Question

How many molecules are present in 1.75 moles of dihydrogen monoxide

Answer 1

10.535 ₓ 10²³ molecules

Given data:

Moles of dihydrogen monoxide = 1.75

No. of molecules of dihydrogen monoxide = ?

Solution:

1 mole of solution = 6.02 ₓ 10²³ molecules

1.75 mole of solution = (6.02 ₓ 10²³) ₓ 1.75

= 10.535 ₓ 10²³ molecules

Answer 2

The main knowledge you'd have to know to answer this question is the Avogadro's number. It is an empirical data which represents the number of molecules per mole of any substance. It is equal to 6.022*10²³ molecules/mole.

Number of molecules = 1.75 moles*6.022*10²³ molecules/mole = 1.054×10²⁴ molecules