Which of the following lists correctly identifies the four variables used to describe gases in the ideal gas law, along with one possible unit for each variable?

• A. Pressure (atm), Volume (L), Temperature (K), Amount (mol)
• B. Pressure (mmHg), Volume (mL), Temperature (°C), Amount (g)
• C. Pressure (bar), Volume (m^3), Temperature (°C), Amount (atoms)
• D. Pressure (Pa), Volume (cm^3), Temperature (°F), Amount (kg)

Answer: (A)

Verified step by step guidance

1. Identify the four variables used in the ideal gas law, which are Pressure (P), Volume (V), Temperature (T), and Amount of gas (n).
2. Recall the ideal gas law formula: \(P \times V = n \times R \times T\), where \(R\) is the ideal gas constant.
3. Understand the correct units for each variable to be consistent with the ideal gas law: Pressure should be in atmospheres (atm), Volume in liters (L), Temperature in kelvin (K), and Amount in moles (mol).
4. Evaluate each list of units given in the problem and check if they match the standard units for the ideal gas law variables.
5. Conclude that the list with Pressure (atm), Volume (L), Temperature (K), and Amount (mol) is the correct set of variables and units for the ideal gas law.