The following two reactions are investigated in this experiment. select the coefficients to obtain the correct balanced equations. alka-selzter reaction nahco3(aq) + c6h8o7(aq) → co2(g) + na3c6h5o7(aq) + h2o(l) unknown antacid reaction caco3(aq) + hcl(aq) → co2(g) + cacl2(aq) + h2o(l)

Answer :

(1) The balanced chemical reaction will be,

(2) The balanced chemical reaction will be,

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

Part 1 :

The unbalanced chemical reaction is,

This reaction is an unbalanced chemical reaction because in this reaction number of atoms are not balanced on both the sides.

In order to balance the chemical equation, the coefficient '9' put before the , the coefficient '2' put before the , the coefficient '5' put before the and the coefficient '3' put before the then we get the balanced chemical equation.

The balanced chemical reaction will be,

Part 2 :

The unbalanced chemical reaction is,

This reaction is an unbalanced chemical reaction because in this reaction number of hydrogen and chlorine atoms are not balanced.

In order to balance the chemical equation, the coefficient '2' put before the then we get the balanced chemical equation.

The balanced chemical reaction will be,

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.