Question

the diagrams below show two pure samples of gas in identical closed, rigid containers. each colored ball represents one gas particle. sample a temperature: 185°c sample b temperature: 185°c which sample has the higher gas pressure? sample a sample b neither; the samples have the same gas pressure

Explanation:

Step1: Recall ideal gas law

$PV = nRT$. In identical closed, rigid containers, $V$ is constant, and $T$ is the same ($185^{\circ}C$ for both samples). $R$ is the ideal - gas constant. The pressure $P$ is directly proportional to the number of moles $n$.

Step2: Compare number of gas particles

Counting the particles, Sample A has more gas particles than Sample B. Since the number of moles is proportional to the number of particles ($n=\frac{N}{N_A}$, where $N$ is the number of particles and $N_A$ is Avogadro's number), Sample A has a higher number of moles.

Step3: Determine pressure

As $P$ is directly proportional to $n$ (from $PV = nRT$ with $V$, $T$, and $R$ constant), Sample A has a higher gas pressure.

Answer:

sample A