Question

what is difference between 18u
water and 18 gram
​

Answer 1

18u is the molecular mass of water which is the total of mass of hydrogen atoms and mass of oxygen atoms and 18 gram is the weight of the water.

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Answer 2

Given: 18u water and 18 gram.

To find: We have to find the difference.

Solution:

u is defined as the mass and gram is the unit of weight.

The atomic mass of H is 1 and the atomic mass of O is 16.

So, the molecular mass of water is 18u.

The atomic weight of H is 1 and the atomic weight of O is 16.

So, the molecular weight of water is 18grams.

Thus 18u water defined the molecular mass of water and 18 grams of water defined the molecular weight of water.