How many moles of oxygen gas can be produced during electrolytic decomposition of 180 g of water?

Options

A. 5 mol
B. 7 mol
C. 3 mol
D. 2 mol

Answer

A

Explanation

`2H_2 O to 2H_2 +O_2`
` 2 xx 10 = 35 g `
36 g of water produces 1 mol of `O_2` gas.
180 g of water will produce `(180 )/(36 ) ` =5 mol of ` O_2 ` gas