luis Ortega

The tip of my penis stings when I pee. It’s not a super bad sting just a minor one, this has happened to me before and it usually goes away within 3-4 days. The last time it happened was around a year ago. I don’t want to go to the doctor right now with all this virus stuff going around. 

Does anybody think I should go. Or wait it out 

Solve the system by addition

4/5x + 1/10y = 11

7/5x - y = -16

Members of a racquetball club pay an annual membership fee. In​ addition, they pay a fee each time they play racquetball. Last​ year, Jay played racquetball 7272 times and paid the club a total of ​$12751275. Last​ year, Sammy played racquetball 3232 times and paid the club a total of ​$615615.

​a) Find a linear equation for the amount paid to the club by a member who plays racquetball x times a year.

​b) What is the annual membership fee at this​ club?

​c) What is the fee that is charged each time a member plays​ racquetball?

Given the following equation:

1 A (g) + 2 B (g) ↔ 1 C (g)

Calculate the value of K assuming the equilibrium concentrations of the three species are

[A] = 9.522 x 10-2 M, [B] = 1.370 x 10-2 M, and [C] = 1.163 x 10-2 M.

1. Once a chemical reaction has reached equilibrium, the reaction stops.

Select one:

True

False

2. Given the following equation:

1 A (g) + 2 B (g) ↔ 1 C (g)

Calculate the value of K assuming the equilibrium concentrations of the three species are

[A] = 9.522 x 10-2 M, [B] = 1.370 x 10-2 M, and [C] = 1.163 x 10-2 M.

1. The equilibrium equation for the formation of ammonia is

N2 (g) + 3 H2 (g) ↔ 2 NH3 (g)

At a given temperature, the concentrations of nitrogen, hydrogen and ammonia are measured and found to be:

[N2] = 4.12

[H2] = 5.87

[NH3] = 52.4

Calculate the value of K for this reaction.

2. At 250 Celsius, Kc = 1.80 for the decomposition of phosphorus pentachloride to phosphorus trichloride and chlorine gas. Which of the following mixtures are at equilibrium? (Choose all that apply)

Select one or more:

A. [PCl3] = 0.303 M, [PCl5] = 0.0085 M, [Cl2] = 0.303 M

B. [PCl3] = 0.66 M, [PCl5] = 2.16 M, [Cl2] = 0.66 M

C. [PCl3] = 0.65 M, [PCl5] = 0.047 M, [Cl2] = 0.65 M

D. [PCl3] = 3.45 M, [PCl5] = 1.15 M, [Cl2] = 0.60 M

1. At equilibrium the concentrations of the species involved are found to be 0.181 mol N2, 0.0313 mol H2, and 0.0006 mol NH3 in a 1.0 L reaction vessel at 375°C. Find the value of the equilibrium constant (K) for the reaction N2 (g) + 3 H2 (g) ⇌ 2 NH3 (g)

2. Approximately 0.00764 grams of iron (II) hydroxide, Fe(OH)2(s) dissolves in 1 liter of water at 22°C. Calculate the Ksp for Fe(OH)2 at this temperature.

1. An acidic solution could have a pH of

Select one:

a. 3.4

b. 7.0

c. 14.0

d. 8.0

2. Fill in the blanks below.

a. Bases feel ______

b. Acids taste ______ and bases taste _____

c. Acids turn phenophthlien _____and bases turn phenophthlien

3. Substances that produce an H+ ion in solution are called ______ ______ .

Substances that are proton donors are called ______ _______ _______.

Substances that are Proton Acceptors are called ______ _______ _______.

1. What is the pH of a solution where [H+] = 0.000045 M?

2. A solution of HCl is prepared and found to have a pH of 5.87. What is the concentration of the hydronium ion, H+?

3. A sample made of dilute hydrochloric acid is found to have a concentration of 0.00173 M. What is the pH of this solution?

1. If the pH of a solution is 7.5 then the [OH-] of the solution will be ______M.

2. A ______ in a chemical reaction speeds up a reaction without being consumed. An example that occurs within our bodies are ______ . They work by lowering the ______ in a chemical reaction.

1. Why do all reaction have an activation energy?

Select one:

a. They don't.

b. Molecules must have a minimum amount of energy and the proper orientation when they collide in order to react.

c. They have to get over the hump on the Energy Diagram.

d. Without the right amount of energy, the catalyst won't work properly.

2. Which of the following would cause a chemical reaction to proceed faster? (There may be more than 1 correct answer)

Select one or more:

a. Add a catalyst to the reaction.

b. Increase the volume.

c. Rate is dependant only on what the reactants are, nothing else.

d. Only use solid reactants.

e. Increase the concentration of the reactants.

f. Use a glass beaker instead of plastic.

g. Increase the temperature.

h. Lower the temperature.

1. A solution of HCl is prepared and found to have a pH of 5.87. What is the concentration of the hydronium ion, H+?

2. If the pH of a solution is 10.6 then the pOH will be ______.

3. If the [H+] of a solution is 3.1 M then the [OH-] will be ______M.

1.Which of the following would be considered Conjugate Pairs? (There may be more than 1 correct answer.)

Select one or more:

a. H2O and OH-

b. H2O and O2-

c. HCl and Cl-

d. HCl and NaOH

e. NH3 and NH4+

2. An acidic solution could have a pH of

Select one:

a. 3.4

b. 7.0

c. 14.0

d. 8.0

3. What is the pH of a solution that has a concentration of H+ of 0.00001989?

1. What is the molarity of a solution in which 79.29 grams of sodium nitrate are dissolved in 319.5 mL of solution?

2. Calculate the molarity of a solution that contains 3.70 g copper (II) sulfate in 416.6 mL water.

3. How many grams of calcium chloride will be needed to make 783.0 mL of 0.876 M solution?

1. Calculate the molarity of a solution that contains 71.7 g Al2(SO4)3in 437.4 mL water.

2. What is the molarity of a KNO3 solution made by dissolving 86.8 grams of KNO3 in enough water to make 326.5 mL of total solution?

3. A student is given 6.4 mol of barium nitrate and it is dissolved into 459 mL of water. What is the molarity?

1. A student is given 8.1 mol of K2S and it is dissolved into 1.9 L of water. What is the molarity?

2. What is the molarity of a solution that contains 2.9 grams of NaOH dissolved in 329.0 mL of solution?

3. Calculate the molarity of a solution that contains 57.2 g Zn(NO3)2in 420.4 mL water.

1. A student is given 8.1 mol of K2S and it is dissolved into 1.9 L of water. What is the molarity?

2. What is the molarity of a solution that contains 2.9 grams of NaOH dissolved in 329.0 mL of solution?

3. Calculate the molarity of a solution that contains 57.2 g Zn(NO3)2in 420.4 mL water.

1. A student is attempting to make up 500.0 mL of a 0.352 M solution of CuSO4 from a stock solution which has a molarity of 3.3 M. How many mL of the stock solution will they need to add to a 500.0 mL volumetric flask to make up the 0.352 M solution?

2. How many mL of 1.72 M HNO3 will I need to make 304.3 mL of 0.883 M solution?

1. What is the final volume of a 0.0500 M solution that is made using 10.0 mL of a 3.9 M solution of NaCl? (this is a dilution problem).

2. A student is attempting to make up 500.0 mL of a 0.361 M solution of FeCl3 from a stock solution which has a molarity of 4.9 M. How much of the stock solution will they need to add to a 500.0 mL volumetric flask to make up the 0.361 M solution?

1. What is the molarity of a solution that contains 2.9 grams of NaOH dissolved in 329.0 mL of solution?

2. What is the molarity of a KNO3 solution made by dissolving 86.8 grams of KNO3 in enough water to make 326.5 mL of total solution?

3. A student is given 2.9 mol of ZnSO3and it is dissolved into 307 mL of water. What is the molarity?