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25 Cards in this Set
- Front
- Back
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Which of the following represents matter that could be described as macroscale? A. Bromine atom B. Molecules of water C. bacteria observed under a microscope D. a paperclip E. none of the above |
D. a paperclip |
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Atoms consist of three fundamental particles. What are these particles and their charges? |
A. Proton (+) Neutron (neutral) and Electron (-) |
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Which response lists characteristics of liquids? I. Volume does not vary much upon heating II. Shape is constant III. Easily compressed IV. Fills the container completely V. Flows |
Volume does not vary much upon heating and it flows. |
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Which of the following is a compound? -Cola -air -mercury -gasoline -calcium fluoride |
Calcium fluoride |
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What is the symbol for the element Potassium? |
K |
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Identify which of the following statements about elements and their abundance is False? -Each element has its own unique symbol -Oxygen and silicon are very common -More than 99% of the earth's mass is made up of only 10 of the naturally occurring elements -Most elements occur in nature as free elements, not in compounds -Gold is very uncommon |
Most elements occur in nature as free elements, not in compounds. |
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Which of the following units is not a correct fundamental unit for the SI system? -length meter -time second -mass gram -temperature kelvin -electric current ampere |
-mass gram |
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Which of the following is equivalent to 10 cm? |
100 mm |
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Express 21.5 cubic centimeters in quarts |
2.27 *10^-2 qt |
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Assuming that a lithium atom is spherical, calculate its volume in cm^3. The volume of a sphere is given by V = (4/3)π r^3. The radius of a lithium atom is 1.52 A. 1A= 10^-8 cm and π=3.14. |
1.47 X10^-23 cm^3 |
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It requires 2.26 *10^3 J to boil 1g of H2O. How many kJ are required to boil 1.00 lb of H2O? |
1030 kJ |
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Dark dental 22 carat gold is an alloy consisting of 92% Au, 4.9% Ag, and 3.1% Cu. If a patient leaves the dentist's office with 3.25 g of dark dental gold in her mouth, what mass of each element does she have in her mouth? (round off if tm doesnt equal 3.25g) |
3.0 Au 0.16 Ag 0.10 g Cu |
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A gold ring has a mass of 15.37 g. If this ring is pure gold (density =13.1 g/mL), what would the volume of the ring be3? |
0.955mL |
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Bromine, a brick red liquid, has a specific gravity of 3.12. What is the mass of 25.6 mL of bromine? |
79.9 g |
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The freezing point of agron is -189 C. What is its freezing point on the absolute temperature scale? |
84 K |
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The freezing point of the noble gas, argon, is 308 F. What is this temperature in Kelvins? |
84 K |
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An endothermic reaction... -evolves heat -is also called exothermic -would have its heat transferred measured in Joules -is not possible -would be described by all of the above |
-would have its heat transferred measured in Joules
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What is the specific heat of a 5.75 g piece of metal if the addition of 175 joules of heat causes a 22.3 C temperature increase? |
1.36 J/g C |
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If 100 grams of liquid water at 100 C and 200 grams of water at 20 C are mixed in an isulated container, what will be the final temperature of the water? the specific heat of water is 4.18 J/g J/g C |
46.7 |
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Which one of the following is a chemical property? -water freezes at 32F -Iron is a hard and shiny metal -Aluminum is easily corroded -Vinegar has a sour taste |
Aluminum is easily corroded |
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How many significant figures are there in measured number 0.0020? |
Two |
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If the density of rubbing alcohol, C3H8O, is 0.80 g/mL at 25C and 101 kPa, then what volume of alcohol would weigh 40.0 g? |
50. mL
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What are some experiments that might be performed to determine the identity of an unknown metal from the moon |
. |
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Why is having a universal system of units for the entire planet a good idea? Why does the United States still use other units? |
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A 50-lb rock is removed form the bottom of a pool and placed in a canoe on the surface of the pool. Does the water level int he pool increase of decrease? |
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