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Chemistry: Post your doubts here!
solubility rules, BaSO4 is insoluble. Hmm.. Which reaction are you basing on when you mention barium sulfate and acid? -
Chemistry: Post your doubts here!
Can you type out the spdf configurations of the mentioned atoms? What values are you using? Chances are you didn't convert dm3 to m3. -
Chemistry: Post your doubts here!
Q16. Barium sulfate is not soluble in the acid, whereas barium carbonates reacts with the acid to form a soluble barium compound. Q26. X represents a halogen atom. W: CH3CH2XCH3 X: CH3CH(OH)CH3X Y: CH3CH2XCH3 Z: CH3CH2CH2OH -
Chemistry: Post your doubts here!
Q12 heat absorbed by 200 g of water = 200 x 4.2 x 48 = 40 320 heat released by 1.6 g of fuel = 40320/45 x100 = 89 600 heat released by 1 g of fuel = 89600/1.6 = 56 000 Q25. Option A can give both aldehyde and acid. -
Chemistry: Post your doubts here!
Thats the wrong answer? Which year is it? -
Chemistry: Post your doubts here!
Correct. Break the molecule and then oxidize the areas you've circled. See how many fragments you get that end up with a ketone group. -
Chemistry: Post your doubts here!
Where will the cleaving of the molecule occur? -
Chemistry: Post your doubts here!
Question is asking for number of fragment molecules containing the ketone group, not number of ketone groups. -
Chemistry: Post your doubts here!
You can try to create the 2 half equations 2HIO + 2H+ + 2e- --> I2 + 2H2O ------ (1) HIO -+ 2H2O -> HIO3 + 4H+ + 4e- ------ (2) Before combining the 2 equations, we need to make both equations have the same number of electrons (2) x 2 + (1) So ratio of I2 to HIO3 is 2: 1 -
Chemistry: Post your doubts here!
Option says carboxyllic acid, not ethanoic acid. -
Chemistry: Post your doubts here!
The NH3 molecule is the same before and after the reaction, so we would not expect any change in its oxidation state. Ag+ + 2NH3 --> [Ag(NH3)2]+ If you do intend to calculate each atoms, you have to be careful. +1 + 2x + 6 = +1 ( you had -2x instead of +2x) -
Chemistry: Post your doubts here!
total moles = 1- x + 1 -x + x + x = 2 moles -
Chemistry: Post your doubts here!
Leaving mathematical calculations aside, we can reason it out in this manner. A <-> B exothermic can also be represented by A <-> B + heat A <-> B endothermic can also be represented by A + heat <-> B Changing the temperature (removing or adding heat) will shift the equilibriums... -
Chemistry: Post your doubts here!
You are referring to the line mole of H2 formed = 33.3/100 *2 ? The 2 is the total moles of gases, moles of H2 = % of H2 x total moles -
Chemistry: Post your doubts here!
You can post the answer scheme here for checking. This question is familiar, I believe it was answered before. -
chemistry doubt
K2O + H2O --> 2KOH ------- (1) 2KOH + H2SO4 --> K2SO4 + 2H2O ----(2) moles of H2SO4 used in (2) = conc x vol = 2 x 0.015 = 0.03 mol moles of KOH used in (2) = 0.03 x 2 = 0.06 mol Taking into account the dilution factor, moles of KOH in 250 cm3 = 0.06 x 10 = 0.6 mol moles of K2O = 0.6/2...- Metanoia
- Post #2
- Forum: Help, Ideas & Suggestions
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Chemistry: Post your doubts here!
With such questions, the neatest approach would be to use the tables to keep track of the quantities of reactants and products. -
Chemistry: Post your doubts here!
Look at the molecules, which one of them is optically active (have a chiral carbon)? Look at the groups connected to the double bonds, which of them is showing the trans isomerism? -
Chemistry: Post your doubts here!
The carbon (in the alkane) that had its H replaced by Br is oxidized.