1.

The standard hardwater meansa. 2g of CaCo3 in 1 lit. waterb. 10g of CaCo3 in 1 lit, waterc. 5g of CaCO3 in 1 lit. waterd. 1g of CaCo3 in 1 lit, water​

Answer»

Answer:

10g of CACO3 in 1 LIT, WATER



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