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Q.

What is the chemical formula Sodium carbonate?

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a

Na2HCO3

b

NaHCO3

c

Na2CO3

d

NaCO3

answer is A.

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Detailed Solution

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Sodium carbonate is made up of sodium (Na+) and carbonate (CO3-2 ) ions. According to the criss-cross method, the numerical value of the ion charge of the two atoms is crossed over, which becomes the subscript of the other ion. 

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Hence, the chemical formula for sodium carbonate is Na2CO3.

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