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WorksheetsCalculation Revision
Total questions: 6
Worksheet time: 3mins
How many oxygens are in CaCO3
1
2
3
4
What is the relative formula mass of HNO3. Mass of N=14 H=1 O=16
75
63
120
100
What is the percentage by mass of Hydrogen in H2O? Mass of H=1 O=16 RFM = 18
11%
30%
50%
75%
A student dissolves 20g of potassium chloride in 100cm³ of water in a beaker. What is the concentration of the solution in g/dm³?
100
0.2
200
10
10.0 g of calcium carbonate, CaCO3, was heated . 5.60 g of solid remained after heating. The equation below represents the reaction:
CaCO3(s) → CaO(s) + CO2(g)
Explain the change in mass.
mass decreased as a gas was produced
mass decreased as the substance reacted with a gas
mass increased as a gas was produced
mass increased as the substance reacted with a gas
Calculate the uncertainty in the table
55
27.5
45
22.5
