One litre sample of water contains 0.9 mg `CaCl_(2)` and 0.9 mg of `MgCl_(2)`. Find the total hardness in terms of parts permillion of `CaCO_(3)`.

One litre of sample of hard water contains 0.8 mg of CaCl_(2) and "0.8 mg of MgCl"_(2) . Find the total hardness in terms of parts of CaCO_(3) , per 10^(6) parts of water by mass.

One litre of sample of hard water contains 0.8 mg of CaCl_(2) and "0.8 mg of MgCl"_(2) . Find the total hardness in terms of parts of CaCO_(3) , per 10^(6) parts of water by mass.

One litre of a sample of hard water contains 1 mg of CaCl_(2) and 1 mg of MgCl_(2) . Find the total hardness of water in terms of parts of CaCO_(3) per 10^(6) parts of water by mass.

One litre of a sample of hard water contain 4.44mg CaCl_(2) and 1.9mg "of" MgCl_(2) . What is the total hardness in terms of ppm of CaCO_(3)?

One litre of a sample of hard water contain 4.44mg CaCl_(2) and 1.9mg "of" MgCl_(2) . What is the total hardness in terms of ppm of CaCO_(3)?

One litre of a sample of hard water contain 4.44mg CaCl_(2) and 1.9mg "of" MgCl_(2) . What is the total hardness in terms of ppm of CaCO_(3)?

One litre of a sample of hard water contains 5.55 mg " of "CaCl_(2) and 4.75 mg" of "MgCl_(2) . The total hardness in terms of ppm of CaCO_3 is