What is the mass (in grams) of 4.5 x 10^23 units of NaCl? could you also explain?

Question

What is the mass (in grams) of 4.5 x 10^23 units of NaCl?

could you also explain?

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Thiên Ân 4 years 2021-07-30T04:53:06+00:00 1 Answers 9 views 0

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  1. ngochoa
    0
    2021-07-30T04:54:20+00:00
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    Answer:

    43.7 g

    Explanation:

    unit mass of NaCl = (23 + 35.5) u = 58.5 u

    58.5 is the mass of one unit formula of NaCl (since NaCl is not a molecular compound)

    1 u = 1.661×10^-24 g

    if 1 unit formula of NaCl has 58.5 u, then 4.5×10²³ units of NaCl will have:

    58.5 u × (1.661×10^-24 g/1 u) × 4.5×10²³ = 43.7 g

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