Recent content by Vavi Ask

Homework Statement In the laboratory how is MnSO4 oxidised to MnO4- in an acidic medium? a. NO3- b. O2 c. Cr2O72- d. S2O82- (NB: If I've posted this question in a wrong thread please tell me exactly the right place to post it rather than just deleting it and saying to post it in the right...

Homework Statement The number of solutions of the equation sin2x –2cosx + 4sinx = 4 in the interval [0, 5π] is what? Homework Equations sin2x=2sinxcosx The Attempt at a Solution sin2x-2cosx+4sinx=4 ⇒2sinxcosx-2cosx+4sinx=4 ⇒sinxcosx-cosx+2sinx=2 ⇒cosx (sinx-1)=2-2sinx ⇒cosx (sinx-1)=2...

Thank you so much sir!

Someone please help me. Please check whether I'm right. It's important. I usually get immediate replies. Why not today?

Homework Statement 6g of non-volatile solute dissolved in 500g of water freezes at 272.64K. What is the molar mass of the solute? Data given- Tsolution = 272.64K Kf = 1.8 wsolute = 6g wsolvent = 500g 2. Homework Equations ∆Tf = T0 -Tsolution ∆Tf = Kf × molality (m) The Attempt at a Solution...

Sorry sir, I don't know how to explain further. I'm not able to insert the picture of what I've drawn, otherwise I could've shown you at what conclusion I've arrived at. Please sir, it's urgent and important. I shall compare your answer with what I've understood or got and learn it.

They're all wrong, coz I was only able to draw chains and not branches. But still, I believe they have resonance structures. But option 3, I'm not able to do anything.

I believe it's option 3 because that's the only compound I'm not able to draw resonance structures for. But I still have doubt with the others. Can you please help me?

Among the following species, which one does not exhibit resonance? 1. CH2=CH-CΘH2 (the 3rd carbon has a -ve charge) 2. CH2=CHCl 3. 1,4-Cyclohexadiene 4. CH3-NO2 Please, can anyone tell me which one and how did you get it?

Oh sorry sir. I felt like a confusion in your OK. Well, thanks a lot sir.

Oh sorry sir. I felt an air of confusion in your OK that's why. Thanks a lot sir.

Thanks a lot sir.

Sir, are there more chances for it to be right?? An OK is not enough sir...:biggrin::smile:

Homework Statement Given- Mass of particle=m Radius of the circular path=r Magnitude of linear momentum= p Find the radial force acting on the particle. Homework Equations p=mv acentripetal=v2/r The Attempt at a Solution Fradial=macentripetal =mv2/r =mv2×m/r×m...

But there is a problem. Can we answer this question in other words where this work energy theorem is not used?