Consider the titration of 100.0 mL of 1.00 M HA (Ka=1.0*10^-6) with 2.00 M NaOH.

A. Determine the pH before the titration begins

B. Determine the volume of 2.00 M NaOH required to reach the equivalence point

C. Determine the pH after a total of 25.0 mL of 2.00 M NaOH has been added

D. Determine the pH at the equivalence point of the titration.

Thank you in advance!

A 3 kg ball is attached to a tree branch by a 2.0 m long rope. It is released from rest when the string is parallel to the ground. Just at it swings to its lowest point, it collides elastically head-on with a 2 kg ball of the same dimension, but going in the opposite direction. The 3 kg ball rebounds at a speed of 13 m/s after the collision. Find the speed of the 2 kg ball before the collision.

You wish to retire in 18 years , at which time , you want to have accumulated enough money to receive an annuity of $500 monthly for 20 years of retirement. During the period before retirement you can earn 4% annually,while after retirement you can earn 6 percent on your money. What monthly contributions to the retirement fund will allow you to receive the 500 dollars annuity?

A 1.500 L flask is filled with a mixture of 1.20 g H2 and 8.40 g O2, at 25°C. The mixture is ignited, and hydrogen and oxygen combine to form water. What is the total pressure inside the flask before the reaction? (Report your answer in units of atmospheres.) What is the total pressure after the reaction, once the flask is returned to 25°C? (Vapour pressure of water at 25°C is 23.8 mm Hg.)

An instructor who taught two sections of engineering statistics last term (the first with 20 students and the second with 30), decided to assign a term project. After all projects had been turned in, the instructor randomly ordered them before grading. Consider the first 15 graded projects.

a. What is the probability that exactly 10 of these are from the second section? b. What is the probability that at least 10 of these are from the second section?

1. Use the Direct Method to allocate Service Department Costs to the Operating Departments based on number (percentage) of employees.

Attacking Dept = 110 employees

Shark Dept = 135 employees

Given a loan with the following characteristics:

Co = 50,000€

Annual effective interest 6% to be amortized in 6 years, and knowing it is a level-fixed payment-rate loan.

Just before making the payment of the second annuity, it is decided to change the amortization method, starting to be amortized through constant principal repayments loan.

a) Outstanding debt just after making the payment of the 3th annuity

b) Amortization schedule for the last 3 years

On a frictionless, horizontal air table, puck A (with mass 0.250 kg ) is moving toward puck B (with mass 0.400 kg ), which is initially at rest. After the collision, puck A has a velocity of 0.150 m/s to the left, and puck B has a velocity of 0.620 m/s to the right.

a.What was the speed of puck A before the collision?

b. Calculate the change in the total kinetic energy of the system that occurs during the collision.

Revenues (Inflows)

1. Does the organization that you work for receive revenue after services are delivered or before? Why do you think this is?
2. What grouping of revenue do you believe the organization that you work for uses (service line, revenue source, etc.)? Why do you think they chose this grouping? Is this a good choice or do you think there is a better
   option?

(use a Pharmacy or doctor office as example please )

1.If profit after tax and interest is $400,000; interest expense is $50,000 and taxation expense is $84,000; profit before interest and tax is:

2.If the beginning balance of equity is $82,000; the ending balance is $37,000; and the loss for the period is $33,000; how much did the owner withdraw during the period for personal use?

3.The balance sheet usually reports the entity's financial position for both the current period and the previous period. This information is known as: