Question

Calculate the number of moles for 52 g of He (finding mole from mass)​

Answer 1

Explanation:

Mass of helium is = 4

formula of moles is = given mass/molar mass

Hence =52/4=13 moles

Answer 2

$\LARGE{\underline{\purple{\sf{Answer:–}}}}$

$~~~~~\fbox\pink{~13~}$

_______________________

$\LARGE{\underline{\purple{\sf{Solution:–}}}}$

No. of mass = n

Given mass = m

Given number of particles = N

Avogadro number of particles = $N_0$

.

Atomic mass of He = 4 u

Molar mass of particles = 4g

.

Thus, the number of moles

$=\: \dfrac{given~mass}{molar~mass}$

$⇛~~n \: = \: \frac{m}{M} \: \\ \\ = \: \frac{52}{4} \: = \: 13$