Unit 7.1 Assessment

How many atoms of sodium are in this molecule?

• 3
• 2
• 6
• 1

When electricity was ran through water, what gases were released?

• water vapor and oxygen
• hydrogen and sodium
• oxygen and hydrogen
• water vapor and hydrogen

What is this in molecular formula?

• 3H₂O
• H₃O₃

• 3O₆H

• H₂0₃

Matter cannot be _____ or ______.

• created, destroyed
• changed, destroyed
• energy, changed
• flipped, flopped

Which model of matter is most likely a liquid?

• A
• B
• C

Does the equation follow the Law of Conservation of Mass?

• Yes, atoms are equal on both reactants and products
• No, because hydrogens aren't equal on both sides.
• No, because ONLY carbon isn't equal on both sides.
• No, because carbon and oxygen are not equal on both sides.

All of the following are properties of substance except

• Color

• Density

• Odor

• Energy

When a bath bomb is added to water, it begins to ____________________ and release gases.

• dissolve
• evaporate
• melt
• freeze

What happens to the mass in a closed system after the bath bomb is added?

• It increases
• It decreases
• It stays the same
• It doubles

If a gas is more dense than the surrounding air, it will

• Float upward
• Remain at the same level
• Sink downward
• Disperse evenly