Spring Practice Final 2011 Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. The volume of a gas is 400.0 mL when the pressure is 1.00 atm. At the same temperature‚ what is the pressure at which the volume of the gas is 2.0 L? a. | 0.5 atm | c. | 0.20 atm | b. | 5.0 atm | d. | 800 atm | ____ 2. The pressure of a sample of helium is 2.0 atm in a 200-mL container. If the container is compressed to 10 mL without changing
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8. Terfenedine is an amino diol that is the active ingredient in the antihistamine Seldane. Mass spectral analysis of terfenedine shows a molecular ion at m/z = 471 and a peak at m/z = 472 which is 35.5% the height of the molecular ion. Terfenedine is known to contain C‚ H‚ O and N. (a) Suggest five molecular formulas for terfenedine. (b) Terfenedine has an even number of carbons and contains nine double bonds and four rings. Based on this additional information‚ what is the formula for terfenedine
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Measurement in Chemistry Assignment‚ Due 22 March‚ Surname A-D Instructions: All questions must have the correct units and correct number of significant figures. Show all calculations and carry the units throughout. Submit your answers on a new page. Include your name and student number. Q1. Report the number of significant figures in each of the following: a. 0.20 b. 9.05 c. 164300 (1 mark) Q2. Report each of the
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The aim of this experiment it to analyze the solution of Ba(OH)2 of an unknown concentration. In order to obtain the quantitative analysis‚ the exact amount of a particular compound or element present in sample‚ two procedures were performed. The first procedure was by conductimetric titration and by gravimetric determination. The conductivity was analyzed during the reaction between the sulfuric acid (H2SO4) and barium hydroxide (Ba(OH)2). Through the conductivity‚ the equivalence point can be determined;
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1. 2. Qualitative Density 3. 4. Potential energy chemical equation 5. 6. kinetic energy physical properties 7. 8. particulate submicroscopic 9. 10. hypothesis intensive properties 2. The ratio of the mass of an object to its volume 4. A written representation of a chemical reaction‚ showing the reactants and products‚ their physical states‚ and the direction in which the reaction proceeds 6. 1. Nonnumerical experimental
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Bismuth was discovered in the fifteenth century by a french chemist named Claude Geoffroy the Younger. At first his colleagues thought he was crazy‚ thinking that he had found lead or tin. But Geoffroy had distinguished it as a unique element. The name Bismuth comes from the word Wisuth meaning “white mass”‚ because pure Bismuth is white. When pure bismuth is mixed with lead‚ tin‚iron or cadmium the multi colored Bismuth is created. Bismuth falls under the pnictogen family. This family consists
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Since the Grignard reagent can easily react with water‚ all glassware including the 25 ml round bottom flask‚ magnetic stir bar‚ 3 and 5 ml conical vial‚ 50 mL Erlenmeyer flask‚ claisen adapter‚ drying tube and 5 glass pasteur pipets were first added to a 250mL beaker and placed in the oven for 30 minutes. After the completion of the thirty minutes‚ 0.150 g of shiny magnesium turnings and a stir bar was first added to the round bottom flask and the claisen adapter along with the drying tube packed
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Gabriella Posess AP Chemistry- Period C 11/24/11 Iron Complex Lab Purpose: Be able to tell the difference between iron (II) and iron (III) solutions by performing redox reactions between irons oxidation states. Materials: test tube rack 6 test tubes- 25 x150 mm 25 mL graduated cylinder 6 stoppers 6 mL distilled water 6 mL Iron (III) chloride solution (0.02M FeCl3 x 6H2O) 6 mL Iron (II) sulfate solution (0.02M FeSO4 x 7H2O) 1 drop Potassium ferricyanide solution(0.1M K3Fe(CN)6)
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NEGOTIABLE INSTRUMENTS LAW DEFINITIONS: 1) PROMISORY NOTE – It is an unconditional promise in writing made by one person to another‚ signed by the maker‚ engaging to pay on demand‚ or at a fixed or determinable future time‚ a sum certain in money‚ to order or to bearer. (Sec. 184‚ NIL) 2) BILL OF EXCHANGE – It is an unconditional order in writing‚ addressed by one person to another‚ signed by the person giving it‚ requiring the person to whom it is addressed‚ to pay on demand‚ or a fixed or determinable
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www.sakshieducation.com CHEMISTRY IN EVERY DAY LIFE LONG ANSWER QUESTIONS 1. Explain the different classifications of drugs. Classifications of drugs: Drugs are classified in different ways. i) On the basis of drug action: Based on the actions of drugs on particular biochemical processes they are classified as i) Antibacterials iv) Sedatives and tranquilizers ii) Antibiotics v) Cardio vascular drugs iii) Hypnotics vi) Antiseptics etc. ii) On the basis of molecular targets: Biomolecules
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