Atesunate15: wat is the coordination number in the following complexes
(a) Cu(NH₃)₄⁺²
(b) Al(OH)₄^-1
(c) Co(SCN)₄^-2

i don't really understand you you meant by coordination number!!may be you can step it down

Good @atesunate and ANDREW
you got the physics question correctly...

Atesunate15: wat is the coordination number in the following complexes
(a) Cu(NH₃)₄⁺²
(b) Al(OH)₄^-1
(c) Co(SCN)₄^-2

Did u mean oxidation numbers?

U are right @ andrew and joseboy

Chemical composition of pearl is?

ANDREW2EIC:

Did u mean oxidation numbers?

t.boy007:
i don't really understand you you meant by coordination number!!may be you can step it down

no it is nt oxidation number, to help u a litu bit coordination number (C.N) is the number of ligand donor atoms(hp u knw watr is called ligand) directly bounded to the central atom

wat are negatrons an positron

Jamb all ready in my eyes

Atesunate15: (x²-2)(x²+4) -2x²

Please full working

Atesunate15: (x²-2)(x²+4) -2x²

Please show full working

Atesunate15:

no it is nt oxidation number, to help u a litu bit coordination number (C.N) is the number of ligand donor atoms(hp u knw watr is called ligand) directly bounded to the central atom

In that case, the C.N is 4

ANDREW2EIC:

Please show full working

since the guy sed its wrong buh
since (x²-2)(x²+4)= x⁴+2x-8-------------(i)
and we are looking for x4-8 so we will just subtract 2x from equation (i) it will nw bcom
[x⁴+2x-8]-2x
x⁴+2x-8-2x
2x will cancel demselves nw x⁴+2x-8
so x⁴-8 will be (x²-2)(x²+4)-2x

A compound contains 40% carbon,6.7% hydrogen and 53.3% oxygen.if the molar mass of the compound is 180,find the molecular formula?

joseboy199: A compound contains 40% carbon,6.7% hydrogen and 53.3% oxygen.if the molar mass of the compound is 180,find the molecular formula?

H C O
6.7/1 40/12 53.3/16
6.7 3.33 3.33(approx)
divide by smallest
1 : 2 : 1
molecular formular (CH2O)=180
(12+1*2+16)n=180
30n=180
n=6
molecular formular=C6H12O6

larri:
H C O
6.7/1 40/12 53.3/16
6.7 3.33 3.33(approx)
divide by smallest
1 : 2 : 1
molecular formular (CH2O)=180
(12+1*2+16)n=180
30n=180
n=6
molecular formular=C6H12O6

Daz gr8,,,vewi correct,,,

an example of element that can catanate is...

The collision between molecules of a Gas is perfectly elastic:wotz the implication?

The solutes of a mixture to b separatd moves 3/4 up a chromatoplate 15cm long.what z the chromatographic value if the solvent front moves a distance of 0.8 frm the top of the chromatoplate?

Carbon 2form chainz

joseboy199: an example of element that can catanate is...

Carbon is found in da combined state in wich set of da followingi)wood (ii)coke (iii)coal (iv)natural gas (A)i & ii (B)i & iv (C)ii & iii (D)ii & iv ?

@atesunate, i can c ure giving out complex nd advance chem quesn, dat ar nt even in d jamb syllabus. Back to ur quesn, in my txtbuk if u react chlorine with cold nd dil solutn of sodium hydroxide, den it wil give, NaOCl + NaCl + H2O, nd my txtbuk named it as sodiumoxochlorate(1), nd its nt avin ion also, wat am finking is ur own naming myt b an advance form nd mst of ur chem quesn ar outside of d syllabus nd complex, consider it, jst an opinion sir.

All we need here are jamb oriented questions. That's the only way we can improve ourselves towards jamb and post utme.

Atesunate15: since the guy sed its wrong buh
since (x²-2)(x²+4)= x⁴+2x-8-------------(i)
and we are looking for x4-8 so we will just subtract 2x from equation (i) it will nw bcom
[x⁴+2x-8]-2x
x⁴+2x-8-2x
2x will cancel demselves nw x⁴+2x-8
so x⁴-8 will be (x²-2)(x²+4)-2x

It looks more magical than mathematical, though u tried sha.

Grt pharmcst nd medics in da aoz signify by quoting 'great'

joseboy199: the substance often use for vulcanization of rubber is....a)chlorine b)hydrogen peroxide c)sulphur d)tetraoxosulphate(vi)acid

Sulphur

Attempt this:

A body of mass 4kg resting on a smooth horizontal plane is simultaneously acted upon by two perpendicular forces 6N and 8N. Calculate the acceleration of the motion

Attempt this:

What are the dimensions of electromotive force?

Attempt this:

A motorcycle of mass 100kg moves round in a circle of radius 10m with a velocity of 5m/s. Find the coefficient of friction between the road and the tyres.

N.B: show full working in all the questions.

ANDREW2EIC: Attempt this:

A motorcycle of mass 100kg moves round in a circle of radius 10m with a velocity of 5m/s. Find the coefficient of friction between the road and the tyres.

N.B: show full working in all the questions.

MV2/R
M=100,V=5,R=10
100*5*5/10=250rads (not sure)

Tizzie: MV2/R
M=100,V=5,R=10
100*5*5/10=250rads (not sure)

The coefficient of friction is a ratio of forces, so it doesn't have s.i unit. U failed it, but thanx for being courageous to attempt.

Tizzie: MV2/R
M=100,V=5,R=10
100*5*5/10=250rads (not sure)

Continuation..
250N is aw Fc..therefore coef=F/R,,,whr f is 250N,and r is 100*10=1000N,
coef=250N/1000N
Ans=0.25

ANDREW2EIC: Attempt this:

A body of mass 4kg resting on a smooth horizontal plane is simultaneously acted upon by two perpendicular forces 6N and 8N. Calculate the acceleration of the motion

8N-6N=2N
mass=4KG
F=MA
A=F/M
A=2/4
A=0.5m/s-2