Recent questions in Chemistry

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What is the chemical formula of rust?

asked Jul 18, 2021 in Chemistry Form 1 by huawei

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1 answer

What is meant by bleaching?

asked Jul 18, 2021 in Chemistry Form 3 by mkaliwao

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1 answer

what is the PH of ammonium nitrate

asked Jul 15, 2021 in Chemistry Form 1 by Fybian

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3 answers

what is deliquescent substance

asked Jul 15, 2021 in Chemistry Form 1 by nissikinyanjui

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1 answer

The above is a simplified diagram of the Downs Cell used for the manufacture of sodium. Study it and answer the questions that follow.

asked Jul 9, 2021 in Chemistry Form 4 by anony mous

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1 answer

Give the name of the reagent which when reacted with concentrated hydrochloric acid produce chlorine gas.

asked Jul 9, 2021 in Chemistry Form 3 by anony mous

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1 answer

Study the flow chart below and answer the questions that follow

asked Jul 9, 2021 in Chemistry Form 3 by anony mous

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1 answer

The scheme below shows several reactions starting with propane. Study the scheme and answer the questions which follow.

asked Jul 9, 2021 in Chemistry Form 4 by anony mous

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1 answer

Aqueous Copper (II) Sulphate was electrolyzed using the set up represented by the diagram below

asked Jul 9, 2021 in Chemistry Form 4 by anony mous

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1 answer

In order to determine the molar heat of neutralization of potassium hydroxide, 200cm3 of 1M Hydrochloric acid and 200cm3 Of IM Potassium hydroxide both at the same initial temperature were mixed and stirred continuously with a thermometer. The temperature of the resulting solution was recorded after every 30 seconds until the highest temperature of the solution was attained. Thereafter, the temperature of the solution was recorded for a further two minutes.

asked Jul 8, 2021 in Chemistry Form 4 by anony mous

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1 answer

Study the data in the table below and answer the questions. The letters do not represent the actual symbols of the elements.

asked Jul 8, 2021 in Chemistry Form 2 by anony mous

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1 answer

If 25.0cm3 of 0.1 MH2S04 solution neutralized a solution containing 1.06g of sodium carbonate in 250cm3 of solution, calculate,

asked Jul 7, 2021 in Chemistry Form 3 by anony mous

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1 answer

Study the flow chart below and answer the questions that follow.

asked Jul 7, 2021 in Chemistry Form 3 by anony mous

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1 answer

3g of 257Lr whose half-life is 8 days, remains after undergoing radioactive decay for 32 days. Find the original amount of substance.

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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1 answer

The chief ore of aluminium is bauxite which mainly contains Al2O3.2H20. The ore is initially purified before aluminium is extracted electrolitically.

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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1 answer

Study the set up below and answer the questions that follow

asked Jul 7, 2021 in Chemistry Form 1 by anony mous

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1 answer

When calcium carbonate was added to a solution of dry hydrogen chloride in methyl benzene there was no observable reaction. Explain.

asked Jul 7, 2021 in Chemistry Form 3 by anony mous

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1 answer

When a current of 0.5 amperes was passed for 32 minutes and 10 seconds through fused chloride of metal P 0.44 of P was deposited. Determine the charge of the ion of metal P. (IF = 96,500C, P =88)

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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1 answer

50cm3 of oxygen gas diffused through a porous plug in 80 secs. How long will it take 100cm3 of sulphur (IV) oxide to diffuse through the same plug? (S = 32 0= 16)

asked Jul 7, 2021 in Chemistry Form 3 by anony mous

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1 answer

The structure below represents a segment of a polymer. Use it to answer the questions that follow.

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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