C4 Quantitative Chemistry Flashcards Preview

Combined Chemistry - Paper 1 > C4 Quantitative Chemistry > Flashcards

Flashcards in C4 Quantitative Chemistry Deck (12):
1

1. What elements are there in H2SO4 and how many of each element is there?

1. 2 Hydrogen, 1 Sulphur, 4 Oxygen

2

2. 46g of sodium reacts with 71g of chlorine. Sodium chloride is the only product made. What mass of sodium chloride will be made?

2. 117g

3

3. What is an anomaly?

3. A result that does not fit the pattern – they are caused by random errors.

4

4. Calculate the mean if the three results are: 82, 84 and 83

(82+84+83)/2 = 83

5

5. What should you do with anomalous results when you calculate a mean?

5. Don’t include it in your calculation

6

6. What is the range of this set of results - 82, 84, 83

6. 84-82 = 2

7

7. What is the uncertainty in the measurements 82, 84, 83

7. Range ÷2 = 1

8

8. What is the relative formula mass of water H2O?
(Relative atomic masses: Hydrogen = 1, Oxygen = 16)

8. 18

9

9. What is the unit that we measure mass in?

9. g

10

10. What is the unit that we measure volume in?

10. dm3

11

11. What are the units for concentration?

11. g/dm3

12

12. How many cm3 are in 1dm3?

1000