The volume of water molecule is
Take, density of wter is `10^(3) kg m^(-3)` and avogadros' number `=610^(23) "mole"^(-1))`

The number of water molecules in 250 mL of water is closest to [Given: Density of water is 1.0g" "mL^(-1) , Acogadro's number =6.023xx10^(23) ]

Number of water molecules in a drop of water, if 1 mL of water has 20 drops and A is Avogadro's number, is

Assuming that there is one free electron per atom in copper, determine the number of free electrons in 1 "metre"^(3) volume of copper. Density of copper is 8.9xx10^(3) kgm^(-3) and atomic weight 63.5. (Avogadro's number, N=6.02xx10^(26) per kg-atom).

Volume occupied by one molecule of water (density = 1 g cm^(3) )

The density of water is 10^(3) kg//m^(3) . Estimate the size ("in" Å) of a water molecule.