Question

calculate the number of moles for 50 gram of helium
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Answer 1

Atomic mass of Helium = 4

Given mass = 50

Thus , no of moles = 50/4 = 12.5

Answer 2

Given:

A sample of 50 g of Helium

To Find:

The number of moles in the given sample

Solution:

The number of moles in 50g of Helium is 12.5.

A mole is a measure of the amount of substance. It is the amount of substance that contains exactly 6.022 X 10²³ elementary units.

The number of moles of a substance is given by the formula m / M

Here, m is the given mass of the sample and M is the molar mass of the element.

The molar mass of Helium is 4g

Substituting the values,

The number of moles = 50 / 4

= 12.5 moles