Balancing Chemical Equations Concepts

Balancing Chemical Equations Concepts

Assessment

Interactive Video

Chemistry, Science

8th - 10th Grade

Hard

Created by

Emma Peterson

FREE Resource

The video tutorial demonstrates how to balance the chemical equation Fe + O2 yields Fe2O3. It begins by counting the atoms on both sides of the equation, identifying an imbalance. The instructor then explains how to adjust the coefficients to achieve a balanced equation, ensuring equal numbers of iron and oxygen atoms on both sides. The process involves making the number of atoms even, which simplifies balancing. The tutorial concludes with a confirmation of the balanced equation, providing a clear and systematic approach to balancing chemical equations.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

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