Question

molecular mass kaise nikalte Hain
I
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Answer 1

Explanation:

if u have : H2 ...which is a molecule

so , we have to find the mass of H2

➡️ first find the mass of H2 ....many times it's already given in the question

➡️ hydrogen has 1 amu as mass

here amu is a unit or mass of protons or neutron

➡️ if u want to find the mass of hydrogen then

➡️ no . of protons , neutron present in it

➡️in hydrogen their are 1 proton and 0 neutron

➡️ mass : Protons+Neutron

mass :1

➡️ hydrogen molecule means 2 times hydrogen atom

➡️ 2(mass of hydrogen atom)

➡️2(1) ........as we had find the mass of hydrogen above

➡️ 2g .....

hope it will help you