Relative Formula Mass Calculations

Relative Formula Mass Calculations

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains how to calculate the relative formula mass of molecules. It begins with an introduction to the concept, followed by a detailed example using sodium carbonate. The tutorial then addresses more complex calculations involving brackets with calcium hydroxide. Finally, it summarizes the steps involved in calculating the relative formula mass, emphasizing the importance of using the periodic table and verifying calculations.

Read more

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary goal of finding the relative formula mass?

To determine the weight of a single atom

To find the relative mass of a molecule

To measure the volume of a liquid

To calculate the density of a substance

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the example of sodium carbonate (Na2CO3), how many sodium atoms are present?

Three

Two

Four

One

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the atomic mass of carbon as used in the sodium carbonate example?

40

23

12

16

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the mass of oxygen used in the sodium carbonate calculation?

40

23

16

12

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you determine the number of atoms in a molecule when there are brackets involved?

Multiply the number of atoms inside the brackets by the number outside

Add the numbers inside and outside the brackets

Count each atom individually

Ignore the brackets

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the relative formula mass of calcium hydroxide (Ca(OH)2)?

32

40

106

74

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it recommended to use a calculator even for simple additions?

To ensure accuracy

To practice calculator skills

To save time

To avoid mental math

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?