What is the first step in balancing the equation Fe + O2 yields Fe2O3?

Balancing Chemical Equations Concepts

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Chemistry, Science
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8th - 10th Grade
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Hard

Emma Peterson
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Count the atoms on each side
Add coefficients randomly
Change the chemical formula
Ignore the oxygen atoms
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many iron atoms are needed on the reactant side to balance the equation?
One
Two
Four
Three
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What coefficient should be placed in front of O2 to balance the oxygen atoms?
Four
Three
One
Two
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to have an even number of atoms when balancing equations?
It makes calculations easier
It ensures the equation is correct
It is a rule of thumb
It helps in predicting reactions
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
After balancing, how many oxygen atoms are present on each side of the equation?
Eight
Six
Four
Two
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the balanced chemical equation for Fe + O2 yields Fe2O3?
Fe + O2 = Fe2O3
2Fe + 3O2 = 2Fe2O3
4Fe + 3O2 = 2Fe2O3
4Fe + 2O2 = 2Fe2O3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of coefficients in balancing chemical equations?
They are used for decoration
They alter the atomic structure
They adjust the number of molecules
They change the chemical properties
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