you're literally the best! i got 8,7,6 in my science assessments because of you 😊

sir... I just came back to thank you for everything! I just got my GCSE triple science results back and I just want to thank you so much for getting me to all 9s in sciences. I very much appreciate you sir

@adoontiallen986

2 жыл бұрын

Wow congratulations

@shaheer_04

Жыл бұрын

lmao @ this comment contrasting with that saul goodman pic

Love the video just got full marks thanks to you on my physics paper

Thanks, I love your videos shaun.

You are a blessing thankyou so much for taking time to teach this in a non complicated way

Thank you doctor

so helpful! thank you

You are the reason im going to pass my exams

your literally the reason im gonna pass my gcses

Sir I just wanted to ask why dont we use the first or last carbon chain why is it always the middle ones?

This man is the goat

Thank you for this video it is really helpful! I was just wondering, for the example of the chain isomers, is methyl propane also a functional isomer of butane as they have a different functional group (or because butane is an alkane does that not matter)?

thank you freesciencelessons for the free science lessons :D

thanks my g :)

can you please cover halogenoalkanes? your videos are really helpful. Thank you so much!!

C5H12 (pentane) also has an isomer 2,2 dimethyl propane which wasn't discussed in the video

@Freesciencelessons

6 ай бұрын

I discuss dimethylpropane in the video. The numbers are not needed as it can only be 2,2-dimethylpropane. However, it is not wrong to use the numbers, they just are not required.

Will you start uploading A level Physics video?

what's the difference between a functional group isomer and a position isomer? Because aren't they both involving the moment of the functional group

@Freesciencelessons

2 жыл бұрын

Functional group isomers have the same atoms but different functional groups, for example carboxylic acids and esters. Positional isomers simply have the same functional group at different positions on the carbon chain.

@hanabanana9106

2 жыл бұрын

@@Freesciencelessons ohhhh okie thank you!!

you make cadivasculor beat more time per second

Will we lose marks if we call methylbutane 2-methylbutane etc?

@Freesciencelessons

2 жыл бұрын

No you wouldn't lose marks as it's not wrong. It's just that the 2 isn't really needed since the methyl group can only be on carbon 2 in methylpropane.

@AnonymousReader-er4eg

Жыл бұрын

ur profile name tho..

@thisath_renuja

Жыл бұрын

@@AnonymousReader-er4eg 🤣

Wait forgive me if I sound dumb rn but why can’t the placements for the double bonds be on 3,4 or 5 in Pentene as a structural isomer at 2:54 ? I’m just asking because it’s very specific.

@Freesciencelessons

6 ай бұрын

You always count so that the numbers are as low as possible. Pent-3-ene would be pent-2-ene. Pent-4-ene would be pent-1-ene. Pent-5-ene cannot exist as the number indicates the carbon atom at the start of the double bond so there would have to be a carbon-6 and that would be hexene.

@Random-sd8ef

6 ай бұрын

@@Freesciencelessons ahh that makes so much more sense. Thank you! 🙏

....this is the work i have to learn for my iGCSE Chemistry😭

Hi. Aren’t 3-methylbut-1-ene and 2-methylbut-1-ene the same thing (3:12). If not why is there not a 3-methylbut-2-ene and only a 2-methylbut-2-ene?

@Freesciencelessons

Жыл бұрын

3-methylbut-1-ene and 2-methylbut-1-ene are different because but-1-ene is not a symmetrical molecule. But-2-ene is a symmetrical molecule so 3-methylbut-2-ene and 2-methylbut-2-ene are the same.

Do you know a good way to revise physics?

Why are there 12 hydrogens in 2-methylbutane but not 13.. Thank you very much

@Freesciencelessons

2 жыл бұрын

2-methylbutane is a structural isomer of pentane (C5H12). This means that it has to have the same number of carbon atoms and hydrogen atoms as pentane.

what examboard is this?

@Nightmare-yw3ku

Жыл бұрын

Edexcel, OCR and AQA

thankyou sir!!!!!!!!!!!!1

I have a question. How come you did have to show placement of the methyl side chain group in 1-chloromethylpropane and 2-chloromethylpropane? The methyl group is on carbon 2, I thought you always had to show where the side groups are?

@Freesciencelessons

2 жыл бұрын

In methylpropane, the methyl group can only be on carbon 2. That's because propane only has three carbon atoms. If the methyl group was on carbon 1 or 3 then that would simply be butane not methylpropane. You can call methylpropane 2-methylpropane if you want to but you don't need to.

Sir, is 2,2-dimethylprop-1-ene not an isomer of pent-1-ene

@Freesciencelessons

Жыл бұрын

2,2-dimethylprop-1-ene cannot exist. If carbon 2 has two methyl groups, then carbon 2 has four single bonds, so the molecule cannot also be an alkene.

@bharadwajeddanapudi8507

Жыл бұрын

@@Freesciencelessons oh yeah, my bad sir.

Can you please do Hess’s cycle

@Freesciencelessons

2 жыл бұрын

Hi. I've already covered Hess's Cycles. They're in the A level Chemistry playlist on Enthalpy. They're called Enthalpy Cycles.

@4:19 ,,, sorry but isnt this supposed to be 1 chloro 2 methyl propane

@Freesciencelessons

6 ай бұрын

Propane only has three carbon atoms. The methyl group has to be on carbon 2 (if it was on carbon 1 or 3, then the molecule would be butane). So the "2" is not necessary. However, it is not wrong, it is just not needed. You would not lose a mark in the exam if you use the "2".

Ur a legend

I have these in my gcses 😭

Hi Sir, I think you have made a mistake in the a level atom economy video. The answer should be 79.8% not 78.8%.

going into a level next year and have no idea what ur talking about lol

Hi

L bozo