Question

One drop of water having mass o.50g find number of molecules

Answer 1

mass is given, by applying direct formula
no. of moles = given mass × molar mass
n=0.5×18
n=9,
no. of particles = no.of moles × Avogadro's constant
no. of particles = 9×6.022×10²³
no. of particles = 5.48002×10²⁴

(check the calculation once, it may be wrong)

Answer 2

Answer:

mass is given, by applying direct formula

no. of moles = given mass × molar mass

n=0.5×18

n=9,

no. of particles = no.of moles × Avogadro's constant

no. of particles = 9×6.022×10²³

no. of particles = 5.48002×10²⁴

Explanation: