i dont get why we use excess air when converting SO2 to SO3 in the contact process......i know it shifts the equilibirium shifts to the right but i dont get why...??????![]()
According to the Le Chateilier's (dunno how to spell it
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i dont get why we use excess air when converting SO2 to SO3 in the contact process......i know it shifts the equilibirium shifts to the right but i dont get why...??????![]()
Aoa,http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w08_qp_1.pdf
Can anyone explain 1,4,22,30 and 39 from this paper plz ??
Oh yes, a little mistake by me, check i corrected the first part!But the mark scheme of this paper( O/N 03) says the answer is B...![]()
Thankk youAoa,
Q1:
Mr (TiO2) = 47.9 + 16 + 16 = 79.9
Mr (FeTiO2) = 55.8 + 47.9 + 3(16) = 151.7
FeTiO3 ---> TiO2 + FeO
molar ratio b/w FeTiO3 and TiO2 is 1:1
so
151.7 g of ore gives 79.9 g of TiO2
1 g of ore gives (79.9 / 151.7 g) of TiO2
19 tonnes of ore will give
= 19 * (79.9 / 151.7 g)
= 10 tonnes
So, A is the answer!
Q4:
The hydrogencarbonate anion is (HCO3)-1
Total electrons = 1 of H + 6 of C + 3(8) of O + 1 extra electron due to -1 charge
= 1 + 6 + 24 + 1
= 32
So, C is the answer!
Q22:
B and C have two similar groups (methyl) attached to one side of carbon having double bond, that means there cannot be cis-trans isomers for these
A will form cis-trans isomers if 1 H is substituted on the R.H.S but it will not have a chiral centre
D already has cis-trans isomers, and it will have a chiral centre at the RED carbo atom if one of the BLUE hydrogen is replaced by halogen!
CH3CH=CHCH2CH3
So, D is correct!
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Anyone Plz ?????AsSalamalikum wr wb, i have some question from w11 qp 11 Please help, May Allah(swt) help you and make your way easy for Distinctions Ameen.
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_qp_11.pdf
Q4
Q6
Q2
Q1
Q8 why ? HSO3- is donating H means proton donor means acid
Q10
Q14
Q15
Q18
Q16
Q20
Q3
Q9
Q22
Q23
Anyone Plz ?????
Q30:http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w08_qp_1.pdf
Can anyone explain 1,4,22,30 and 39 from this paper plz ??
Aoa wr wb,please someone explain me these questions Q:2,22,27
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