1) 1.95 moles of HBr in 250.0 mL flask is consumed in 1.00 minutes in the gas phase reaction 2 HBr(g) → H2(g) + Br2(g) at 150°C. The rate of reaction is __________ M∙s-1.
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3.85 |
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0.0650 |
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0.0169 |
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0.260 |
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0.0860 |
2)The reaction A → C is found to be zero order. Which of the following will give a linear plot?
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(A) vs. time |
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ln(A) vs. time |
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1/(A) vs. time |
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None of these will be linear. |
3)Which of the following is not a colligative property?
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depression of solvent vapor pressure upon addition of a solute to a solvent |
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elevation of the boiling point of a solution upon addition of a solute to a solvent |
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depression of the freezing point of a solution upon addition of a solute to a solvent |
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an increase in the osmotic pressure of a solution upon the addition of more solute |
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the increase of reaction rates with increase in temperature |
4)
Yeast and sugar are added to champagne to give the sparkle of carbonation. Under what conditions is carbon dioxide gas most soluble?
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low temperature, high pressure |
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low temperature, low pressure |
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high temperature, low pressure |
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high temperature, high pressure |
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none of these |
5)
In general, the solubility of ________ in water decreases as temperature increases.
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liquids |
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solids |
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gases |
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none of these |
6) In a solution, the solvent is:
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always water |
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the substance in the greatest amount |
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the substance that is dissolved |
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always a gas |
In: Chemistry
A long answer question will require one to three paragraphs
Describe and compare the phenomena of genes that follow polygenic inheritance, multiple alleles, codominance, and incomplete dominance?
In: Biology
Please summarize some information about geography, history, demography, and socio-politico-economic aspects of the Turkey. Please do NOT copy and paste from another source. Please write at least 500 words.
In: Economics
(2) On one day a man who claimed to be Dr. Bun, of NoTrue WallPaper Ltd., the expert wallpaper, persuaded Harry to buy the wallpaper for interior decoration. Harry bought 100 rolls wallpaper for HK$50,000 for Susan's apartment. He signed a written contract without bothering to read it. The contract said that NoTrue WallPaper Ltd. would have no liability for any defect in the wallpaper. When Harry used the wallpaper, they are wet and cannot put onto the wall. Harry goes back to NoTrue WallPaper Ltd., but it is already shut down. Harry immediately reported to the police and Consumer Council, but he was told that the man who had sold wallpaper to Harry was a rogue pretending to be Dr. Bun. Advice Harry of his legal position.
(3) Harry completes the first stage of the contracted design work. In reliance on the agreed design, Susan is planning to purchase a European L-shaped sofa made in Spain from iFurniture, a furniture company, for HK$25,000. Susan just see the sofa set from iFurniture's catalogue, she says that she would very much like to view the real sofa but that she is out of town on a five-day business trip and will not be able to view it until she returns. The boss of iFurniture, Lucas says that if another buyer comes forward, he will have to sell the sofa to that buyer. Susan says she will pay HK$2,500 if iFurniture promises not to sell the sofa to another buyer for the next five days. Lucas agrees to this. Analyse whether any contract has been made between the parties and, if so, what are its terms? Refer to the relevant case law to support your answer.
(4) Harry completes the contracted design work, but Susan only pays HKS300,000, instead of the HKS500,000 originally agreed. Advise Harry of his legal position.
In: Accounting
In: Economics
Consider the two (excess return) index-model regression results for stocks A and B. The risk-free rate over the period was 5%, and the market’s average return was 13%. Performance is measured using an index model regression on excess returns. Stock A Stock B Index model regression estimates 1% + 1.2(rM − rf) 2% + 0.8(rM − rf) R-square 0.605 0.451 Residual standard deviation, σ(e) 10.8% 19.6% Standard deviation of excess returns 22.1% 25.9% a. Calculate the following statistics for each stock: (Round your answers to 4 decimal places.) b. Which stock is the best choice under the following circumstances?
In: Finance
1.WHICH OF THE FOLLOWING IS NOT ONE OF THE FUNDAMENTAL QUESTIONS THAT SHOULD BE ASKED WHEN PLANNING AND CARRYING OUT ACTIVITIES IN A DEVELOPMENTALLY APPROPRIATE CLASSROOM?
A. Is it what the children want at the time of instruction?
B. Is it individually appropriate?
C. Is it socially and culturally appropriate?
D. Is it age appropriate?
2.Which of the following early childhood theorists developed the theory of learning intelligence as it pertains to individual learning styles?
A. Erik Erikson
B. Jean Piaget
C. Maria Montessori
D. Howard Gardner
3. Practice or pre-exercise theories of play pose the idea that
A. play provides children with an opportunity to practice adult activities.
B. play is necessary to reenergize human cognition.
C. children have too much energy and play will rid them of that energy.
D. children are the link between animals and human beings.
4. Direct instruction takes place when
A. Children explore their surroundings and learn based on their own curiosity and interests.
B. Learning takes place through a process of solving a specific problem.
C. The teacher shows children how something works or how to complete an activity.
D. A skill set is explicitly taught or an activity is completed.
5.Which of the following learning styles describes children who have highly developed auditory skills and the ability to use words effectively?
A. Interpersonal
B. Musical
C. Visual=spatial
D. linguistic
6. Exploratory play is best described as
A. the teacher guiding students through a process of discovery
that leads to purposeful learning.
B. children being given the time necessary to explore their
surroundings, learning based on their own curiosity and
interests.
C. learning that takes place through a process of solving a
specific problem.
D. the teacher showing children how something works or how to
complete a portion of or the entire activity.
In: Physics
• Explain why it is important to preserve genetic diversity as well as species diversity.
In: Biology
1. a good rule of thumb when presenting data with a graph is to
a. label all items
b. make sure your graph communicates only one idea
c. limit the number of words
d. all of the above
2. in a normal distribution with a mean of 100 and a standard deviation of 15. what is the probability that a score will be 85 or lower?
3. which of the following sets of scores has the least variability?
a. 7,10,11,15,19
b. 7,7,8,8,10,11
c. 6,6,7,7,7,7
d. 7,7,7,7,7,7
4. which of the following correlations would be interpreted as a very weak relationship?
a. -0.35
b. -0.83
c. 0.15
d. 0.75
5. In the following data set, what is the mode? Dataset (n=5): 6,4,1,3,6
a. 3
b. 6
c. 4
d. 1
6. in a well-designed study, it is possible to generalize your results from the study sample to population
T/F
7. All statistically significant results are meaningful
T/F
8. in the field of health administration, statistics is used for:
a.conducting research
b. guiding policy changes
c. measuring performance
d. all of the above
In: Math
Explain why an antimicrobial substance would be more effective on bacteria and not on viruses?
In: Biology
DNA synthesis
Migration of centrosomes to opposite poles
attachment to kinetochore microtubules to chromosome
a change in cylinder concentration during G1
all the above
cytokinesis
anaphase
5 phase
metaphase
A cell within a pea plant has 12 chromosomes at the end of mitotic division. How many chromosomes would there be if this cell enter G2 in a new round of the cell cycle
a. 6
b. 12
c. 24
d. 48
e. None of the above
Which of the following events occurs during interphase of the mitotic cell cycle?
a. duplication of centrosomes
b. a change in cell size
c. polymerization of microtubules associated with the mitotic spindle
d. breakdown of the nuclear envelope
e. there is more than one correct choice provided
Under normal conditions, somatic cells are always diploid and gametes are always haploid
True
False
In: Biology
2. Income statement
The income statement, also known as the profit and loss (P&L) statement, provides a snapshot of the financial performance of a company during a specified period of time. It reports a firm’s gross income, expenses, net income, and the income that is available for distribution to its preferred and common shareholders.
The income statement is prepared using the generally accepted accounting principles (GAAP) that match the firm’s revenues and expenses to the period in which they were incurred, not necessarily when cash was received or paid. Investors and analysts use the information given in the income statement and other financial statements and reports to evaluate the company’s financial performance and condition.
Consider the following scenario:
Green Caterpillar Garden Supplies Inc.’s income statement reports data for its first year of operation. The firm’s CEO would like sales to increase by 25% next year.
| 1. | Green Caterpillar is able to achieve this level of increased sales, but its interest costs increase from 10% to 15% of earnings before interest and taxes (EBIT). |
| 2. | The company’s operating costs (excluding depreciation and amortization) remain at 80% of net sales, and its depreciation and amortization expenses remain constant from year to year. |
| 3. | The company’s tax rate remains constant at 25% of its pre-tax income or earnings before taxes (EBT). |
| 4. | In Year 2, Green Caterpillar expects to pay $300,000 and $602,438 of preferred and common stock dividends, respectively. |
Complete the Year 2 income statement data for Green Caterpillar, then answer the questions that follow. Be sure to round each dollar value to the nearest whole dollar.
|
Green Caterpillar Garden Supplies Inc. |
||
|---|---|---|
|
Income Statement for Year Ending December 31 |
||
| Year 1 | Year 2 (Forecasted) | |
| Net sales | $10,000,000 | |
| Less: Operating costs, except depreciation and amortization | 8,000,000 | |
| Less: Depreciation and amortization expenses | 400,000 | 400,000 |
| Operating income (or EBIT) | $1,600,000 | |
| Less: Interest expense | 160,000 | |
| Pre-tax income (or EBT) | 1,440,000 | |
| Less: Taxes (25%) | 360,000 | |
| Earnings after taxes | $1,080,000 | |
| Less: Preferred stock dividends | 300,000 | |
| Earnings available to common shareholders | 780,000 | |
| Less: Common stock dividends | 486,000 | |
| Contribution to retained earnings | $294,000 | $436,312 |
Given the results of the previous income statement calculations, complete the following statements:
| • | In Year 2, if Green Caterpillar has 25,000 shares of preferred stock issued and outstanding, then each preferred share should expect to receive _________ in annual dividends. |
| • | If Green Caterpillar has 200,000 shares of common stock issued and outstanding, then the firm’s earnings per share (EPS) is expected to change from _______ in Year 1 to ______in Year 2. |
| • | Green Caterpillar’s earnings before interest, taxes, depreciation and amortization (EBITDA) value changed from ______in Year 1 to ________ in Year 2. |
| • | It is ________ to say that Green Caterpillar’s net inflows and outflows of cash at the end of Years 1 and 2 are equal to the company’s annual contribution to retained earnings, $294,000 and $436,312, respectively. This is because ________of the items reported in the income statement involve payments and receipts of cash. |
In: Accounting
Genetic change in bacteria can be brought about by
conjugation
transduction.
vertical gene transfer.
All of the answers are correct.
In: Biology
The world comprises two countries, A and B. There is only one good, whose price is normalized to 1; hence nominal and real measures coincide. These two countries differ with respect to their production technology. In particular, ???? = 10 − 0.8?? and ???? = 7 − 0.7??, where ???? denotes the marginal product of capital and ?? the capital stock in country i = Α, Β. The total capital stock in the world is 10 units.
a) The initial allocation of capital is ?? = 5 and ?? = 5. Find each country’s total income as well as labor and capital income. What is the world income? [Mark: 0.75]
b) Next, consider the case where there is free capital mobility. Find the capital allocation between the two countries, each country’s total income, as well as labor and capital income. What happens to world income? Explain your answers. [Mark: 0.75]
c) Assume now that, succumbing to domestic pressure, the government of country A imposes a 30% tax on capital income. Show graphically the equilibria before and after taxation. Find the new capital allocation between the two countries, total income, tax revenue, as well as labor and net capital income in each country. Explain your answers. [Mark: 1.5] Note: Round your answers to the second decimal point.
In: Economics
Discuss the three types of communication in IPv4 network
In: Computer Science