1.

The total number of electrons in 18 mL of water (density = 1 g mL^(-1) ) is

Answer»

`6.02 xx 10^23`
`6.02 xx 10^25 `
`6.02 xx 10^24 `
`6.02 xx 18xx 10^23`

Solution :Mass of water` = 18 ML xx 1g mL^(-1) = 18 g `
or= 1 mol
No. of molecules in 1 mol of water
` = 6.02 xx 10^23`
No. of ELECTRONS in 1 molecule of water
= 2 + 8 = 10
` THEREFORE ` No. of electrons in 1 mol of water
` = 6.02 xx 10^23 xx 10`
` = 6.02 xx 10^24 `


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