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WorksheetsQuantitative Chem (Topic 3)
Total questions: 20
Worksheet time: 10mins
What is the mass of 3 mol of carbon?
3 g
36 g
4 g
18 g
What is the Mr of water?
18
16
10
36
How many mol of MgO is produced from the reaction of 10 mol of Mg with O2?
2Mg + O2 --> 2MgO
10
2
5
20
The theoretical yield of a reaction is 80 g and the % yield is 90%. What is the actual yield?
72 g
80 g
90 g
88.8 g
Calculate the number of moles of 22 g of carbon dioxide
0.5 mol
1 mol
2 mol
0.25 mol
Calculate the concentration in mol/dm3 when 0.5 mol of NaCl is dissolved in 250 cm3 of water
1 mol/dm3
2 mol/dm3
0.002 mol/dm3
0.125 mol/dm3
What is the concentration in g/dm3 of 0.5 mol/dm3 solution of HCl
18.25
1
36.5
73
Which would have a larger volume, 2 mol of CO2 or 2 mol of O2
they are the same
CO2
O2
What is the mass of 10 mol of water
180 g
1.8 g
18 g
0.5 g
What is the correct equation to calculate moles from a concentration and volume
concentration X volume (dm3)
concentration X volume (cm3)
concentration / volume
volume / concentration
Moles =
mass / Mr
mass X Mr
Mr / mass
Mass =
moles X Mr
Moles / Mr
Mr / moles
A reaction has a 75% yield and makes 300 g. What is the theoretical yield?
400 g
225 g
375 g
500 g
How many moles is 12 cm3 of oxygen (O2)
0.0005
0.5
288
0.375
What is the concentration in g/dm3 when 20 g of NaOH is dissolved in 250 cm3 of water
80 g/dm3
0.08 g/dm3
12.5 g/dm3
5 g/dm3
What is the concentration in mol/dm3 when 20 g of NaOH is dissolved in 250 cm3 of water
2 mol/dm3
0.08 mol/dm3
12.5 mol/dm3
5 mol/dm3
What is the mass of 48 dm3 of O2 gas
64 g
1.5 g
3 g
0.064 g
How many moles is 24 cm3 of N2 gas?
0.001 mol
1 mol
0.85 mol
576 g
How many atoms are there in 1 mol of carbon?
12
6.02 x 1023
6.02 X 1012
0.083
