castrokiller:
try again.... Just note that compression is the area where sound waves are pushed together

What's the correct answer please

Nuel25846:

The answer is D.d=2m

Close but not correct
How did you get 2?

castrokiller:
b

You're correct.
Mind telling us why you chose b?

Optimist1998:

Close but not correct
How did you get 2?

I have seen my mistake....it suppose to be 3*1/2 and I did 4*1/2..........displacement=average velocity * time.

Chemistry:
In what way is equilibrium constant for the forward reaction related to that of the reversed reaction?

Nuel25846:

I have seen my mistake....it suppose to be 3*1/2 and I did 4*1/2..........displacement=average velocity * time.

Wow your method is even better.
I calculated the area of the two triangles within the 2nd and 5th second then summed them up.

Optimist1998:
Wow your method is even better.
I calculated the area of the two triangles within the 2nd and 5th second then summed them up.

either way I still got it wrong.

Optimist1998:
Wow your method is even better.
I calculated the area of the two triangles within the 2nd and 5th second then summed them up.

Optimist1998....something abt u got my attention....is there any way we can talk privately??

Chemical Equilibrium*
Which of the following is TRUE of Le Chatelier's Principle for an exothermic reaction?
A. Increase in temperature will cause an increase in the equilibrium constant
B. Increase in temperature will cause a decrease in the equilibrium constant
C. Addition of a catalyst will cause an increase in the equilibrium constant
D. Addition of a catalyst will cause a decrease in the equilibrium constant

When writing the equilibrium constant of a reaction, which of the is considered
A. gaseous and solid species
B. liquid and solid species
C. solid and dissolved species
D. gaseous and dissolved species

Nuel25846:

Optimist1998....something abt u got my attention....is there any way we can talk privately??

Yeah sure
You can send a PM

3Fe + 4H2O <----> Fe3O4 + 4H2
The equilibrium constant K of the reaction above is represented as
A. [H2]4 / [H2O]4
B. [Fe]3 [H2O]4 / [Fe3 O4] [H2]4
C. [Fe3O4] [H2] / [Fe] [H2O]
D. [H2O]4 / [H2]4

One method of driving the position of equilibrium of an endothermic reaction forward is to?
A. increase temperature at constant pressure
B. dcrease pressure at constant temperature
C. cool down the apparatus with water
D. decreases temperature at constant pressure

3Fe + 4H2O <----> Fe3O4 + 4H2 The equilibrium constant K of the reaction above is represented as A. [H2]4 / [H2O]4 B. [Fe]3 [H2O]4 / [Fe3 O4] [H2]4 C. [Fe3O4] [H2] / [Fe] [H2O] D. [H2O]4 / [H2]4 Ans.A

Equilibrium constant can be used to
A. predict direction of chemical reaction
B. predict extent of chemical reaction
C. determine the equilibrium concentration of mixture
D. all of above

Conditions for equilibrium of concentration of reactant and products will be same if
A. temperature is constant
B. pressure or volume is constant
C. concentration of products and reactants are same
D. all of above

Nuel25846:
3Fe + 4H2O <----> Fe3O4 + 4H2
The equilibrium constant K of the
reaction above is represented as
A. [H2]4 / [H2O]4
B. [Fe]3 [H2O]4 / [Fe3 O4] [H2]4
C. [Fe3O4] [H2] / [Fe] [H2O] D. [H2O]4 / [H2]4
Ans.A

Oya explain to everyone

Solubility:
Methanol and water are
A. miscible
B. non miscible
C. forms saturated solution
D. forms supersaturated solution

Solubility of Na2SO4
A. increases with increase in temperature
B. decreases with increase in temperature
C. no effect on solubility with change in temperature
D. none of above

Optimist1998:
Oya explain to everyone

. It gonna be difficult using brackets.

Solubility: Methanol and water are A. miscible B. non miscible C. forms saturated solution D. forms supersaturated solution Ans.A

Nuel25846:
Solubility: Methanol and water are
A. miscible
B. non miscible
C. forms saturated solution
D. forms supersaturated solution
Ans.A

correct..... but why?
This one doesn't have bracket

Optimist1998:
Chemistry:
In what way is equilibrium constant for the forward reaction related to that of the reversed reaction?

the product of d two reaction is equal to 1

Which of the following pairs of salts undergo hydrolysis?A. AlCI 3 and NH4 CI
B. AICI3 and NaCI
C. FeCI3 and KCI
D. Na2SO4 and K2SO4

Any Salt formed from a strong acid and a weak base can undergo hydrolysis.
Eg NH4Cl + H2O <--> NH3 and HCL

Cc: samanN

Optimist1998:
Chemical Equilibrium*
Which of the following is TRUE of Le Chatelier's Principle for an exothermic reaction?
A. Increase in temperature will cause an increase in the equilibrium constant
B. Increase in temperature will cause a decrease in the equilibrium constant
C. Addition of a catalyst will cause an increase in the equilibrium constant
D. Addition of a catalyst will cause a decrease in the equilibrium constant

When writing the equilibrium constant of a reaction, which of the is considered
A. gaseous and solid species
B. liquid and solid species
C. solid and dissolved species
D. gaseous and dissolved species

. First is b. second one should be D

felix00:
the product of d two reaction is equal to 1

Correct........
Defend your choice

Optimist1998:
3Fe + 4H2O <----> Fe3O4 + 4H2
The equilibrium constant K of the reaction above is represented as
A. [H2]4 / [H2O]4
B. [Fe]3 [H2O]4 / [Fe3 O4] [H2]4
C. [Fe3O4] [H2] / [Fe] [H2O]
D. [H2O]4 / [H2]4

One method of driving the position of equilibrium of an endothermic reaction forward is to?
A. increase temperature at constant pressure
B. dcrease pressure at constant temperature
C. cool down the apparatus with water
D. decreases temperature at constant pressure

. First one is A. Second one is A.

Optimist1998:
correct..... but why This one doesn't have bracket

. Methanol is soluble in water?

felix00:
.
Methanol is soluble in water?

Very much soluble due to the presence of -OH group.

Optimist1998:
Solubility:
Methanol and water are
A. miscible
B. non miscible
C. forms saturated solution
D. forms supersaturated solution

Solubility of Na2SO4
A. increases with increase in temperature
B. decreases with increase in temperature
C. no effect on solubility with change in temperature
D. none of above

Dude for d second one u bad oooo.
Anyways d ans should be D, solubility of na2so4 increases to a certain temp with increase in temp before it start decreasing.
On a side note am pretty sure u form dat question

felix00:

Dude for d second one u bad oooo.
Anyways d ans should be D, solubility of na2so4 increases to a certain temp with increase in temp before it start decreasing.
On a side note am pretty sure u form dat question

Lol...... You're really good at chemistry
@bold I got the question from a chemistry MCQ and I failed it

Optimist1998:
Lol...... You're really good at chemistry @bold I got the question from a chemistry MCQ and I failed it

u dey whine me abi? I got lucky. What is d meaning of MCQ

felix00:

u dey whine me abi? I got lucky.
What is d meaning of MCQ

Multi Choice Question

Optimist1998:
Multi Choice Question

Never heard of it

felix00:

Never heard of it

Nah you have
Standardized questions with A B C D options that you can choose from eg Jamb, SAT, Mcat.

Optimist1998:

Nah you have
Standardized questions with A B C D options that you can choose from eg Jamb, SAT, Mcat.

Thank u 4 breaking dat down for me.
What course do u wanna study and wat school..... I can't afford to be competing with someone like you for admission