If I have the following number of molecules of sulfur dioxide, how many grams is that?
4.57 x 1025 molecules

Mass = 4871.6 g

Explanation:

Given data:

Number of molecules of sulfur dioxide = 4.57 × 10²⁵ molecules

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.

1 mole = 6.022 × 10²³ molecules

4.57 × 10²⁵ molecules × 1 mol / 6.022 × 10²³ molecules

0.76× 10² mol

76 mol

Mass of sulfur dioxide:

Mass = number of moles × molar mass

Mass = 76 mol × 64.1 g/mol

Mass = 4871.6 g

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