2) Which of the following isotope symbols can-'t be 1354 Xe 5426 Fe 3).docx

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This document contains 10 chemistry problems testing knowledge of isotope symbols, atomic structure, chemical formulas and naming compounds. It asks the student to identify incorrect isotope symbols, provide atomic structure information for given elements, write and name ionic compounds and molecular compounds, and write chemical formulas from given compound names or component ions.

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2) Which of the following isotope symbols can't be 1354 Xe 5426 Fe 3) How many protons and
neutrons are in the nucleus correct 14 73 Ge2 23 of the following atoms? 27 A 32 S64 Zn 207 Pb
4) Correct the error in each of the following statements (a) The formula of ammonia is NH3 (b)
Molecules of potassium chloride have the formula KCI (c) Cl is a cation (d) CH4 is a polyatomic
ion. 5) What is the identifty of the element X in the following ions? (a) X2*, a cation that has 36
elctrons (b) X, an anion that has 36 electrons 6) Write formulas for the following compounds (a)
Calcium acetate (b) Iron(IIcyanide (c) Sodium dichromate Chromium(III)sulfate
Mercury(IIperchlor ate 7) Name the following binary molecular compounds: CCL4 CIO2
N20N2O3 8) What are the formulas of the compounds formed from the following ions Nat and
NO K and SO4 Sr and Cl 9) Write formulas for compounds of rubidium with each of the
following: Bromine Nitrogen selenium 10) Write formulas for each of the following compounds
Sodium peroxide bromide Aluminum Chromium (III)sulfate
Solution
2. 23
72
Ge , 2
1
He are in correct
3.
Nuclide 13
27
Al 16
32
S 30
64
Zn 82
207
Pb
protons 13 16 30 82
neutrons 14 16 34 125
4.a. The molecular formule of ammonia is NH3
b. The formula unit of potassium chloride is KCl
c. Cl^- is a anion
d. CH4 is a polyatomic molecule
5. a. Sr --------> Sr^2+
38 36e^-

X is Sr
b. Br + e^- -----------> Br^-
35 e^- 36e^-
X is Br
6.
a. calcium acetate Ca(CH3COO)2
b. iron(II) cynide Fe(CN)2
c. sodium dichromate Na2C2rO7
d. chromium sulfate Cr2(SO4)3
e. mercury(II) perchlorate Hg(ClO4)2
7.CCl4 carbon tetrachloride
ClO2 chloride dioxide
N2O nitrous oxide
N2O3 dinitrogen trioxide
8. NaNO3
K2So4
SrCl2
9. RbBr2
Rb2N3
RbSe
10. sodium peroxide Na2O2
Aluminum bromide AlBr3
Chromium (III) sulfate Cr2(SO4)3

2) Which of the following isotope symbols can-'t be 1354 Xe 5426 Fe 3).docx

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4) What is the Reynolds number? Give an equation but also an explanation of what is being compared. Give two situations where the Reynolds number is used Solution The Reynolds number (Re) is a dimensionless number related to fluid mechanics. It is among the most important attributes used for summarizing the forces acting on a fluid and, based on its value, the turbulence or lack of turbulence of a fluid is determined. The designation is named for Osborne Reynolds, who made many pioneering studies in fluid mechanics in the late 19th and early 20th centuries. The variations in the quantity are laid out on the X-axis of the Moody Chart, one of the more useful graphs in fluid mechanics. More specifically, the Reynolds number is defined as the ratio of inertial forces, which contribute to turbulence, to viscous forces, which act against turbulence, within a fluid. Put another way, the number describes how likely flow is to be laminar or turbulent for a given set of physical conditions. Laminar, or smooth, flow indicates that everything in the flow of a fluid is moving in the same direction and these internal flows do not affect one another. Turbulent flow, on the other hand, indicates that disruptions or eddies are created within the main flow. The most common example of laminar and turbulent flow can be found at a sink. When the water is first turned on and is not flowing very fast, it is clear. Most of the internal flows of the water do not interact with one another and move in the same direction; this is laminar flow and indicates a low Reynolds number. As the amount and speed of the water increases, it turns white. The internal flows begin to collide with one another in a turbulent flow, introducing air into the water stream. Another example of the concept is to imagine an object moving through a fluid. The faster the object moves, the denser the liquid, and the more time the object moves, the more likely the fluid flow is to be turbulent. The more viscous or sticky a fluid is, the greater the chance the fluid .

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3. After water vapor, CO2 is the next most important atmospheric trace gas which has both natural and anthropogenic sources. a.) What are the dominant natural and anthropogenic sources of CO2? b.) What is the current level of CO2 in the atmosphere (in ppmV and in % vol)? c.) What is the average annual rate of the CO2 increase? Also, why does the atmospheric CO2concentration show a seasonal variability? Solution Answer : 3. (a) There are two primary sources of CO 2 : (i) Natural CO 2 sources : These sources include animal and plant respiration, decomposition of organic matter, forest fire and emissions from volcanic eruption. (ii) Anthropogenic (man-made) CO 2 sources : These sources are those produced from power generation, transportation, industrial sources, chemical production, petroleum production and agricultural practices. (b) Current level of CO 2 in atmosphere = 0.041% by volume of the atmosphere = 410 ppmV (Source : National Oceanic and Atmospheric Administration) (c) Annual rate of CO 2 = 3 ppm (Source : National Oceanic and Atmospheric Administration) Seasonal variability in atmospheric CO 2 concentration : Levels of carbon dioxide in the atmosphere rise and fall each year as plants, through photosynthesis and respiration, take up the gas in spring and summer, and release it in fall and winter. The respiration of plants is not evenly distributed through seasons since the northern and southern hemisphere have a different amount of land and plants. The southern hemisphere has far less land. In the northern winter, the carbon released increases and then by May the northern hemisphere has enough carbon uptake (due to increased photosynthesis) to cause a dip in the CO 2 record. Then summer in the north ends and autumn commences, and net CO 2 starts to rise again. .

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2014 Health Savings Accounts (HSA) Exam - Scenario 4: Carlos and Julie Martin Interview Notes Carlos, age 45, and Julie, age 41, are married and will file a joint return. They have two children, Andrea and Roberto, whom they will claim as dependents on their joint return. Julie\'s cousin, Sergio (age 32), came to live with them in August 2014. Sergio\'s gross income was $4,000. Julie and Carlos did not provide over one-half of Sergio\'s support for the year but did pay $700 of Sergio\'s medical bills in October 2014. Carlos was enrolled all of 2014 in an HDHP with family coverage. Carlos has had an HSA for five years. He has no other health insurance and is not eligible for Medicare. In 2014, Carlos made regular contributions to his HSA totaling $3,000. In 2014, Carlos took $1,500 from his HSA to pay the following medical expenses: $200 for over-the-counter allergy medicine for their daughter, Andrea (no prescription from doctor) $375 for Roberto\'s physical therapy sessions. $300 to purchase Julie\'s contact lenses (needed for medical reasons) $625 for long-term care insurance for Carlos Carlos, Julie, Andrea, Roberto, and cousin Sergio are all U.S. citizens and have valid social security numbers. 11. On his Form 8889, Carlos can include the $375 paid for Roberto Solution Answer: True .

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2014 2013 LINK TO TEXT LINK TO TEXT Solution Net Income Net Income = Ending Retained Earnings + Stock Dividend + Cash Dividendâ€“ Beginning Retained Earnings = 301,770 +10,790 +15,010 -263,710 = 63,860 Outflows or inflows Common stock = Ending common stock â€“Beginning common stock â€“ Stock dividend = 167,740 -144,590 -10,790 = 12,360 inflow Dividend = 15,010 outflow Classification in the cash flow statement Common stock = Financing activity Dividends = Financing activity .

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2. There are 3 mechanisms of heat transfer and all are important in ma intaining normal body temperature. Give a good definition of each transfer method and explain how it is related to temperature regulation in mammals. Solution There are three mechanisms by which heat (energy) is transferred.They are - Conduction - Convection - Radiation Conduction: Heat transfer through molecular motion.By conduction ,the transfer of energy from matter to adjacent matter by direct contact, without intermixing or flow of any material. Convection: Transfer of heat through mass movement of a substance.By convection ,the transfer of energy by the bulk mixing of clumps of material. In natural convection, it is the difference in density of hot and cold fluid which causes the mixing. Radiation: The transfer of heat through electromagnetic waves.By radiation such as light, infrared, ultraviolet and radio waves which emanate from a hot body and are absorbed by a cooler body. Temperature regulation in mammals: Humans and other mammals are homeothermic, able to maintain a relatively constant body temperature despite widely ranging environmental temperatures. Conduction, Convection and Radiation can cause both heat loss and heat gain to the body, Evaporation is a mechanism of heat loss only, in which a liquid is converted to a gas. Perspiration evaporating off the skin is an example of this heat loss mechanism. When the body is too hot, it decreases heat production and increases heat loss. One way of increasing heat loss is through peripheral vasodilation, the dilation of blood vessels in the skin. When these vessels dilate, large quantities of warmed blood from the core of the body are carried to the skin, where heat loss may occur via radiation, convection, and conduction. Evaporation of fluids from the body also causes heat loss. Humans constantly lose fluids from the skin and in exhaled air. The unconscious loss of fluid is called insensible perspiration. .

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2.Â Â Â Marvin Services Corporation had the following accounts and balances: Accounts payable $12,000 Equipment $14,000 Accounts receivable 2,000 Land 14,000 Buildings 34,000 Unearned service revenue 4,000 Cash 6,000 Total stockholders\' equity ? Calculate the total of liabilities and stockholders\' equity. Solution Total Asset = Accounts receivable + Buildings + Cash + Equipment + Land Total Asset = 2000 + 34000 + 6000 + 14000 + 14000 Total Asset = $ 70000 Current Liabilty = Accounts payable + Unearned service revenue Current Liabilty = 12000 + 4000 Current Liabilty = 16000 Total of liabilities and stockholders\' equity = Total Asset Total of liabilities and stockholders\' equity = $ 70000 Total of Long term liabilities and stockholders\' equity = Total Asset - Current Liabilty Total of Long term liabilities and stockholders\' equity = 70000- 16000 Total of Long term liabilities and stockholders\' equity = $ 54000 .

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2. The following are types of organisms: A. bacteria; B. fungi; C. algae; D. macrophyte (plants) E. Protozoa; F. Multi-cellular animals a) Complete the table with the corresponding organisms responsible for each function. You may use more than one choice per function. (12) Function Photosynthesis Treating wastewater Anaerobic digestion Mold Type of organisms b) The Tempe Town Lake, like a lot of water bodies (e.g. Lake Erie), has green water. What causes the color? What are the nutrients (elements) behind this phenomenon? (8) Solution Answer 2, (a) Photosynthesis - Macrophyte( plants) , Algae Treating waste water - Bacteria Anerobic digestion - Fungi, protozoa Mold - Fungi b) Lake color can tell you many things about the water body (e.g., including nutrient load, algal growth, and water quality) and also about the surrounding landscape.Green water lakes commonly have high concentrations of chlorophyll-containing algae which can give water a green color. That is Algae which gets formed on stagnant water. Algae needs nutrients, sunlight and water to form. A high concentration of Algae indicates water is rich in nutrients primarily phosphorus. Green lakes are often eutrophic and typically contain more harmful algal blooms than other types of lakes. Activities such as farming or septic system failure can increase the green color of lakes through nutrient inputs which act as a fertilizer for algae. The high productivity of green lakes usually enables them to support more fish, but the poor water quality conditions can depress dissolved oxygen levels in hot summer months; these conditions can cause fish kills where oxygen drops too low for fish to survive.( Algal overgrowth due to eutrophication - caused by fertilizer runoff from fields and lawns.) Nutrients causing eutrophication The most common nutrients causing eutrophication are nitrogen and phosphorus . The main source of nitrogen pollutants is run-off from agricultural land, whereas most phosphorus pollution comes from households and industry, including phosphorus-based detergents. These nutrients enter aquatic ecosystems via the air, surface water or groundwater. Most of the commercially fixed nitrogen and mined phosphorus goes into production of fertilizer. The rising demand for fertilizer has come from the need to meet the nutritional demands of our rapidly expanding human population. .

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2. Accepted $16,700 on February 1, 2014, as a retainer for services to be performed evenly over the next 12 months. On December 31, 2014, recognized the revenue that had been earned for services performed in accordance with Transaction 2. Show the effects of the events on the financial statements using a horizontal statements model like the following one. In the Cash Flow column, use the initials OA to designate operating activity, IA for investing activity, FA for financing activity, NC for net change in cash and NA to indicate accounts not affected by the event. The first event has been recorded as an example. (Do not round intermediate calculations and round your final answers to nearest whole number. Enter any decreases to account balances and cash outflows with a minus sign.) Solution 1.Office supplies on account Assets = Liabilities + Stockholder\'s equity SUPPLIES= ACCOUNT payable 2 . unearned revenue of $16,700 16700 cash = 16,700 unearned revenue + NA 3.$65,000 services recieved 4 salary paid 5.Paid cash dividend 6.$900 accounts paybale paid 7. office supplies in hand $95 which means $905 supplies expended 8. unearned revenue realised .

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