Find the mass of 2.16 * 1023 molecules H2S.

Answer in units of g.

Mass = 12.276 g

Explanation:

Given dа ta:

Number of molecules of H₂S = 2.16 * 10²³

Mass in gram = ?

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

Number of moles of H₂S:

2.16 * 10²³ molecules * 1 mole / 6.022 * 10²³ molecules

0.36 moles

Mass = number of moles * molar mass

Mass = 0.36 mol * 34.1 g/mol

Mass = 12.276 g