Balancing Chemical Equations Concepts

Balancing Chemical Equations Concepts

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Emma Peterson

FREE Resource

In this video, Dr. B demonstrates how to balance the chemical equation for the decomposition of hydrazine (N2H4) into ammonia (NH3) and nitrogen gas (N2). The process involves counting the nitrogen and hydrogen atoms on both sides of the equation and making adjustments to ensure the number of atoms is equal on both sides. The video emphasizes the importance of achieving even numbers of atoms and suggests balancing hydrogen first due to its isolated presence. The final balanced equation is achieved by adjusting coefficients, and the video concludes with a tip to balance nitrogen last when it appears as a standalone molecule.

Read more

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the initial number of nitrogen atoms on the reactant side in the decomposition of hydrazine?

4

3

2

1

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many hydrogen atoms are initially present on the product side before balancing?

2

6

3

4

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step suggested to balance the hydrogen atoms?

Add a coefficient of 3

Add a coefficient of 2

Add a coefficient of 1

Add a coefficient of 4

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

After adjusting the hydrogen atoms, what is the new total of hydrogen atoms on the product side?

12

10

6

8

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What coefficient is suggested to be placed in front of N2H4 to balance the nitrogen atoms?

4

2

1

3

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of changing the coefficient of NH3 to 3?

12 hydrogens

10 hydrogens

8 hydrogens

14 hydrogens

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it suggested to balance hydrogen atoms first in this equation?

Hydrogen is more reactive

Nitrogen is more abundant

Nitrogen is isolated

Hydrogen is easier to balance

Create a free account and access millions of resources

Create resources
Host any resource
Get auto-graded reports
or continue with
Microsoft
Apple
Others
By signing up, you agree to our Terms of Service & Privacy Policy
Already have an account?