Recent questions in Chemistry

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4 answers

what is an isotope?

asked Oct 27, 2023 in Chemistry Form 2 by 0112153XXX

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10 answers

what is an isotope?

asked Oct 27, 2023 in Chemistry Form 2 by 0112153XXX

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3 answers

what is an isotope?

asked Oct 27, 2023 in Chemistry Form 2 by 0112153XXX

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15 answers

why most of laboratory apparatus are made of glass

asked Oct 17, 2023 in Chemistry Form 1 by 0721790XXX

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7 answers

uses of calcium chloride in solvay process

asked Oct 13, 2023 in Chemistry Form 2 by 0741379XXX

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16 answers

asked Oct 2, 2023 in Chemistry Form 2 by 0725957XXX

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1 answer

what property make aluminium oxide and silicon iv oxide react with sodium hydroxide solution

asked Aug 24, 2023 in Chemistry Form 4 by 0724816XXX

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1 answer

state why bauxite is first crushed and ground into smaller particles

asked Aug 24, 2023 in Chemistry Form 4 by 0724816XXX

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1 answer

starting with sodium hydroxide, describe how a solid sample of sodium hydrogen carbonate can be prepared in the laboratory

asked Aug 23, 2023 in Chemistry Form 2 by 0794960XXX

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2 answers

calculate the relative molecular mass of the following gases from the information given 0.4 g of oxygen is 288 and interstate at STP

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

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4 answers

how many molecules of gas are contained in 5 dm³ cubed of hydrogen at STP

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

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0 answers

an evacuated flask has a mass of 90.050 grams when filled with gas at STP the plus 2 is 19.121 grams if the volume of the flask was 22.2 centimetres cubed calculate the relative molecular mass of gas-x and suggest is identity

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

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0 answers

what is the mass of 4480dm³ of nitrogen gas

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

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0 answers

a mass of 5.125 g washing soda crystals are disacsolved and made up to 250 CM3 of solution at 25.07% of the solution required 35.8 CM3 of 0.05 molar sulphuric VI acid for neutralization calculate the percentage of sodium carbonate in the crystals

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

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3 answers

what is the mass of 22.4 l of ammonia

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

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0 answers

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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0 answers

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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0 answers

you are provided with -2.0m sodium hydroxide solution labelled solution B- solution Containing 12.25g per litre of an mineral acid you're required to prepare a dilute solution of sodium hydroxide solution B. Determine the relative formula mass of the acid molar enthalpy change of reaction between acid C and sodium hydroxide solution B

asked Jul 20, 2023 in Chemistry Form 4 by 0731373XXX

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