Coefficients, in balanced

Understanding the properties of gases is important because gases are often reactants or products in chemical reactions. For this reason, we are often faced with calculating the volumes of gases consumed or produced in reactions. We have seen that the coefficients in balanced chemical equations tell us the relative amoimts (in moles) of reactants and products in a reaction. The number of moles of a gas, in turn, is related to P, V, and T. 

Remember, coefficients in balanced equations refer to the formula that follows the coefficient. With this in mind, note that the following statement is consistent with this balanced equation ... 

Think About It Remember that the coefficients in balanced chemical equations indicate ratios in molecules or moles. Under conditions of constant temperature and pressure, the volume of a gas is proportional to the number of moles. Therefore, the coefficients in balanced equations containing only gases also indicate ratios in liters, provided the reactions occur at constant temperature and pressure. 

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