If the density of water of a lake is `1.25 gmL^(-1)` and one kg of lake water contains 92 g of `Na^(+)` ions, calculate the molarity of `Na^(+)` ions in this lake water. (Gram atomic mass of `Na=23"g mol"^(-1)`)

Answer

`m=4`

Explanation

`W_(2)=92g,Mw_(2)=23g`
`W_(1)=1kg=1000g`
`m=(92xx1000)/(23xx10000)=4`