Chemistry Final Review Day 2

Front

What is the effect of removing CO₂ from the reaction: heat + CaCO₃(s) ⇔ CaO(s) + CO₂(g)?

Back

Removing CO₂ shifts the reaction to the right, increasing the production of calcium oxide (CaO).

Front

Why is powdered calcium carbonate preferred over solid tablets in reactions?

Back

Powdered calcium carbonate has a greater surface area, allowing more of it to be available for the reaction.

Front

What are gamma radiation particles emitted by radioactive isotopes used for in medicine?

Back

They are used in nuclear imaging technology to produce images of internal body structures.

Front

What is the average atomic mass of copper based on its isotopes?

Back

The average atomic mass of copper is 63.6 amu.

Front

What happens to the chemical reaction of ammonia when hydrogen (H₂) is removed?

Back

The reaction shifts to the left, favoring the formation of reactants.

Front

What is Le Chatelier's Principle?

Back

Le Chatelier's Principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change.

Front

Define isotopes.

Back

Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the significance of surface area in chemical reactions?

Back

Increased surface area allows more particles to collide, increasing the rate of reaction.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst speeds up a chemical reaction without being consumed in the process.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.