A student uses the value 0.0821 L• atm/mol • K for the gas constant in the ideal gas law. What are the most appropriate units for pressure, volume, and temperature in this case?

In the ideal gas law, the units used for pressure, volume, and temperature must match the units in the gas constant. The value 0.0821 has units of L·atm/(mol·K), so use pressure in atmospheres, volume in liters, and temperature in kelvin. Therefore, choice C is correct.

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