Question

6.
Number of molecules in 44 mg of N O are
(1) 6.022 x 1023
(3) 6.022 x 1021
(2) 6.022 x 1022
(4) 6.022 x 1020​

Answer 1

Answer:

The number 6.02214076×1023 (the Avogadro number) was chosen so that the mass of one mole of a chemical compound, in grams, is numerically equal (for most practical purposes) to the average mass of one molecule of the compound, in daltons.

Answer 2

Molar mass of N₂ =28

Molar mass of O = 16

When you add, you'll get 44g as answer

since the weight is in mg, when we convert it into gram, 44 mg = 44 x 10⁻³

now, no. of molecules = $\frac{44x10^-^3}{44}$ x 6.022 x 10²³ = 10⁻³ x 10²³ = 6.022 x 10²⁰ molecules

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