A solution prepared by mixing 50.2 mL of 0.280 M AgNO3 and 50.2 mL of 0.280 M TlNO3 was titrated with 0.560 M NaBr in a cell containing a silver indicator electrode and a reference electrode of constant potential 0.175 V. The reference electrode is attached to the positive terminal of the potentiometer, and the silver electrode is attached to the negative terminal. The solubility constant of TlBr is Ksp = 3.6 × 10–6 and the solubility constant of AgBr is Ksp = 5.0 × 10–13..

What is the cell voltage when the following volumes of 0.560 M NaBr have been added?

(b) 1.0 mL (c) 16.1 mL (d) 24.1 mL (e) 25.0 mL (f) 25.4 mL (g) 41.2 mL (h) 50.2 mL (i) 57.2 mL

Please show step by step

Colby and Emmy are identical twins except for their vision. The retina is 1.8 cm behind the pupil in the eye. Colby’s prescription is -1.0 diopter, whereas Emmy’s prescription is +0.5 diopter. We use standard convention: we read a book at the distance 25-cm from the eyes and see objects very far from the eyes. Colby and Emmy wear identical frames at the distance 2.0 cm in front of their eyes.

a) Find the range of the power of the lens in Colby’s eyes.

b) Find the range of the power of the lens Emmy’s eyes.

c) Colby accidentally wears Emmy’s glasses. What is the range of object distances that Colby can see clearly?

d) Emmy accidentally wears Colby’s glasses. What is the range of object distances that Emmy can see clearly?

According to IRPT, only the most skilled arbitrageurs are able to earn pure profits from their covered interest arbitrage activities. TRUE OR FALSE?

Aluminum sells in the U.S. for $225/unit, and sells in Canada for CD150/unit. If the spot rate is $1.75/CD, arbitrageurs would buy aluminum in Canada and sell it in the U.S. TRUE OR FALSE?

PPP holds equally for services and for commodities. TRUE OR FALSE?

The current spot rate is $0.95 = 1.0, and interest rates on 1-yr risk-free securities in Europe and the U.S. are 9% and 4% respectively. Your employer asks you to negotiate a 1-yr forward contract that will enable him to exchange dollars for 1,000,000. If a bank quotes a forward rate of $0.93, on a 1-year contract, you should accept it. TRUE OR FALSE?

Just answers.

A. A buffer solution that is 0.431 M in HClO and 0.431 M in NaClO has a pH of 7.46.

(1) The addition of 0.01 mol of H₃O⁺ to 1.0 L of this buffer would cause the pH to _________(increase slightly, increase by 2 units,decrease slightly,decrease by 2 units,not change.)

(2) The capacity of this buffer for added OH^- could be increased by the addition of 0.147 mol  _________(of the weak acid,of the salt.)

B. How many grams of solid sodium fluoride should be added to 2.00 L of a 5.23×10^-2M hydrofluoric acid solution to prepare a buffer with a pH of 3.816 ?

grams sodium fluoride =  g.

C.How many grams of solid ammonium bromide should be added to 2.00 L of a 0.287 M ammonia solution to prepare a buffer with a pH of 8.740 ?  

grams ammonium bromide =

A bottled water distributor wants to determine whether the mean amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company is actually 1 gallon. You know from the water bottling company specifications that the standard deviation of the amount of water per bottle is 0.03 gallon. You select a random sample of 100 bottles, the mean amount of water per 1-gallon bottle is 0.994 gallon.

a. Is there evidence that the mean amount is different from 1.0 gallon? (Use ? = 0.01)

b. Compute the p-value and interpret its meaning.

c. Construct a 95% confidence interval estimate of the population mean amount of water per bottle.

d. Compare the results of (a) and (c). What conclusions do you reach?

A child of mass m_c = 35 kg stands on the rim of a frictionless merry go round, which acts like a solid disk of mass m_m = 55 kg and radius r = 1.1 m. With the merry go round at rest, they throw a rock of mass m_r = 1.0 kg with a velocity v = 18 m/s relative to the ground in a direction horizontal to the ground, and tangent to the rim of the merry go round.

1. What is the magnitude of the angular momentum of the rock around the axis of the merry go round?
2. What is the angular velocity of the merry go round after the rock is thrown?
3. One of the child’s friends holds their hand against the rim of the merry go round and causes it to stop in a time interval of 3.2 s. What is the magnitude of the frictional force applied?

QUIZ 4:- Assume that you have the following information:- Market Info:- Real interest rate = 2.0%; Expected inflation = 4.0%; Rm = 12.0%; Tax = 30.0%. Com. Stock info:- Par value = $1.0 ; Market value (price) = ?? ; Beta = 1.60 ; No. of outstanding shares = 1,000,000.0 ; EPS $3.0 ; pay-out ratio = 30.0%; Growth in EPS & Dividends = 5.0% ; Preferred Stock info:- Par value = $100.0; Dividend per share = 10.0%; Rp=8.0%; No. of outstanding shares = 100,000.0; Price = ???? Bonds info:- Par value = $1,000.0; Coupon interest = 4.0% ; YTM = 6.0%; Time to maturity = 20 years ; No. of bonds = 100.0; Price = ???

1- Calculate the WACC using historical weights in the capital structure.

2 - Calculate the WACC using market weights in the capital structure.

A disc with radius 0.060 m and rotational inertia 0.061 kg.m^2 has a rope wrapped around its parameter. The other end of the rope is holding a 0.20 kg mass. The mass is held at 1.0 m above the floor. You release the mass from rest. This causes the disc to spin and the mass to fall. How long does it take the mass to fall to the ground?

Hint: use torque and angular acceleration.

A solid sphere of radius 0.13 m and mass 0.25 kg rolls down an incline plane without slipping. If the incline plane is 0.40 m tall and has an angle of 24° then how long does it take the sphere to roll down the incline plane?

Hint: rotational inertia of a solid sphere is 2/5*(mr^2).

7.26 Sales-Value-at-Split-off Method

Allocate the joint costs using the sales-value-at-split-off method.

Alomar Company manufactures four products from a joint production process: barlon, selene, plicene, and corsol. The joint costs for one batch are as follows:

Direct materials $67,900

Direct labor 34,000

Overhead 25,500

At the split-off point, a batch yields 1,400 barlon, 2,600 selene, 2,500 plicene, and 3,500 corsol. All products are sold at the split-off point: barlon sells for $15 per unit, selene sells for $20 per unit, plicene sells for $26 per unit, and corsol sells for $35 per unit.

Barlon 1.0

Selene 2.0

Plicene 1.5

Corsol 2.5

Allocate the joint costs using the weighted average method.