Question

Calculate the number of moles 64 gram of sodium stom.​

Answer 1

atomic weight of sodium = 23

i.e. one mole of Na weighs 23 grams hence no. of moles of Na weighing 64 grams

= 64/23

and no. of atoms

= (64/23 ) ×Avogadro's No.

Answer 2

The molar mass of the substance represents the mass of the substance in one mole. You can see the molar masses of the substance in interest in the periodic table of elements.

•It is mostly seen at the right bottom side of the element name. In here, you have 64 grams of sodium. You should know by now that sodium has a molar mass of 23 grams per mole.

•To get the number of moles of sodium, divide 64 grams by 23 grams per mole. The answer is 2.78 moles of sodium.

Here we can describe like

1 mole = 23 grams of sodium

so 64 grams of sodium= 64÷23 moles = 2.78 moles