Question

2) One mole of any substance contains .... molecules.​

Answer 1

Answer:

One mole of any substance contains 6.022×1023 atoms/molecules

Explanation:

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Answer 2

Answer:

One mole of any substance contains 6.022×1023 atoms/molecules.Hint:First we have to calculate the number of moles of the chemical from molarity and volume by using the following formula.

Number of moles of the chemical = (molarity of the chemical) (Volume of the solution in liter)

Later by using the number of moles we can calculate the number of molecules by using the below formula.

Number of molecules of the chemical = (number of moles of the chemical) (Avogadro number)

Avogadro number = 6.022×1023 atoms/molecules

Complete step-by-step answer:- In the question it is given to calculate the number of molecules of sulphuric acid present in 100 ml of 0.02 M solution.

- First we have to calculate the number of moles of sulphuric acid by using the below formula.

Number of moles of the chemical = (molarity of the chemical) (Volume of the solution in liter)

= (0.02) ( 0.1) = 0.002 molecules.

- Now we have to calculate the number of sulphuric acid molecules by using the below formula.

Number of molecules of the chemical = (number of moles of the chemical) (Avogadro number)

= (0.002) (6.022×1023) = 12.044×1020 molecules

- Therefore the number of molecules present in 100 ml of 0.02 M sulphuric acid is 12.044×1020 molecules.

Explanation:

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