Recent questions in Chemistry Form 3

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1 answer

what is Boyle's law

asked Nov 22 in Chemistry Form 3 by 0745988XXX

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1 answer

what is Boyle's law

asked Nov 22 in Chemistry Form 3 by 0745988XXX

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1 answer

what is the lattice energy

asked Nov 3 in Chemistry Form 3 by 0724925XXX

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what is the lattice energy

asked Nov 3 in Chemistry Form 3 by 0724925XXX

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what is the lattice energy

asked Nov 3 in Chemistry Form 3 by 0724925XXX

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0 answers

what is the lattice energy

asked Nov 3 in Chemistry Form 3 by 0724925XXX

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1 answer

In an experiment a mixture of 126.0cm3 of nitrogen gas and 120.0cm3 of hydrogen gas was heated in the presence of iron catalyst. Determine the composition of the final gaseous mixture.

asked Oct 30 in Chemistry Form 3 by 0758752XXX

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In an experiment a mixture of 126.0cm3 of nitrogen gas and 120.0cm3 of hydrogen gas was heated in the presence of iron catalyst. Determine the composition of the final gaseous mixture.

asked Oct 30 in Chemistry Form 3 by 0758752XXX

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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 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 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 in Chemistry Form 3 by 0715220XXX

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what is the mass of 4480dm³ of nitrogen gas

asked Aug 13 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 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 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 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 in Chemistry Form 3 by 0715220XXX

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1 answer

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 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 in Chemistry Form 3 by 0715220XXX

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2 answers

what's the use of nitrogen one oxide?

asked May 30 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 in Chemistry Form 3 by 0768347XXX

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