Correct Answer: Option B

Explanation

Given:

mass, m = 14g

Molar mass of N\(_2\) = 14 X 2 = 28g/mol

number of moles, n = ?

But n = \(\frac{m}{M}\) = \(\frac{14}{28}\) 

                       n = 0.5 mole

Also, recall that Number of moles = \(\frac{Number of Molecules}{Avogadro number}\)

                                                n  = \(\frac{N}{L}\)

                                                N = n x L

                                                   = 0.5 x 6.02 x  10\(^{23}\)

                                                   = 3.01 x 10\(^{23}\) molecules

• What can i study with 155 score in science course? Answer this

  1 Answers   ·   Biology   ·   2 days ago
• what is the fluid in the eye calles? Answer this

  1 Answers   ·   Biological Science   ·   16 hours ago
• which school is the richest school in Nigeria? Answer this

  1 Answers   ·   1 day ago