Trace metals and organic contaminants are normally present at sub ppb levels in waters. What is the equivalent mass concentration for "ppb" that is commonly used in water analysis? A. g/L В. C. mg/L D. ng/L

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.