Which best represents the reaction of calcium and zinc carbonate (znco3) to form calcium carbonate (caco3) and zinc?

2 answers:

7 0

The reaction of calcium and zinc carbonate yields calcium carbonate and zinc. To balance, we should remember that the number of atoms of each element in the reactants and products side should be equal. The balanced chemical reaction is written as follows:

Ca + ZnCO3 = CaCO3 + Zn

Alona [7]3 years ago

3 0

Answer : The balanced chemical reaction will be,

$Ca+ZnCO_3\rightarrow CaCO_3+Zn$

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.

If the amount of atoms of each type on the left and right sides of a reaction differs then to balance the equation by adding coefficient in the front of the elements or molecule or compound in the chemical equation.

The coefficient tell us about that how many molecules or atoms present in the chemical equation.

As per question, when calcium react with zinc carbonate then it react to give calcium carbonate and zinc as a product.

The balanced chemical reaction will be,

$Ca+ZnCO_3\rightarrow CaCO_3+Zn$

This reaction is a single replacement reaction in which the most reactive elements displaces the least reactive element from its solution.

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The boiling points for the homonuclear diatomic molecules in the halogen family are 85 K, 238 K, 332 K, 457 K and 610 K. Which s

patriot [66]

Answer:

$Cl_{2}$ has boiling point of 238 K

Explanation:

Boiling point depends on different intermolecular force such as molecular wight, dipole-dipole attraction force, hydrogen bonding, ionic attraction force.

Homonuclear diatomic molecules are covalent non-polar molecules and thereby free from dipole-dipole attraction force, hydrogen bonding and ionic interaction forces.

Hence, boiling point of homonuclear diatomic molecules depends solely on molecular weight.

We know, higher the molecular weight of a molecule, higher will be its boiling point. This phenomenon can be realized in terms of increasing london dispersion force with increase in molecular weight.

Decreasing order of molecular weight of halogen molecules :

$I_{2}$ > $Br_{2}$ > $Cl_{2}$ > $F_{2}$