# How much?

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• Created by: Sam Evans
• Created on: 02-01-15 20:49
What name is used for these two types of atom?
Isotopes
1 of 12
How is an atom of 35/17 Cl different from an atom of 37/17 Cl?
35/17 Cl has two fewer neutrons than 37/17 Cl
2 of 12
Hydrogen and iodine react to make hydrogen iodide. The equation for the reaction is: H2 + I2 = 2Hl. What type of reaction is this?
Reversible
3 of 12
What substance in foods can be detected by paper chromatography?
({Artificial} food) colours
4 of 12
What is the relative formula mass of magnesium fluoride, MgF2?
62
5 of 12
What is the mass of one mole of aluminium oxide, Al2O3?
102g
6 of 12
What is the percentage by mass of copper in copper (II) carbonate, CuCO3?
51.4% (51%)
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A student made some magnesium oxide by burning magnesium in air. The student obtained a yield of 55%. Suggest two reasons why the yield was less than 100%
The magnesium did not all react and magnesium oxide was lost
8 of 12
What is the empirical formula of vanadium oxide that contains 56% of vanadium?
V2O5
9 of 12
Calculate the mass of zinc chloride that you can make from 6.5g of zinc. Zn + 2HCl -> ZnCl2 + H2
13.6g
10 of 12
Calculate the percentage yield if 9.0g MgSO4 was made from 4.0g MgO
75%
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What information can be obtained from the molecular ion peak in a mass spectrum?
Relative molecular mass (of the compound)
12 of 12

## Other cards in this set

### Card 2

#### Front

How is an atom of 35/17 Cl different from an atom of 37/17 Cl?

#### Back

35/17 Cl has two fewer neutrons than 37/17 Cl

### Card 3

#### Front

Hydrogen and iodine react to make hydrogen iodide. The equation for the reaction is: H2 + I2 = 2Hl. What type of reaction is this?

### Card 4

#### Front

What substance in foods can be detected by paper chromatography?

### Card 5

#### Front

What is the relative formula mass of magnesium fluoride, MgF2?