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Chemistry paper 1 mess up in riyadh center
I called up the UK office and apparently they don't deal with candidates. :( Nonetheless, they said we should definitely talk to the officers at the examination centers we went to and if they think we've been hard done-by they'll definitely take action. He kept reassuring me that they will take... -
Chemistry paper 1 mess up in riyadh center
I'm calling up the regional office and submitting a complaint to the CIE. -
Chemistry: Post your doubts here!
try drawing all the structures in the question. you'll know exactly what I'm talking about. -
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Chemistry: Post your doubts here!
This will takes quite some playing around and calculating to do this question. I doubt I'll be able to explain this here or that you'll be able to understand it by mere words. It's best if you skip this question (because you could use your time on more important questions). Don't worry there's... -
Chemistry: Post your doubts here!
3 - the largest angle would be y because y is the angle between atoms which have no lone pairs and are thus tetrahedrally arranged (109.5 angle). So answer is B. 28 - look closely at all the options. in the first one, Br would be substituted by CN followed by it's hydrolysis to acid. in the... -
Chemistry: Post your doubts here!
Yeah there is. You didn't give the states of the compounds in the first equation. So this is the Hess Cycle: [EDIT: The post messed up the Hess Cycle :/ ) So +38 - 214 = -176 kJ. But we're asked the enthalpy change of formation of iodotetrachloride. In the reaction pathway we chose, 2 moles... -
Chemistry: Post your doubts here!
Moles of CO2 ---> 35.2/44 = 0.8 Moles of H2O ---> 14.4/18 = 0.8 So if 0.2 moles of the hydrocarbon will give 0.8 of each of CO2 and H2O, 1 mole of the hydrocarbon will give 4 moles of each of CO2 and H2O. We can not form the equation. CxHy + 6O2 -------> 4CO2 + 4H2O x = 4, y = 8 So the... -
Chemistry: Post your doubts here!
For butan-2-ol, the possible alkenes are but-1-ene cis but-2-ene trans but-2-ene -
Chemistry: Post your doubts here!
You're missing important details of the question here. Please give the link of the original question. -
Chemistry: Post your doubts here!
The answer is A. Try drawing all the possible alkenes that can be formed. Butan-2-ol will form but-1-ene and cis but-2-ene and trans but-2-ene. Propan-1-ol can only form propene. 2-methylbutan-2-ol can not be turned into an alkene as the hydroxy group is attached to a tertiary carbon... -
Chemistry: Post your doubts here!
^Yeah I still have a couple of hours in my exam. Fire away. I'll see what I can do. -
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Is Tafseer not more in portion of Islamiyat?
Yeh kya sawaal hua? :confused: -
domain and range of inverse functions !
The domain of the function is the range of the inverse function. The range of the function is the domain of the inverse function. -
Chemistry: Post your doubts here!
Moles of metallic salt that reacted = (50/1000) * 0.1 = 0.005 Moles of sodium sulphite that reacted = (25/1000) * 0.1 = 0.0025 Therefore, the metallic salt and sodium sulphite react in the ratio (2:1). Moles of electrons produced when 0.0025 moles of the sulphite ions react = 0.005 (mole... -
Chemistry: Post your doubts here!
So we'll just have to agree to disagree. That's fine. -
Chemistry: Post your doubts here!
This will lead us no where. Never has an endorsed chemistry book mentioned carbonic acid nor do we need to know about its chemistry. Like I said, chances of you having carbonic acid in your mouth are slim to none. (the reaction is very slow and you need an enzyme to make CO2 react with H2O)...