Flashcards in C4 Quantitative Chemistry Deck (12):

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

### 1. 2 Hydrogen, 1 Sulphur, 4 Oxygen

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## 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

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## 3. What is an anomaly?

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

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

### (82+84+83)/2 = 83

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

### 5. Don’t include it in your calculation

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

### 6. 84-82 = 2

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

### 7. Range ÷2 = 1

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8. What is the relative formula mass of water H2O?

(Relative atomic masses: Hydrogen = 1, Oxygen = 16)

### 8. 18

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

### 9. g

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

### 10. dm3

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## 11. What are the units for concentration?

### 11. g/dm3

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