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    Some questions of general chemistry and chemical equations

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    Question 36 Multiple Choice 20 points
    Atoms of the same element with different mass numbers are called:
    nucleons
    neutrons
    allotropes
    chemical families
    isotopes

    Question 37 Multiple Choice 20 points
    Which is the correct formula for copper(II) phosphate?

    Cu2PO4
    Cu3(PO4)2
    Cu2PO3
    Cu(PO4)2
    Cu(PO3)2

    Question 38 Multiple Choice 20 points
    When a chemical equation is balanced, it will have a set of whole number coefficients which cannot be reduced to smaller whole numbers. When the following chemical equation is balanced, what is the sum of the coefficients (do not forget to add in the coefficient one if it occurs)?
    ___ Al + ___ H2SO4 ___ Al2(SO4)3 + ___ H2

    3
    5
    6
    9
    12

    Question 39 Multiple Choice 20 points
    CH3NH2 represents a/an

    alcohol
    alkyne
    amine
    ester

    Question 40 Multiple Choice 20 points
    How many protons and electrons are present in Bromine?

    80 protons, 35 electrons
    45 protons, 35 electrons
    35 protons, 45 electrons
    35 protons, 35 electrons

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    https://brainmass.com/chemistry/stoichiometry/some-questions-of-general-chemistry-and-chemical-equations-39902

    Solution Preview

    Questions 36
    Those atoms are called: isotopes

    Question 37
    The correct formula is: Cu3(PO4)2, ...

    Solution Summary

    The answers are given without detailed explanations. In two cases short hints are given because the question is of general importance and to make it easier to apply the rules on other similar chemical problems.

    $2.49

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