BaCO3(s) + HCl(aq) =?

[gegogi]

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The solution says it's gas forming reaction and the sum of the coefficients of the balanced equation is 6.

Anyone can explain this for me, please?

 

[nze82]

The solution says it's gas forming reaction and the sum of the coefficients of the balanced equation is 6.

Anyone can explain this for me, please?

1BaCO3 + 2HCl --> 1BaCl2 + 1CO2 + 1H2O