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13 billion years ago, what did the universe use to start nuclear fusion?
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Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.
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What does the symbol (–hfus) indicate in a phase change?
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Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.
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13 billion years ago, what did the universe use to start nuclear fusion?...
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