Question

Here is anattachmentbplz solve it with explanation

Answer 1

Answer:

1.204 ×10∧23 molecules

Explanation:

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

= 1.204 × 10∧23 molecules

Answer 2

★ Question.

→ 2.8g of N2 molecules have how many chemical bonds

______________________________

★Answer.

______________________________

→The number of molecule present in 2.8 g of nitrogen is ?

→The number of molecule present in 2.8 g of nitrogen is ?

Number of moles of nitrogen

= $\large\frac{ 2.8g28g} {mol^-1}$=0.1mol

Number of nitrogen molecule = $0.1\:mol×6.023×$$10^{23} \:mole^{-1}$

$\large = 6.02×10^{22}$

Answer.