Chemistry

Chemistry

Problem

Hardness of water is 400 ppm. The molarity of CaCO3\text{CaCO}_3 in this water is : a. 4×10−6M4 \times 10^{-6} M b. 4×10−2M4 \times 10^{-2} M c. 4×10−3M4 \times 10^{-3} M d. 4×10−1M4 \times 10^{-1} M

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