Pathophysiology 3 PDF

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Which should be classified as a heterogeneous mixture? a. salsa b. salt water c. table salt, NaCl d. a and b e. all of the above A A piece of lead floats when it is dropped into a pool of mercury. This means that a. the density of lead is less than one. b. the density of Pb is less than the specific gravity of Pb. c. the density of mercury is greater than the density of lead. d. the atomic weight of lead is less than the atomic weight of mercury. e. the specific gravity of lead is greater than the specific gravity of mercury. C A liquid sample has a density of 1.3 g/mL. What is the volume occupied by 10. g of this liquid? a. 7.7 mL b. 10. mL c. 13 mL d. 0.077 mL e. 1.3 × 10-2 mL A The density of a solution is 1.293 g/mL. What is the mass of 3.0 mL of this solution (with proper attention to correct significant digits)? a. 0.43 g b. 4.0 g c. 3.9 g d. 3.879 g e. 2.3 g C What is the density if 58.41 g of a metal occupies a volume of 9.0 cubic centimeters? Make sure your answer has the correct number of significant figures. a. 6.49 g/mL b. 6.5 g/mL c. 7 g/mL d. 0.154 g/mL e. 0.15 g/mL B The densities of ethylene glycol, water and wood alcohol are 1.11 g/mL, 1.00 g/mL and 0.79 g/mL respectively. Suppose an object floats in water and ethylene glycol but sinks when placed in wood alcohol. Which of the following could be the density of the object? a. 1.22 g/mL b. 1.11 g/mL c. 1.05 g/mL d. 0.92 g/mL e. 0.75 g/mL D

What is the mass of 2.00 in3 of mercury? Note: The density of mercury is 13.6 g/cm3. a. 2.67 g b. 27.2 g c. 69.1 g d. 223 g e. 446 g E The density of air is 1.185 × 105 cg/kL. Express this density in mg/L. a. 1.185 × 10-5 mg/L b. 1.185 × 10-3 mg/L c. 1.185 × 10-2 mg/L d. 1.185 mg/L e. 1185 mg/L E What temperature change results if 10.0 g of iron absorbs 50.0 calories? Note: CFe = 0.106 cal/g⋅°C. a. 47.2°C b. 0.530°C c. 0.0212°C d. 1.89°C e. 53.0°C A How much heat (in kcal) is released when 125 g of water cools from 90.0oC to 9.5oC? (Note: the specific heat value for water is 1.00 cal/g⋅°C.) a. 0.644 kcal b. 1.55 kcal c. 12.5 kcal d. 2.44 kcal e. 10.1 kcal E Suppose an equal amount of heat is absorbed by different masses of each of the following metals and you discover that the temperature of the magnesium sample changes the most. Which of the following could be a correct statement of the relative masses of the metal samples studied? Au: 0.031 cal/g⋅°C Fe: 0.106 cal/g⋅°C Mg: 0.245 cal/g⋅°C a. mass Mg > mass Au > mass Fe b. mass Mg > mass Fe > mass Au c. mass Au > mass Fe > mass Mg d. mass Au > mass Mg > mass Fe e. mass Fe > mass Mg > mass Au C How many micrograms are in a kilogram? a. 109 b. 10-9 c. 10-6 d. 106 e. 103 A

Which of the following is equivalent to 75.0 grams? a. 7500 mg b. 0.0750 mg c. 7.50 × 10-4 mg d. 7.50 × 104 mg e. 7.50 × 107 mg D Convert 3.5 liters to milliliters. a. 3.5 × 10-3 mL b. 3.5×103mL c. 3.5×106mL d. 350000 mL e. 0.00350 mL B Convert 6.0 pints to nanoliters. (Note: 1 pint = 0.473 L) a. 2.8 × 10-9 nL b. 2.8×109nL c. 7.1×108nL d. 1.3×108nL e. 1.3 × 10-8 nL B Which of the following is equivalent to the volume of a cube that is 100 cm on each side? Note: The volume of a cube is length × width × height. a. 1 kiloliter b. 1 megaliter c. 102 centiliters d. 106 microliters e. 109 milliliters A Convert 5.0 × 10-8 cm to units of Å. Note that 1 Å is exactly 10-10 m. a. 0.50 Å b. 5.0 Å c. 50 Å d. 5.0×10-2Å e. 5.0×101Å B An extra-strength aspirin tablet contains 0.500 grams of aspirin. How many grains is this? Note: 1 grain = 64.8 mg a. 3.24 × 104 grains b. 65.3 grains c. 32.4 grains d. 13.0 grains e. 7.72 grains E...