24-18=6,datz da humus given out in gram,6/24*100=25g.ansa D

Simplefemo: 28g soil sample was heated to a constant weight of 24g. When further heated to red hot and cooled, it weighed 18g. What is the percentage of humus in the soil?
A. 22.2
B. 55.6
C. 75.0
D. 25.0
E. 35.7

2. Normally the flow of blood is never from
a. Artery to arterioles
b. Arterioles to capillaries
c. Capillaries to venules
d. Arterioles to the artery
e. Venules to the vein

ansa D

Benzene is sp2 hybridized while ethyne is sp hybridized.the more the pi-bond encounterd the more the reactivity.the pi-bond distorts da shape nd increase da bond angle by reducing the repulsion btwn da molecules.hop itz wel clear!

Simplefemo:
But I think benzene should be the correct answer since the degree of unsaturation in a benzene is higher than that of the corresponding alkyne,
2- The number of sigma and pi- bonds in benzene is higher.
Make your answer more elaborate as regard the 2nd question.

buzyguy: Benzene is sp2 hybridized while ethyne is sp hybridized.the more the pi-bond encounterd the more the reactivity.the pi-bond distorts da shape nd increase da bond angle by reducing the repulsion btwn da molecules.hop itz wel clear!

you're correct.besides,what school are you aspiring and what course?

Oau u.i,mbbs both. Urz?

t.boy007:
you're correct.besides,what school are you aspiring and what course?

Which of the following is insoluble in water a) ethanol b) HCl c) ether d) NH3. (2) which of the ffg will form a white precipitate with AgNO3 a) Butane b) ethene c) ethyne d) benzene 3)ethene will change the colour of KMnO4 from purple to what in an alkaline medium a)brown, b)yellow c)green d) reddish brown

edreesabiodun: Which of the following is insoluble in water a) ethanol b) HCl c) ether d) NH3. (2) which of the ffg will form a white precipitate with AgNO3 a) Butane b) ethene c) ethyne d) benzene 3)ethene will change the colour of KMnO4 from purple to what in an alkaline medium a)brown, b)yellow c)green d) reddish brown

edreesabiodun: Which of the following is insoluble in water a) ethanol b) HCl c) ether d) NH3. (2) which of the ffg will form a white precipitate with AgNO3 a) Butane b) ethene c) ethyne d) benzene 3)ethene will change the colour of KMnO4 from purple to what in an alkaline medium a)brown, b)yellow c)green d) reddish brown

1-c. 2-c. 3-c

which of da follown experimnt makz use of alkaline pyrogalol? a.germinatn b.respiratn c.photosynthesis d.transpiratn

It's 4 respiration they use alkaline pyrogallol for

No

Sarcasm01: It's 4 respiration they use alkaline pyrogallol for

edreesabiodun: 3) what is the first stage of treatment of water for township supply.

The first stage of treatment of water for township supply is sedimentation.

Michaellegend:
The first stage of treatment of water for township supply is sedimentation.

No. It's coagulation. Confirm from your textbook.

buzyguy: No

What's the answer then, remember alkaline pyrogallol is used to remove oxygen from air

edreesabiodun: No. It's coagulation. Confirm from your textbook.

D first stage is sedimentation, d second is stage is filteration, d third stage is coagulation and the fourth stage is disinfection

Germinatn,u cn chk tru a gud text.

edreesabiodun: What's the answer then, remember alkaline pyrogallol is used to remove oxygen from air

Watz da funtn of da mixture of argon-nitrogen in filling lamp filament or bulb?a.prevents reductn by air b.prevents oxidatn by co2 c.prevents blackening d.prevents rustn of da filament

buzyguy: Watz da funtn of da mixture of argon-nitrogen in filling lamp filament or bulb?a.prevents reductn by air b.prevents oxidatn by co2 c.prevents blackening d.prevents rustn of da filament

d. Prevents rustn of da filament

C-prevents blackenin of da filamnt

Michaellegend:
d. Prevents rustn of da filament

Michaellegend:
D first stage is sedimentation, d second is stage is filteration, d third stage is coagulation and the fourth stage is disinfection

who is teaching you this?

edreesabiodun: who is teaching you this?

Outline the process of purification of water for town supply

Michaellegend:
Outline the process of purification of water for town supply

coagulation, sedimentation, filtration and disinfecting.

buzyguy: which of da follown experimnt makz use of alkaline pyrogalol? a.germinatn b.respiratn c.photosynthesis d.transpiratn

photosynthesis

buzyguy: Watz da funtn of da mixture of argon-nitrogen in filling lamp filament or bulb?a.prevents reductn by air b.prevents oxidatn by co2 c.prevents blackening d.prevents rustn of da filament

The answer is C- to prevent blackening

edreesabiodun: Which of the following is insoluble in water a) ethanol b) HCl c) ether d) NH3. (2) which of the ffg will form a white precipitate with AgNO3 a) Butane b) ethene c) ethyne d) benzene 3)ethene will change the colour of KMnO4 from purple to what in an alkaline medium a)brown, b)yellow c)green d) reddish brown

1. C
2. C
3. C

edreesabiodun: coagulation, sedimentation, filtration and disinfecting.

hmmmmm... Dat is wrong.
Purification of water 4 town supply (1) water 4rm rainfal, river, lake or borehole is stord in a large tank and exposd to sunlight to kil bacteria during dis period sedimentation of insoluble matter occurs. (2) it is then filtered to remove large particles. (3) the water thereafter is passd through a flocculation tank where coagulant substances such as alum are added. Lime,Ca(OH)2 is added at dis stage to ensure favourable pH for flocculation. (4) it is treated with germicidal chemicals such as chlorine or bleaching powder to kill bacteria. CuSO4 crystal may also be added to inhibit fungal growth. D water is then ready for distribution.
Did u get dat.

Av u evr bn to water-coop. Or sn a water purifictn plant b4?if No,i guez so!

Michaellegend:
hmmmmm... Dat is wrong.
Purification of water 4 town supply (1) water 4rm rainfal, river, lake or borehole is stord in a large tank and exposd to sunlight to kil bacteria during dis period sedimentation of insoluble matter occurs. (2) it is then filtered to remove large particles. (3) the water thereafter is passd through a flocculation tank where coagulant substances such as alum are added. Lime,Ca(OH)2 is added at dis stage to ensure favourable pH for flocculation. (4) it is treated with germicidal chemicals such as chlorine or bleaching powder to kill bacteria. CuSO4 crystal may also be added to inhibit fungal growth. D water is then ready for distribution.
Did u get dat.

Wrong!

Simplefemo:
photosynthesis

Watz da funtn of calcium fluoride in the xtractn of ca?a.to prevent damag of electrdes b.to raise da meltn point of da electroly c.for economic purpose d.to reduce the rate of da reactn

Michaellegend:
hmmmmm... Dat is wrong.
Purification of water 4 town supply (1) water 4rm rainfal, river, lake or borehole is stord in a large tank and exposd to sunlight to kil bacteria during dis period sedimentation of insoluble matter occurs. (2) it is then filtered to remove large particles. (3) the water thereafter is passd through a flocculation tank where coagulant substances such as alum are added. Lime,Ca(OH)2 is added at dis stage to ensure favourable pH for flocculation. (4) it is treated with germicidal chemicals such as chlorine or bleaching powder to kill bacteria. CuSO4 crystal may also be added to inhibit fungal growth. D water is then ready for distribution.
Did u get dat.

I don't know who's teaching you this, but please check Ababio pg. 295.

buzyguy: Watz da funtn of calcium fluoride in the xtractn of ca?a.to prevent damag of electrdes b.to raise da meltn point of da electroly c.for economic purpose d.to reduce the rate of da reactn

the ansa is C becos it lowers the melting point...WHICH TXTBOOK DO U USE FOR BIO AND CHEM?I AM QUITE CHALLENGED WIT UR QUESTIONS AND ANSAS HERE ESP. URSELF,MAYORALL AND ODAS...AM AN ASPIRANT TOO AND WUD LIKE TO GET MORE QUESTIONS FROM YOU GUYS

where does aerobic respiration takes place in the body?
a.mitochondria
b.matrix
c. cytoplasm
d. crystae

sagaciousblog: where does aerobic respiration takes place in the body?
a.mitochondria
b.matrix
c. cytoplasm
d. crystae

Answer is A cos the mitochondrion is the power house of the body and its found in d cells.

Right!i use any txt bro 4both,bt mainly college for bio

sagaciousblog: the ansa is C becos it lowers the melting point...WHICH TXTBOOK DO U USE FOR BIO AND CHEM?I AM QUITE CHALLENGED WIT UR QUESTIONS AND ANSAS HERE ESP. URSELF,MAYORALL AND ODAS...AM AN ASPIRANT TOO AND WUD LIKE TO GET MORE QUESTIONS FROM YOU GUYS