9. The decomposition of N₂O₅is first order with a rate constant of 4.80 x 10^-4 s^-1at 45 ºC. If the initial concentration is

1.65 x 10^-2 M, what is the concentration after 825 s? What is the half life? How long would it take for the concentration of N₂O₅ to decrease to 1.00 x 10^-2 M from its initial value?

10. The following reaction has a K_c = 3.92 at 1200 Kelvin:     CO(g) + 3H₂(g) ⇌ CH₄(g) + H₂O(g)

At equilibrium, the reaction vessel contains 0.30 M CO , 0.10 M H₂ , and 0.020 M H₂O

Write the equilibrium constant expression. What is the [CH₄] at equilibrium? Calculate the K_p (for atm).

answers:

9. 0.0111 M, 24.1 min, 17.4 min

10. K_c = [CH₄][H₂O]         [CH₄] = 0.059 M     K_p = 4.04 x 10^-4

               [CO][H₂]

Madam Bose has been in business for many years as sole trader. His cash at hand on 1^st October, 2018 was N750,000 but there was no bank account.The following transactions took place during the month of October, 2018.

Oct 1   Opened bank account and paid in cash                                              N750,000

Oct 4   Rented premises and paid for 2 months by cheque                            N30,000

Oct 7   Bought furniture and fitting by cheque                                              N90,000

Oct 11 Purchased goods for sale by cheque                                                   N120,000

Oct 14 Cash sales                                                                                            N525,000

Oct 16 Received cheque from Badmus on account of September sales        N123,000

Oct 19 Paid cash into bank                                                                             N190,000

Oct 20 Purchased goods from Gabriel & sons on credit N150,000

Oct 20 Cash sales                                                                                            N111,250

Oct 26 Paid cash into bank                                                                             N111,250

Oct 28 Sold goods on credit to Stephens & co                                              N270,000

Oct 29 Paid Gabriel & sons on account by cheque                                        N75,000

Oct 30 Paid salaries by cash                                                                           N81,550

Oct 30 Paid electricity bill by cheque                                                             N13,500

Oct 31 Paid sundry expenses by cash                                                             N6,000

Required: Prepare the two-column cash book of Madam Bose Enterprises for the month of October 2018.

Travel to the following locations using Google Earth Pro, Google maps or any other mapping software of your choice. Describe the primary landform process in each area and speculate briefly how each area came to look the way it does today! (0.8 marks)

(a) 39º 16’ 53”S 175º 33’ 57”E

(b) 02º46’52”S 60º 40’ 09”W

(c) 37º59’36”N 73º23’01”E

(d) 30º24’08”N 58º16’41”W

Write a short reflection paper (1-2 paragraphs) explaining why having (and enforcing) a code of conduct is important in the accounting career field. Make this a scholarly paper, properly formatted, spell checked, etc. This must be more than a "in my opinion" type of analysis.  

Please write queries based on the following requirements using DML In-Class Data Set. For each question, you are required to submit 1) SQL query code; 2) a screen shot of your query result.You should copy and paste your SQL query code to the word document instead of taking a screenshot of your code. Missing either part for each question will result in 0 for this question.

8.List the warehouse number and the average unit price for warehouses other than number 2.

9.List the stored part information for SG parts stored in warehouse 2 or 3.

10.List the part number and part description for each part with letter D(or d) in the part_description. Rank your results in ascending order on itemclass and then descending order on units_on_hand.

11.List the average unit price among all the parts. Rename the column as AVG_UNIT_PRICE

12.List the part number and part description for each part with nine characters or ten characters in the part_description. Rank your results in ascending order on part number.

13.Find the itemclasses and the number of parts under each class. Only show those classes with at least3 types of parts.

14.List the stored part information for SG parts or parts with more than 60 units stored in warehouse 3.

15.List the number of different part stored in each warehouse, only include those warehouse with at most3parts.

Part 2. Monty Hall problem:

Given below is the description of the problem.

Suppose you're on a game show and you're given the choice of three doors.

Behind one door is a car; behind the others, goats. The car and the goats were placed randomly behind the doors before the show.

The rules are:

After you have chosen a door, the door remains closed for the time being. The game show host, Monty Hall, who knows what is behind the doors, now has to open one of the two remaining doors, and the door he opens must have a goat behind it. If both remaining doors have goats behind them, he chooses one randomly.

After Monty opens a door with a goat, he will ask you to decide whether you want to stay with your first choice or to switch to the last remaining door. Imagine that you chose Door 1 and the host opens Door 3, which has a goat. He then asks you "Do you want to switch to Door Number 2?" Is it to your advantage to change your choice?

NOTES:

1. The player may initially choose any of the three doors (not just Door 1).
2. The host opens a different door revealing a goat (not necessarily Door 3).
3. The host gives the player a second choice between the two remaining unopened doors.

• Write Python code to solve the Monty Hall problem. Simulate at least a thousand games using three doors for each strategy and show the results in such a way as to make it easy to compare the effects of each strategy.

10.13 LAB*: Warm up: Online shopping cart (Part 1)

(1) Create three files to submit:

• ItemToPurchase.h - Class declaration
• ItemToPurchase.cpp - Class definition
• main.cpp - main() function

Build the ItemToPurchase class with the following specifications:

• Default constructor
• Public class functions (mutators & accessors)
• SetName() & GetName() (2 pts)
• SetPrice() & GetPrice() (2 pts)
• SetQuantity() & GetQuantity() (2 pts)
• Private data members
• string itemName - Initialized in default constructor to "none"
• int itemPrice - Initialized in default constructor to 0
• int itemQuantity - Initialized in default constructor to 0

(2) In main(), prompt the user for two items and create two objects of the ItemToPurchase class. Before prompting for the second item, call cin.ignore() to allow the user to input a new string. (2 pts)

Ex:

Item 1
Enter the item name:
Chocolate Chips
Enter the item price:
3
Enter the item quantity:
1

Item 2
Enter the item name:
Bottled Water
Enter the item price:
1
Enter the item quantity:
10

(3) Add the costs of the two items together and output the total cost. (2 pts)

Ex:

TOTAL COST
Chocolate Chips 1 @ $3 = $3
Bottled Water 10 @ $1 = $10

Total: $13

code ---------------------------------------------------------

#include <iostream>
using namespace std;

#include "ItemToPurchase.h"

int main() {

/* Type your code here */

return 0;
}

A piston-cylinder device contains 0.5 m³ air at 100 kPa and 1000 K. Because the outside is cooler (at 300 K), the hot air starts losing heat to the surroundings and the volume of air starts decreasing. Over a certain period of time the volume is observed to shrink by 50%.

The final temperature is lower or higher?

Determine the boundary work transfer (absolute value). in KJ

Two capacitors C₁ = 4.6 ?F, C₂ = 18.6 ?F are charged individually to V₁ = 15.3 V, V₂ = 4.4 V. The two capacitors are then connected together in parallel with the positive plates together and the negative plates together.
Calculate the final potential difference across the plates of the capacitors once they are connected.

Calculate the amount of charge (absolute value) that flows from one capacitor to the other when the capacitors are connected together.

By how much (absolute value) is the total stored energy reduced when the two capacitors are connected?

Q1

In a flowering plant, the eggs are produced by meiosis in the _____ and the male gametophyte is produced by the _____.

A stamen ... stigma

B ovule ... carpel

C ovule ... anther

D stigma ... sepal

Q2

The only difference between monocots and dicots is the number of cotyledons they produce.

True

False

Q3

How is the development of a female gametophyte similar to the development of the egg in a human female.

A they both begin with four cells but end with only one

B they are both necessary for pregnancy and birth

C they both require nine months to develop

D none of the responses are correct

Q4

Plants resemble humans in that they require some essential elements to maintain good health.

True / false

Cabbages are biennial plants that produce a head the first year and a flowering stalk the second. The growth of the stalk called "bolting" involves rapid elongation of an already formed stem. Which of the following substances is likely to be immediately responsible for inducing bolting?

A cytokinin

B gibberellin

C Abscisic acid

D phytochrome

Explain the OSI model with examples of each layer.

Write a C++ program to test if a given array satisfies the constraints of min heap and max heap.

      bool isMinHeap(int arr[],int size);

      bool isMaxHeap(int arr[],int size);

Also write code for this function:-

      int heapPlay(int arr[],int size);

The function returns an integer as follows:-

    1. If the array is a min heap return the minimum element

    2. If the array is a max heap return maximum element

    3. Return 0, if the array is a min heap and a max heap

    4. Return -1, if the array is neither a min heap nor a max heap

Ex.

Input - Contains size on line 1, an array on line 2.

Output - We will test your three methods

Input -

    3

1 2 3

Output -

isMinHeap ->   true

isMaxHeap ->   false

heapPlay ->    1

Sample Input 1:

1
5

Sample Output 1:

1 1 0

Sample Input 2:

3
9 8 7

Sample Output 2:

0 1 9

template:

bool isMinHeap(int arr[],int size)
{
//code here
}

bool isMaxHeap(int arr[],int size)
{
//code here
}

int heapPlay(int arr[],int size)
{
//code here
}

Scenario 4

A warehouse has a new leadership team and they wanted to prove their performance was as good or better than the previous leadership team. They measured on-time shipping and accurate order fulfillment. Their data showed a correlation value of 0.70 and a regression value of 0.49 between on-time shipping and accurate order fulfillment. The previous leadership teams’ corresponding numbers for on-time shipping and accurate order fulfillment were a correlation value of 0.80 and a regression value of 0.64.

1. What conclusions can you summarize from these numbers in plain English?

2. Based on this data what future course of action do you recommend for your client?

Scenario 5

The same warehouse leadership team in Scenario 4 measured damaged products and warehouse capacity. Their data showed a correlation value of -0.50 and a regression value of 0.25 between damaged products and warehouse capacity.

1. What conclusions can you summarize from these numbers in plain English?

2. Based on this data what future course of action do you recommend for your client?

Write a C++ program, tictac.cpp, that repeatedly reads in tic-tac-toe boards and for each one indicates if there is a winner and who won.

The board will be read in as 3x3 array of characters (x, o or . for a blank spot).

You are required to write the following functions to help solve the problem:

// input prompts the user for a board and inputs it

// into the given array

void input (char board [3][3]);

// print prints the board in nice format

void print (char board [3][3]);

How it should look:

Enter your board as characters (x, o or .):

o.x

..o

.x.

The board is:

o |   | x

-----------

   |   | o

-----------

   | x |

No winner!

Would you like to do another (y or n)? y

Enter your board as characters (x, o or .):

oxo

ox.

.xo

The board is:

o | x | o

-----------

o | x |

-----------

   | x | o

X wins!

Would you like to do another (y or n)? y

Enter your board as characters (x, o or .):

xoo

xox

ox.

The board is:

x | o | o

-----------

x | o | x

-----------

o | x |

O wins!

Would you like to do another (y or n)? n

Thanks for playing!

// win returns true if the given player has won on the

// given board, else it returns false

bool win (char board [3][3], char player);

You are required to use nested loops to write the functions input and print.

The back of this page shows a sample run of the program (input in bold). Your output should look at least as nice as that shown. You may assume that the board will be legal and there will be at most one winner.