Chemistry, asked by Adikesav, 1 month ago

Atomic mass of nitrogen is 14.

a) How many atoms are present in 2 GAM nitrogen.

b) Find the mass of 4 x 6.022 x 1023 nitrogen atoms​

Answers

Answered by nirman95
5

Given:

Atomic mass of nitrogen = 14 gram

To find:

  • Atoms in 2 gram of nitrogen ?
  • Mass of 4 × 6.022 × 10²³ atoms of nitrogen ?

Calculation:

2 grams of nitrogen:

  • Number of moles = 2/28 = 1/14 moles.

So, number of atoms is :

 =  \dfrac{1}{14}  \times 2 \times 6.022 \times  {10}^{23}

 = 0.86 \times   {10}^{23}

 = 8.6 \times   {10}^{22}  \: atoms

Mass of 4 × 6.022 × 10²³ atoms :

  • Number of moles = 4 N_(A)/2 N_(A) = 2 moles.

  • So, mass = 2 × 14 = 28 grams of Nitrogen.

Hope It Helps.

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