What does the Law of Conservation of Mass state

Question

Responses:

Matter is neither created or destroyed in a chemical reaction, only rearranged.

The total mass of all of the reactants prior to a chemical reaction must equal the total mass of all the products after the reaction.

Matter cannot be rearranged during a chemical reaction.

The total mass of reactants prior to a chemical reaction is greater than the mass of the product due to the release of energy.

Answer 1

The Law of Conservation of Mass states that:

1. Matter is neither created nor destroyed in a chemical reaction, only rearranged.
2. The total mass of all of the reactants prior to a chemical reaction must equal the total mass of all the products after the reaction.

Both of these statements reflect the Law of Conservation of Mass, emphasizing that in any chemical reaction, the mass remains constant, although the arrangement of atoms may change.

The other two statements are incorrect concerning the law.

Answer 2

f the mass of elements before a chemical reaction is 30 grams, after the chemical reaction, the mass will be __. (1 point)
Responses:

0 grams

30 grams

32 grams

28 grams

Answer 3

The mass after the chemical reaction will be 30 grams. According to the Law of Conservation of Mass, the total mass of the reactants must equal the total mass of the products in a chemical reaction.

Answer 4

2 grams of potassium (K) reacts with 5 grams of Oxygen (O). According to the Law of Conservation of Mass, how many grams of potassium oxide (K2O) will be produced? (1 point)
Responses

5 grams

10 grams

7 grams

2 grams

Answer 5

According to the Law of Conservation of Mass, the mass of the products must equal the mass of the reactants.

In this case, you have:

• 2 grams of potassium (K)
• 5 grams of oxygen (O)

Adding these together gives you a total of 7 grams of reactants.

Therefore, the mass of potassium oxide (K2O) produced will be 7 grams.

Answer 6

Which of the following equations demonstrates the Law of Conservation of Mass
Responses:

CH4+O2→CO2+HO

CH+O2→CO2+H2O

CH4+O2→C+2H2O

CH4+O2→CO2+H2O

Answer 7

The equation that demonstrates the Law of Conservation of Mass is:

CH₄ + O₂ → CO₂ + H₂O

This equation shows that the number of atoms of each element on the reactant side (left) is equal to the number of atoms of each element on the product side (right), complying with the Law of Conservation of Mass.

In this balanced equation:

• 1 carbon (C) atom on both sides
• 4 hydrogen (H) atoms on both sides
• 2 oxygen (O) atoms on both sides

The other equations may not be balanced and could violate the law if the atoms on both sides do not match.