Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
The momentum of a particle is given by m*v where m is the mass ofthe particle and v its velocity. The kinetic energy is givenby 1/2 m*v^2. Two particles have the same de-Broglie wave length, however
An element crystalizes in a body centered cubic lattice. theedge of the unit cell is 3.36 angstroms, and the density of thecrystal is 7.97g/ cm3. what is the atomic weight of the element in grams pe
Solid Calcium hydroxide is dissolved in 500 mL of water until the pH of the solution is 10.75. Calculate the grams of calcium hydroxide dissolved assuming calcium hydroxide is a strong base.
When molecules are represented by molecularmodels, what does each sphere represent? How big is the nucleus of an atom in comparison to the sphere used to represent an atom in amolecular model?
If the vapor pressure for benzene and toluene at 25 degrees Celsius is 94 mmHgand 20 mmHg respectively, What is the approximate vapor pressure of a solution made from 25% benzene and 75% toluene at
A new temperature scale is proposed based on the melting andboiling point of benzene. ( the melting point os benzeneis 5.53 (degree Celsius) and the boiling point ofbenzene is 80.10 (degree Celsius
The activation energy for a reaction is changed from 241 kJ/molto 55.5 kJ/molat 641 K by the introduction ofa catalyst. If the uncatalyzed reaction takesabout 2890 years to occur, about how long wil
Starting in the ground state n = 1 is a hydrogen atom, an electronis excited to a higher energy level by absorption of 121.6 nmlight. What is the final energy state of the electron?
When 12.3 g of an unknown, non-volatile, non-electrolyte, X was dissolved in 100. g of methanol, the vapor pressure of the solvent decreased from 122.7 torr to 118.6 torr at 298 K. Calculate the mo
When a sample of a simple hydrocarbon,CxHy, is burned in oxygen 0.300 g ofCO2 and 0.123 g of H2O are isolated. Themolecular weight of the compound was determined to be 70.1 g in aseparate experiment
A common laboratory reaction is the neutralization of an acid with a base. When 60.0 mL of 0.25 M nitric at 24.5 degree C is added to 60.0 mL of 0.275 M NaOH at 24.5 degree C in a coffee cup calorim
Brass is a substitution alalloy consisting of a solution of copper and zinc. A particularsample of red barss consisting of 78% Cu and 22.0% Zn by mass has adensity of 8760 Kg/m^3. what would the mol
Lead sulfide, PbS (commonly called galena), has the same formula as ZnS. Does PbS have the same solid structure as ZnS? If different, how are they different?
When Iodine, I2 dissolves in water, whattype of intermolecular forces exist between the I2 and Water? When CaCl2 dissolves in water, what type of intermolecular forces exist between water and the CaCl
A gasmixture contains 1.28 g N2 and 0.85 g O2 in a1.55 L container at 18 ºC. Calculate the mole fraction and partial pressure of each gas component in the gas mixture.
On December 1, 1783 Jacques Charles became the first human to pilot a non-tethered hydrogen balloon. He flew the balloon for fifteen miles and stayed in the air for a total flight time of 45 minutes
Gas cylinder A has a volume fo 48.2 L and contains N2(g)at 8.35 atm at 298 K. Gas cylinder B has an unknown volume and contains He(g) at 9.50 atm and 298 K.
A new temperature scale is proposed based on the melting and boiling points of benzene. Zero on the new scale is the melting point of benzene and 100deg on the new is is boiling point of benzene.
What is the percent error in the calculated density of the solutionif only the pure component densities are available, and it isassumed that the volumes are additive.
If the toralpressure of gas (H2 gas plus water vapour) over water is 1.0 bar,what is the concentration of H2 in the water in grams permililitre?
The koala bear dines exclusively on eucalyptus leaves. Its digestive system detoxifies the eucalyptus oil, a poison toother animals. The chief constituent in eucalyptus oil is asubstance called euca
Commercial grades of stearic acid(C17H35COOH) usually contain some palmiticacid (C15H31COOH) as well. A 1.115-g sample of a commercial -grade stearic acid is dissolved in 50.00 mLbenzene (d = 0.879
A 0.250 g quantity of an acid is titrated with 0.108 MNaOH. It takes 27.22 mL of NaOH to reach the endpoint. What is the equivalent weight of the acid?
Worldwide combustion of methane, CH4 (natural gas),provides about 10.9x10^16 kJ of energy per year. If methane has anenergy content of 39x10^3 kJ/m^3 (at STP), what mass of CO2 is emitted into the a
Calculate the amount of water formed in the resulting reaction. What is the concentration of Hydrogen Ions or HydroxideIons in excess after the reaction is complete?