substances interact chemically
    a chemical reaction takes place

    Is this chemical equation represented properly?

    H2 + O2 → H2O

    Yes
    No

    Name the parts of the chemical equation

    H2 + O2 → H2O

    1. H2
    2. O2
    3. H2O
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    products
    reactants

    In light of the law of conservation of matter, is this a complete chemical equation?

    H2 + O2 → H2O

    Yes
    No

    Can we change the subscripts in the formula for water so that it has two oxygen atoms in it in order align with the law of conservation of matter?

    H2 + O2 → H2O

    Yes
    No

    What can you do in order to accommodate for the missing atom of oxygen in water chemical equation?

    In light of the law of conservation of matter

    H2 + O2 → H2O

    Nothing
    Change subscript number
    Change the number of molecules that react or are produced

    Balance the chemical equation

    Hydrogen and chlorine react to make HCl

    H2 + Cl2 → [ ? ] HCl

    Missing