Question

what is the mass of 8 moles of sodium sulphite ​

Answer 1

Answer:

A mole is defined as the mass of the substance which consists of the equal quantity of basic units. A mole fraction indicates the number of chemical elements. One mole of any substance is equal to the value of Avagadro number (6.023 x 1023). It can be used to measure the products obtained from the chemical reaction. The unit is denoted by mol.

Number of moles = Mass of the substance / Molecular mass

Since sodium sulphite (Na2SO3) contains two atoms sodium, one atom of sulfur and three atoms of oxygen. The molecular weight would be

Na : 2 x 23.0 = 46

S : 1 x 32 = 32

O : 3 x 16 = 48

When we add up the total values i.e, 46 + 32 + 48 = 126

Therefore, the molar mass of Na2SO3 is 126 g/mole

n = Mass / Molecular mass

Mass = n x Molecular mass

Mass = 10 x 126

Mass = 1260 grams

∴ The mass of 10 moles of sodium sulphite = 1260 grams.

Answer 2

Answer:

Mass of 8 moles of sodium sulphite ​= 1008g

Explanation:

Sodium sulphite = Na2SO3

Gram molecular mass of Na2SO3 = 126g

Mass of 1 mole of Na2SO3 = 126g

Mass of 8 moles of sodium = ?

=126 x 8 = 1008g