Aluminum 2.70 Gold 19.3 1. An object has a mass of 57.7 g and occupies a volume of 21.65 cm3‚ what is its density? 2. An object whose density is 1.98 x 103 kg/m3 has a mass of 35.4 g. How many cubic centimeters does the object occupy? 3. A cylinder has a radius of 12.0 cm. It has a density of 15.2 g/cm3 and a mass of 100 g. What is the height of the cylinder? (Hint: volume of a cylinder can be calculated by r2h) 4. A friend shows you a gift
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Previous exam questions on area between functions and volumes of solids. 1. Let f(x) = cos(x2) and g(x) = ex‚ for –1.5 ≤ x ≤ 0.5. Find the area of the region enclosed by the graphs of f and g. (Total 6 marks) 2. Let f(x) = Aekx + 3. Part of the graph of f is shown below. The y-intercept is at (0‚ 13). (a) Show that A =10. (2) (b) Given that f(15) = 3.49 (correct to 3 significant figures)‚ find the value of k. (3) (c) (i) Using your value of k‚ find f′(x). (ii) Hence
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ORO CITY GAS ABSORPTION COLUMN - MASS TRANSFER EXPERIMENT B ChE 35 Chemical Engineering Laboratory II Acabo‚ Dean Cris Aguirre‚ Ian Carlo Belarmino‚ Arniel Catan‚ Charles John Engr. Marco Theodore E. Escaňo ChE 35 Instructor October 2012 OBJECTIVE: To calculate rate of absorption of carbon dioxide into water from analysis of liquid solutions flowing down the absorption column. THEORETICAL BACKGROUND: Absorption refers to the transfer of a gaseous component from the gas phase to a
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Inch(in) | Yard(yd) | Stirring rod: Length | 300.50cm | 3.005m | 12in | 0.33yd | Lab. Manual: Length | 271cm | 2.71m | 10.20in | 0.28yd | Lab. Manual: Width | 208cm | 2.08m | 8.60in | 0.24yd | B. Graduated Cylinder Volume reading when graduated cylinder is half filled with | (mL) | Potassium permanganate(KMnO4) | 12.6mL | Distilled Water (H2O) | 12.3mL | | Capacity of Apparatus (maximum volume contained) | Big test tube | 18.8mL | 250-mL Beaker | 50mL | C. Pipette
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Assignment No: 02 Traffic Volume Study Acknowledgement I would like to express my profound gratitude and sincere thanks to the supervisor Ashfia Siddique‚ Lecturer‚ Department of civil engineering‚ Ahsanullah University of science and technology for her guidance and valuable suggestions to analyze data in light of practical experience throughout the period of study. INDEX |Topics |Page No
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Write the balanced equation for the reaction conducted in this lab‚ including appropriate phase symbols. Mg(s) + 2HCl(aq) --> H2(g) + MgCl2(aq) 2. Determine the partial pressure of the hydrogen gas collected in the gas collection tube. The partial pressure of the hydrogen gas is 1.07 atm 3. Calculate the moles of hydrogen gas collected. pv=mrt ; n= .0013mol of hydrogen gas 4. If magnesium was the limiting reactant in this lab‚ calculate the theoretical yield of the gaseous product. Show all
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a piston‚ the initial volume being 0.05 m3. Calculate the work done by the fluid when it expands reversibly: a. at constant pressure to a final volume of 0.2 m3; b. according to a linear law to a final volume of 0.2 m3 and a final pressure of 2 bar; c. according to a law Pv = constant to a final volume of 0.1 m3; d. according to a law Pv3 = constant to a final volume of 0.06 m3; e. according to a law‚ P = (A/v2) – (B/v)‚ to a final volume of 0.1 m3 and a final pressure
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Molecular formula CH4 Molar mass 16.04 g mol−1 Appearance Colorless gas Odor Odorless Density 0.6556 g L−1 Melting point -182 °C‚ 90.7 K‚ -296 °F Boiling point -164--160 °C‚ 109-113 K‚ -263--256 °F Solubility in water 22.7 mg L−1 log P 1.09 kH 14 nmol Pa−1 kg−1 Structure Molecular shape Tetrahedron Dipole moment 0 D Thermochemistry Std enthalpy of formation ΔfHo298 −74.87 kJ mol−1 Std enthalpy of combustion ΔcHo298 −891.1–−890.3 kJ mol−1 Standard molar entropy So298 186.25 J
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Gas analysis techniques Terms for gas analysis techniques Concentration The term concentration describes the amount of a substance‚ expressed as mass‚ volume‚ or number of particles in a unit volume of a solid‚ liquid‚ or gaseous substance e.g. alcohol in beer or oxygen in air. Different units are in use to describe concentration in gases: Mass concentration Concentration expressed in terms of mass of substance per unit volume [g substance/m3 gas volume] ¢ Volume concentration Concentration
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PART A It is hypothesised the strongest method for curing eye defect is Gas permeable contact lenses (GP lenses). These lenses are able to maintain their shape instead of adapting to the shape of the cornea due to its firm oxygen permeable material. The lenses can provide improved vision‚ deposit resistance and are inexpensive as they are long lasting. PART B Myopia and Hyperopia are both conditions caused by refractive errors in the eye and possess an array of symptoms PART C Vision is able to
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