Question

what is the mass of 0.8 mole of water molecules​

Answer 1

Answer:

Mass of Water = ?

no. of moles = 0.5

Molar mass of H₂O = 2(1) + 16 = 18 g/mol

Formula to be Used:

No. of moles = Given Mass/Molar mass

Solution:

No. of moles = Mass of Water/Molar mass

0.5 = Mass of Water/18

Mass of Water = 0.5*18

Mass of Water = 9g

Answer 2

Given

no of moles = 0.8

To find

Mass of 0.8 moles of water molecules

Solution

The solution to the above problem can be found using the simple equation for the concentration of solutions

The solution to the above problem is as follows

We know that the molar mass of H20 = 2*1+16= 18

And now the equation for moles =   $\frac{Given mass}{Molar mass}$

• So We get it as  $\frac{Mass of water}{Molar mass}$

0.5=  $\frac{Mass of water}{18}$

• Therefore taking it to the left we get a Mass of water= 0.5*18 =9g

So the mass of 0.8 moles of water = 9g