Calculate the Root-Mean-Square Speed of an O₂ Molecule with an Average

question 59

Multiple Choice

Calculate the root-mean-square speed of an O₂ molecule with an average kinetic energy of 6.2 $\times$ 10^-21 J at 25 ^$\circ$ C. (1 J = 1 kg . m²/s²; 1 mol = 6.02 $\times$ 10²³)

• A)20 pm/s
• B)230 km/s
• C)480 m/s
• D)120 m/s
• E)230 m/s

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Definitions:

System II

A cognitive unit or system in psychology that is responsible for deliberate, analytical, and effortful decision-making processes.

Confirmation Bias

The tendency to take evidence that’s consistent with your beliefs more seriously than evidence inconsistent with your beliefs.

Availability Heuristic

The availability heuristic is a cognitive bias that relies on immediate examples that come to mind when evaluating a specific topic, concept, method, or decision.

Representativeness Heuristic

A cognitive shortcut that people use to classify something as belonging to a certain category based on how similar it is to a typical case from that category.