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Use the periodic table to determine how many atoms of phosphorus (P) are in a sample that has a mass of 172.90 g.

A3.48 × 1021 atoms

B1.97 × 1022 atoms

C3.36 × 1024 atoms

D1.04 × 1026 atoms

Verified Answer :

MissPhiladelphia

Avogadro's number
represents the number of units in one mole of any substance. This has the value
of 6.022 x 10^23 units / mole. This number can be used to convert the number of
atoms or molecules into number of moles. We do as follows:

 172.90 g ( 1 mol / 30.97 g ) (6.022 x 10^23 atoms / mol) = 3.36 × 10^24 atoms

Therefore, option C is the answer.

SenpaiTrill

Hello there.

Use the periodic table to determine how many atoms of phosphorus (P) are in a sample that has a mass of 172.90 g.

C. 3.36 × 1024 atoms

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