Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
Which of the following processes are spontaneous? (Select all that apply.) A satellite falls back to earth. A kitchen gets cluttered. A house is built. A satellite is launched into orbit.
MnSO4(aq) is converted to MnO2(s) in a basic medium as oxygen gas is converted to hydroxide ion. In this case, is the sulfate ion a spectator ion. (NaOH is also present. Is sodium ion also a spectat
Use an enthalpy diagram to calculate the lattice energy of CaCl2 from the following information. Energy needed to vaporize one mole of Ca(s) is 192 kJ.
Describe the reaction and mechanism of solvolysis reaction of tert-butyl bromide in ethanol.
"Calculate the CH3CO2+ in a solution that is 0.50 M CH3CO2H and 0.25 M HCl (Ka CH3CO2H = 1.8 x 10^-5)" If acetic acid will not really react with a strong acid like HCl, why is the salt given as a po
The equilibrium constant for H2(g)+I2(g)->2HI at 40 oC is 20. The vapor [pressure of solid iodine at 40 oC is 0.1 bar. 12.7 g of solid iodine is placed in a 10 L vessel. What is the minimum amoun
Consider an amphoteric hydroxide, M(OH)2(s), where M is a generic metal. M(OH)2 --> M^(2+0 +2OH^(-) Ksp= 5x10^(-16) M(OH)2 +2OH^(-) --> M(OH)4^(2-) Kf= 0.07. Estimate the solubility of M(OH)2
How do i calculate the volume of SO2 at standard conditions (25 degrees C and 1.00 atm pressure) produced from the heat treatment of 10.00 metric tons of NiS, assuming the reaction goes to completio
Rearrange the equation discovered by Balmer to solve for n2 (get n2 by itself): 1/? = R(1/2^2 - 1/n^2) where: ? = is the wavelength of the photon (E=hc/?) R = Rydberg's constant (1.0974x10^7 m^-1) n
What is the partial pressure of O2 (in millimeters of Hg) in a hyperbaric chamber pressurized to 5 atm with air that is 18% in
The maximum kinetic energy observed for these electrons is 1.488 x 10?19 J/electron. What is the wavelength of a laser which will turn the photocell on and cause electrons to be ejected which have a
The compound has a molecular formula of C7H14O2. Draw the structure from the following NMR data: Ha=1H 1.2 ppm Hb=3H 1.3 ppm Hc=4H 4.1 ppm
An aqueous solution of KCl is colorless, KMnO4 is purple, and K2Cr2O7 is orange. What color would you expect of an aqueous solution of Na2Cr2O7? Explain.
The enthalpy of formation of MX2 is ?Hf° = -829 kJ/mol. The enthalpy of sublimation of M is ?Hsub = 117 kJ/mol. The first and second ionization energies of M are IE1 = 717 kJ/mol and IE2 = 1433
A water has a pH = 7.4 and an alkalinity of 400 mg/l as CaCO3. The first dissociation constant for carbonic acid (H2CO3) is K1 = 4.45e-7. Assume all activity coefficients are equal to 1.0. What is t
what is the wavelength (in nanometers ) of the spectral line that correspond the n=6 level to the n=1 level in the hydrogen atom
What is the total hardness in mg/l as CaCO3. what is the total alkalinity in mg/l as CaCO3. what is the phenolphthalien alkalinity in mg/l as CaCO3. Calculate the total dissolved solids in mg/l. wha
If 25.00 mL of 0.20 M HCl is titrated with 0.20 M NaOH, what is the pH of the solution after the addition of 20.00 mL of NaOH?
If an electrode has a potential of -1.004 V with respect to a saturated calomel electrode, what is the potential with respect to a silver-silver chloride electrode
Using Hess' Law, calculate the enthalpy of formation for C3H8(g) using the following thermodynamic data. C(s) + O2(g) ----> CO2(g) delta H =-393.5 kj/mol
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal place
Calculate the theoretical yield in grams of the precipitate formed. 3. If the actual yield of the experiment was 90.5 mg, what is the % yield of Ag3PO4
Both of the sulfur-oxygen double bonds in SO_2 are polar. In which direction should the polarity arrows point? Both of the sulfur-oxygen double bonds in are polar.
Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydrogen peroxide,H2O2 , can be titrated against a solution of potassium
The titration of a 25 ml sample of 0.110 M HC2H3O2 with 0.130 M NaOH. Determine the following? the initial pH, the volume of added base required to reach the equivalence point