Classify each statement as an observation, a law, or a theory. When iron rusts in a closed container, the mass of the container and its contents do not change.

Q: All atoms of a given element have the same ______.mass number. c. number of nucleons.number of…

A: An atom is composed up of three subatomic particles  electrons, protons, and neutrons.

Q: Green chemistry rests on a set of 12 principles. What are they?

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Q: Classify each description as a hypothesis, theory, or law.-An untested explanation based upon…

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Q: Chemistry is the study of _______ and the changes it undergoes.     mixtures     matter     pure…

A: Correct answer : Matter.

Q: Chemical Properties Assignment Active Identifying Properties of Matter Determine which type of…

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Q: chemistry

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A: NOTE: Since you've posted multiple sub-parts, we'll solve only the first three sub-parts for you. To…

Q: Describe the properties of gases, liquids, and solids at a microscopic level and how those…

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A: To find: Whether the following changes are physical or chemical.

Q: Fact, Law, Hypothesis, or Theory? __ Table vinegar is analyzed as 4.0% by mass aqueous acetic acid.…

A: The answer is as follows:

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Q: Define physical change and chemical change and give an example of each

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Q: Classify each statement as an observation, a law, or a theory. Chlorine is a highly reactive gas.

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Introduction to chemistry

Chemistry is a branch of science that deals with the analysis of material and the substances that comprise it. It also manages the properties of these substances and their reactions to form new substances. It is basically centered on particles and atoms that make up components and mixtures. These chemical species will in general connect using bonds.