5. What are chemicals
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a pure substance contains only one element or compound. Mineral water is mostly water, but there are other substances mixed with it. ... Even the most pure water will contain dissolved gases from the air. Impurities in a substance will affect its properties. For example, they may change its boiling point.
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A chemical substance is a material with a specific chemical composition. In everyday language, only synthetic chemicals might be understood as chemicals. Chemical may also refer to: Chemical industry. Chemical element.
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