General Chemistry Answers

Consider a hypothetical ionic compound AB (comprised of A⁺ and B^- ions).

Given the following enthalpy data and using a Born-Haber cycle calculation, predict ΔH_lattice in kJ mol^-1.

A_(s) + B_(s) → AB_(s) Δ_rH = -430 kJ mol^-1

A_(s) → A_(g) Δ_rH = 111 kJ mol^-1

B_(s) → B_(g) Δ_rH = 100 kJ mol^-1

First ionization energy of A_(g) = 507 kJ mol^-1

Electron affinity enthalpy of B_(g) (exothermic) = -343 kJ mol^-1

Given the schematic notation: Cu | Cu2+ (0.0200 M) ∥ Ag+

(0.0200 M) | Ag, calculate the cell

potential of this system. Show all calculation.

Write the electron configuration in orbital box notation for the following element

a. Xenon d. Aluminum

b. Tungsten e. Cesium

c. Silver

Carbon reacts with oxygen to form two compounds. Compound A contains 2.61 g of carbon for every 3.49 g of oxygen.  Compound B contains 6.94 g of carbon for every 18.5 g of oxygen. What is the smallest whole mass ratio of oxygen that combines with a fixed mass of carbon.

If you have 10.7 moles of chloride ions, how many chloride ions do you have?

Gaseous methane CH4 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. Suppose 0.160g of methane is mixed with 0.44g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to 2 significant digits.

Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq)

HCl(aq), as described by the chemical equation

MnO

2

(s)+4HCl(aq)⟶MnCl

2

(aq)+2H

2

O(l)+Cl

2

(g)

MnO2(s)+4HCl(aq)⟶MnCl2(aq)+2H2O(l)+Cl2(g)

How much MnO

2

(s)

MnO2(s) should be added to excess HCl(aq)

HCl(aq) to obtain 175 mL Cl

2

(g)

175 mL Cl2(g) at 25 °C and 765 Torr

A 5,5g of a gas contained in 1.50 L at 250C exerts a pressure of 741 torr. What is the molar mass of the gas? (1 atm=760 torr)

13.2g of a gas occupies a volume of 0.918dm³ at 25°C and a pressure of 900 torr was found to have 2.73 g of a gas calculate the molecular mass of the gas?

3a) Aluminum reacts with chlorine gas to form aluminum chloride, What is its balanced equation?

3b)Determine the limiting reactant between 34.0 g of aluminum and 39.0 g of chlorine gas.