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When strongly heated, magnesium sulfide formed a crystalline deposit on the walls of a sealed reaction vessel. Metallic deposits were found on the bottom of the container. what is the equation and
A solution is made up by dissolving 73 g of glucose in 966 g of water. Calculate the activity coefficient of glucose in this solution if the solution freezes at -.66 degrees C.
A zero-order reaction has a constant rate of 1.20×10-4 . If after 80.0 seconds the concentration has dropped to 7.00×10-2 , what was the initial concentration?
By referring to the figure , determine the mass of each of the following salts required to form a saturated solution in 250 g of water at 30 degrees C: a)KClO3, Pb(NO3)2, c) Ce2(SO4)3
Reacting 931 mol of SiO2 with excess carbon yields 29.6 kg of SiC. What is the percentage yield
Assuming that the other salts present in seawater are in negligible amounts, determine the pressure that must be exerted on seawater to desalinate it using reverse osmosis at 25oC.
A 0.50 mol sample of oxygen gas is confined a 0° C in a cylinder. The initial pressure in the cylinder is 1.0 atm. If the gas is compressed by a piston so that the final volume is 57.3% of the
Calculate the change in pH caused by adding 10.0 mL of 2.24-M HCl to 370. mL of each of the following solutions. a]Water b]0.14M C2H3O2^1- c]0.14M HC2H3O2 d] a butter solution of 0.14 M in each C2H
What function of acetic acid in rection to yield acetanilide? can it be changed to another acid?
A 0.374g sample of a metallic element, M, is completely dissolved in 100ml of 0.500N sulfuric acid. The liberated hydrogen occupied a volume of 320ml when collected over water at 25 degrees celcius
Tablets of KI were distributed to people living around Chernobyl one week after the nuclear reactor explosion occurred, to help flush radioactive 131I isotope out of their bodies. 131I has a half-li
What is the first step in drawing the Lewis structure for a molecule or ion
If a 2.6 reaction vessel initially contains 725 of cyclopropane at 485 , how long will it take for the partial pressure of cylclopropane to drop to below 105 ?
A wastewater contains 8.1 mg/L phosphate ions and is treated with an 18 mg/L alum solution. Calculate the mass of inorganic sludge (aluminum precipitates) produced in one day in a plant treating 22
What total volume of gas measured at 29°C and 774 torr, is produced when 1.05 g of NaHCO3(s) is completely converted to Na2CO3(s)?
A gaseous mixture of O2 and Kr has a density of 1.102 g/L at 420 torr and 300. K. What is the mole percent O2 in the mixture?
A large flask with a volume of 936 mL is evacuated and found to have a mass of 134.66g. It is then filled to a pressure of 0.967atm at 31 degrees C with a gas of unknown molar mass and then reweighe
What are some of the advantages and disadvantages of this type of solar-thermal "power"?
Hydrogen peroxide usually comes commercially as a 30% (w/v) aqueous solution, with a density of 1.106 g/ml. calculate the volume of the 30% solution one would need to make 50 ml of 4.0 M H2O2 solut
What is the symbol equation for incomplete combustion of ethane and what is the symbol equation for the complete combustion of ethane?
Calculate the number of grams of propane (C3H8) required to heat all of the water in a 50-gallon hot-water tank from 23.4 degrees C to 65.0 degrees C if the water tank itself has a heat capacity of
At 30 km above the surface of the earth, the temperature is about 230. K, and the partial pressure of oxygen is about 1.0x10^-3 atm. Estimate the partial pressure of ozone in equilibrium with oxyge
A sample of sodium reacts completely with 0.213 of chlorine, forming 351 of sodium chloride. What mass of sodium reacted?
The recommended adult dose of Elixophyllin, a drug used to treat asthma, is 6 of body mass. Calculate the dose in milligrams for a 195 person.