Question

Calculate the mass of the following:
(a) 0.5 mole of N, gas
(b) 0.2 mole of O-atoms
(c) 4 moles of aluminium atom​

Answer 1

Answer:

a)14 b)3.2 a.m.u c)180gr

Answer 2

$\color{darkblue}\underline{\underline{\sf 1.\:Question-}}$

0.5 mole of N-gas calculate its mass.

$\color{darkblue}\underline{\underline{\sf Solution-}}$

$\color{violet}\bullet\underline{\boxed{\sf Mole=\dfrac{Mass}{Molecular \: Mass}}}$

$\implies{\sf 0.5=\dfrac{Mass}{14} }$

$\implies{\sf Mass=0.5×14}$

$\color{red}\implies{\sf Mass = 7\:g }$

$\color{darkblue}\underline{\underline{\sf 2.\: Question -}}$

0.2 mole of O-atom . Calculate mass of O-atom

$\color{darkblue}\underline{\underline{\sf Solution-}}$

$\color{violet}\bullet\underline{\boxed{\sf Mole=\dfrac{Mass}{Molecular \: Mass}}}$

$\implies{\sf 0.2=\dfrac{Mass}{16} }$

$\implies{\sf Mass=0.2×16}$

$\color{red}\implies{\sf Mass=3.2\:g}$

$\color{darkblue}\underline{\underline{\sf 3.\: Question-}}$

4 mole of Aluminum atom . Calculate mass of Aluminum atom.

$\color{darkblue}\underline{\underline{\sf Solution-}}$

$\color{violet}\bullet\underline{\boxed{\sf Mole=\dfrac{Mass}{Molecular \: Mass}}}$

$\implies{\sf 4=\dfrac{Mass}{27} }$

$\implies{\sf Mass=4×27}$

$\color{red}\implies{\sf Mass=108\:g }$