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Hardness of water is 200 ppm. The normal...

Hardness of water is 200 ppm. The normality and molarity of `CaCO_3` in the water is
(a). `2xx10^(-6)(N,2xx10^(-6)M`
(b). `4xx10^(-2)N,2xx10^(-2)M`
(c). `4xx10^(-3)N,2xx10^(-3)M`
(d). `4xx10^(-1)N,2xx10^(-1)M`

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