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12 Which statement correctly describes how matter is conserved in Chemical

Reaction 1?
M. There are three oxygen atoms in the reactants for every three oxygen atoms in the products.
P. There is one hydrogen atom in the reactants for every two hydrogen atoms in the products.
R. There is one carbon atom and one hydrogen atom in the reactants for every three carbon atoms and three hydrogen atoms in the products.
s. There are two carbon atoms and two oxygen atoms in the reactants for every three carbon atoms and three oxygen atoms in the products.
13 Which statement correctly describes how matter is conserved in Chemical
Reaction 2?
A. There are six oxygen atoms in the reactants for every three oxygen atoms in the product.
B. There are two calcium ions in the reactants for every one calcium ion in the product.
C. There are more atoms in the reactants than there are in the product.
D. There is one carbonate ion in the reactants for every one in the product.

1 answer

To determine how matter is conserved in the given chemical reactions, we need to analyze the statements based on the principle of the conservation of mass, which states that the number of each type of atom must be the same on both sides of a chemical equation.

For Chemical Reaction 1:

  1. Statement M: "There are three oxygen atoms in the reactants for every three oxygen atoms in the products."

    • This statement correctly describes conservation since it maintains equal numbers of oxygen atoms.

  2. Statement P: "There is one hydrogen atom in the reactants for every two hydrogen atoms in the products."

    • This statement does not hold true for conservation of mass because it indicates a discrepancy (1 vs. 2 atoms).

  3. Statement R: "There is one carbon atom and one hydrogen atom in the reactants for every three carbon atoms and three hydrogen atoms in the products."

    • This statement suggests a loss of matter (1 vs. 3), which violates conservation of mass.

  4. Statement S: "There are two carbon atoms and two oxygen atoms in the reactants for every three carbon atoms and three oxygen atoms in the products."

    • This statement also suggests a discrepancy in number (2 vs. 3), violating conservation.

Correct Answer for Chemical Reaction 1: M.

For Chemical Reaction 2:

  1. Statement A: "There are six oxygen atoms in the reactants for every three oxygen atoms in the product."

    • This statement is not accurate and violates conservation of mass (6 vs. 3).

  2. Statement B: "There are two calcium ions in the reactants for every one calcium ion in the product."

    • This statement inaccurately represents the number of calcium ions (2 vs. 1) and also violates conservation.

  3. Statement C: "There are more atoms in the reactants than there are in the product."

    • This statement contradicts the law of conservation of mass and is incorrect.

  4. Statement D: "There is one carbonate ion in the reactants for every one in the product."

    • This statement correctly represents conservation, as it maintains equal numbers of carbonate ions.

Correct Answer for Chemical Reaction 2: D.

Summary:

  • Chemical Reaction 1: M (accurate statement regarding oxygen atoms)
  • Chemical Reaction 2: D (accurate statement regarding carbonate ions)