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Its C?View attachment 63820
How to do this? Im having paper 1 in 3 days and stressing out right now because of this question:'( Help
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Its C?View attachment 63820
How to do this? Im having paper 1 in 3 days and stressing out right now because of this question:'( Help
The answer is DIts C?
View attachment 63820
How to do this? Im having paper 1 in 3 days and stressing out right now because of this question:'( Help
The answer is D
Enthalpy change of reaction= 3(+111) + (+822) +3(-394) = -27this one as well. the ans is B
ans is D?
Thanx!I didn't included the hydrogen to make it more clear.
View attachment 63829
No problemThanx!
thankyouEnthalpy change of reaction= 3(+111) + (+822) +3(-394) = -27
55.8g is 1 mole. Since ΔH for this reaction is for 2 moles, so divide it by 2 to get -13.5
thanks a lotApart from guess work i mean trying the options one by one I can not find any other way.
X + H2O------>Al(OH)3 + hydrocarbon gas(HC)..unknown
HC(g) + O2------>H2O + CO2
cancel out the hydrocarbon and water molecules from both side of the equations to make it an overall equation
considering option D.
Al4C3 + 9O2+ 12H+ ------>4Al(OH)3 + 3CO2
mol of CO2=108/24000=4.5*10-3
3:1.......mol of Al4C3=1.5*10-3
Mr=144
option D is correct.
thanks a lot
Is this As level or A level?View attachment 63810
Plz someone guide me on how to balance such equations...will be really grateful
AsIs this As level or A level?
Barium carbonate does not decompose on heating using a busen burnerView attachment 63850
When BaCO3 and MgCO3 are heated they would produce their oxides, right?
and If they react with HCL then they wouldn't produce CO2 .. I think 1 is wrong but it isn't .. why?
._.Barium carbonate does not decompose on heating using a busen burner
Ans is C ?View attachment 63810
Plz someone guide me on how to balance such equations...will be really grateful
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