Question

the number of molecules present in 2.8 g of nitrogen is​

Answer 1

Answer:

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Explanation:

1.2 ×10∧23 molecules

Nitrogen is an element in the periodic table

The relative molecular mass of nitrogen is 14

To get the number of molecules present we 1st find the  moles present

Moles = mass/relative molecular mass

2.8 ÷ 14 = 0.2 moles

One mole of any substance is always equal to the avogadro's number of particles 6.0 × 10∧23

Therefore

0.2 moles × 6.0 × 10∧23

= 1.2 × 10∧23 molecules