PE 1b Test Prep

Imagine Nico, Jasper, and Ian are playing a game of 'Chemistry Whiz'. They come across a challenge where they need to correctly identify the AMU of Nitrogen. Who is correct?

• Nico says it is 7

• Jasper thinks it is 14.007

• Ian believes we don't have enough information.

• Or, all they all correct?

Diego is solving the following chemistry equation:

2H₂ + 1O₂ → 2H₂O.

He thinks the reactant (left) and product (right) side have an equal amount of hydrogen atoms. Is Diego correct?

• Yes

• No

Monty is also solving the same equation:

2H₂ + 1O₂ → 2H₂O.

He thinks the reactant (left) and product (right) side don't have an equal amount of oxygen atoms. Is Monty correct?

• Yes

• No

Lewis and Clover are having a friendly debate. They are trying to figure out the mass of H₂. Can you help them out?

• The mass is 1.0078

• We don't have enough information

• The mass is 2.0156

Imagine Elijah is a tiny scientist exploring the world of atoms during a chemical reaction. After looking at the total mass of both sides, was mass created or destroyed?

• Atoms remain unchanged, just like their adventurous spirit

• Atoms were destroyed, like their fear of the unknown

• Atoms were created, like their new discoveries

• Atoms were rearranged, like their scientific theories

Now Elena and Isabella want to balance the previous chemical equation. Does this equation have coefficients?

• Yes

• No

Emilio knows there are invisible coefficients.

What are the coefficients?

Caleb has balanced the equation using structural formulas. What are the new coefficients at the bottom?

Miss Ana and Mr. Ring are playing 2K25. She chose the Los Angeles Reactants and he chose the Los Angeles Products. Miss Ana chose Al + O₂ as teammates and Mr. Ring chose Al₂O₃ as teammates_. If you're the coach how would you draw this on your whiteboard?

• Al + O₂

• Al₂O₃

• Al + O₂ → Al₂O₃

• Al₂O₃ → Al + O₂

Now you are the ref. Before the game begins, both teams must be balanced. Can the Los Angeles Reactants add 1 oxygen atom?

Al + O₂ → Al₂O₃

• No, that's a TECHNICAL FOUL!

• Yes