AP Chemistry Algorithmic Question 27

Part A

Magnesium burns in air with a dazzling brilliance to produce magnesium oxide:
2Mg(s)+O2(g)→2MgO(s)
When 5.50 g of magnesium burns, the theoretical yield of magnesium oxide is ________ g.

Part B

If the percent yield for the following reaction is 75.0%, and 40.0 g of NO2 are consumed in the reaction, how many grams of nitric acid, HNO3(aq) are produced?
3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g)

Part C

Balance the chemical equation given below, and calculate the volume of nitrogen monoxide gas produced when 8.00 g of ammonia is reacted with 9.00 g of oxygen at 25°C. The density of nitrogen monoxide at 25°C is 1.23 g/L.
________ NH3(g) + ________ O2(g) →________ NO(g) + ________ H2O(l)

Mary, age 27, annually invests $1,000 in an IRA starting this year through the year of her 35th birthday, and then never makes another contribution. Sara, age 36, annually invests $1,000 in an IRA through the year of her 65th birthday. If both Mary and Sara can earn 8% on their investments, who will have more in her IRA account when she retires at the end of her 65th year AND approximately how much more will she have in her account?

Please show the calculator steps please

a) For the last 3 years, the JCR corporation has averaged annual gross receipts of $27 million. This year, JCR has EBITDA of $6,000,000, and it has incurred $2,100,000 in business interest expense. What can JCR deduct as business interest in the current year?

b) Assume that in the following year, JCR has EBITDA of $7,000,000, and it has incurred $1,500,000 in business interest expense. What can JCR deduct as business interest?

On January 27, 2015, ALFA purchased 900,000 of its own shares of stock in the open market for 34 SR per share. Then on February 18, 2015 sold 400,000 shares for 23 SR per share.

A 27 mL solution of .100 M CH3COOH is titrated with a .220 M KOH solution. Calculate the pH after the following additions of the KOH solution:

a) 0 mL

b) 5 mL

A $16,000 bond redeemable at par on July 27, 2012 is purchased on October 19, 2002. Interest is 6.9% payable semi-annually and the yield is 7.3% compounded semi-annually.

a. What is the cash price?

b. What is the accrued interest?

c. What is the quoted price?

Two point charges are fixed on the y axis: a negative point charge q1 = -27 µC at y1 = +0.20 m and a positive point charge q2 at y2 = +0.30 m. A third point charge q = +8.0 µC is fixed at the origin. The net electrostatic force exerted on the charge q by the other two charges has a magnitude of 19 N and points in the +y direction. Determine the magnitude of q2.

The following data give the percentages of random samples of United Kingdom citizens who were smokers, in a variety of years.

  Age (years)

Year 16–19 20–24 25–34 35–49 50–59 60+

1978 34 44 45 45 45 30

1988    28 37 36 36 33 23

1998 31 40 35 30 27 16

2000 29 35 35 29 27 16

2002 25 38 34 28 26 15

2007 20 31 27 22 21 12

(a) Test the hypothesis that the actual percentages of smokers do not depend on the year considered. (b) Test the hypothesis that there is no effect due to age group.

Question 9 (1 point)
Twelve students who were not satisfied with their ACT scores particiapted in an online 10-hour training program. The ACT scores before and after the training for the 12 students are given below:

Student Before After
1 23 27
2 25 26
3 27 31
4 30 32
5 24 26
6 25 24
7 27 31
8 26 28
9 28 30
10 22 25
11 20 24
12 29 32
Test a claim that the program is effective in improving a student’ ACT score.

What is the p-value?

Question 9 options:

Essentially 0

0.0325

0.0478

1.000