# Write molecular equation of transformation of calcium carbonate CaCO3 into a calcium

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Write molecular equation of transformation of calcium carbonate CaCO3 into a calcium hydrogen carbonate Ca(HCO3)2. Point out the sum of the coefficients in the equation:

А.  7

B.  4

C.  6

D.  5

E.  8

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Point out the sum of the coefficients in the equation: