EDTECH Worked Example

EDTECH Worked Example

Assessment

Interactive Video

Science

9th - 12th Grade

Hard

Created by

Madison Lowe

FREE Resource

6 questions

Show all answers

1.

FILL IN THE BLANK QUESTION

2 mins • 1 pt

What do both sides of a chemical equation have to have to make a balanced equation?

The same number of _____ of each element on both sides of the yield arrow.

Answer explanation

Because the Law of Conservation of Matter states that matter cannot be created or destroyed in a chemical reaction, there must be the same number of atoms of each element in reatants and the products.

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Balance the chemical equation:

Al₂O₃ --> Al + O₂

Al₂O₃ --> Al + O₂

2Al₂O₃ --> 2Al +2 O₂

2Al₂O₃ --> 4Al + 3O₂

2Al₂O₃ --> 2Al + 5O₂

Answer explanation

2Al₂O₃ --> 4Al + 3O₂ is correct.

On our reactants side, we have:

(2 * 2) = 4 Al atoms

(2* 3) = 6 O atoms

On our product side, we have:

(4 * 1) = 4 Al atoms

(3*2) = 6 O atoms

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Balance the chemcial equation:

Fe + Cl₂ ---> FeCl₃

2Fe + 3Cl₂ ---> 2FeCl₃

Fe + Cl₂ ---> FeCl₃

Fe + 2Cl₂ ---> 2FeCl₃

4Fe + 7Cl₂ ---> 4FeCl₃

Answer explanation

2Fe + 3Cl₂ ---> 2FeCl₃

On our reactants side, we have:

(2 * 1) = 2 Fe atoms

(3 * 2) = 6 Cl atoms

On our product side, we have:

(2 * 1) = 2 Fe atoms

(2 * 3) = 6 Cl atoms

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Balance the chemical equation:

N₂ + H₂ ---> NH₃

3N₂ + 3H₂ ---> 2NH₃

N₂ + H₂ ---> NH₃

2N₂ + 3H₂ ---> 4NH₃

N₂ + 3H₂ ---> 2NH₃

Answer explanation

N₂ + 3H₂ ---> 2NH₃

On our reactants side, we have:

(1 * 2) = 4 N atoms

(3 * 2) = 6 H atoms

On our product side, we have:

(2 * 1) = 2 N atoms

(2 * 3) = 6 H atoms

5.

MULTIPLE CHOICE QUESTION

30 sec • Ungraded

While the GED is a timed test, we are still learning and practicing here. Did you feel like you had enough time to answer each question?

Yes

I had enough time to answer most questions

I didn't have enough time to answer most questions

6.

MULTIPLE CHOICE QUESTION

30 sec • Ungraded

How comfortable do you feel about the topics in this video lesson?

Very confident and comfortable!

I feel comfortable and got most of the questions right

I need more practice

I did not understand and did not do well on the questions