Question

Why formula of calcium carbonate is caco3?

Answer 1

HOLA,
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we can find the formula of calicium carbonate by criss cross method.

ca.(+2). co3(-2).
' '
' '
' '
ca(2) co3(2)
" "
" "
ca......................co3.

=》formula:caco3.
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HOPE THIS HELPS YOU.
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MARK AS BRAINLEST.
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Answer 2

Calcium has a valency of +2
Carbonate has a valency of -2 .

Now, By using criss - cross method,

First, We divide the valencies by their common factor and then The valency is multiplied diagonally.

Finally , We get the chemical formula of Calcium carbonate as CaCO3