3. Even after twenty years of use most quarters have the same shiny appearance that they did when they were minted. Most pennies, however, have dulled considerably. What does this suggest about the position of the metal used to make quarters and the metal used to make pennies on the activity series? 4. Post 1982 pennies have a zinc core with a thin copper outer shell. Using your activity series predict what would happen if a post 1982 penny were put into a solution of hydrochloric acid?
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Chemistry, 22.06.2019 08:30
Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains
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Chemistry, 22.06.2019 15:30
Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.
Answers: 2
Chemistry, 22.06.2019 18:50
Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g. what is the percent by mass of water in the hydrate? %
Answers: 1
Chemistry, 23.06.2019 14:00
If you fill your car tire to a pressure of 32 psi (pounds per square inch) on a hot summer day when the temperature is 35°c (95°f), what is the pressure (in psi) on a cold winter day when the temperature is -15°c (5°f)? assume no gas leaks out between measurements and the volume of the tire does not change.
Answers: 1
3. Even after twenty years of use most quarters have the same shiny appearance that they did when th...
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