₦airaland Forum

dolapo74:
The Head of State in his New Year Broadcast to the nation emphasized the need for Nigerians to regard ..........as members of the family
A themselves
B one another
C each other
D yourselves
E themselves

B

This is the first question

Dry steam at 100°C is bubbled into 500g of water originally at 20°C. What will be the temperature of the water after 30g of steam has condensed? Specific latent heat of steam is 2.26*10^6J/k, specific heat capacity of water is 4200J/Kg/k


And this is the second question

Calculate the total energy required to evaporate completely 1kg of ice that is initially at -10°C.
Specific heat capacity of ice is 2.2x10^3J/Kg/K
Specific heat capacity of water is 4.18x10^3J/kg/k
Specific latent heat of ice is 3.34x10^5J/kg
Specific latent heat of vaporization of water is 2.26x10^6J/kg..

pls

Damayogenius18:
...which question is dat( Eben got it,want him to solve it)....av added u to d reading group.

you haven't added me

Gracy3535:
If i catch u eh

lol

Damayogenius18:
..wrong but u tried....there is a small mistake along ur calculation....
Bro,are u interested in the reading group?

sure
zero nine zero 34 six zero 93 seven four.
correction pls

Damayogenius18:
A 600ml of water was added to 200ml of a 1.6M CaCl2 solution...what is the concentration of chloride in the new solution....(A) 0.4 (B) 0.8 (C) 1.2 (D) 5.6
PS....if u r in Ibadan,it will be of good help,if you can go to Team tutor...u will be expose to a lot of question like this....

I'll go for 0.4M.
just WURUWURU TO THE ANSWER

Samsonyte:
jst lyk everyone have said go for the course u ave passion for, u knw the future u can't picture u can't feature in it, why dont u start to imagine the kind of lyf want to live in future becos urimagination>determination>desperation>success, everything still revolve around passion becos if u dnt imagine it, u can never have passion for it.

am grateful boss.
thanks sir.

Eben331:
I understand u. You hav to study a course u av passion in and desire for, and nt because u are desperate for admission or because d course is lucrative. You just dont hav to give up on ur dream course. Besides, u av to make changes on those areas u made mistake last yr and pray to God.

thanks bro

Eben331:
(1) Which of the following scientist studied the chemical behaviour of gases A Boyle B Gay Lussac C Graham D Dalton E Charles (2) The bond between two iodine molecules is A Co-ordinate bond B Electrovalent bond C Ionic bond D van der waal's forces E hydrogen bond (3) If force is applied to an electrovalent crystal. A the shape will be deformed B the shape will not be deformed C the crystal will not be fractured D the shape and the crystal structure will be deformed E none (4) Water exists as a solid, liquid and gas respectively because A water is colourless B water is electrovalent C water in any state possesses a certain degree of motion in the molecules D water is molecular E none (5) The pressure exerted by a gas is a result of A the continuous random motion of its particles B bombardment of the walls of the container by its molecules C the expansion of the gas molecules D the elastic nature of the gas molecules E the collison between the gas molecules. EXPLANATIONS WILL BE NEEDED.

1-B(2)C(3)A(4)C(5)B
that 5 may be E.
am not even sure of any self

Eben331:
Just as everyone has said, just follow ur heart and study the course u desire.

may be am being scared of not getting admitted, cause I was devastated last year,and tired of staying at home again,that's y am surfing the best course that can gimme admission.

yusman14:
no course is bad.just follow ur passion..not all doctors ar rich and successful...hope for d best...

Thanks to everyone.
I'll go for agricultural economics

Pes13:
I know people would have advised you to opt for other option.

Physiology, biochemistry, nutrition and dietetic, public health are wonderful options you can explore.

oga Pes13
pls which course would you recommend for an Average student(65%)to study? my preference are
Medical laboratory science
Dentistry
Agricultural economics.
I scored 30* in jamb,and am very good in Biology,good in chemistry, and fair in physics.
I like health related course,but one that can put food on one's table in Nigeria's economy.
but I learnt UI has increased its tuition fee of medical students, which is giving me second thought of medical school (college of medicine as a whole)
that's why I chosed Agric economics.but I want to change to any of the above.
advice also needed from oda bosses and readers,I really need advice before i go for change of course on Monday.
damayogenius18
Eben331
yusman14
hardebaryor
dannyboii1
samsonyte
& others

Eben331:
Boss ke. I am your boy o. From V2=V1(1+gamma*change in tita) V2/V1=1+gamma*change in tita---eqn (i) Know dat volume is inversely proportional to density, we can say dat d=M/V where M is mass which is a constant. M=dV d1V1=d2V2 V2/V1=d1/d2 Substitute for eqn(i): 1+gamma*change in tita=d1/d2 d1=d2(1+gamma*change in tita) You can use d1 to rep density of mercury at 0degree celsius and d2 to rep density of mercury at 100 degrees celsius and at 22 degrees celsius. SOLUTION: By making d2 the subject of formula: d2=d1/1+gamma+change in tita d2 at 100^oC=1.36*10^2/1+180*10^-6*100=136/1.018=1.33*10^2kg/m3 d2 at 22^oC=1.36*10^2/1+180*10^-6*22=136/1.00396=1.35*10^2kg/m3.

thanks boss

Eben331:
(3) density of mercury at 100 degrees celsius=1.33*10^2kgm^3 and density of mercury at 22 degrees celsius=1.35*10^2kgm^3

boss could you make this explicit cause the answer I got is quite different regarding the powers of the answer,am getting mine in powers of four,
for 22°c I got 1.36"10^4…

and at 100°c 1.38*10^4

okk4sure:
Wt ur explanation,i agreed wt d responder dt "u are unserious & below average" so to say.U forgt wht...?

fool
chai!!!

DrBESTJC:
CHEMISTRY.

1) Which of the following is the relative molecular mass of a compound which has empirical formula CH2O? ..........
(A) 42
(B) 45
(C) 126
(D) 145
(E) 180

2) Which of the following terms indicates the number of bonds that can be formed by an atom?
(A) Oxidation number
(B) Valence
(C) Atomic number
(D) Electronegativity


Explanations will be highly appreciated!

1-E
2-B

oxidation number varies with each compound like in CO and in CO2(ii& iv respectively)
but valence is the number of electrons in the outermost shell of an element available for bonding

Gracy3535:
please what about this : olu brought his clothes and those of his ______ (a)senior brothers' (b)elder brothers (c)elder brother's (d) senior brother

I'll pick B
cause C means elder brother IS
B is like my elder brothers are crazy(many)
and C is like my elder brother's crazy (is crazy)

A

.