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20 Cards in this Set
- Front
- Back
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1) Which of the following would not be considered matter? A) light B) trees C) air D) clouds E) rain |
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1) Which of the following would not be considered matter? A) light B) trees C) air D) clouds E) rain |
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5) Which of the following is an example of a physical change? A) water boiling and being converted into steam B) water being electrolyzed and being converted in hydrogen and oxygen C) iron metal reacting with oxygen to form rust D) a candy bar being digested by a student E) charcoal being converted into ash |
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6) Which of the following would not be considered a chemical property? A) the temperature at which a liquid will boil B) light sensitivity C) whether a metal will rust or not D) whether a material will dissolve in acid or not E) the tendency of a material to explode |
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7) Which of the following would be considered a chemical property? A) reactivity towards water B) melting temperature C) boiling temperature D) conductivity E) flexibility |
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8) Water and ethanol can be separated by heating the ethanol until it boils away from the water. What type of change is this? A) a physical change B) a chemical change C) a molecular change D) a decomposition E) none of the above |
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9) The boiling point of methanol is 65°C and the boiling point of ethanol is 78°C. Which of the following statements is true? A) At 70°C you would have methanol gas and liquid ethanol. B) At 90°C you would have methanol and ethanol as solids. C) At 50°C you would have methanol and ethanol as gases. D) At 40°C the methanol reacts with the ethanol. E) none of the above |
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10) What chemical change occurs when a wax candle burns? A) The wax near the flame melts. B) The molten wax is pulled upwards through the wick. C) The wax within the wick is heated to about 600°C. D) The heated wax molecules combine with oxygen molecules. |
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11) Classify the following changes as physical or chemical. Wood burns to ashes; water begins to boil; grass grows; a rock is crushed to powder. A) chemical; physical; chemical; chemical B) chemical; physical; physical; physical C) physical; physical; chemical; physical D) chemical; physical; chemical; physical |
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12) The element silicon has a melting point of 1,410°C and a boiling point of 2,355°C. It is a weak conductor of electricity, its density is 2.3 grams per cubic centimeter and it easily forms silicon dioxide when exposed to air. Which of the following is a chemical property of silicon? A) its ability to conduct electricity B) its density C) its melting point D) its ability to react with oxygen E) C and D |
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14) If you eat metallic sodium or inhale chlorine gas, you stand a strong chance of dying. Let these two elements react with each other, however, and you can safely sprinkle the compound on your popcorn for better taste. What is going on? A) After these two elements react they lose the potential energy to cause harm. B) All elements are inherently dangerous C) Sodium and chlorine from the elemental form is more concentrated than the sodium and chlorine we get from sodium chloride. D) Sodium chloride has nothing in common with sodium and chlorine. |
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15) Oxygen atoms are used to make water molecules. Does this mean that oxygen, O2, and water, H2O, have similar properties? A) Yes, and this explains how fish are able to breathe water. B) Yes, but that their properties are similar is only a coincidence. C) No, compounds are uniquely different from the elements from which they're made. D) No, but their similar properties are only a coincidence. |
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16) If you have two molecules of TiO2, how many oxygen atoms would you have? A) 4 B) 2 C) 3 D) 6 |
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17) How many different elements are in the compound C6H12O6? A) 3 B) 6 C) 24 D) All of the elements are the same. |
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18) How many atoms of Oxygen (O) are in H3OClO4 A) 5 B) 2 C) 3 D) 7 E) 1 |
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19) How many atoms are in one molecule of Na2SO4? A) 7 B) 2 C) 4 D) 3 E) 24 |
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20) Which statement best describes a compound? A) a material that is made up of a combination of atoms bonded together B) a mixture of more than one element C) a mixture of atoms D) a material that is made up of a single type of atom E) none of the above |
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21) What is the name of the following compound? SF3 A) sulfur trifluoride B) sulfur fluoride C) trifluorosulphide D) fluorine sulphide E) none of the above |
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22) What is the name of the following compound? CO2 A) carbon dioxide B) dicobalt C) dioxocarbon D) calcium oxide E) calcium dioxide |
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23) What is the name of the following compound? CaCl2 A) calcium chloride B) carbon chloride C) dichlorocalcium D) calc two E) dicalcium chloride |
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