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0
votes
1
answer
State and explain the function of tartaric acid in baking powder
asked
Aug 4, 2021
in
Chemistry Form 1
carbon and its compounds
hydrogen carbonates
0
votes
1
answer
Carbon Oxide gas was passed over heated iron III Oxide as shown in the diagram below
asked
Aug 4, 2021
in
Chemistry Form 2
carbon and its compounds
carbon (ii) oxide
0
votes
1
answer
The diagram below shows set-up for preparing hydrogen gas by a Form 3 Student.
asked
Aug 4, 2021
in
Chemistry Form 1
water and hydrogen
hydrogen preparation
0
votes
1
answer
Explain why aluminum is a better conductor of electricity than Sodium
asked
Aug 4, 2021
in
Chemistry Form 2
chemical families patterns in properties
period 3 elements
0
votes
1
answer
A certain mass of gas occupies 0.15dm3 at 20°c and 98,648.5pa, Calculate it volume at 101325pa and 0°c
asked
Aug 4, 2021
in
Chemistry Form 3
gas laws
0
votes
1
answer
In a experiment to determine the percentage of purity of a sample of sodium carbonate, 2.15g of the sample reacted completely with 40cm3 of 0.5m sulphuric (iv) acid
asked
Aug 4, 2021
in
Chemistry Form 3
the mole formulae and chemical equation
0
votes
1
answer
State the types of change that take place in each of the following situations
asked
Aug 4, 2021
in
Chemistry Form 1
simple classification of substances
temporary and permanent changes
0
votes
1
answer
Give 2 reasons why helium is used in weathers baloons
asked
Aug 4, 2021
in
Chemistry Form 2
chemical families patterns in properties
noble gases
0
votes
1
answer
60cm3 of oxygen diffuses through a porous pot in 50 seconds. How long would it take 60cm3 of oxygen gas diffuses through a porous pot in 50sec.How long would it take 60cm3 of Sulphur (iv) oxide to diffuse through the same pot under the same conditions?
asked
Aug 4, 2021
in
Chemistry Form 3
gas laws
0
votes
4
answers
The diagram below represents part of the periodic table use it to answer the questions that follow.
asked
Aug 4, 2021
in
Chemistry Form 2
structure of the atom and the periodic table
0
votes
1
answer
What is rust?
asked
Aug 4, 2021
in
Chemistry Form 1
air and combustion
composition of air
0
votes
1
answer
Briefly outline how you would obtain ethanol from a mixture of ethanol and water.
asked
Aug 4, 2021
in
Chemistry Form 1
simple classification of substances
separation of mixtures
0
votes
1
answer
The diagram shows PH values for several substances.
asked
Aug 4, 2021
in
Chemistry Form 1
acids bases and indicators
0
votes
1
answer
Write balanced equations for the following reactions
asked
Aug 4, 2021
in
Chemistry Form 3
the mole: formulae and chemical equations
0
votes
1
answer
Write down the formula of the following compounds
asked
Aug 4, 2021
in
Chemistry Form 3
the mole formulae and chemical equation
empirical and molecular formulae
0
votes
1
answer
The graph below shows a curve obtained when water at 20℃ was heated for 15 mins.
asked
Aug 4, 2021
in
Chemistry Form 1
simple classification of substances
0
votes
1
answer
Determine the number of sodium ions contained in 25cm3 of 0.5M sodium carbonate solution [a=6.023 x 1023]
asked
Aug 4, 2021
in
Chemistry Form 3
the mole formulae and chemical equation
0
votes
1
answer
The diagram below represents a paper chromatograph for three brands of juices suspected to contain banned food colourings
asked
Aug 4, 2021
in
Chemistry Form 1
simple classification of substances
0
votes
1
answer
answer to electrical current passing through H2SO4 State and explain the change in mass that occur when following substances are separately heated in open crucibles [4 mks]
asked
Aug 4, 2021
in
Chemistry Form 3
nitrogen and its compounds
metals
0
votes
1
answer
The diagram shows electric current passing through dilute sulphuric (iv)acid
asked
Aug 4, 2021
in
Chemistry Form 2
effect of electric current on substances
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