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Chemistry calculations Knowledge Organiser (RGSHW)2025-2026

Last updated about 3 hours ago

25 questions

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Question 1

1.

What is the relative atomic mass (ram or Ar)?

Question 2

2.

In a balanced chemical equation, how is mass conserved?

Question 3

3.

What is the relative formula mass (rfm or Mr) of a molecule?

Question 4

4.

What does the law of Conservation of Mass state?

Question 5

5.

In the example of 2 Na + Cl2 → 2 NaCl, how is mass conserved?

Question 6

6.

What can lead to a perceived loss in mass during a reaction?

Question 7

7.

What is a mole and what is the Avogadro constant?

Question 8

8.

How can chemical equations be interpreted in terms of moles?

Question 9

9.

What is a limiting reagent?

Question 10

10.

What is the concentration of a solution?

Question 11

11.

What are titrations used for?

Question 12

12.

How do you convert cm3 to dm3?

Question 13

13.

What is the volume of one mole of any gas at RTP?

Question 14

14.

What is atom economy?

Question 15

15.

Why do reactions not always go to completion in reality?

Question 16

16.

What is the percentage yield of a chemical reaction?

Question 17

17.

Write the first triangle as a formula: moles =

Question 18

18.

Write the 2nd triangle as a formula: particles =

Question 19

19.

Write the 3rd triangle as a formula concentration =

Question 20

20.

Write the 4th triangle as a formula concentration =

Question 21

21.

How do you convert from mol / dm3 to g/dm3?

Question 22

22.

How do you convert from g/dm3 to mol/dm3?

Question 23

23.

How do you convert from mol / dm3 to g/dm3?

Question 24

24.

Write out the formula for % Yield =

Question 25

25.

Write out the formula for % atom economy =