Chemistry
What is the third most abundant gas in the earth's atmosphere?
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What is the second-most abundant element in the universe, though it is much less common on Earth?
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Which element gained notoriety from poisoning the waters around Japan?
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What number is also the same as proton number and the number of electrons of a neutral atom?
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Which of the following carbocations is most stable?
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What compounds that are soluble in water are classed as bases?
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What percentage of acetic acid is legally allowed in vinegar?
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