How many molecules of oxygen are produced when a sample of 38.9 g of water is decomposed by electricity? A) 6.5 x 10^23
B) 1.3 x 10^24
C) 2.6 x 10^24
D) 2.3 x 10^25

A)

Explanation:

m = Mass of water = 38.9

M = Molar mass of water = 18 g/mol

= Avogadro's number =

The reaction of electrolysis would be

Number of moles of

From the reaction it can be seen that 2 moles of gives 1 mole of

So, number of moles of produced is

Number of molecules

So, of oxygen is produced.

it is stable as it is in group 0 which have full outer shells of electrons

a is the correct answer