Advertisements
Advertisements
Question
How many moles are there in 34.5 g of sodium ? (Atomic mass of Na = 23 u)
Advertisements
Solution
Mass of zinc = 10g
gram atomic mass of zinc = 65g
We know that one mole of zinc contains 6.022 × 1023 atoms of zinc.
65g of zinc contain = 6.022 × 1023 atoms
Therefore, 10g of zinc contain = 10 × 6.022 × 1023/65 = 9.264 × 1022 atoms
Hence, 10 grams of zinc contain 9.264 × 1022 atoms.
APPEARS IN
RELATED QUESTIONS
What name is given to the amount of substance containing 6.022 × 1023 particles(atoms,molecules or ions) of a substance ?
How many atoms are there in 0.25 mole of hydrogen ?
A flask contains 3.2g of sulphur dioxide.Calculate the following : The moles of sulphur dioxide present in the flask.
Calculate the number of gram atoms in 4.6 grams of sodium (Na = 23)
Calculate the number of particles in 0.1 mole of any substance.
Calculate the number of molecules in one Kg of calcium chloride.
How many grams of Al are present in 0.2 mole of it?
1 mole of any substance contains ______ molecules.
How many grams are there in the following?
3 moles of chlorine molecule, Cl2.
Deduce the number of molecules of the following compound in the given quantity.
8.8g carbon dioxide
