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

User Ian Flynn
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1 Answer

21 votes
21 votes

Answer:

3.09 x 10²⁰ atoms

Step-by-step 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

How many atoms are in 20.5 mg (miligram) argon. Express answer in scientific notation-example-1
User Avi Avraham
by
3.0k points