What does the law of conservation of mass state about atoms in a chemical reaction?
How To Balance Equations - Part 1

Interactive Video
•
Chemistry
•
9th - 12th Grade
•
Hard
J. Coronado
FREE Resource
5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Atoms change their elemental nature.
Atoms are rearranged but conserved.
Atoms are destroyed.
Atoms are created from other elements.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What must remain the same on both sides of a chemical equation?
The number of molecules
The types of molecules
The number of each type of atom
The physical state of the compounds
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you balance a chemical equation when the atoms do not initially balance?
Ignore the imbalance as it is usually minor
Add catalysts to the reaction
Adjust the coefficients in front of the compounds
Change the subscripts in the compounds
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the formula '3 O2', what does the subscript '2' indicate?
There are two molecules of oxygen.
There are three oxygen atoms.
Each molecule has two oxygen atoms.
The oxygen is doubled in reaction.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If you have two Na2O molecules, how many sodium atoms are there?
Two sodium atoms
Six sodium atoms
Four sodium atoms
Eight sodium atoms
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