In the Arrhenius equation ($k = A e^{-E_a/RT}$), the term $E_a$ explicitly represents the:

The presence of a positive catalyst increases the rate of a chemical reaction by:

The unit of the rate constant for a first-order reaction is:

What is the precise standard molar mass of Sodium Hydroxide (NaOH)?

What is the precise standard molar mass of Methane (CH4)?

Using the Ideal Gas Law (PV=nRT), calculate the approximate volume occupied by 3 moles of an ideal gas at 1 atm pressure and 273 K. (Assume R = 0.0821 L·atm/mol·K)

Using the Ideal Gas Law (PV=nRT), calculate the approximate volume occupied by 5 moles of an ideal gas at 1 atm pressure and 400 K. (Assume R = 0.0821 L·atm/mol·K)