Q&A Hero

Q: A slice of pizza contains 29 g of carbohydrate, 13 g of protein and an unknown amount of fat. If the pizza contains 280 kcal, how many grams of fat are present? Report the answer to 2 significant figures. A) 10. g B) 12 g C) 25 g D) 55 g E) 250 g

Q: A serving of fish contains 50.g of protein and 4.0 g of fat. If protein has a caloric value of 4.0 kcal/g and fat has 9.0 kcal/g, how many kcal are in the serving? Report the answer to 2 significant figures. A) 240 kcal B) 54.0 kcal C) 470 kcal D) 220 kcal E) 490 kcal

Q: A cheeseburger from a fast food restaurant contains 19 g of fat, 20. g of carbohydrate, and 28 g of protein. How many kcal of energy does the cheeseburger contain? (The accepted caloric values for foods are 4.0 kcal/g for carbohydrate, 9.0 kcal/g for fat, and 4.0 kcal/g for protein.) Report the answer to 2 significant figures. A) 70. kcal B) 360 kcal C) 17 kcal D) 630 kcal E) 280 kcal

Q: The dietary calorie (Cal) is equal to A) 1000 kilocalories. B) 1000 calories. C) 100 calories. D) 10 calories. E) 1 calorie.

Q: A potato contains 20 g of carbohydrate. If carbohydrate has a caloric value of 4 kcal/g, how many kcal are obtained from the carbohydrate in the potato? A) 5 kcal B) 20 kcal C) 40 kcal D) 60 kcal E) 80 kcal

Q: A 2.5 g sample of french fries is placed in a calorimeter with 500.0 g of water at an initial temperature of 21 C. After combustion of the french fries, the water has a temperature of 48 C. What is the caloric value (kcal/g) of the french fries? A) 14 kcal/g B) 11 kcal/g C) 0.14 kcal/g D) 4.2 kcal/g E) 5.4 kcal/g

Q: Global warming is believed to result from all of the following except A) burning of fossil fuels. B) increasing levels of carbon dioxide in the atmosphere. C) deforestation. D) movement of the Earth closer to the Sun. E) carbon dioxide trapping the heat produced by the Sun.

Q: 3.25 kcal is the same amount of energy as A) 3.25 J. B) 0.777 J. C) 777 J. D) 13600 J. E) 13.6 J.

Q: In which of the following would the particles move most rapidly? A) ice at -20 C B) water at 20 C C) steam at 110 C D) boiling water E) ice at 0 C

Q: The energy of motion is referred to as A) work. B) freezing. C) specific heat. D) potential energy. E) kinetic energy.

Q: The energy stored in the chemical bonds of a carbohydrate molecule is A) specific heat. B) kinetic energy. C) potential energy. D) work. E) a calorie.

Q: The phrase "ability to do work" is a definition of A) specific heat. B) energy. C) calorie. D) heating. E) cooling.

Q: Which of the following is an example of potential energy? A) chewing food B) water stored in a reservoir C) burning wood D) a fan blade turning E) riding an exercise bike

Q: An example of kinetic energy is A) a coiled spring. B) running water. C) a tree. D) natural gas. E) chemical energy.

Q: The energy associated with the motion of particles in a substance is called A) temperature. B) electrical energy. C) heat. D) chemical energy. E) potential energy.

Q: 650. J is the same amount of energy as A) 155 cal. B) 2720 cal. C) 650 cal. D) 1550 cal. E) 2.72 cal.

Q: Absolute zero is A) the freezing point of water using the Celsius scale. B) the boiling point of liquid nitrogen. C) the temperature on the Kelvin scale corresponding to 32 F. D) the coldest temperature possible. E) the freezing point of liquid nitrogen.

Q: On a hot day, the thermometer read 95 F. What is the temperature in degrees Celsius? A) 77 C B) 113 C C) 35 C D) 63 C E) 178 C

Q: The temperature of liquid nitrogen is - 196 C. What is the corresponding reading on the Kelvin scale? A) 77 K B) -127 K C) -91 K D) 48 K E) 146 K

Q: A patient has a temperature of 38.5 C. What is the temperature in degrees Fahrenheit? A) 70.5 F B) 311 F C) 126.9 F D) 101.3 F E) 11.7 F

Q: If the temperature is - 55 C, what is the corresponding temperature on the Kelvin scale? A) 225 K B) 218 K C) 55 K D) 273 K E) 328 K

Q: If the temperature is 20 C, what is the corresponding temperature on the Fahrenheit scale? A) -22 F B) 68 F C) 43 F D) 239 F E) 94 F

Q: A temperature of 41 F is the same as A) 5 C. B) 310 C. C) -9 C. D) 16 C. E) 42 C.

Q: Which of the following is a physical change? A) baking a cake B) dry ice subliming C) fermenting grapes to produce wine D) digesting a meal E) a tomato ripening

Q: Which of the following is a chemical change? A) cutting a rope B) bending a steel rod C) making a snowman D) burning sugar E) melting gold

Q: Which of the following would NOT be a physical change? A) freezing water to make ice cubes B) tearing a piece of aluminum foil C) boiling water for soup D) burning gasoline in a lawnmower E) melting gold to make jewelry

Q: Which of the following is an example of a physical change? A) grinding coffee beans B) baking a cake C) converting water to hydrogen and oxygen D) digesting a cheeseburger E) burning coal

Q: In a gas, the distance between the particles is A) very close relative to the size of the molecules. B) close relative to the size of the molecules. C) fixed relative to the size of the molecules. D) small relative to the size of the molecules. E) very large relative to the size of the molecules.

Q: Which one of the following properties describes a liquid? A) has its own shape B) particles are close together and move randomly C) particles move very rapidly D) fills the entire volume of the container E) There is essentially no interaction between the particles.

Q: Which of the following is a physical property of both liquids and gases? A) has its own shape B) has a definite volume C) has strong interactions between its particles D) has randomly arranged particles E) has large spaces between molecules

Q: Which of the following is a property of a solid? A) It takes the shape of the container. B) It fills the volume of the container. C) The particles move at a rapid rate. D) The interactions between its particles are very weak. E) The particles have fixed positions and are very close together.

Q: The primary substances of which all other things are composed are A) molecules. B) compounds. C) elements. D) electrons. E) protons.

Q: Gold in a wedding ring is a(n) A) compound. B) heterogeneous mixture. C) element. D) homogeneous mixture. E) None of the above.

Q: Coins in a piggy bank is a(n) A) compound. B) heterogeneous mixture. C) element. D) homogeneous mixture. E) None of the above.

Q: Air is a(n) A) compound. B) heterogeneous mixture. C) element. D) homogeneous mixture. E) None of the above.

Q: Helium is a(n) A) compound. B) heterogeneous mixture. C) element. D) homogeneous mixture. E) electron.

Q: Round off each of the following to three significant figures. 1> 504.85 2> 8.3158 3> 25 225 4> 58.5422 5> 6.3477 x 104 6> 399870 7> 0.003 408 8

Q: A 50.0 mL urine sample has a mass of 50.7 g. The specific gravity of the urine is A) 1.014 g/mL. B) 0.986 g/L. C) 1.01. D) 0.986. E) 50.7.

Q: Which of the following is often used to determine an individual's percentage of body fat? A) temperature B) height C) weight loss D) weight gain E) density

Q: The ratio of the mass of a substance to its volume is its A) specific gravity. B) density. C) buoyancy. D) weight. E) conversion factor.

Q: Diamond has a density of 3.52 g/mL. What is the volume in cubic centimeters of a diamond with a mass of 15.1 g? A) 4.3 cm3 B) 4.29 cm3 C) 0.233 cm3 D) 53 cm3 E) 53.2 cm3

Q: The specific gravity of a solution is 1.18. Its density is A) 11.8 g/mL. B) 0.118 g/mL. C) 0.847 g/mL. D) 1.18 g/mL. E) 1.2 g/mL.

Q: The density of a solution is 0.847 g/mL. Its specific gravity is A) 11.8. B) 0.118. C) 0.847. D) 1.18. E) 1.2.

Q: What is the mass of 53 mL of ethanol, which has a density of 0.79 g/mL? A) 67.1 g B) 41.9 g C) 42 g D) 67 g E) 53 g

Q: A liquid has a volume of 34.6 mL and a mass of 46.0 g. What is the density of the liquid? A) 1.00 g/mL B) 1.33 g/mL C) 0.752 g/mL D) 1330 g/mL E) 0.663 g/mL

Q: What is the density of a substance with a mass of 45.00 g and a volume of 26.4 mL? A) 1.70 g/mL B) 1.7 g/mL C) 0.59 g/mL D) 0.587 g/mL E) 45.0 g/mL

Q: Mercury has a specific gravity of 13.6. How many milliliters of mercury have a mass of 0.35 kg? A) 0.0257 mL B) 0.026 mL C) 25.7 mL D) 26 mL E) 4760 mL

Q: What is the mass of 2.00 L of an intravenous glucose solution with a density of 1.15 g/mL? A) 0.023 kg B) 2.30 kg C) 1.15 kg D) 0.015 kg E) 0.58 kg

Q: Which one of the following substances will float in gasoline, which has a density of 0.66 g/mL? A) table salt (density = 2.16 g/mL) B) balsa wood (density = 0.16 g/mL) C) sugar (density = 1.59 g/mL) D) aluminum (density = 2.70 g/mL) E) mercury (density = 13.6 g/mL)

Q: A nugget of gold with a mass of 521 g is added to 50.0 mL of water. The water level rises to a volume of 77.0 mL. What is the density of the gold? A) 10.4 g/mL B) 6.77 g/mL C) 1.00 g/mL D) 0.0518 g/mL E) 19.3 g/mL

Q: A doctor's order is 0.125 g of ampicillin. The liquid suspension on hand contains 250 mg/5.0 mL. How many milliliters of the suspension are required? A) 0.0025 mL B) 3.0 mL C) 2.5 mL D) 6.3 mL E) 0.0063 mL

Q: A dose of aspirin of 5.0 mg per kilogram of body weight has been prescribed to reduce the fever of an infant weighing 8.5 pounds. The number of milligrams of aspirin that should be administered is A) 19 mg. B) 53 mg. C) 1.6 mg. D) 5.0 mg. E) 0.59 mg.

Q: A driver is traveling at 60 km/h. Is the driver speeding if the speed limit is 45 mph? A) Yes B) No

Q: Grapes are $1.49 per pound. What is the cost of 1.20 kg of grapes? A) $3.93 B) $2.73 C) $1.79 D) $0.81 E) $0.56

Q: What is the volume of a cube that measures 4.00 cm on each side? A) 16.0 mL B) 64.0 L C) 64.0 mL D) 64.00 mL E) 0.640 L

Q: 1.00 pint of milk has a volume of how many milliliters? (2 pints = 1 quart) A) 472 mL B) 530. mL C) 1000 mL D) 1890 mL E) 106 mL

Q: What is 6.5 m converted to inches? A) 1700 in B) 1651 in C) 39 in D) 260 in E) 255.9 in

Q: How many liters of soft drink are there in 5.25 qt? A) 4950 L B) 55.7 L C) 4.95 L D) 5.57 L E) 5.0 L

Q: How many kilograms are in 30.4 lb? A) 13.8 kg B) 14 kg C) 67 kg D) 66.88 kg E) 66.9 kg

Q: How many centimeters are there in 57.0 in.? A) 22 cm B) 0.0445 cm C) 145 cm D) 22.4 cm E) 140 cm

Q: How many pounds are in 3.5 kg? A) 7.7 lb B) 1.59 lb C) 0.629 lb D) 1.6 lb E) 7.70 lb

Q: The EPA limit for lead in the soil of play areas is 400 ppm. This is the same as A) 400 mg lead in each gram of soil. B) 400 g lead in each kilogram of soil. C) 400 mg lead in each kilogram of soil. D) 400 g lead in each kilogram of soil. E) 400 g lead in each milligram of soil.

Q: Which of the following setups would convert centimeters to feet? A) cm x x B) cm x x C) cm x x D) cm x x E) cm x x

Q: According to the United States Food and Drug Administration, the recommended daily requirement of protein is 44 g. This is ________ oz of protein. A) 1248.5 B) 320 000 C) 1.6 D) 0.0605 E) 150 000

Q: Which of the following conversion factors is a measured number? A) 10 cm/dm B) 12 in/ft C) 16 oz/lb D) 25 miles/gallon E) 12 eggs/dozen

Q: A conversion factor set up correctly to convert 15 inches to centimeters is A) 100 cm/1 m. B) 1 inch/2.54 cm. C) 1 cm/10 mm. D) 2.54 cm/1 inch. E) 10 cm/1 inch.

Q: What is the conversion factor for the relationship between millimeters and centimeters? A) 1 mm/1 cm B) 10 mm/1 cm C) 1 cm/1 mm D) 100 mm/1 cm E) 10 cm/1 mm

Q: 9.31 g is the same mass asA) 931 g.B) 931 kg.C) 93.1 cg.D) 9310 mg.E) 0.0931 dg.

Q: The cubic centimeter (cm3 or cc) has the same volume as a A) cubic inch. B) cubic liter. C) milliliter. D) centimeter. E) cubic decimeter.

Q: Which of the following is the smallest unit? A) gram B) milligram C) kilogram D) decigram E) microgram

Q: What is the metric relationship between grams and micrograms?A) 1 g = 100 gB) 1 g = 1 000 000 gC) 1 g = 0.000 001 gD) 1 g = 1000 gE) 1 g = 0.001 g

Q: Which of the following is the largest unit? A) millimeter B) micrometer C) meter D) decimeter E) kilometer

Q: In which of the following is the metric unit paired with its correct abbreviation? A) microgram / mg B) milliliter / mL C) centimeter / km D) kilogram / cg E) gram / gm

Q: Which of the following measurements are NOT equivalent? A) 25 mg = 0.025 g B) 183 L = 0.183 kL C) 150. ms = 0.150 s D) 84 cm = 8.4 mm E) 24 dL = 2.4 L

Q: 5.21 cm is the same distance as A) 0.0521 m. B) 52.1 dm. C) 5.21 mm. D) 0.00521 km. E) 5210 m.

Q: What is the correct answer for the calculation ? A) 0.65645 B) 0.656 C) 0.66 D) 1.52 E) 1.5

Q: The correct answer for the addition of 7.5 g + 2.26 g + 1.311 g + 2 g is A) 13.071 g. B) 13 g. C) 13.0 g. D) 10 g. E) 13.1 g.

Q: What is the answer, with the correct number of decimal places, for this problem? 4.392 g + 102.40 g + 2.51 g = A) 109.302 g B) 109 g C) 109.3 g D) 109.30 g E) 110 g

Q: When 2610 + 11.7 + 0.22 are added, the answer to the correct number of decimal places is A) 2621.92. B) 2621.9. C) 2621. D) 2620. E) 2600.

Q: A researcher added three samples of sodium chloride solution; the volumes were: 0.351 mL, 0.350 mL and 0.349 mL. The total volume should be reported as A) 1.05 mL. B) 1.0 mL. C) 11 mL. D) 1.050 mL. E) 1.0500 mL.