Question

What weight of Calcium conting the same Number
of atoms as are prsent in 2g of sulphur​

Answer 1

Atomic mass of sulphur = 32 amu

Gram atomic mass of sulphur = 32 g

1 mole of sulphur contains = 6.023 x 1023

atoms

Now 32 g of sulphur contains

= 6.023 x 1023 atoms =

3.2 g of sulphur would contain

6.023 x 1023

32

x 3.2 = 6.023 x 10 atoms

Gram atomic mass of calcium = 40 g =

1 mole of calcium = 40 g =

= 6.023 x 1023 atoms

Now 6.023 x 1023 atoms of calcium have mass

= 40 g =

.. 6.023 x 1022 atoms of calcium will have mass 40 x 6.023 x 1022 = 4 g

=

6.023 x 1023