Respuesta :

nkirotedoreen46

Answer:

3.36 × 10^24 atoms

Explanation:

We are given;

  • Mass of phosphorus is 172.90 g

We are supposed to calculate the number of atoms of phosphorus;

  • Note that 1 mole of an element contains 6.022 × 10^23 atoms

In this case;

  • 1 mole of phosphorus contains 6.022 × 10^23 atoms
  • But; Molar mass of phosphorus is 30.97 g/mol

Therefore;

30.97 g contain 6.022 × 10^23 atoms

Thus, for 172.90 g

= (172.90 g /30.97 g) × 6.022 × 10^23 atoms/mol  

= 3.36 × 10^24 atoms

Thus, 172.90 g of phosphorus contains 3.36 × 10^24 atoms

Answer:

3.36 × 1024 atoms

Next ones are:

9.01g

0.276g

78,600g

Explanation:

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