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5 January, 13:24

If one mole of a substance has a mass of 56.0 g, what is the mass of 11 nanomoles of the substance? Express your answer in nanograms using the correct number of significant figures. Do not enter your answer using scientific notation.

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  1. 5 January, 15:04
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    616,0 ng is the right answer.

    Explanation:

    You should know that 1 mole = 1.10^9 nanomoles

    Get the rule of three.

    1.10^9 nanomoles ... 56.0 gr

    11 nanomoles ...

    (11 x 56) / 1.10^9 nanomoles = 6.16 x 10^-7 gr

    Let's convert

    6.16 x 10^-7 gr x 1.10^9 = 616 ngr
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