Question

Molecular mass of water is 18u.What will be the number of molecules of water in 18 g water?



guYs I am in class 9th
so, please give answer according to my standard and please give Full explanation​

Answer 1

Answer:

here is your answer hope it is helpful

Answer 2

Answer:

6.022 × 10²³ molecules

Explanation:

Molecular weight of water = 18 g/mol

Given weight = 18 g

So, number of moles n = (Given Weight)÷(Molecular Weight)

So, n = 18/18 = 1 mole

Now, 1 mole of any entity contains

6.022 × 10²³ units of that entity.

So, in 1 mole water, there are 6.022 × 10²³ molecules