1. How many molecules are in 240g of sulfuric acid?

14.8 * 10²³ molecules

Explanation:

Given dа ta:

Mass of sulfuric acid = 240 g

Number of molecules = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms, ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 * 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 * 10²³ molecules of water

1.008 g of hydrogen = 1 mole = 6.022 * 10²³ atoms of hydrogen

Number of moles of sulfuric acid

Number of moles = mass / molar mass

Number of moles = 240 g / 98 g/mol

Number of moles = 2.45 mol

Number of molecules:

1 mole = 6.022 * 10²³ molecules

2.45 * 6.022 * 10²³ molecules

14.8 * 10²³ molecules