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no atoms are gained or lost during a chemical reactions.
the time required for half the atoms present in an object have undergone radioactive decay and...
compounds that have different structural formulae but the same molecular formula.
temperature at which a substance changes phase from a liquid to a solid at a specific or fixed...
dealing with quantities as well as the nature of the substances under consideration.
the relationship between volume and temperature for a fixed amount of a gas at constant pressure...