# Calculate the number of atoms in 46g of Na.

By Ritesh|Updated : November 9th, 2022

46g of Na contains 12.044 x 1023 atoms. Steps to Calculate the number of atoms in 46g of Na: We know that the Molar mass of Na = 23g,

Given mass = 46g

Number of moles = Number of atoms/ Avagadro Number (NA) = Given mass/ Molar mass

Number of atoms = Given mass x NA/ molar mass

Substituting the values we get:

= 46 x 6.022 x 1023/ 23

= 2 x 6.022 x 1023

= 12.044 x 1023 atoms

### Physical Properties of Sodium

• The metallic luster of sodium is very strong. The color is very similar to silver.
• At room temperature, it becomes soft enough to be pressed with a finger into a leaf shape.
• Sodium compounds change color more slowly in the air than potassium compounds.
• In the air, sodium reacts with oxygen to form sodium oxide, which combines with water vapor to form a film of sodium hydroxide.

Uses of Sodium

• Additionally, it is used to clean soaps, molten metals, and sodium vapor lamps, and improve the structure of some alloys.
• Sodium is a component of sodium chloride, an important substance in the environment that supports life.
• Both the formation of esters and the formation of organic molecules are sodium-dependent.
• Solid sodium carbonate is required for the manufacture of glass.

Summary:

## Calculate the number of atoms in 46g of Na.

46g of Na contains 12.044 x 1023 atoms. Sodium is very strong and is a similar color to that silver. It becomes soft and changes color when exposed to air.