Question

how many moles are in 40 grams in water​

Answer 1

No of moles=Given mass÷Molar mass

No of moles in 40gm of water=40÷18(Molar mass of Water=18gm)

                                                 =2.2moles

Answer 2

Given,

Mass of the water = 40 grams

To find,

Number of moles in the given amount of water.

Solution,

We can simply solve this numerical problem by using the following process.

First of all, we have to calculate the molar mass of the water.

Molar mass of the water (H₂O) = [(2×1)+(16)] = 18 g/mol

Now,

Number of moles = Mass / Molar mass

By putting the given and obtained values, we get that,

Number of moles = 40/18

Number of moles = 2.22

[This will be considered as the final result.]

Hence, the number of moles will be 2.22