EXPERIMENT 6 – Empirical Formula of a Compound INTRODUCTION Chemical formulas indicate the composition of compounds. A formula that gives only the simplest ratio of the relative number of atoms in a compound is the empirical formula or simplest formula. The ratio usually consists of small whole numbers. We call a formula that gives the actual numbers of each type of atom in a compound the molecular formula. The numbers in a molecular formula will be whole number multiples of the numbers in an empirical
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costs and maximize firm efficiency. e. maintain steady growth in both sales and net earnings. ( c ) 2. The interest rate expressed as if it were compounded once per year is called the _____ rate. a. stated interest b. compound interest c. effective annual d. periodic interest e. daily interest ( b ) 3. You are comparing two investment options. The cost to invest in either option is the same today. Both options will provide you with $20‚000 of
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Page 1 of 6 SECTION A : ANSWER ALL QUESTIONS ( 5 MARKS EACH ) 1.1 A discount store sold plastic cups for $0.35 each and plastic plates for $0.40 each. If 200 plastic cups and plates were sold for a total of $76‚ how many cups and plates were sold? 1.2 Find the exact interest on a loan of $2000 at 11% annually. The loan was made on February 15 and was due on 25 August in a non-leap year. 1.3 A sofa set was purchased with $500 down payment and 24 payments of $125. i. ii. Find the
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Melissa Benning Introduction The purpose of the coordination complex lab is to determine the absorbance spectra of complexes based on their color. Every complex has its own color which results from the wavelengths of white light it reflects. The complexes will be compared by the color each reflects and by the energy of the waves each absorbs. The purity of the synthesized complex will also be found. Procedure Part I: Preparation of the Complex A sample of copper sulfate pentahydrate (6.285g)
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observed chemical reactions‚ the first step to determine the identity of an unknown is to purify the substance. One technique often used to purify solids is recrystallization from a selected solvent. Because of the variable solubility of different compounds in various solvents and at various temperatures‚ it is possible to remove impurities by dissolving the unknown and then immediately cooling the solvent. The unknown recrystallizes‚ but the impurities remain dissolved in the solvent. It is then
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RESULT: SampleReading | 4A | 4B | 4C | AVERAGE | Weight of crucible (g) | 53.8242 | 60.9377 | 56.7898 | 57.1869 | Weight of crucible+ sample (g) | 56.0800 | 63.0159 | 59.3516 | 59.4825 | Weight of sample (g) | 2.2558 | 2.0782 | 2.5527 | 2.2956 | Weight of crucible + sample after 1 day (g) | 53.8813 | 60.9910 | 56.8657 | 57.2460 | Weight of ash (g) | 2.1987 | 2.0249 | 2.4859 | 2.2365 | Percentage of ash (%) | 2.5313 | 2.5647 | 2.6168 | 2.5709 | CALCULATION: % of ash = weight of sample
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Delimitation of the Study The scope of this study is based on the formulation and application of both chili and kamias extracts to mosquitoes. 6. Definition of Terms Antiscorbutic: a remedy for scurvy Astringent: substance is a chemical compound that tends to shrink or constrict body tissues‚ usually locally after topical medicinal application astringent‚ Pesticide: any chemical substance used for killing pests‚ as insects Stomachic: is one that
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is the key economic principle involved in calculating the present value and future value of multiple cash flows? Regardless of whether you are calculating the present value or the future value of a cash flow stream‚ the key idea is to discount or compound the cash flows to the same point in time. 6.3 What is the difference between a perpetuity and an annuity? A cash flow stream that consists of the same amount being received or paid on a periodic basis is called an annuity. If the same payments
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Chapter 5 Which of the following is the actual rate of interest paid or earned over a year’s time? Wrong Answer: the periodic rate Which of the following has the highest time value of money at the same time interest rate for the same number of payments Correct Answer: the future value or an annuity-due Which of the following would increase the present value of a single cash flow? Wrong Answer: a decrease in the cash flow You invest $1000 at 6% compounded annually and want to know
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A. Compound Interest Formula:FV = P (1 + r) nFuture Value = FV‚ P = Principal‚ r = interest rate and n = number of years. = $500(1 + 0.06) 10a) An initial $500 compounded for 10 years at 6 percent. A = $ 895b) An initial $500 compounded for 10 years at 12 percent. 500(1 + 0.12) 10B = $1553Present Value Calculation:PV = present Value‚ Principal = $ 500‚ r = interest rate and n = number of yearsFormula:PV = FV/(1 + r) nThe present value of $500 due in 10 years at a 6 percent discount rate.
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