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13-02-2022
Chemistry

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How many atoms are in 20.5 mg (miligram) argon.
Express answer in scientific notation

Respuesta :

SenorMathWiz SenorMathWiz

14-02-2022

Answer:

3.09 x 10²⁰ atoms

Explanation:

We want to find the number of atoms in 20.5mg of argon.

We can use dimensional analysis to do so.

See attached image for table.

Needed conversions:

1g = 1000mg
1 mol of Ag = 39.948g
1 mol = 6.022 x 10¹³ atoms

Ver imagen SenorMathWiz

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