Patterns of Chemical Change (Higher 2)

(11)The Haber process is used to produce.....?
Hydrogen
Nitrogen
Ammonia
Oxygen
(12)When a reversible reaction occurs in a closed system, equilbrium is reached when.....?
The pressure is increased
The temperature is decreased
The reaction occurs at exactly the same rate in each direction
The reaction can go both backwards and forwards
(13)In an endothermic reaction, if the temperature is increased, the yield of the products is.....?
Decreased
The same
Nothing
Increased
(14)Ammonium nitrate fertiliser is made by the neutralisation reaction between ammonia and....?
Hydrogen
Nitrogen
Hydrochloric acid
Nitric acid
(15)Atoms of different elements have different.....?
Metals
Masses
Gases
Liquids
(16)Relative atomic mass has.....?
No units
Diamonds
The units of grams
The units of kilograms
(17)The formula mass is the molecular mass....?
Weighed out in grammes, plus 10
Weighed out in grammes, plus 100
Weighed out in grammes
Weighed out in kilograms
(18)To calculate the percentage of a particular element in the compound you do not need to know?
The number of atoms of the element in the compound
Time of day
Formula mass
Formula mass of the whole compound
(19)The formula mass (one mole) of any gas always has a volume of.....?
42dm3 at room temperature
24dm3 at room temperature
22dm3 at room temperature
44dm3 at room temperature
(20)In order to calulate the number of moles you could use the following......?
Mass (in g) X Relative molecular mass
2 X (Mass (in g) X Relative molecular mass)
2 X (Mass (in g) / Relative molecular mass)
Mass (in g) / Relative molecular mass

     

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