## Question

###### Use the following information to identify element $mathrm{A}$ and compound $mathrm{B}$, then answer questions a and $mathrm{b}$.An empty glass container has a mass of $658.572 mathrm{~g} .$ It has a mass of $659.452 mathrm{~g}$ after it has been filled with nitrogen gas at a pressure of 790 . torr and a temperature of $15^{circ} mathrm{C}$. When the container is evacuated and refilled with a certain element (A) at a pressure of 745 torr and a temperature of $26^{circ} mathrm{C}$, it has a mass o

Use the following information to identify element $mathrm{A}$ and compound $mathrm{B}$, then answer questions a and $mathrm{b}$. An empty glass container has a mass of $658.572 mathrm{~g} .$ It has a mass of $659.452 mathrm{~g}$ after it has been filled with nitrogen gas at a pressure of 790 . torr and a temperature of $15^{circ} mathrm{C}$. When the container is evacuated and refilled with a certain element (A) at a pressure of 745 torr and a temperature of $26^{circ} mathrm{C}$, it has a mass of $660.59 mathrm{~g}$ Compound $mathrm{B}$, a gaseous organic compound that consists of $85.6 %$ carbon and $14.4 %$ hydrogen by mass, is placed in a stainless steel vessel $(10.68 mathrm{~L})$ with excess oxygen gas. The vessel is placed in a constant-temperature bath at $22^{circ} mathrm{C}$. The pressure in the vessel is $11.98 mathrm{~atm}$. In the bottom of the vessel is a container that is packed with Ascarite and a desiccant. Ascarite is asbestos impregnated with sodium hydroxide; it quantitatively absorbs carbon dioxide: $$ 2 mathrm{NaOH}(s)+mathrm{CO}_{2}(g) longrightarrow mathrm{Na}_{2} mathrm{CO}_{3}(s)+mathrm{H}_{2} mathrm{O}(l) $$ The desiccant is anhydrous magnesium perchlorate, which quantitatively absorbs the water produced by the combustion reaction as well as the water produced by the above reaction. Neither the Ascarite nor the desiccant reacts with compound $mathrm{B}$ or oxygen. The total mass of the container with the Ascarite and desiccant is $765.3 mathrm{~g}$ The combustion reaction of compound $mathrm{B}$ is initiated by a spark. The pressure immediately rises, then begins to decrease, and finally reaches a steady value of $6.02 mathrm{~atm} .$ The stainless steel vessel is carefully opened, and the mass of the container inside the vessel is found to be $846.7 mathrm{~g}$. $mathrm{A}$ and $mathrm{B}$ react quantitatively in a $1: 1$ mole ratio to form one mole of the single product, gas $mathrm{C}$. a. How many grams of $mathrm{C}$ will be produced if $10.0 mathrm{~L} mathrm{~A}$ and $8.60 mathrm{~L}$ $mathrm{B}$ (each at STP) are reacted by opening a stopcock connecting the two samples? b. What will be the total pressure in the system?