how many moles of ar gas are present in a container with a volume of 78.4 l at stp?
how many moles of ar gas are present in a container with a volume of 78.4 l at stp?
Answer
Explanation:
Step1: Recall molar - volume at STP
At STP (Standard Temperature and Pressure: 0°C or 273 K and 1 atm), the molar volume of any ideal gas is 22.4 L/mol.
Step2: Calculate the number of moles
We use the formula $n=\frac{V}{V_m}$, where $n$ is the number of moles, $V$ is the volume of the gas, and $V_m$ is the molar - volume. Given $V = 78.4$ L and $V_m=22.4$ L/mol. $n=\frac{78.4\ L}{22.4\ L/mol}$ $n = 3.5$ mol
Answer:
3.5 mol