Please attempt this 🤲🤲🤲
It is for your own good
Don't expect cheap questions anymore from Jamb , people that wrote last year can relate better with me
If you really want to score 300+ then is not by mere mouth but by studying hard and studying smartly 😉😉
1) An organic Compound is made up of C, H and O . Combustion of 6.38mg of it gives 9.06mg of CO2 and 5.58m
g of H2O . What is the molecular formula of the organic Compound given that the vapour density is 31 ? [ H= 1 , C =12, O = 16]
A. CH2O
B. CH3O
C. C2H6O
D. C2H6O2
2) Aspirin ( acetylsalicylic acid ) can be prepared by heating salicylic acid , C7H6O3, with acetic acid anhydride , C4H6O3 . The other product is acetic acid , C2H4O2
C7H6O3 + C4H6O3 ---> C9H8O4 + C2H4O2
If the actual yield of aspirin is 1.86g when 2.00g of salicylic acid is heated with 4.00g of acetic anhydride , what is the percentage yield ? [ C4H2O2 = 60, C4H6O3 = 102, C7H6O3 = 138, C9H8O4 = 180 ]
A. 71.3% B. 69.3% C. 70.1% D. 68.1%
3) Which of the following are isoelectronic species ?
A. Ne and Al³+
B. Ca and K+
C. Na+ and Mg
D. All of the above
I wish you success 🧡??
#Young_Prof
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