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Calculate the volume of hydrogen sulphide measured at 15 degree celcus and 1 atm pressure which will react with a solution containing 4g of copper sulphide
PV = n RTn = 4/95.611 = 0.041 molT = 15⁰C = 288K1×V = 0.041 × 0.0821 × 288V = 0.96L
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The compound lithium carbonate, used to treat manic depression, has the formula of Li2CO3. Calculate the number of formula units of lithium carbonate present in a 0.500g sample of lithium carbonate.
Molar mass of Li2CO3 = 73.891 g/mol0.5/73.891= 0.0068moles
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sulphur mixed with hydrogen sulphide what is result.
Nothing will happen if sulfur is mixed with hydrogen sulphide, but if sulfur is mixed with Na2S and heated we'll have according to the equation nS + Na2S = Na2S(n+1)...
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you are given a powdered mixture of sulphur,potassium nitrate and carbon.state briefly how could you separate and collect each constituent in solid or powdered form?
1. Dissolve the mixture in enough quantity of water – KNO3 will dissolve. 2. Filter the solution and evaporate filtrate carefully – you’ll get KNO3 solid. 3. Heat gentle dried mixture of C...
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What is the balanced equation to a solution of nitrate is combined with a solution of sodium carbonate to produce sodium nitrate solution and solid silver carbonate
Na2CO3 + 2AgNO3 = Ag2CO3 + 2NaNO3
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A 0.4230 g sample of impure sodium nitrate was heated, converting all the sodium nitrate to .1235 g of sodium nitrate and oxygen gas. Determine the percent of sodium nitrate in the original sample.
Answer:2HNO3 = 2HNO2 + O2m= 85 x 0.1235 / 69= 0.1521W%= 0.1521 / 0.4230 = 36%
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Which of the above equilibria is forced to shift furthest to the left? Explain.
- Lead nitrate and Sodium chloride
- Lead chloride and Sodium chromate
-Lead chromate and Sodium sulphide
Answer: Combination which makes less soluble product shift towards left side of the equation.Pb(NO3)2 + 2NaCl = PbCl2 + 2NaNO3PbCl2 + Na2CrO4 = PbCrO4 + 2NaClPbCrO4 + Na2S = PbS...
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explain how you would obtain solid sodium carbonate from a mixture of lead (II) carbonate and sodium carbonate.
As both sodium carbonate and lead carbonate both are solid but their solubility are different due to presence of cations. As in sodium carbonate sodium is the cation which is...
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Is potassium hyrdogen carbonate + hydrogen chloride -> potassium chloride + water + carbon dioxide a combustion reaction
No.Combustion reaction - ecsotermical prosecc, with intensiv burn energy (May be hv)this would be called neutralisation, if you take equivival ammount. Also or acid-base reaction
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The heat of combustion of sulphur in excess air to produce sulphur(iv)oxide is -297KJmol^-1. Calculate the heat change if 6.4g of sulphur is completely burned in excess air.(S=32)
While combustion of 1 mol of sulfur 297kJ/mol is released.From a given mass we found actual number of moles: n=m/M.n=6.4/32=0.2 (moles).∆H=0.2×(-297)=-59.4 (kJ/mol).
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