Question

how many moles of cl₂ are in a container with a volume of 7.5 l at stp?

Explanation:

Step1: Recall STP molar volume

At STP (Standard Temperature and Pressure, 0°C and 1 atm), 1 mole of any ideal gas occupies 22.4 L. So the molar volume \( V_m = 22.4 \, \text{L/mol} \).

Step2: Use the formula \( n=\frac{V}{V_m} \)

We know the volume \( V = 7.5 \, \text{L} \) and \( V_m = 22.4 \, \text{L/mol} \). Substitute into the formula: \( n=\frac{7.5}{22.4} \).

Step3: Calculate the result

\( n=\frac{7.5}{22.4}\approx0.335 \, \text{mol} \).

Answer:

Approximately \( 0.335 \) moles (or more precisely \( \frac{7.5}{22.4}\approx0.335 \) mol)