Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
Calculate the number of moles of hydrogen gas that are present at equilibrium if a mixture of 0.300 moles of carbon monoxide and 0.300 moles of water vapor are heated to 700 degrees Celcius in a 10.
Osmium (Os) is the densest element known (density = 22.57 g/cm3). Calculate the mass in pounds and in kilograms of an Os sphere 37 cm in diameter (about the size of a grapefruit).
A 0.21 m3 drum contains 100 L of a mixture of several degreasing solvents in water. The concentration of trichoroethylene in the headspace (gas phase) above the water was measured to be 0.00301 atm.
A chemical is placed in a beaker containing 20 g of soil and 500 mL of water. At equilibrium, the chemical is found in the soil ast a concentration of 100 mg . kg-1 of soil. The equilibrium concentr
One mole of and ideal moatomic gas, initially at STP, is adiabatically expanded into a vacuum. Calculate the temperature of the expanding gas. b.
An element crystallizes in a body-centered cubic lattice. The edge of the unit cell is 2.69 , and the density of the crystal is 7.92 g/cm3. Calculate the atomic weight of the element.
Consider how to reduce water turbidity in a water treatment plant. The plant's design flow is 6 MGD (million gallons per day). The minimum detention time is 4 hours to get adequate settling; 4 hours
How much silver is plated from a solution of silver nitrate by a 2.00 A current that deposits 0.250 mol of copper from a solution of copper(II) nitrate?
A 1.00 L flask was filled with 2.00 mol gaseous sulfur dioxide and 2.00 mol gaseous nitrogen dioxide and heated. After equilibrium was reached, it was found that 1.30 mol gaseous nitrogen monoxide (
The common Eastern mole, a mammal, typically has a mass of 69 g, which corresponds to about 6.9 moles of atoms. (A mole of atoms is 6.02 x 1023 atoms. In atomic mass units (u), what is the average
Ethylene glycol is used as automobile antifreeze. 6.38 g of this compound contains 2.47 g of carbon and 0.620 g of hydrogen. The rest is oxygen. The molar mass is 62.0g/mole.
Assuming an E coli cell is a cylinder 2 micrometers long and 1 micrometer in diameter and that many proteins in an E coli cell are present at a concentration of 2 molecules per cell.
A concentration of 8.00 x 10^2 ppm by volume of carbon monoxide is considered lethal to humans. Calculate the volume in Liters occupied by CO in a room that measures 17.6m long by 8.80m wide by 2.64
If the consistency of the product stream needed to one half of what it is presently, how much 0.5% consistency fiber-water solid stream must be added in lbm/min?
Suppose that a coal-fired power plant converts energy from coal into electrical energy with 36 percent efficiency. How many kilojoules of energy from coal are needed to produce 1.0 jk of electrical
A vessel of volume 22.44 dm^3 contains 2.0 mol h2 and 1.0 mole of N2 at 273.15 K initially. All the H2 reacted with sufficient N2 to form NH3.
A river had a depth of 1 m, a width of 40m, and a flow of 20 m^3/sec. Assume that the wind speed at 10 m elevation is 4 m/sec. What is the overall mass-transfer coefficient for oxygen from the atmo
What refinements had to be made in Dalton's atomic theory to account for Gay-Lussac's results on the combining volume of gasses?
The first reaction in glycolysis is the phosphorylation of glucose:Pi+glucose gives glucose-6-phosphate.This is thermodynamically unfavourable process, with change of free energy=+1kj/mol.
What's the difference between physical/chemical change and physical/chemical property? How is energy involved in chemical and physical changes?
What is the terminal settling velocity for a particle with a diameter of 1 mm and a density of 2.5 g/cm^3 suspended in water at 20 degrees C?
The flow of Florida Current through the straights between Key West and Cub is 150 x 10^6m^3/sec. The mass concentration of salt in seawater is about 35 ppt (o/oo). What is the flux of salt in the F
A gaseous mixture consists of 80.0 mole percent N2 and 20.0 mole percent 02. Suppose water is saturated with the gas mixture at 25 c and 1 atm total pressure, and then the gas is expelled from the w
A sample of a gas occupies 1.40 x 103 mL at 25oC and 760 mmHg. What volume will it occupy at the same temperature and 380 mmHg?
If a photon moves from n=4 to n=1, what is the energy production? is it gained or lost? what is the wavelength that goes with this energy?