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7 July, 10:15

Based on the chemical formula of glucose (C6H12O6), select all the true statements.

a. The mass percent of carbon and oxygen in glucose is the same.

b. In 1 molecule of glucose there are 6 atoms of carbon. T

c. he element with higher mass percent in glucose is hydrogen.

d. In 1 mol of glucose there are 6 mols of carbon.

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Answers (2)
  1. 7 July, 10:20
    0
    A) False:

    B) True

    C) False

    D) True

    A) The mass of a mol of glucose is 180g,

    mass of C in one mol of glucose=6 (12 g) = 72 g

    mass of H in one mol of glucose=12 (1 g) = 12 g

    mass of O in one mol of glucose=6 (16 g) = 96 g

    % mass of C = (72g/180 g) * 100=40%

    % mass of O = (96 g/180 g) * 100=53.33%

    Therefore the mass percent of carbon and owigen in glucose isn't the same.

    b) In 1 molecule of glucose there are 6 atoms of C.

    c)

    % mass of H = (12 g/180g) * 100=6.67%

    Therefore; the element with lower mass percent in glucose is hydrogen.

    d) yes, in 1 mol of glucose there are 6 moles of carbon, if the formule was C7H12O6, the numbers of moles would be 7.
  2. 7 July, 10:34
    0
    A is true

    B is true

    C is true

    D is false?
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