General Chemistry I (CHM 101) Mock Exam 3

A catalyst increases the rate of a chemical reaction by:

Which type of electrochemical cell operates by using an external current to drive a non-spontaneous reaction?

Two different atoms are considered isotones if they have the same number of:

For the Haber process, $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$, at $500^\circ C$, if the equilibrium concentrations are $[N_2] = 1.5 M$, $[H_2] = 2.0 M$, and $[NH_3] = 0.75 M$, calculate the equilibrium constant $K_c$ at this temperature.

Which of the following molecules exhibits a bent molecular geometry due to the presence of lone pairs on the central atom?

What salt is formed when nitric acid ($HNO_3$) reacts with potassium hydroxide ($KOH$)?

Which of the following gases will diffuse at the slowest rate at a given temperature? (Molar masses: $CH_4 = 16 \text{ g/mol}$, $NH_3 = 17 \text{ g/mol}$, $CO_2 = 44 \text{ g/mol}$, $H_2 = 2 \text{ g/mol}$)

For a reaction $A \rightarrow B$, the following initial rate data were collected:

Which of the following pairs represents isotones?

Evaluate the following statement: "Adding a catalyst to a system at equilibrium will increase the yield of products by shifting the equilibrium to the right."