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Chemistry, 29.03.2020 00:52 sweetcandy16gaming
3. Prolonged exposure to lead or lead salts is toxic. To prevent lead poisoning, the current standard for lead paint is 600.0 ppm. Some older paints had a much higher concentration of lead.
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3. Prolonged exposure to lead or lead salts is toxic. To prevent lead poisoning, the current standar...
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