a. A buffer solution contains 0.274 M NH₄Br and 0.379 M NH₃ (ammonia). Determine the pH change when 0.103 mol HBr is added to 1.00 L of the buffer.
pH after addition − pH before addition = pH change =

b. A buffer solution contains 0.432 M NaH₂PO₄ and 0.209 M K₂HPO₄. Determine the pH change when 0.113 mol KOH is added to 1.00 L of the buffer.
pH after addition − pH before addition = pH change =

Consider each of the following independent and material situations. In each case: • the balance date is 30 June 2020. • the fieldwork was completed on 25 August 2020. • the financial report and audit report were signed on 28 August 2020. • the financial report and audit report were mailed to the members on 1 September 2020. (i) Your client, Central Mining, owns a mineral exploration licence in Central Australia. At 30 June 2020 this licence was valued by an independent expert at $50,000,000. This valuation is reflected in the financial report. On 8 September 2020 Central Mining received notice that a claim was being lodged under the Native Titles Act for land which included that subject to the exploration licence. If the claim is successful the exploration licence will be worthless. (ii) Your client, Bird Pty Limited, derives approximately 10% of revenues from selling aviary supplies to city-based bird breeders. A draft copy of a government report, leaked to the press and reported in the media on 11 September, recommends that strict limits be placed on the number of birds that are allowed to be kept in suburban areas. Bird Pty Limited estimates that if the recommendations are enacted, about 70% of its customers will have to cut their flocks by 50% or more. This would affect not only future sales but also their ability to pay existing debts. No further information, other than the draft report, is available as at 15 September. (iii) Your client, Gem Pty Limited, made an out of court settlement on 1 August 2020 of $300,000. The settlement related to a litigation case dating back 4 years. A provision of $150,000 was recorded in the 30 June 2020 financial report. Ans; Since the settlement was done before the closing the Financial Statements so balance of $150000 (300000-150000) should be provided in the current year Financials. (iv) On 14 September 20X7, you discover that a debtor of your client, Galaxy Ltd, was placed in provisional liquidation on 8 September. The debtor owed $600,000 as at 30 June 2020; at this date the amount had been considered collectable by the company. (v) A flood occurred in the warehouse of your client SuperSpring Ltd on 21 September 2020. Inventory valued at $2m was destroyed. The directors believe only half of this value will be recovered from the insurers. Required: For each of the above events (i) to (v), state the appropriate action that the auditor would need to carry out in order to find out about the above and what the company would need to do for each of the above

what is your evaluation of sirius xm's finanancial performance from 2010 to 2013?

q1. give an introduction and conclusion about

Germany economy from 1980 to 2010

Why did the Dodd-Frank Act (2010) not successfully regulate the financial sector?

. Business owners often rely on experts in search engine optimization to increase the number of people who visit the business website. A study was conducted of 7 comparable small businesses before and after implementing a plan for search engine optimization. The number of visitors per day for each business, based on the day before and after implementing the plan, is shown.

(a) Explain the requirements that the data must meet to conduct the hypothesis test described in (b).

(b) Specify the hypotheses for a t-test to see whether the mean number of visitors differs before and after search engine optimization.

(b) Conduct a hypothesis test with a = 0.05, estimating the t-statistic and the p-value.

(c) Report:

the level of significance,

            the type and value of the test statistic (including degrees of freedom if appropriate),

            the p-value (exact values if possible, or a range of possible values), and

            the implications for the null hypothesis.

Do the results indicate that search-engine optimization results in an immediate increase (next day) in the number of visitors to the website?

A study was conducted to investigate whether compliance training affected the productivity of the company’s administrative staff. A random sample of 30 administrative staff underwent compliance training. Download and open the Accounts.xlsx file in Excel. This file contains the number of accounts processed by each staff member both in the week before compliance training and again in the week after compliance training.

Use Excel to carry out a suitable test to address the following research question: Is there a difference between the average number of accounts processed by administrative staff before and after compliance training?

1. (1 mark) The most appropriate test for these data is AnswerA two-sample t-testA paired t-test

2. (1 mark) Referring to the histograms provided, to check the assumption(s) for this test we would use AnswerThe number of accounts processed the week before compliance training (Graph A)The number of accounts processed the week after compliance training (Graph B)The number of accounts processed the week before compliance training and the week after compliance training (Graphs A and B)Differences between the numbers of accounts processed the week before and the week after compliance training (Graph C)None of the other answers

For the remaining questions you may assume that any relevant assumptions have been met.

3. The absolute value of the test statistic is equal to (type your answer with 3 dp) Answer

4. (1 mark) The degrees of freedom is equal to (type your answer as an integer) Answer

5. (1 mark) The p-value is larger than 0.05 Answertruefalse

6. The test indicates that the number of accounts processed: Answer

the prepaid balance in the prepaid insurance account represent the remaining balance of two year policy purchased in April 2010
trial balance unjusted 31 October 2011
prepaid insurance 9350
the office furniture was purchased in March 1 2010 and has estimated useful life of two years of use it is expected that the furniture will be worthless
office furniture October 31 2011 unjusted trial balance
61440
what are   the adjustments t for this two transactions

How do I do this in excel? The data contains data on monthly mortgage payments for 150 homeowners for year 2010 and year 2015. Note that this is a matched sample.

1. Using the appropriate Excel data analysis tool or formulas, test the hypothesis to determine if mortgage payments have risen from 2010 to 2015. The data is too long. If you can make a small example with random variables. Use α = .05.
2. State hypothesis used for this.