Questions by anony mous

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1 answer

State Newton's second law of motion. (1 mark) A resultant force of 10N acts on a body of mass 0.4kg starting from rest. Find the distance travelled after 10 seconds.

asked Jul 13, 2021 in Physics Form 3

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1 answer

A pointer attached to a spring balance points to 21.5 cm on a scale when no weight is suspended from it. When a mass of 165g is hanged from it, it points 38.0 cm.

asked Jul 13, 2021 in Physics Form 2

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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

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

asked Jul 9, 2021 in Chemistry Form 3

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Study the flow chart below and answer the questions that follow

asked Jul 9, 2021 in Chemistry Form 3

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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

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

asked Jul 9, 2021 in Chemistry Form 4

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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

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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

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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

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

asked Jul 7, 2021 in Chemistry Form 3

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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

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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

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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

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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

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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

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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

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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

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1 answer

Identify the following cleansing agents

asked Jul 7, 2021 in Chemistry Form 4

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1 answer

A gaseous compound consists of 86% carbon and 14% hydrogen by mass. At s.t.p, 3.2dm3 of the compound has a mass of 6g. (C = 12 H = 1 molar gas volume at s.t.p = 22.4dm3)

asked Jul 7, 2021 in Chemistry Form 3

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