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Calculate the mass of 3.011 × 1023 atoms of nitrogen.

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First we will convert 3.011 × 1023 number of nitrogen atoms into number of moles: 

We know, 1 mole = 6.022 × 1023 (Na = Avogadro’s number) 

The number of moles = \(\frac{Given\,number\,of\,atoms}{Avogadro's\,number}\)

Number of moles = \(\frac{3.011\times10^{23}}{6.022\times10^{23}}\)

Number of moles = 0.5 

Now, to calculate mass, apply the formula: 

Number of moles (n) = \(\frac{Mass\,(m)}{Molar\,mass\,(M)}\)

We can write: 

Mass (m) = Number of moles (n) × Molar mass of nitrogen (M) 

Mass = 0.5 mol × 14g/mol

Mass = 7g 

Thus, the mass of 3.011 × 1023 atoms of nitrogen is 7g.

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