| 4.
| A pile of grain does not burn easily yet silo and grain elevator explosions can be very violent. Propose a reason for this. (The picture below is of the Nabisco grain elevators in Niagara Falls, New York.)
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| 5.
| Aspirin reacts with water to form salicylic acid and acetic acid. Why does keeping the bottle tightly closed help prevent this?
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| 6.
| It is known that the average person can "burn off" one alcoholic drink per hour. This is true no matter how much they drink. Does this agree with your observations about the rate of a reaction and the concentration of the reactants?
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