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Q9 - find da mols of each compound usn mols= mass/molar massQ-6, 8, 9, 10, 18, 25, 35
http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_s10_qp_11.pdf
http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_s10_ms_11.pdf
i believe its the 3rd time i'm posting :/
nd ues ths mols to find the vol... usng mols=vol/molar vol (molar vol=24dm)
A- mr of O2= 32
3.2/32= 0.1 mols
since mols=vol/molar vol
vol= mols*molar vol
0.1*24=2.4dm
B- mr of N2 = 28
5.6/28=0.2 mols
vol= 0.2*24= 4.8 dm
C- mr of SO2= 64
8/64= 0.125 mols
vol= 0.125*24= 3dm (the ans)
D- mr of CO2=44
11/44=0.25 mols
vol= 0.25*24=6 dm
Q10..student P says X is a strong acid..bt the pH given is 6, whch is almost neutral so student P is wrong..so da nly option without P is D which is d aans!!!
Q25- when an ester is hydrolysed it will gve its respective carboxlyic acid n alcohol..in ths cse C3H7OH wil b da alcohol n C2H4O2 will b da acid.. since da acid is nt gven as an option, B is da ans..
hpe i mde sumthn clear????