Let questns rush in plss,Y da boredom?

emmyeuler1: what is the general formula for grignards reagent?

R-Mg-X
Where R is for d Akyl group, Mg for magnesium nd X for d Halogens

larri: 1. Which of this is a materials for d smelting of iron ore in a blast furnace A.CaCO3 B.Zn(NO3)2 C.CuSO4 D.AlCl3 E. CaSo4
2.Which of this silver halide salt is readily soluble in ammonium hydroxide A.AgI B. AgBr C.AgCl D. AgF.
3. Chlorine,bromide and iodine resemble each other in that all A.dissovle in alkalis B. React violently with hydrogen without heating C.displace each other from solutions of their salts D.are gases E.are liquids.

1) A
2) C
3) C

emmyeuler1: WHERE U ABLE TO CONFIRM THE FORMULA 4 ENERGY DENSITY BY BROWSING?...I WILL BE EXPECTING UR FEED-BACK

ENERGY DENSITY=ENERGY/AREA
ITS UNIT IS J/M^2

buzyguy: Ca3(po4)2 is a sparingly soluble salt in water.the molar solubility of the salt in termz of itz solubility product,ksp,is given by: a.[ksp/108]^1/3 b.[ksp/108]^1/5 c.[ksp/36]^1/3 d.[ksp/36]^1/5

KSP=[3X]^3[2X]^2....KSP=108X^5....SOLUBILITY=[KSP/108]^1/5....ANS(B)

buzyguy: 20cm3 of co are mixed and sparked with 200cm3 of air containing 21% of o2.what is the total volume of the resulting gases if all volumez are measured at s.t.p? A.179cm3 b.200cm3 c.210cm3 d.220cm3

Sparking ratio is 2:1 for CO AND O2....VOLUME OF RESULTING GAS=210cm3....ans is C

buzyguy: (1)What happenz to the conductivity of an electrolyte as itz concentration reducez? It,a.decreasez b.is unaffected c.decreases d.reduces to zero (2)what happenz to da molar conductivity if da concentratn z reducez by a factor 4. It, A.increasez by 2 b.increasez by 4 c. Decreasez by 2 c.decreasez by 4

ANSWER TO QUE 2...molar conductivity is inversely proportional to concentration...Hence,molar conductivity will increase by 4...ans is (B)

emmyeuler1: Sparking ratio is 2:1 for CO AND O2....VOLUME OF RESULTING GAS=210cm3....ans is C

2c0+02=2c02
21% of 200=42cm3(vol of oxygen)
2:1:
20:42,1f d vol of c0 z 20,vol of o2=10
therefore total volume of d resultin gas=vol of 02 left(42-10)+vol of co2(20)+vol of gas left(200-42)=32+20+158=210cm3
AM BACK,PURE JAMB QUE PLS..
@Buzyguy n emmyeuler u b my oga at d top...ready 2 learn 4rm

for more on chem n phy6 try n get lamlad n solve wit d little tym left...stil ur boy joseboy...
joseboy199o @2go

for more on chem n phy6 try n get lamlad n solve wit d little tym left...stil ur boy joseboy...
joseboy199 @2go

A bullet fired vertically upward from a gun held 2.0m above the ground reaches its maximum height in 4.0s.calculate its initial velocity
2the phenomenon that shows that increase in pressure lowers d melting point can be observed in
3in homes,elecrical appliances n lamps are connected in parallel because
4)the electrical properties of germanium can be altered dratistically by d addition of impurities.these process is referred to as..
5)under wic conditions do gases conduct electricity

1-s=ut + 1/2at^2,v z equal to zero.a=g,wich z equal to -10m/s2 as itz upward movement,then substitutn givz 20.5m/s2

joseboy199: A bullet fired vertically upward from a gun held 2.0m above the ground reaches its maximum height in 4.0s.calculate its initial velocity
2the phenomenon that shows that increase in pressure lowers d melting point can be observed in
3in homes,elecrical appliances n lamps are connected in parallel because
4)the electrical properties of germanium can be altered dratistically by d addition of impurities.these process is referred to as..
5)under wic conditions do gases conduct electricity

Under the influence of an octahedral ligand field th d orbital splits into two groups ..........and ........?

[quote author=joseboy199]A bullet fired vertically upward from a gun held 2.0m above the ground reaches its maximum height in 4.0s.calculate its initial velocity
2the phews that increase in pressure lowers d melting point can be observed in
3in homes,el appln lamps are connected in parallel because
4)the electrical properties of germanium can be altered dratistically by d addition of impurities.these process is referred to as..5.under what QUE.4...DOPING.......QUE.5..HIGH VOLTAGE AND LOW PRESSURE

OUTLINE TWO WAYS IN WHICH CARBONIUM ION GENERATED ON A SUBSTRATE CAN BE STABILIZED?

DEDUCE THE THE BOND ORDER OF A Cl2 molecule

EXPLAIN WHY CO2 IS A GAS AT ROOM TEMPERATURE WHILE SIO2 IS A HIGH MELTING SOLID?

AS U GO DOWN GROUP(IV).....THE STABILITY OF +IV OXIDATION STATE DECREASES WHILE +II OXIDATION STATE INCREASES....THIS PHENOMENOM IS KNOWN AS...........

Calculate the crystal field stabilization energy for a d^8 ion such as Ni2+ in octahedral complexes

2-regelatn,3-parallel connectns giv room for the same amount of voltage to pass through each applianc in wich da switchn-off of a applianc doez nt affect da otherz.in additn parallel connectn eliminates heatn of electric wires by the current,I^2Rt

joseboy199: A bullet fired vertically upward from a gun held 2.0m above the ground reaches its maximum height in 4.0s.calculate its initial velocity
2the phenomenon that shows that increase in pressure lowers d melting point can be observed in
3in homes,elecrical appliances n lamps are connected in parallel because
4)the electrical properties of germanium can be altered dratistically by d addition of impurities.these process is referred to as..
5)under wic conditions do gases conduct electricity

odaz hav bn answered by prof. Emmer.

U r on da way,bt itz inversely proportnal to square root of itz concentratn.dat meanz it wld increaz by factor 2,u really tried bro.

emmyeuler1: ANSWER TO QUE 2...molar conductivity is inversely proportional to concentration...Hence,molar conductivity will increase by 4...ans is (B)

Whch of d ffg is sex-linked xter? A. Sickle cell anaemia b. Tongue rolling c. Skin colour d. Colour blindnex.

Vry correct!

emmyeuler1: KSP=[3X]^3[2X]^2....KSP=108X^5....SOLUBILITY=[KSP/108]^1/5....ANS(B)

klem93: Whch of d ffg is sex-linked xter? A. Sickle cell anaemia b. Tongue rolling c. Skin colour d. Colour blindnex.

THIS THREAD IS MEANT 4 JAMB CHEMISTRY AND PHYSICS NOT BIOLOGY....THOUGH THE ANSWER IS C.... COLOUR BLINDNESS ARE SEX LINKED

Pls let questnz rush in.

Emmer@,ur questnz r 2tough 4me oo. I dnt tnk i cn tackle them as xpectd unlez i consult sum oda txts,bt da tym z already gone 4dat cuz da xam z already brngn out itz aroma showing itz nearer dan b4.mayb afta jamb then we button on our search lightz nd brng diverse questnz,i pray nd prophesize dat evry1 of us here would emerge vry far abov 300,evn one of the top scorerz in jesus' name

buzyguy: Emmer@,ur questnz r 2tough 4me oo. I dnt tnk i cn tackle them as xpectd unlez i consult sum oda txts,bt da tym z already gone 4dat cuz da xam z already brngn out itz aroma showing itz nearer dan b4.mayb afta jamb then we button on our search lightz nd brng diverse questnz,i pray nd prophesize dat evry1 of us here would emerge vry far abov 300,evn one of the top scorerz in jesus' name

I SAY A BIG AMEN TO THAT

I dnt tnk sickle cell z sex-linked

emmyeuler1: THIS THREAD IS MEANT 4 JAMB CHEMISTRY AND PHYSICS NOT BIOLOGY....THOUGH THE ANSWER IS A AND C....SICKLE CELL AND COLOUR BLINDNESS ARE SEX LINKED

Jesus!If jmb sets ds questn i wld prefer to tear my ansa buklet.

emmyeuler1: Calculate the crystal field stabilization energy for a d^8 ion such as Ni2+ in octahedral complexes

Let questnz troop in plsss!

buzyguy: Ok,chemstry:the product of reactn btwn excez ethanol nd conc.H2SO4 at 145degcelsiuz is,a.ethene b.ethanoic acid c. diethysulphate d.ethoxyethane

ethanol undergoes a dehydration reaction with H2SO4..at 180 degree c,ethene is formed and at 145 degree c at excess ethanol,ethoxyethane will be formed...so from my own point of view,i think the ans should be D
it's been a while away from thread