Verified Answer :

Answer:There are \(3.43\times 10^{24} atoms\) in 5.7 mol of hafnium.

Explanation:

Moles of hafnium = 5,7 moles

1 mol = \(N_A=6.022\times 10^{23} atoms\)

Number of atoms in 5.7 moles of hafnium :

\(=5.7\times 6.022\times 10^{23} atoms=3.43\times 10^{24} atoms\)

There are \(3.43\times 10^{24} atoms\) in 5.7 mol of hafnium.

samueladesida43

There are 3.43 × 10²⁴ atoms in 5.7 moles of hafnium.

HOW TO CALCULATE NUMBER OF ATOMS:

  • The number of atoms of a substance can be calculated by multiplying the number of moles in the substance by Avogadro's number as follows:

  • no. of atoms = no. of moles (mol) × 6.02 × 10²³

  • According to this question, there are 5.7 mol of hafnium, hence, the number of atoms can be calculated as follows:

  • no. of atoms = 5.7 × 6.02 × 10²³

  • no. of atoms = 3.43 × 10²⁴ atoms

  • Therefore, there are 3.43 × 10²⁴ atoms in 5.7 moles of hafnium.

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