Laser_3

Reactivity

Reactivity

Give an explanation for the order of reactivity observed for the three saturated alkyl halides with Ag+.

2-Methyl-2-propyl (1 sec) Allyl  (1 sec) 2-Butyl (2 sec)

Brii   5539   N/A

Brii

Discuss the distinction between a graduated pipette and a volumetric pipette. Volumetric pipettes ...

Discuss the distinction between a graduated pipette and a volumetric pipette. Volumetric pipettes ...

Discuss the distinction between a graduated pipette and a volumetric pipette. Volumetric pipettes are used to transfer one specified volume of liquid while graduated pipettes are used to transfer volumes other than specific volumes for which volumetr

vern   3661   N/A

vern

saturated alkyl halides

saturated alkyl halides

Explain the order of reactivity for the three saturated alkyl halides with I-

Brii   4713   N/A

Brii

effective deprotonation

effective deprotonation

I'm stuck. Can someone please show me how to determine why all of the following would effectively deprotonate benzoic acid (phcooh):
(i would not have access to pKa values...please show me reactions thought process)

i-PrMgBr

kblitz   4146   N/A

kblitz

Thinkwell Chem Lab #4 Help!

Thinkwell Chem Lab #4 Help!

I need help with the Thinkwell Chem Lab #4. Thanks!

sholland90   1496   N/A

sholland90

last question....help

last question....help

2-How many grams of Methanol CH3OH; MM=32g/mol) must be added to a 500 mL of water to prepare a solution that is 15%(m/v) CH3OH?  What is the Molarity of this solution (grams solute/mL of solution)x100; M=mols solute/L of solution)?

poshmom   713   N/A

poshmom

Please I need help.

Please I need help.

Suppose you performed a distillation of a solution containing butyl alcohol (C4H10O, also known as 1-butanol), sec-butyl alcohol (C4H10O, also known as 2-butanol), and ethyl alcohol (C2H6O). Butyl alcohol and sec-butyl alcohol have the same chemical

francsima404   1928   N/A

francsima404

lewis structures

lewis structures

Ok I have figured out H2, CH4 NH3, H2O, and CO2, but I am having trouble with the rest.  Please help

What is the formula, the lewis structure, #of valance electrons, Molecular Geometry, Make a 3D drawing and is it Polar or non polar f

poshmom   831   N/A

poshmom

LAb... HELP!

LAb... HELP!

Titration Lab... Please help!


Suppose I wanted to calculate the pH of the acid used in this titration. How (explain) can I use the results from this experiment to do this? What would the pH be in this case? Show all work.

Charlie   902   N/A

Charlie

LAB...Help!

LAB...Help!

Titration Lab.. Please Help!

In a titration, assuming it is carried out just like the one in this lab exercise, how do you determine the number of moles of acid used? How do you then use this information to determine the concentration of t

Charlie   861   N/A

Charlie

If a solution contains 28 g of potassium nitrate per 100 g of water at 25 degrees Celsius, is the ...

If a solution contains 28 g of potassium nitrate per 100 g of water at 25 degrees Celsius, is the ...

If a solution contains 28 g of potassium nitrate per 100 g of water at 25 degrees Celsius, is the solution unsaturated, saturated, or supersaturated?

Charlie   1252   N/A

Charlie

What is the role of vacuum filtration in this process of Recrystallization?

What is the role of vacuum filtration in this process of Recrystallization?

(d) (2 pts.) What is the role of vacuum filtration in this process of Recrystallization? How do you do it?

Answer:

sholland90   2255   N/A

sholland90

If a solution contains 28 g of potassium nitrate per 100 g of water at 25 degree

If a solution contains 28 g of potassium nitrate per 100 g of water at 25 degree

(e) (2 pts.) Suppose we are dealing with potassium nitrate as opposed to the chemical in the video. If a solution contains 28 g of potassium nitrate per 100 g of water at 25 degrees Celsius, is the solution unsaturated, saturated, or supersaturated?

sholland90   3961   N/A

sholland90

another serial dilution question

another serial dilution question

If you had a dilution where you took 0.5 parts sample to 9.5 parts dilutents, what is the value of the actual dilution you performed? this is a review for us, and I forgot how to do these crazy dilution problesm,=. thx if you can help

oldcollegelady   878   N/A

oldcollegelady

Chemical Reactions

Chemical Reactions

Chemical reactions are happening around us all the time; the CO2 in a can of soda is at equilibrium, batteries, fuel cells, acid rain, decaffeination of coffee (why bother?), reaction of sunscreen with skin, and on and on and on. There are also a num

tink571937   928   N/A

tink571937

Calculting in Chemistry

Calculting in Chemistry

(A.) Calculate the cost per gram (g) of synthetic baccatin III, the Taxol precursor, using the following assumptions. Basically, what you are doing here is calculating how much it would cost to just synthesize the chemical needed to make Taxol in the

tink571937   1155   N/A

tink571937

Questions about Buffers and pH levels and such.....

Questions about Buffers and pH levels and such.....

Research a buffer system that interests you and report the following:
 
(A)    What is the system that is buffered?
(B)    What is the pH of the system?
(C)    What compounds are responsible for the b

tink571937   852   N/A

tink571937

1d. determine the number of grams of water required at 100 Celsius to dissolve a

1d. determine the number of grams of water required at 100 Celsius to dissolve a

1d. determine the number of grams of water required at 100 Celsius to dissolve a mixture containing 20 g KNO3 and 2.0 g CuSO4*5H20 assuming that the solubility of one substance is not affected by the presence of another.

2. to the solution

sesait   3856   N/A

sesait

Really need help in chemisty 161Lab

Really need help in chemisty 161Lab

I need help with my lab worksheet.... i have no clue to anything. its somewhat like the question asked by jellyfish on sept. 27, 2010. "overall reaction of zinc metal and tincture of iodine". But this is a continuation of it, afterwards i a

johnt   880   N/A

johnt

Recrystallization....Last CHEM LAB, Any Takers

Recrystallization....Last CHEM LAB, Any Takers

(a) Describe, in as much detail as possible, the process of recrystallization as a method for purification of a solid. How does it work? What do you do?

Answer:

(b) How do you make a “supersaturated” solution? How is this differ

Sbljml   1751   N/A

Sbljml

What is the correct value for Avogadro's number?

What is the correct value for Avogadro's number?

Question 1 of 12    4.0/ 4.0 Points
What is the correct value for Avogadro's number?

A. 6.022 × 102.3   

B. 6.022 × 1033   

C. 6.023 × 1022   
   

D. 6.022 × 1023   

E. none of the above   

tater218   14581   N/A

tater218

A balloon filled with 0.500 L of air at sea level is submerged in the water to a depth that produces

A balloon filled with 0.500 L of air at sea level is submerged in the water to a depth that produces

Question 1 of 12    0.0/ 4.0 Points
A balloon filled with 0.500 L of air at sea level is submerged in the water to a depth that produces a pressure of 3.25 atm. What is the volume of the balloon at this depth?

A. 1.63 L   

B. 0

tater218   10394   N/A

tater218

An ideal monatomic gas undergoes an isothermal expansion. It is correct to affir

An ideal monatomic gas undergoes an isothermal expansion. It is correct to affir

An ideal monatomic gas undergoes an isothermal expansion. It is correct to affirm that its entropy
A) decreases.
B) remains unchanged.
C) increases.
D) cannot be predicted with the data given.

ppk   1878   N/A

ppk

What is meant by "the heat death of the universe"?

What is meant by "the heat death of the universe"?

What is meant by "the heat death of the universe"?
A) The universe will end in a giant inferno.
B) The universe will reach thermal equilibrium.
C) Some day the sun will explode and we will all burn.
D) Some day the sun w

ppk   1128   N/A

ppk

Which of the following is a statement of the third law of thermodynamics?

Which of the following is a statement of the third law of thermodynamics?

Which of the following is a statement of the third law of thermodynamics?
A) If two objects are in equilibrium with a third, then they are in thermal equilibrium with one another.
B) The entropy of the universe cannot decrease.
C) The

ppk   629   N/A

ppk

One of the most efficient engines built so far has the following characteristics

One of the most efficient engines built so far has the following characteristics

One of the most efficient engines built so far has the following characteristics:  combustion chamber temperature = 1900°C, exhaust temperature = 430°C, 7.0 × 109 cal of fuel produces 1.4 × 1010 J of work in one hour. 
(a)  What

ppk   1345   N/A

ppk

An athlete doing push-ups performs 650 kJ of work and loses 425 kJ of heat. What

An athlete doing push-ups performs 650 kJ of work and loses 425 kJ of heat. What

An athlete doing push-ups performs 650 kJ of work and loses 425 kJ of heat. What is the change in the internal energy of the athlete?
A) -225 kJ
B) -1075 kJ
C) 1075 kJ
D) 225 kJ
E) 276 kJ

ppk   3376   N/A

ppk

1.50 moles of an ideal monatomic gas are initially at a temperature of 317 K. If

1.50 moles of an ideal monatomic gas are initially at a temperature of 317 K. If

1.50 moles of an ideal monatomic gas are initially at a temperature of 317 K. If the gas gains 2730 J of heat and performs 780 J of work, what is its final temperature?
A) 359 K
B) 421 K
C) 526 K
D) 687 K
E) 756 K

ppk   2110   N/A

ppk

A gas expands from an initial volume of 30.0 L to a final volume of 65.0 L at a

A gas expands from an initial volume of 30.0 L to a final volume of 65.0 L at a

A gas expands from an initial volume of 30.0 L to a final volume of 65.0 L at a constant pressure of 110 kPa. How much work is done by the gas?
A) 3.85 kJ
B) 10.4 kJ
C) 3850 kJ
D) 10.4 MJ
E) 3.85 MJ

ppk   2963   N/A

ppk

3.0 moles of gas expand from an initial volume of 0.040 m3 to a final volume of

3.0 moles of gas expand from an initial volume of 0.040 m3 to a final volume of

3.0 moles of gas expand from an initial volume of 0.040 m3 to a final volume of 0.085 m3 while the temperature of the gas is kept fixed at 300 K. How much work is done by the system?
A) 5.6 kJ
B) 6.6 kJ
C) 7.6 kJ
D) 8.6 kJ
E)

ppk   1626   N/A

ppk

A gas expands from an initial volume of 0.040 m3 and an initial pressure of 210

A gas expands from an initial volume of 0.040 m3 and an initial pressure of 210

A gas expands from an initial volume of 0.040 m3 and an initial pressure of 210 kPa to a final volume of 0.065 m3 while its temperature is kept constant. How much work is done by the system?
A) 3.7 kJ
B) 4.1 kJ
C) 5.3 kJ
D) 5.6 kJ

ppk   1760   N/A

ppk

A gas expands at constant temperature from an initial volume of 0.040 m3 and an

A gas expands at constant temperature from an initial volume of 0.040 m3 and an

A gas expands at constant temperature from an initial volume of 0.040 m3 and an initial pressure of 210 kPa until its pressure drops to 135 kPa. How much work is done by the system?
A) 3.0 kJ
B) 3.7 kJ
C) 4.1 kJ
D) 5.6 kJ
E)

ppk   1801   N/A

ppk

A gas expands from an initial volume of 0.040 m3 to a final volume of 0.085 m3 w

A gas expands from an initial volume of 0.040 m3 to a final volume of 0.085 m3 w

A gas expands from an initial volume of 0.040 m3 to a final volume of 0.085 m3 while its pressure increases linearly with the volume (so that the process follows a straight-line path in a P-V diagram) from 110 kPa to 225 kPa. How much work is done by

ppk   3155   N/A

ppk

A 40.0-L container is divided into two equal parts by a rubber membrane. One hal

A 40.0-L container is divided into two equal parts by a rubber membrane. One hal

A 40.0-L container is divided into two equal parts by a rubber membrane. One half of the container has 1.50 moles of an ideal monatomic gas at 250 K, and the other half is a vacuum. The container is well insulated, so there is no exchange of heat wit

ppk   1032   N/A

ppk

A monatomic ideal gas with an initial pressure of 500 kPa and an initial volume

A monatomic ideal gas with an initial pressure of 500 kPa and an initial volume

A monatomic ideal gas with an initial pressure of 500 kPa and an initial volume of 1.80 L expands isothermally to a final volume of 5.20 L. How much work is done on the gas in this process?
A) 955 J
B) 900 J
C) 875 J
D) 1570 J

ppk   1959   N/A

ppk

How much heat is required to raise the temperature of 2 moles of an ideal monato

How much heat is required to raise the temperature of 2 moles of an ideal monato

How much heat is required to raise the temperature of 2 moles of an ideal monatomic gas by 10 C° at constant volume?
A) 249 J
B) 416 J
C) 208 J
D) 200 J
E) 125 J

ppk   1486   N/A

ppk

A certain ideal gas has a molar specific heat at constant volume Cv = 7R/5. What

A certain ideal gas has a molar specific heat at constant volume Cv = 7R/5. What

A certain ideal gas has a molar specific heat at constant volume Cv = 7R/5. What is its molar specific heat at constant pressure?
A) 12R/5
B) 7R/3
C) 12R/7
D) 12R/5
E) 4R

ppk   2814   N/A

ppk

20.0 L of a monatomic ideal gas at a pressure of 100 kPa expand adiabatically un

20.0 L of a monatomic ideal gas at a pressure of 100 kPa expand adiabatically un

20.0 L of a monatomic ideal gas at a pressure of 100 kPa expand adiabatically until the volume doubles. What is the pressure in the gas at that point?
A) 31.5 kPa
B) 50.0 kPa
C) 200 kPa
D) 317 kPa
E) 400 kPa

ppk   727   N/A

ppk

700 J of heat are added to 12 moles of an ideal monatomic gas at constant volume

700 J of heat are added to 12 moles of an ideal monatomic gas at constant volume

700 J of heat are added to 12 moles of an ideal monatomic gas at constant volume. What is the change in temperature?
A) 4.7 K
B) 5.2 K
C) 5.8 J
D) 6.8 K
E) 9.3 K

ppk   1036   N/A

ppk

How much heat is required to increase the temperature of 1.70 moles of an ideal

How much heat is required to increase the temperature of 1.70 moles of an ideal

How much heat is required to increase the temperature of 1.70 moles of an ideal monatomic gas by 23.0 K at constant pressure?
A) 812 J
B) 346 J
C) 751 J
D) 391 J
E) 290 J

ppk   1653   N/A

ppk