Question

What is always true according to the Law of Conservation of Matter?(1 point) Responses Atoms created during a chemical reaction must have the same mass as the atoms in the reactants. Atoms created during a chemical reaction must have the same mass as the atoms in the reactants. Atoms can be rearranged during a chemical reaction but cannot be added or taken away. Atoms can be rearranged during a chemical reaction but cannot be added or taken away. The total number of molecules before and after a chemical reaction stays the same. The total number of molecules before and after a chemical reaction stays the same. New molecules cannot be formed from the reactants during a chemical reaction. New molecules cannot be formed from the reactants during a chemical reaction. Skip to navigation

Answer 1

According to the Law of Conservation of Matter, the statement that is always true is:

Atoms can be rearranged during a chemical reaction but cannot be added or taken away.

This means that the total mass of the reactants is equal to the total mass of the products, and while atoms may change partners and form new substances, the total number of atoms remains constant throughout the reaction.

Answer 2

A student combines two liquids in a beaker. She observes that the mass of the combined liquid is less than the mass of the two separate liquids. The student claims that this observation shows that matter is not conserved in chemical reactions. Which statement explains why the student’s claim is incorrect?(1 point) Responses The combined liquid was warmer than the two separate liquids. The combined liquid was warmer than the two separate liquids. The reaction produced a gas that escaped the beaker. The reaction produced a gas that escaped the beaker. The product contained fewer atoms than the reactants. The product contained fewer atoms than the reactants. The reaction did not change the physical properties of the liquids. The reaction did not change the physical properties of the liquids. Skip to navigation page 12 of 12

Answer 3

The statement that explains why the student’s claim is incorrect is:

The reaction produced a gas that escaped the beaker.

In this scenario, if a gas is produced during the reaction and escapes into the air, it would result in the combined mass of the liquids being less than the sum of the masses of the two separate liquids, thus giving the incorrect impression that matter is not conserved. The Law of Conservation of Matter holds true, but the measurement did not account for the mass of the gas that escaped.

Answer 4

all were correct if anyones wondering

Answer 5

Thank you for the clarification! In the context of your question, all of those responses could potentially highlight issues with the observations made by the student. However, the most direct explanation regarding the observed mass loss would indeed be that a gas was produced and escaped the beaker, which directly relates to conservation of mass.

The other options could also provide some context but may not be as relevant to the specific observation of mass loss. If you have any additional questions or need further clarification on any topic, feel free to ask!