Question

How many moles of water are there in 1.538 L?

Answer 1

Na Ja Na Ja mitra ka noor raab ne banaiye tu lag diya hur

Answer 2

Step by step explanation:

Given : Volume of water is $1.538 L$.

To find : The no. of moles of Water.

Formula used : No. of moles of any compound A

$N=\frac{W}{M}$

N is the no. of moles, W is for the given mass and M is for molar mass of compound A.

Density (ρ) $=\frac{W}{V}$

W is for mass and V is for volume of compound.

$1 L=1000cm^{3}$

• Calculation for mass of water (W),

We have volume of water,

$V=1.538 L$

    $=1.538*1000 cm^{3}$

    $=1538 cm^{3}$.

By using density formula we can find the mass(W) of water,

$\rho=\frac{W}{V}$

and we know the density of water is $1g/cm^{3}$.

$1g/cm^{3}=\frac{W}{1538cm^{3} }$

$W=1538g$

We get the mass of water is $1538 g$.

• Calculation for molar mass of water(M)

molar mass of hydrogen is $1g/mol$ and molar mass of oxygen is $16g/mol$.

So the molar mass of H₂O $=2*1+16$

                                            $=18g/mol$.

Molar mass of water is $18g/mol$.

• Calculation for no. of moles(N)

we have

$W=1538g$   and  $M = 18g/mol$

formula is,

$N=\frac{W}{M}$

    $=\frac{1538}{18}$

     $=85.44mol$

we get no. of moles of water is $85.44 moles.$