Chemical Reactions Review

All of the following would be conclusions from the Electrolysis experiment EXCEPT:

• More energy is being stored in the products of the initial reaction

• Energy was released in the reverse reaction

• There was 4 times more hydrogen gas produced than oxygen gas in the initial reaction

• The Law of the Conservation of Matter was demonstrated

What is in our poop? Mark all that apply.

• 75% water

• undigested food

• bacteria

• carbon dioxide

What is in our pee? Mark all that apply

• Nitrogen (N)

• 95% water

• Lots of bacteria

• Urea

Looking at the atoms that we put into our body, and the atoms that come out of our body we see that the law of conservation of matter applies to the things we eat.

• True

• False

How many electrons are in the first orbital for it to be "full"?

How many electrons would there be in the second and third orbitals if the octet rule was followed?

• 2

• 4

• 6

• 8

If the potential energy of the reactants is lower than the potential energy of the products then energy is _________.

• Released to the surroundings

• Added to the system.

Which of these statements are true about Chemical Reactions? Mark all that apply

• New substances form but matter is not created

• There is no change in energy from reactants to products

• There is always a change in energy from reactants to products

• Matter is rearranged

Which of these are polymers? Mark all that apply.

• Carbohydrates

• Proteins

• Starch

• Glucose

Which macromolecules contain C, H, and O? Mark all that apply

• Carbohydrates

• Proteins

• Lipids