How many grams are in 8.50 e 23 formula units of NaCl? a)82.5 g b)8.25 g c)85.0 g d)91.5 g

Question

How many grams are in 8.50 e 23 formula units of NaCl?
a)82.5 g
b)8.25 g
c)85.0 g
d)91.5 g

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RuslanHeatt 5 years 2021-07-11T10:57:20+00:00 1 Answers 17 views 0

Answers ( )

  1. thuhuong
    0
    2021-07-11T10:58:31+00:00
    Reply

    Answer:

    a)82.5 g

    Explanation:

    To solve this problem we will use Avogadro’s number, which states the number of formula units per mole.

    • 8.50×10²³formula units ÷ 6.023×10²³ formula units/mol = 1.41 mol

    Then we convert 1.41 moles of NaCl to grams, using its molar mass:

    • 1.41 mol NaCl * 58.44 g/mol = 82.4 g

    The closest answer is option a).

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