(10 POINTS)

2 answers:

7 0

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

SVETLANKA909090 [29]3 years ago

4 0

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.

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