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rehooreh14
24.08.2019 •
Chemistry
Which statement best describes the equation caco3 + 2hcl → cacl2 + co2 + h2o?
a. caco3 is a reactant; it is present before the reaction occurs.
b. cacl2 is a reactant; it is present before the reaction occurs.
c. co2 is a reactant because it is most likely a gas.
d. h2o is a reactant because it is most likely a liquid.
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Ответ:
Option (A) is the correct answer.
Explanation:
It is known that while writing a chemical reaction equation, reactants are written on left hand side whereas products are written on right hand side.
For example,![CaCO_{3} + 2HCl \rightarrow CaCl_{2} + CO_{2}](/tpl/images/0193/5213/b720b.png)
Here, both
and HCl are the reactants whereas
,
and
are the products.
Hence, we can conclude that the statement
is a reactant; it is present before the reaction occurs, best describes the given equation.
Ответ:
Bonjour
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