Georges Leclanche improved the basic battery cell by using a solution of water and ____ instead of hydrochloric acid.
a. ammonium chloride
b. sulfuric acid
c. ammonium phosphide
d. magnesium chloride
a. ammonium chloride
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The eutectic alloy in the heater barrel element is a material that goes from a solid state to a liquid state without going through an intermediate ____ stage.
a. gas b. plasma c. putty d. magnetic
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What factors make community gardens popular to urban residents?
What will be an ideal response?
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What are the leaves that give poinsettias their color?
A) Pinched B) Bracts C) Breaks D) Sleeves
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Cotton became so important to the South that it was known as ____________________
Fill in the blank(s) with correct word
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