Question

Find the number of molecules in 39.2 g of nitrogen
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Answer 1

find the number of molecules in 39.2 of nitrogen

Answer 2

Answer:

1.68 × 10²⁴ molecules

Explanation:

Given mass of nitrogen = 39.2 g

Molar mass of nitrogen = 14 g

Number of moles = Given mass / Molar mass

= 39.2/14 mol

Now,

Number of molecules = Number of moles × Avogadro constant

[Avogadro constant = 6.022 × 10²³]

= (39.2/14) × 6.022 × 10²³

= 16.86 × 10²³

= 1.68 × 10²⁴ molecules