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Taxpayers should keep all supporting documentation (credit card statements, etc.) for a tax return for at least three years after the return is filed.
Buffer
A solution that resists changes in pH when acid or alkali is added, mainly composed of a weak acid and its conjugate base.
Chemical Equation
A symbolic representation of a chemical reaction, showing the reactants, products, and, in some cases, the direction of the reaction.
Carbon Dioxide
A clear, unscented gas resulting from the burning of carbon-containing compounds and the act of respiration, which plants use in the process of photosynthesis.
Water
A ubiquitous chemical substance with the formula H2O, vital for all known forms of life and used in a myriad of industrial processes.
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