Evaluate the fugacity for a gas of Ar at 100 bar and 298 K
In: Chemistry
1A. A 1.54 gram sample of an unknown gas is found to occupy a volume of 0.780 L at a pressure of 728 mm Hg and a temperature of 33°C. The molecular weight of the unknown gas is
1B.A sample of an unknown gas is found to have a density of 1.03 g/L at a pressure of 0.609 atm and a temperature of 38°C. The molecular weight of the unknown gas is
1c.A 7.64×10-2 mol sample of O2 gas is contained in a 2.00 L flask at room temperature and pressure. What is the density of the gas, in grams/liter, under these conditions?
In: Chemistry
What is the importance of the Sandmeyer Reaction?
What is the azide group and why it is a good leaving group?
Explain how the mechanism of the Sandmeyer reaction differs of a typical Electrophylic Aromatic Substitution reaction
In: Chemistry
Skeletal Equation: IO3+(aq)+HSO3-(aq)->I-(aq)+SO42-(aq)
A) Which of the following correctly identifies the number of electrons transferred per entity?
6e-/S
2e-/S
4e-/I
3e-/I
B) Balance the Skeletal Equation
C) When the skeletal equation is balanced under acidic conditions, the amount of electrons transferred is ___ mol.
Unfortunately, I am unable to find anything in my textbook regarding the number of electrons transferred in a redox reaction, especially per entity. Would someone give me a hand?
In: Chemistry
A sample of an ideal gas occupies a volume of 25.0 liters at a pressure of 1.20 atm and a temperature of 75 degrees C. How many moles of gas are present in the container?
In: Chemistry
A sealed 1.0-L flask, initially containing 0.20 M COCl2, 0.20 M Cl2, and 0.20 M CO, is heated to 700 K
and allowed to come to equilibrium.
COCl2(g) ⇌ Cl2(g) + CO(g) Kc = 0.12 at 700 K
a. What are the molar concentrations of COCl2, Cl2, and CO once the reaction has reached equilibrium
at 700 K?
COCl2:_______________________________
Cl2:_______________________________
CO:_______________________________
b. 0.10 mol COCl2 is added to the equilibrium mixture. What are the molar concentrations of COCl2,
Cl2, and CO once equilibrium is re-established?
COCl2:_______________________________
Cl2:_______________________________
CO:_______________________________
In: Chemistry
After mixing 5.00 mL of the 5.0×10–5 M crystal violet solution with 5.00 mL of 0.20 M NaOH, what is the concentration of crystal violet and hydroxide ions in the solution at the start of the reaction? Is it a reasonable assumption that the concentration of OH– is much greater than that of CV+? Why is this an important assumption? Explain.
In: Chemistry
Consider the reaction
N2(g)
+
3H2(g)
→
2NH3(g)ΔH
|
o |
|
rxn |
= −92.6 kJ/mol
If 2.0 moles of N2 react with
6.0 moles of H2 to form
NH3, calculate the work done (in
joules) against a pressure of 1.0 atm at 25 degrees
celsius.
What is ΔU for this reaction? Assume the reaction goes to completion.
In: Chemistry
1. The pH of a solution made of 1.0 M acetic acid and 0.1 M potassium acetate is (K_a = 1.8 x 10^-5) to which 0.001 mol of KOH has been added: a) pH = 4.74 b) pH = 4.73 c) pH = 8.92 d) pH = 4.46 e) pH = 11.55 The answer is not 4.74!!
2. The pH of a solution made of 1.0 M acetic acid and 0.1 M potassium acetate is (K_a = 1.8 x 10^-5) to which 0.001 mol of HCl has been added: a) pH = 1.64 b) pH = 4.75 c) pH = 3.28 d) pH = 8.90
In: Chemistry
In: Chemistry
Ca2+ S2- OH- Fe3+ I-
|
pH |
pOH |
[H+], M |
[OH-], M |
Is it acidic, basic or a neutral soln? |
|
|
2. |
2.6 |
||||
|
3. |
3.4 |
||||
|
4. |
3.2 x 10-9 |
||||
|
5. |
4.7 x 10-3 |
||||
|
6. |
1 x 10-7 |
In: Chemistry
Consider the following reaction:
CO(g)+H2O(g)⇌CO2(g)+H2(g)
Kp=0.0611 at 2000 K
A reaction mixture initially contains a CO partial pressure of 1346
torr and a H2O partial pressure of 1762 torr at 2000 K.
A.) Calculate the equilibrium partial pressure of CO2.
B.) Calculate the equilibrium partial pressure of H2
In: Chemistry
With respect to proteomics and Mass Spec, what is Data Dependent Acquisition and how does it affects dynamic range of proteome measurements?
In: Chemistry
The Ka of a monoprotic weak acid is 2.50 × 10-3. What is the percent ionization of a 0.176 M solution of this acid?
In: Chemistry
A compound with the formula XOCl3 is synthesized, isolated and purified.
When 3.270 g of this compound are decomposed chemically, a solution of chloride ions is produced.
The chloride ions are precipitated with silver ions and 9.170 g of silver chloride, AgCL, are produced.
What are the identity and molar mass of the element X?
This is likely on my final and my professor did not explain how to solve in class, he just laid it out there and 96% of the class failed the question. Thank you for any help!
In: Chemistry