Chemistry Around Us
Water, salt and air: chemistry at its simplest.
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The questions
What is the chemical formula of water?
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The right answer: H2O
What is the chemical symbol for gold?
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The right answer: Au
Which gas do we need to breathe to stay alive?
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The right answer: Oxygen
Which gas makes up most of the Earth's atmosphere?
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The right answer: Nitrogen
What is the chemical symbol for sodium?
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The right answer: Na
What is the chemical name of table salt?
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The right answer: Sodium chloride
What is the pH of pure water?
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The right answer: 7
Which gas do plants take in for photosynthesis?
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The right answer: Carbon dioxide
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