Vincent561's Posts

Nairaland Forum › Vincent561's Profile › Vincent561's Posts

1 2 3 4 5 6 7 8 (of 8 pages)

Education › Re: JAMB Brainstorming forum In Sciences {math,phy, chem,bio} For 2015/2016 by vincent561(m): 2:05pm On Jul 05, 2014

FrancisTony: If 10.5g of lead(II)trioxonitrate is dissolved in 20cm^3 of distilled water at 18^oC, the solubity of the solute in mol dm^-3 is

A) 1.60
B) 5.25
C) 16.00
D) 525.00

[Pb=207, N=14, O=16]

Molar mass of Pb(NO3)2=331g. No of moles dissolved in 20cm3=10.5/331 which is approximately 0.032. So frm here we say 20cm^3 dissolved 0.032moles of d compound @ d given temp,den hw many moles wl dissolve in 1000cm^3/1dm^3. * cross multiply * we have 1.6 i.e option A!

1 Like

Education › Re: JAMB Brainstorming forum In Sciences {math,phy, chem,bio} For 2015/2016 by vincent561(m): 1:21pm On Jul 05, 2014

Professor1234:
1. Shape common to all forms of silicon is?
2. Berryllium oxide is an example of which oxide'
3. The neck of the vagina is the?
4. Which element can be represented with two symbols?
5. Which noble gas is used as fire extinguisher?
6. The percentage of which protein is the highest in the human body?
7. The foramen in which the spinal cord connect to the brain is?
8. The order of reaction can be gotten from?
9. Which element is widely called brimstomes?
10. Amoeba lacks what thus they are shapeless

add the thread creator professor1234 on 2go and on facebook www.facebook.com/adebisi.yusuff

2.amphoteric 3.cervix 5.argon 7.foramen magnum 8. Sulphur

Education › Re: JAMB Brainstorming forum In Sciences {math,phy, chem,bio} For 2015/2016 by vincent561(m): 1:06pm On Jul 05, 2014

FrancisTony: 0.0075 mole of calcium trioxocarbonate(iv) is added to 0.015 mole of a solution of hydrochloric acid. The volume of gas evolved at s.t.p is
A) 224cm³
B) 168cm³
C) 112cm³
D) 100cm³

[molar volume of a gas at s.t.p= 22.4 dm³ ]

Equation of rxn: CaCO3 + 2HCl--->CaCl2 + H2O + CO2. Frm d equation of rxn,we c dat a mole of CaCO3 gave a volume of 22.4dm^3 den 0.0075mole wl giv wat volume?. * cross multiply * nd u wl arrive @ option B. U can stl use d numba of moles of HCL to solve nd stl arrive @ d same ansa!

3 Likes

Education › Re: U. N. N 2014 Pume Updates and thread. by vincent561(m): 12:13am On Jul 02, 2014

ngkessy: please rymzo, I got 214 in jamb will I be lucky enough to obtain medcine if I do well in,my post ume?

can we tlk?

Education › Re: You Think You Are A Genius? Try This by vincent561(m): 9:04pm On Jan 10, 2014

Mr. Eight[quote
author=yinkard4me]In a family four, parents inclusive, d son's name is
twenty eight, daughter's name is thirty eight, and mother's name is
fifty eight. What's d father's name?
WHERE ARE THE NAIRALAND GENIUS?[/quote]

Education › Re: You Think You Are A Genius? Try This by vincent561(m): 9:03pm On Jan 10, 2014

[quote
author=yinkard4me]In a family four, parents inclusive, d son's name is
twenty eight, daughter's name is thirty eight, and mother's name is
fifty eight. What's d father's name?
WHERE ARE THE NAIRALAND GENIUS?[/quote]

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 8:30pm On Jan 09, 2014

Finally,in d ileum,erepsin
converts d polypeptides to amino acid. Maltase converts maltose sugar to
glucose. Sucrase converts sucrose to glucose nd fructose. Lipase converts droplets of fats nd oil to fatty acid nd glycerol
nd Lactase converts lactose 'milk sugar' to glucose nd galactose[quote
author=labodinho]#comes
in to break the silence

Biology

A boy ate a plate of EBA, vegetable stewand beef meat.He drank a cup of
MILK and ate carrot too.What are the enzymes and site of location of
those enzymes that are going to act on this food he ate?[/quote]

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 8:26pm On Jan 09, 2014

amylopsin nd trypsin contained
in d pancreatic juice emptied in d duodenum acting on starch nd
peptone respectively converting 'em to maltose nd polypeptides.[quote
author=labodinho]#comes
in to break the silence

Biology

A boy ate a plate of EBA, vegetable stewand beef meat.He drank a cup of
MILK and ate carrot too.What are the enzymes and site of location of
those enzymes that are going to act on this food he ate?[/quote]

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 8:18pm On Jan 09, 2014

ptyalin in saliva in d mouth produced by d parotid,submaxilliary nd sublingual glands converting d Eba to maltose. Pesin nd renin in d gastric juice produced in d stomach converting d stew nd milk to peptones nd casein respectively.

labodinho: #comes
in to break the silence

Biology

A boy ate a plate of EBA, vegetable stewand beef meat.He drank a cup of
MILK and ate carrot too.What are the enzymes and site of location of
those enzymes that are going to act on this food he ate?

Education › Re: UNIZIK 2014/2015 Admission Guide Thread by vincent561(m): 6:32am On Jan 08, 2014

Am in. Pls do UNIZIK admit students wit awaiting result?

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 6:49pm On Jan 07, 2014*

I beg to disagree wit u on num 2 sir. Rennin which is secreted by d gastric glands in an inactive form prorennin,which is activated by HCl converts caseinogen 'milk protein' into insoluble casein in d presence of calcium ions. @ Op,caseinogen is d soluble form of milk protein while casein is d insoluble form.[quote author=Dr. Laz'Devitan]Answers
1. LIVER(mostly visceral organs of the ABDOMINAL CAVITY)
2)Pepsin makes soluble the curds of CASEIN!
3)Man=32.....Dog=42.....Rabbit=28
4)Sebum
5)what is supporting the testis in the scrotal sac are mainly connective/soft tissues.....It is not necessarily a term ''HOLD'' to be use![/quote]

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 1:43pm On Jan 07, 2014

Influence01: you are right
Caltalytic hydrogenation of benzene produces
A.Oil
B.cyclohexene
C.cyclohexane
D.margarine

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 1:40pm On Jan 07, 2014

Influence01: A chemical reaction in which the hydration energy is greater than the lattice energy is referred to as
A.a spontaneous reaction
B.an endothermic reaction
C.an exothermic reaction
D.a reversible reaction

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 7:44am On Jan 07, 2014

ISLET: a small group of cells that is structurally distinct 4rm d surronding cells.

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 12:55am On Jan 07, 2014

Welcome on board sire

Swagalord18: Folowing

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 12:53am On Jan 07, 2014

Gud bh u didn't mention d numerical make-up[quote author=Dr. Laz'Devitan]Manubrium........the upper section of the pectoral(CHEST) region.....major bones of concern der are
CLAVICLE
COSTAL(RIBS) CARTILAGE....and the
STERNAL bodies in the extra![/quote]

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 12:48am On Jan 07, 2014

What re islets?

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 12:46am On Jan 07, 2014

Ur words re MEDICAL,tho am familiar wit most of d ones u mentioned earlier. So i think u re a MEDIC. Meanwhile,i knw i can go deeper even beta dan u wen i gt 2 ur stage[quote author=Dr. Laz'Devitan]Why do you think am in?

Don't believe you can go deep than me?

Come on!....em lyk yah![/quote] grin

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 12:34am On Jan 07, 2014

Gud

Influence01: condensation polymerization involve d removal of a compound eg Water, ammonia when monomers combine 2gether 2 form a polymer while addition polymerization dere is no elimination of any substance

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 12:27am On Jan 07, 2014

I dnt think so. He's already n d field.

Influence01: are u an aspirant

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 12:25am On Jan 07, 2014

Differentiate btw condensation polymers nd addition polymers

Education › Re: Biology, Chemistry and Physics tutorial thread for jamb by vincent561(m): 12:14am On Jan 07, 2014

Nice one sir,bh i stl dnt think d question was asked in d ryt way.[quote author=Dr. Laz'Devitan]Reptiles are sluggish in design for some above reasons
1)3 chamber heart and blood circulation not as fast as in human.
2)The seem to loss heat quickly to the environment and by the
environment through behavioural adaptation control their heat loss.The
term POIKILOTHERMIC is out of BIOLOGY term....we specially use
ECTOTHERMAL ORGANISMS....U should knw that some reptiles do have
mechanism to control dia internal heat too.If u wake very early in the morning in a white-sunny day,you will observe that some LIZARD are still numb,green in dia bed,eventhough u kicked at dem,they wont wake..not that dey are dead....dey ar not..they ar trying to keep energy to by shutting down most working heat-related mechanism....At the end.......

They come out for BASKING![/quote]