Reactivity 2. How much, how fast and how far?

What volume (in $dm^3$) does $1 \text{ mole}$ of any ideal gas occupy at $273 \text{ K}$ and $100 \text{ kPa}$?

If the experimental yield is exactly the same as the theoretical yield, what is the percentage yield?

What is the molar mass of $H_2$? ($H = 1.01$)

What is the concentration of a solution containing $0.1 \text{ moles}$ in $100 \text{ cm}^3$?

A solution is made by dissolving $1.0$ mole of $FeCl_3$ in water to make $1.0$ dm$^3$. What is the concentration of chloride ions?

What is the atom economy for the reaction $Li(s) + H_2O(l) \rightarrow LiOH(aq) + 0.5H_2(g)$ if $LiOH$ is the desired product? ($M_{Li}=6.9, M_{H_2O}=18.0, M_{LiOH}=24.9, M_{H_2}=2.0$)

Which of the following contains the same number of molecules as $2.0$ g of $H_2$?

Identify the limiting reactant when $0.10 \text{ mol}$ of $P_4$ reacts with $0.50 \text{ mol}$ of $O_2$ to form $P_4O_{10}$.

A $2.50 \text{ g}$ sample of an impure calcium carbonate ($M_r = 100$) produced $0.44 \text{ g}$ of $CO_2$ ($M_r = 44$) when reacted with excess acid. What is the percentage purity of the sample?

What mass of $NH_3$ is produced when $28.0 \text{ g}$ of $N_2$ reacts with $12.0 \text{ g}$ of $H_2$? ($A_r: N=14, H=1$)

Which of the following properties can be used to measure the rate of reaction between $Zn(s)$ and $CuSO_4(aq)$?

Why does a reaction eventually stop?

In the context of rates, what does a steep gradient on a 'Concentration vs Time' graph indicate?

If a catalyst is present, what change occurs on the Maxwell-Boltzmann distribution graph?

The Maxwell-Boltzmann distribution curve below shows the distribution of kinetic energies in a gas sample at a constant temperature. $E_{a1}$ is the activation energy for the uncatalyzed reaction, and $E_{a2}$ is the activation energy for the same reaction with a catalyst. What does the shaded area between $E_{a2}$ and $E_{a1}$ represent?

A student monitors the mass of a reaction vessel during the reaction: $MgCO_{3}(s) + 2HCl(aq) \rightarrow MgCl_{2}(aq) + H_{2}O(l) + CO_{2}(g)$. Curve X represents the results using $1.0 \ g$ of marble chips ($MgCO_{3}$) and $50 \ cm^{3}$ of $1.0 \ mol \cdot dm^{-3} \ HCl$ at $25^{\circ}C$. Which change to the experimental conditions would most likely produce Curve Y?

An energy profile for a specific chemical reaction is shown in the diagram below. The energy required to reach the transition state from the reactants is $150 \ kJ \cdot mol^{-1}$, and the energy required to reach the transition state from the products is $70 \ kJ \cdot mol^{-1}$. What is the enthalpy change ($\Delta H$) for the forward reaction?

A student compares the reaction of $1.0 \text{ g}$ of Calcium with water and $1.0 \text{ g}$ of Magnesium with water. Calcium reacts much faster. What is the best explanation?

What happens to the rate of an exothermic reaction as it proceeds at constant temperature?

Which of the following energy profile features is changed by the addition of a catalyst?

What defines the 'extent of a reaction'?

Consider the equilibrium: $N_2O_4(g) \rightleftharpoons 2NO_2(g)$. If the pressure is increased by decreasing the volume, the equilibrium will shift to the:

If the volume of a gaseous equilibrium system is doubled, what happens to the total pressure?

In the Contact process for making sulfuric acid, the key step is $2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g)$. Which catalyst is used?

If $K_{c}$ is very small ($K_{c} < 10^{-3}$), which of the following is true for the reaction $A \rightleftharpoons B$?

What happens to the equilibrium $N_{2}(g) + 3H_{2}(g) \rightleftharpoons 2NH_{3}(g)$ when an inert gas like Argon is added at constant volume?

In the equilibrium $CO(g) + H_{2}O(g) \rightleftharpoons CO_{2}(g) + H_{2}(g)$, the initial concentrations of $CO$ and $H_{2}O$ are $1.0 \text{ mol dm}^{-3}$. If $K_{c} = 1.0$, what is the concentration of $H_{2}$ at equilibrium?

If a reaction $A + B \rightleftharpoons C + D$ has a very large $K_c$, what can be said about the activation energy of the forward reaction ($E_{af}$) compared to the reverse reaction ($E_{ar}$)?

For a reaction with $K_c = 1$, which of the following must be true at equilibrium?

For the equilibrium $2NO_2(g) \rightleftharpoons N_2O_4(g)$, if the total pressure is increased by decreasing volume, the color of the mixture (where $NO_2$ is brown and $N_2O_4$ is colorless):