Recent questions in Chemistry Form 3

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asked Aug 13, 2023 in Chemistry Form 3 by 0715220XXX

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a 1 gram sample of limestone was allowed to react with 100 CM3 of 0.1 molar hydrochloric acid the excess acid required 24.8 centimetres cubed of 0.1 molar sodium hydroxide solution calculate the percentage of calcium carbonate in the limestone

asked Aug 13, 2023 in Chemistry Form 3 by 0715220XXX

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1 answer

what volume of hydrogen is evolved when 20 g of zinc is reacted with excess dilute sulphuric VI acid at STP

asked Aug 13, 2023 in Chemistry Form 3 by 0715220XXX

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2 answers

what mass of copper 2 oxide will just neutralize dilute nitric 5 acid containing 3.15 g off pure nitric 5 acid dissolved in water

asked Aug 13, 2023 in Chemistry Form 3 by 0715220XXX

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calculate the molarity of hydroxide ions in a solution prepared by dissolving 2.8 g of sodium hydroxide in enough water to make 1 l of solution

asked Aug 13, 2023 in Chemistry Form 3 by 0715220XXX

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2 answers

what's the use of nitrogen one oxide?

asked May 30, 2023 in Chemistry Form 3 by 0792151XXX

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1 answer

In an experiment an unknown mass of anhydrous sodium carbonate was dissolved in water and the solution made up to 250cm³. 25cm³ of this is neutralised 20cm³ of 0.25M nitric acid. (Na=23.0,C=12.0,O=16.0) calculatea)moles of nitric acid used.b)moles of sodium carbonate in 25cm³ of the solution.c) mass of unknown sodium carbonate level

asked May 5, 2023 in Chemistry Form 3 by 0768347XXX

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4 answers

on complete combustion on oxygen of 0.42grams of gaseous hydrocarbon x,it gave 1.32grams of carbon dioxide and 0.54grams of water determine the empirial formula

asked Apr 29, 2023 in Chemistry Form 3 by 0740744XXX

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11 answers

state Charles law

asked Mar 31, 2023 in Chemistry Form 3 by sophinenaliakanyongXXX

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3 answers

what is a mole

asked Mar 20, 2023 in Chemistry Form 3 by 0719355XXX

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1 answer

ostward process

asked Mar 18, 2023 in Chemistry Form 3 by 0702797XXX

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1 answer

define molar gas volume

asked Mar 17, 2023 in Chemistry Form 3 by 0740458XXX

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4 answers

State the grahams law

asked Feb 11, 2023 in Chemistry Form 3 by 0759082XXX

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1 answer

a small crystal of potassium manganate (VII) eas placed in a beaker water. the beaker was left standing for 2 days without standing. State and explain the observations made

asked Feb 11, 2023 in Chemistry Form 3 by 0759082XXX

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0 answers

the flow chart below illustrates two industrial processes

asked Jan 20, 2023 in Chemistry Form 3 by 0743410XXX

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2 answers

In an experiment,60 cubic cm of oxygen diffused a porous pot in 10seconds and 100 cubic cm of chlorine diffused the same porous pot in 30seconds. If density of oxygen is 1.25 calculate density of chlorine

asked Jan 19, 2023 in Chemistry Form 3 by 0113294XXX

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3 answers

Why is it not advisable to dispose off Hydrogen Sulphide gas by burning?

asked Dec 1, 2022 in Chemistry Form 3 by 0115284XXX

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3 answers

What observations are made when Hydrogen Sulphide gas is bubbled through acidified Potassium Dichromate(VI) solution?

asked Dec 1, 2022 in Chemistry Form 3 by 0115284XXX

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Hydrogen Sulphide gas was passed through water forming a saturated solution which was left exposed to air. What were the observations made?

asked Dec 1, 2022 in Chemistry Form 3 by 0115284XXX

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2 answers

when ammonia is reacted with nitric (v)acid ,it produces a nitrogenous fertiliser .(I) explain why fertilisers play a major role in food production .(ii) state two problems associated with the use of nitrogenous fertilisers.

asked Oct 3, 2022 in Chemistry Form 3 by 0717903XXX

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