Question

Find the number of gram molecular mass(GMM)present in 56g Nitrogen[Molecular mass of nitrogen is 28]​

Answer 1

Answer:

2

Explanation:

given Mass = 56g

GMM of oxygen =28g

No of GMM= 56÷28

= 2

No of moles = 2

23

No of molecules=2×6.022×10

23

= 12.044×10

Answer 2

Given:

Mass of nitrogen $=56g$

Molecular mass of nitrogen $=28$

To Find: Number of gram molecular mass (GMM) present in 56g Nitrogen

Solution:

Gram molecular mass is defined as the mass (in grams) of one mole of a substance.

It is the same as the molar mass of a substance.

According to the formula,

$\[Number\,of\,moles = \frac{{Mass}}{{Molar\,mass}}\]$

$\[Number\,of\,moles = \frac{{56g}}{{28g}}\]$

$\[Number\,of\,moles = 2\]$

Therefore, the number of moles present in 56 g of nitrogen is 2.

The mass of 2 moles of nitrogen is 56 g.

Thus, the mass (in g) (GMM) of one mole of nitrogen is

$\[GMM = \frac{{56g}}{2}\]$

$\[GMM = 28g\]$

Hence, the gram molecular mass (GMM) present in 56 g is the same as the molar mass of nitrogen, i.e. 28 g.