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Sodium carbonate of 92% purity is used i...

Sodium carbonate of 92% purity is used in the reaction,
`Na_2CO_3`+ `CaCl_2` `->` `CaCO_3` + 2NaCl
The number of grams of `Na_2CO_3` required to yield 1g of `CaCO_3` is ? (GAM of Na=23, Ca=40, C=12, O=16)
A) 8.5g
B)10.5g
C)11.52g
D)1.152g

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