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Recent content by williamcwz

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Chemistry: Post your doubts here!

An element X and compound YZ react separately with acid as shown. X(s) + 2H+(aq) → X2+(aq) + H2(g) YZ(s) + 2H+(aq) → Y2+(aq) + H2Z(g) When 1.0 g of either X or YZ is reacted with an excess of acid, the total volume of gas formed is reacted with an excess of acid, the total volume of gas formed...
- williamcwz
- Post #7,161
- Mar 17, 2014
- Forum: A-Levels
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Physics: Post your doubts here!

Physics paper1 October November 2003 no.31 pls
- williamcwz
- Post #6,820
- Mar 17, 2014
- Forum: A-Levels
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Chemistry: Post your doubts here!

The cracking of a single hydrocarbon molecule, CnH2n+2, produces two hydrocarbon molecules only. Each hydrocarbon product contains the same number of carbon atoms in one molecule. Each hydrocarbon product has non-cyclic structural isomers. What is the value of n? A 4 B 6 C 8 D 9
- williamcwz
- Post #7,160
- Mar 17, 2014
- Forum: A-Levels
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Chemistry: Post your doubts here!

During the bromination of methane, the free radical •3 CH is generated and a possible terminating step of this reaction is the formation of C2H6 by the combination of two free radicals. What could be produced in a terminating step during the bromination of propane? CH3 1 CH3CH2CH2CHCH3 CH3 CH3...
- williamcwz
- Post #6,955
- Jan 18, 2014
- Forum: A-Levels

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