4. The decomposition of SO2Cl2 is a first-order reaction: SO2Cl2 (g) → SO2 (g) + Cl2 (g). A 1.24 × 10–3 M sample of SO2Cl2 drops to 3.1 × 10−4 M after 495 min. a. What is the value of the rate constant, k?

b. What is the half-life for this reaction?

5. Gaseous azomethane, C2H6N2, decomposes according to the following equation:

C2H6N2 (g) → N2 (g) + C2H6 (g)

A 2.00 g sample if azomethane is placed in a flask at 425°C and the amount that

remain is recorded in the table shown.

a. Provide evidence for why this process is first-order.

b. Find the value for the rate constant, k. Include units.

c. After how much time will only 0.050 g remain?

6. Consider the decomposition of nitrogen dioxide, NO2: 2 NO2(g) → 2 NO(g) + O2(g)

a. Find the rate law for this reaction.

b. Find the value of the rate constant k. Include units.

c. In trial 2, how long will it take for [NO2] to reach 0.002 M?

At stp, what is the volume of 1 mole of co2?

Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025