₦airaland Forum

hatux:
@ Chimhigher' nice post there.. But I have a problem here, not me though... I have a brother who is a commercial student but already graduated from senior secondary school but wants to further to the university to study computer science which its a science course, but he was told to apply for neco and add both physics and chemistry to the subjects he's gonna seat for... Now, the question I wanna ask is, can he pass those subjects 'physics and chemistry? If truly he reads textbooks of both subjects.. Waiting for your reply and thanking you in advance..

benromeo39:
it is impossible. He has to go for tutorials,even if it's just for 6 weeks.

hatux:
Why is it impossible ma'am?

beatsbyj2g:
it is not impossible we are just saying doing it on his own might take 3yrs to understand fully. He can make it faster with d use of a catalist (I.e tutorial classes)

beatsbyj2g:
Nice thread for those dat love chemistry
FYI: ALL D FOLLOWING DEFINITION ARE PLAIN AND EASY TO GET DEFINITION AND SHOULD NOT BE USED IN FORMAL EXAMS LIKE WAEC.

Let's start with
HOMOLOGOUS SERIES; an homologous series is a family of organic chemistry in which all d successive members differ from d other by -Ch2
For example d alkane family
Methane Ch4
Ethane C2h6
Propane. C3h8
Butane. C4h10
From d above we've seen dat every new member in d family is different from d one b4 it. By Ch2

Classwork; write d structural formula of pentane, hexane, heptane, .............,dectane .

Other families are alkene, alkyne etc.

This is a joke right?

Nnewi1stSon:
This is a joke right?

hatux:
Okay boss, what you mean now is that without tutorial classes, he won't be able to comprehend fully?

beatsbyj2g:
correct. Becoz if he is planning on writing jamb he needs to be fast and furious

Dominionng:
Nice one..

I'd tell you a chemistry joke though, but all the good ones Argon.

hatux:
He actually wants to write jamb, and this dude am talking bout want to study computer science, how's he gonna cope?

hatux:
Why is it impossible ma'am?

SMALLPENIS:
Geofavor , I think I know you
are you favour omotoso ?

ikeola6:
Are u a chemistry student?

JayEye:
And you con fall your hand

That awkward moment ...

Brinebryne:
The structure is called "protoporphyrin IX",a specific porphyrin in heme B(with Fe atom being in the middle) which is a group of hemoglobin. It is created in the metabolism of porphyrin by the enzyme protoporphyrinogen oxidase.
porphyrin/porphyrin ring itself is a type of pigment found in living things such as chlorophylls(when Mg2+ is centrally attached to it) that makes plants green & hemoglobin(when Fe2+ is centrally attached to it) which makes red blood. when all the substituents groups such as the propionate ion,vinyl group & methyl are removed,the resulting structure is called porphine,the simplest porphyrin. There are 4 rings which re interconnected,and each ring is called pyrrole ring,nd when connected,it is porphine.
let me stop here.

beatsbyj2g:
he needs to
1. Cover jamb syllabus once every 2 month till Feb
2. Study past questions jamb &waec
3. stop visiting nairaland till he's exams are over.

With dis he can even get 250 in jamb

benromeo39:
because they are subjects he can't understand alone without proper guidance. He needs tutorials.

thinezy:
yea chemistry education tho

ikeola6:
Which school??
I'm studying Chemistry too, 200L

thinezy:
Unizik finals

thinezy:
Wooooooooooow
wat are yhu??

SMALLPENIS:
Teacher SP in the house. chimhigher , sorry for not showing yesterday, was pretty busy.
my first class, so excited
Octane Rating
Octane Rating is the standard measure of the performance of a petrol in an internal combustion engine.
Fuels with higher octane ratings are used in high performance petrol engines, while poor quality fuels would explode prematurely causing knocking if used in a high performance engine.
Knocking
In a normal spark-ignition engine, the air-fuel mixture is heated due to being compressed and is then triggered to burn slowly by the spark plug and ignition system. If it is heated and/or compressed too much, then it will explode
when triggered (detonate), or even self-ignite before the ignition system sparks. This causes much higher pressures than
engine components are designed for and can cause a "knocking" sound. Knocking can cause major engine damage if severe.
Today, we have knock sensors to check if a fuel being used would cause knocking.

---

The octane number of a fuel is the percentage of iso octanes mixed with heptanes which has the same knocking/pinging characteristics as the fuel when comparisons are made in a standard engine.
The octane number/rating of a fuel can be increased by the presence of branched chain hydrocarbons and aromatic compounds.
Ethanol and Methanol when added to some petrols improve their performance.
TO BE CONTINUED...BATTERY LOW