Question

calculate the mass of single molecule and atom of oxygen in amu and in gm (answer = (32amu, 5.312×10^-23g, 1.6amu)

Answer 1

$<marquee>☺☺Hi there☺☺</marquee>$

We are given that the atomic mass of oxygen is 16u. In a molecule of oxygen, there are two oxygen atoms and it is denoted by O2.
So, the molecular mass of O2will be 2 X 16u = 32u. Thus, the molar mass that is the mass of 6.023 X 1023 molecules of oxygen will be 32g. So

mass of 6.023 X 1023 molecules (one mole) of oxygen = 32g

mass of one molecule of oxygen = [32 / (6.023 X 1023) ]g 

= 5.313 X 10-23g

Thus, the mass of one oxygen molecule will be 5.313 X 10-23g 

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