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Exam 1
Chemistry
| Question | Answer |
|---|---|
| If a balloon has a volume of 21.6 cups, what is the volume of this balloon expressed in L? | 5.09 L |
| recommended dietary allowance for calcium for teenage children 1,300 mg per day. If 8.0-fl oz glass of reduced-fat milk contains 298 mg of calcium, how many fluid ounces of milk does a teenager need to drink to get entire recommended amount of calcium | 35 fl oz |
| Which is the proper conversion factor for converting a mass expressed in pounds (lb) to the same mass expressed in grams (g)? | 454g/1 lb |
| For a person between the ages of 10 and 29, the normal range of blood triglycerides is 53 × 104 mg/dL. What is the correct interpretation of the units in this measurement? | milligrams per deciliter |
| What is the mass in grams of 85.32 mL of blood plasma with a density of 1.03 g/mL? | 87.9 g |
| If a package of nuts weighs 41.3 oz, what is the mass of the package expressed in milligrams? | 1.17 × 106 mg |
| When 5.5490 × 108 is correctly rounded to three significant figures the number becomes | 5.55 × 108 |
| Walking at a brisk pace burns off about 280 Cal/h. How long would you have to walk to burn off the Calories obtained from eating a candy bar that contained 3 g of protein, 12 g of fat, and 28 g of carbohydrates? | 50 minutes |
| A peanut butter and jelly sandwich contains 9.00 g of fat, 6.00 g of protein, and 25.0 g of carbohydrate. How many Calories does this sandwich provide? | 205 Cal |
| largest amount of stored energy | fat |
| It requires less heat to melt a 10-g sample of water than to vaporize a 10-g sample of water. | true |
| Condensation is the opposite of sublimation. | false |
| Sarin, a nerve gas once used as a chemical weapon, has a melting point of –56 °C and a boiling point of 158 °C. A sample of sarin at room temperature (22 °C) exists as a liquid. | true |
| The law of conservation of energy states that | energy cannot be created or destroyed |
| Kinetic energy is the energy associated with movement; potential energy is the energy inherent in an object due to its position or composition. | true |
| The specific heat of copper is 0.092 cal/g-C, and the specific heat of silver is 0.057 cal/g-C. What happens when 100 cal of heat is added to 1 g of each at 25 C? | the silver will reach a higher temperature |
| A burn from steam at 100 C is expected to be more severe than a burn from boiling water at 100 C because | The steam will give off a large amount of heat as it condenses |
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