Question

I. Calculate the number of moles and
molecules of acetic acid present in 22 g
of it.​

Answer 1

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Answer 2

Number of moles of acetic acid are 0.367 moles and no. of molecules are  2.21 × $10^{23}$ .

Step by step explanation:

• Calculation of no. of moles of Acetic acid

For the calculation of no. of moles we have the formula;

N = $\frac{W}{M}$  

N stands for No. of moles, W stands for given mass of solute and M for Molar mass of solute .

In this question we are given the W = 22 g and we know the Molar mass of Acetic acid , M = 60 g/mol

By putting required data in above formula we get No. of moles as,

$N=\frac{22}{60}$

N = 0.3667 moles.

• Calculation of No. of molecules of Acetic acid

No. of molecules can be calculated by simply multiplying No. of moles by Avogadro number (Na) which is 6.022 × $10^{23}$  $mol^{-1}$

No. of molecules of acetic acid = N ×  6.022 × $10^{23}$  $mol^{-1}$

                                                   =  $0.3667*6.022* 10^{23}$

Then we get 2.208 × $10^{23}$  no. of molecules of acetic acid are there in solution.