Question

Calculate the mass of substance in 0.01 mole nitrogen gas

Answer 1

Explanation:

Molar mass of N2 is 28(since atomic weight of nitrogen is 14and forN2=14*2). So mass of 1 mole of N2 is 28g.Therefore mass of 0.5 mole is 28/2 =14g

Answer 2

0.28gms of nitrogen is present in 0.01 mole of nitrogen gas

Explanation:

Nitrogen is placed in group 15 of the periodic table. Nitrogen contains 7 electrons and its electronic configuration is $1s^{2}2s^{2}2p^{3}$. Nitrogen has is represented as $N_{2} .$

To calculate the mass of nitrogen gas in 0.01 moles of nitrogen gas, we use the formula;

$Moles = \frac{weight}{Molecular\ weight}$

Given:

Moles of $N_{2}$ = 0.01 mole

Molecular weight of $N_{2}$ = 28 $gm\ mole^{-1}$

Substituting;

$0.01 = \frac{weight}{28}\\\\Weight = 0.01*28$

$Weight = 0.28 gms$