WorksheetsC3 Quantitative Chemistry - Combined Higher
Total questions: 24
Worksheet time: 24mins
What is the conservation of mass?
That atoms cannot be created or destroyed
That atoms have different masses
That atoms can be created and destroyed
That atoms have different proton numbers and masses
Balance the equation: NaOH + H2SO4 --> Na2SO4 + H2O
2NaOH + H2SO4 --> Na2SO4 + 2H2O
NaOH + H2SO4 --> Na2SO4 + 2H2O
2NaOH + H2SO4 --> Na2SO4 + H2O
2NaOH + 2H2SO4 --> 2Na2SO4 + 2H2O
When a metal forms a metal oxide, why does the mass increase?
Because oxygen atoms have been added
Because metal atoms have been added
Because oxygen atoms have been deducted
Because metal atoms have been deducted
When an acid reacts with a metal, why does the mass decrease?
Because a gas is produced and escapes
Because a metal salts are produced which are lighter
It doesn't decrease, it stays the same
What is relative formula mass?
The sum of the relative masses of each atom in a compound
The multiplication of the relative masses of each atom in a compound
The division of the relative masses of each atom in a compound
The average of the relative masses of each atom in a compound
What are the four state symbols and what do they stand for?
(s) solid (l) liquid (g) gas (aq) aqueous
(S) solid (L) liquid (G) gas (Aq) aqueous
(so) solid (li) liquid (ga) gas (aq) aqueous
(So) solid (Li) liquid (Ga) gas (Aq) aqueous
What symbol do we use for relative formula mass?
Mr
Ar
RMr
RFMr
Calculate the Mr of Ba(OH)2
137 + 16 + 1 = 154
137 + (16+1)x2 = 171
137 + (16+1)x3 = 188
137 + (16 x 2) + (1 x 2) = 177
What is a mole?
A number of particles, atoms or molecules
A furry animal
A number which is too big to write down as a whole number
A number of parts in a substance
What is Avogadro's number?
6.02 x 1023
3.01 x 1023
6.02 x 1024
3.01 x 1024
How many atoms are in 2 moles of any substance?
6.02 x 1023
12.022 x 1023 or 1.2022 x 1024
3.01 x 1023
18.06 x 1023 or 1.806 x 1024
What is the molar mass of 3 moles of H2O?
(3 x 18g/mol) = 54g
(3 x 10g/mol) = 30g
1+1+16 = 18g
1+1+8 = 10g
What formula relates moles, mass and Mr?
Moles = mass x Mr
Moles = mass/Mr
Moles = mass + Mr
Moles = mass - Mr
In a given reaction, what mass of Fe is formed from 150g of Fe2O3?
= 105g
= 100g
= 95g
= 90g
In a given reaction, what mass of Al is formed from 22t of Al2O3?
= 11.6 t
= 12.6 t
= 13.6 t
= 14.6 t
What is a limiting reactant?
A reactant that does not have enough mass to react with all the product
A reactant that has enough mass to react with all the product
In a given reaction, 5.2g of Mg reacts with 5.8g of HCl. Which is the limiting reactant?
Mg
Cl
H2O
MgCl
What is the unit for concentration?
g/dm3
g/cm3
mg/dm3
mg/cm3
Which formula relates concentration, mass and volume?
concentration = mass/volume
concentration = mass + volume
concentration = mass - volume
concentration = mass x volume
What is the concentration of a solution with 5g of solute in 100dm3?
0.05g/dm3
0.5g/dm3
5g/dm3
50g/dm3
What mass of solute is present in a solution with a concentration of 4g/dm3 and volume 5dm3?
20g
2g
0.2g
0.02g
What is the volume of a solution with 10.5g of solute and a concentration of 6.2g/dm3?
1.7dm3
17dm3
0.17dm3
0.017dm3
If the amount of solute in a solution is increased, what happens to its concentration?
Increases
Decreases
If the volume of water in a solution is increased, what happens to its concentration?
Increases
Decreases
