Calculate the volume, mass and number of molecules of hydrogen
|
|
1
|
10784
|
October 19, 2016
|
Uppose that you are asked to calculate the amount of aluminium,
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1
|
1066
|
October 19, 2016
|
How do we know that a chemical reaction has taken place?
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0
|
4014
|
October 19, 2016
|
What change we observe by mixing of sodium sulphate and barium chloride?
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0
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1851
|
October 19, 2016
|
Write an activity when calcium oxide reacts with water
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0
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1302
|
October 19, 2016
|
Why do we apply paint on iron articles?
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0
|
975
|
October 19, 2016
|
Freshly cut apple turning brown
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1
|
734
|
October 19, 2016
|
Why the white washing gives shiny finish to the walls?
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0
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10100
|
October 19, 2016
|
What is oxidation-reduction reaction or redox reaction ? Give one example
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0
|
593
|
October 19, 2016
|
What is an alloy?
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0
|
3658
|
October 19, 2016
|
What is chemical change?
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0
|
498
|
October 19, 2016
|
What is a balanced chemical equation?
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0
|
476
|
October 19, 2016
|
What is the use of keeping food in air tight containers?
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0
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5241
|
October 19, 2016
|
Explain rancidity
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0
|
960
|
October 19, 2016
|
What do you mean by corrosion ? How can you prevent it?
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0
|
3484
|
October 19, 2016
|
In the refining of silver
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1
|
1027
|
October 19, 2016
|
Give two examples for oxidation - reduction reaction
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0
|
4151
|
October 19, 2016
|
Name the reactions taking place in the presence of sunlight
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0
|
6390
|
October 19, 2016
|
What do you mean by precipitation reaction?
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0
|
833
|
October 18, 2016
|
Write the balanced chemical equations for the following reactions
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1
|
4601
|
October 18, 2016
|
What symbols do we use to indicate the physical state of reactants and products in an equation?
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0
|
1663
|
October 18, 2016
|
Write some chemical reactions occurring in our daily life
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0
|
563
|
October 18, 2016
|
What are the important characteristics of chemical reactions?
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0
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3602
|
October 18, 2016
|
What are the effects of oxidation on everyday life?
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0
|
2794
|
October 18, 2016
|
How do you write a chemical equation?
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0
|
5225
|
October 18, 2016
|
What do you observe during chemical change?
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|
0
|
560
|
October 18, 2016
|
What do you mean by "rancidity"?
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|
0
|
2764
|
October 18, 2016
|
What is corrosion?
|
|
0
|
10280
|
October 18, 2016
|
What is a reduction ? Give examples
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|
0
|
2951
|
October 18, 2016
|
What is oxidation ? Give examples
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|
0
|
6535
|
October 18, 2016
|