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24 May, 03:23

How many moles of glucose are in 19.1g of glucose?

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  1. 24 May, 03:54
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    0.106 mol (3s. f.)

    Explanation:

    To find the number of moles, divide the mass of glucose (in grams) by its Mr. Glucose has a chemical formula of C6H12O6. To find the Mr, add all the Ar of all the atoms in C6H12O6.

    Ar of C = 12, Ar of H = 1, Mr of O = 16

    These Ar values can be found on the periodic table.

    Mr of glucose = 6 (12) + 12 (1) + 6 (16) = 180

    Moles of glucose

    = mass : mr

    = 19.1 : 180

    = 0.106 mol (3 s. f.)
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