Review Week 13 Quiz: - Bonding and Chemical Reactions

First Name

Last Name

Period

• 1
• 2
• 3
• 4
• 5

A student conducting an experiment reacted 50 grams of vinegar with 2 grams of baking soda in a flask covered by a balloon as shown. After the reaction was complete the student weighed the reaction and found it to weigh 50 grams. Which of the following is true

• The reaction gained mass by forming new products
• The reaction maintained the law of conservation of mass
• The law of conservation of mass was invalid, the reaction lost mass by some of the gas escaping

What is a limiting reactant?

• the reactant that determines how much product can be made
• the reactant that is in excess
• the amount of reactants that react with each other

Atoms are most stable when they have ________valence electrons in their outermost energy level

• 6
• 7
• 8
• 10

Based on the chemical reaction below, how many molecules of Oxygen (O2) react with 3 molecules of Methane (CH4)? hint how many oxygen molecules do you need for one methane molecule?

• 4
• 8
• 6
• 2

If the below reaction produces 180 grams of total products (CO2 and H2O), how many grams of O2 is reacting with 28 grams of methane (CH4).

• 152 grams
• 162 grams
• 208 grams

A student examined the reaction by changing the temperature of the reaction. The time it took for the reaction was recorded. What is the relationship between temperature and the reaction rate?

• The reaction rate decreased as the temperature increased because particles move faster at higher temperatures.
• The increase in temperature of reactants caused more molecule collisions, which increased the reaction rate.
• The increase in temperature lowered the energy in the reaction, so the rate decreased as well.

Which of the following could Oxygen bond with to have a complete octet?

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