
Understanding Chemical Reactions and Equations
Interactive Video
•
Chemistry
•
9th - 10th Grade
•
Hard
Jennifer Brown
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the starting substances in a chemical reaction called?
Catalysts
Reactants
Inhibitors
Products
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of a chemical equation?
To show the physical state of substances
To represent the energy change in a reaction
To depict the molecules before and after a reaction
To measure the temperature change in a reaction
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of the plus sign in a chemical equation?
It indicates a reversible reaction
It separates different reactants or products
It represents the energy change
It shows the direction of the reaction
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What do coefficients in a chemical equation represent?
The speed of the reaction
The energy required for the reaction
The number of molecules involved
The temperature at which the reaction occurs
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the law of conservation of mass state?
Mass is lost during a chemical reaction
Mass is gained during a chemical reaction
Mass is irrelevant in a chemical reaction
Mass remains constant during a chemical reaction
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is conserved during a chemical reaction according to the video?
The temperature
The volume of reactants
The number of atoms
The number of molecules
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can we balance the number of oxygen atoms in the reaction of H2 and O2 forming H2O?
By removing H2 molecules
By adding more O2 molecules
By changing the formula of water
By doubling the number of H2O molecules
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