Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
A gas with a pressure of 1.33 atm, is transferred to a container with twice the volume and the temperature was tripled. What is the new pressure of the gas?
Calculate the concentrations of ALL species at equilibrium for each of the following cases.
At 760. Torr, an unknown liquid boils at 239.8 K. At 205.0 K the equilibrium vapor pressure of the unknown liquid is 103.5 Torr. What is the molar enthalpy of vaporization for this liquid?
Question: A chem 216 student titrated 5.15 g of an unknown weak acid with 0.92M of NaOH. Equivalence point was found to be 52.1 mL. What is the molecular weight of the unknown weak acid?
A chemist finds that 90.00 grams of an unknown compound contains 32.76 grams of manganese, 19.08 grams of sulfur, and 38.16 grams of oxygen. Find the empirical formula for this compound.
A sample of a certain gas has a volume of 415 mL at 725 mm Hg and 0oC. What would be the volume of this same sample of gas if it were measured at STP?
Calculate the equilibrium constant Ka, for the ionization of formic acid in aqueous solution at 25 degrees celsius. delta G^0=21.3 kJ at 25 degrees celsius
Find the empirical formula of caproic acid. Show work in detail. If molecular mass of caproic acid is 116.2 amu, what is the molecular formula?
Calculate the concentration of arsenic in ppb in a 0.05 mg/L solution. Assuming that the solution is entirely water and density of the solution is 1.0 g/mL.
Assume that 3.0g of aniline and 4.5 mL of acetic anhydride are used in the preparation of acetanilide according to the following equation. What is the limiting reagent?
The bond length in an HI molecule is 1.61 angstrom and the measured dipole moment is 0.44 D. What is the magnitude (in units of e) of the negative charge on I in HI? (1 debye=3.34x10^-30 Cm; e=1.6x1
A 10.0 g piece of metal at 100 C is transferred to a calorimeter containing 50.0 mL of water initially at 23.0 C. Calculate the specific heat capacity of the metal if the heat capacity of the calori
In the first 15.0 s of the reaction, 1.7×10-2 mol O2 is produced in a reaction vessel with a volume of 0.370L. What is the average rate of the reaction over this time interval?
Question: What is the rate of the following reaction (M/s) if the rate constant for the reaction is 0.800 L•mol-1•s-1 and the concentration of each reactant is 0.0553 M. (The units for the
A reaction has a rate constant of 1.28×10-4 /s at 27 C and 0.232 /s at 27C and .231/ s 77 at C.? What is the activation barrier?
A hydrogen atom initially in the n=7 quantum state emits a photon having a wavelength of 2.16495E-6 m. What is the quantum number of the final state of the atom?
What are the principal causes for the differences in conductance's of isomolar solutions of KNO3, HNO3, Ca(NO3)2 and Al(NO3)3?
What is the vapor pressure at 25oC, of a solution containing 4.00 x 10^2 g of sucrose, C12H22O11, in 5.00 x 10^2 g of water?
A mixture of helium and neon weighing 5.50g occupies a volume of 6.80 L at 300 K and 1.00 atm. Calculate the composition of the mixture in mass percent.
A 2.56 g sample of anthracene, C14H10, was burned to heat an aluminum calorimeter (mass=948g). The calorimeter contained 1.5 L of water with an initial temp of 20.5 C and a final temperature of 34.
How much energy in kilojoules is released when 15.3 g of steam at 115.0 degree C is condensed to give liquid water at 750.0 degree C?
A 500 mL gas sample is collected over water at a pressure of 740 mmHg and 25 degrees Celsius. What is the volume of the dry gas at STP? (STP=1atm and 0 degrees celsius). (Vapor pressure of H2O at 25
The half-life for the first order conversion of cyclobutane to ethylene
How much heat is needed to convert 885 g of ice at -10°C to steam at 119°C? (The specific heats of ice, steam, and liquid are 2.03 J/g · °C, 1.99 J/g · °C, and 4.18 J/g
The activity of a radioisotope is 3000 counts per minute at one time and 2736 counts per minute 48 hours later. What is the half-life of the radiosiotope.