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The acid equilibrim constant (k) for benzoic acid is 6.46 X 10 ^5. Note that this calculatio doesn't account for the benzoic acid that has precipitated from solution, but you can assume that the hig
If one-third the resulting carbon dioxide remained in the atmosphere, what would be the annual rate of increase in atmospheric carbon dioxide around the year 2020? Assume that the fuels are 75% carb
How many minutes does it take light from the sun to reach the Earth? (The distance from the sun to Earth is 93 million mi; the speed of light is 3.00 x 10to the 8th power m/s.)
The product gas from a solid fuel combustion reaction has the following dry-basis molar composition: 72.0% CO2, 2.57% CO, .0592% SO2, and 25.4% O2
Suppose that 0.90 grams of water condenses on a 75.0 grams of block of iron that is initially at 20 degrees celcius. The heat released during condensation goes only to warming the iron block, what i
If initially .30 mol of Br2 and .30 mol Cl2 are introduced into a 1.0 L container at 400. K, what will be the equilibrium concentration of BrCl? Assume the initial product concentration is zero.
A sample of propane (c3h8) is placed in a closed vessel together with an amount of O2 that is 2.50 times the amount needed to completely oxidize the propane to CO2 and h20 at constant temperature.
An antacid tablet from Brand A is broken in half. One of the pieces weighs 0.56g. This piece is stirred with water and 4 drops of phenolphthalein. Two burets are set up.
Not all element names come from english or latin words. the sysmbol for tungsten is W from the german word wolfram. the symbol for mercury is Hg from the greek word hydragyrum.
A sample of tap water consists of water, fluoride ions, calcium ions, and several other dissolved ions. The ions are evenly distributed throughout the water.
How many unpaired electrons are in an atom in the ground state, assuming that all other subshells are either completely full or empty, if its outermost p subshell contains a) 3 electron B)5 electro
If you take a 10.0 mL portion of the stock solution and dilute it to a total volume of .500 L, what will be the concentration of the final solution?
If a 200mg piece of gold (density =19.32g/cm^3 ) is hammered into a sheet measuring 2.2 X 1.0 ft , what is the average thickness of the sheet in meters? Express your answer using two significant fi
Calculate the volume of propylene glycol, in gallons, needed to produce the same antifreeze protection as 5.00 of ethylene glycol.
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.
The miners trapped in the San Jose copper mine in Chile are 700 meters below ground. Calculate the work needed to raise one 70 kg miner to the earth's surface, assuming the acceleration due to gravi
A vessel contains 0.90 g liq H2O in equilibrium with water vapor at 30C. At this temperature, the vapor pressure of H2O is 31.82 torr. What volume increase is necessary for all the water to evapora
At ordinary body temperature (37 degrees Celsius) the solubility of N2 in water in contact with air at ordinary atmospheric pressure (1.0 atm) is 0.015 g/L. Air is approximately 78 mol % N2.
Why should samples be tightly packed in capillary tubes ( to find melting points ) and what are 2 problems with performing MP with wet product?
A specific brand of gourmet chocolate candy contains 7.00g of dietary fat in each 22.7-g piece. How many kilograms of dietary fat are in a box containing 2.00lb of candy?
A sealed flask with a capacity of 1.00 dm3 contains 7.55 g of carbon dioxide. The flask is so weak that it will burst if the pressure exceeds 9.500 X 105 Pa.
Look up the solubility properties of caffeine and determine how many grams of caffeine will dissolve 100 g of water at 100 *C. Show your calculation.
To obtain the same antifreeze protection requires 76 of propylene glycol to replace each 62 of ethylene glycol. Calculate the mass of propylene glycol required to replace 10.0 of ethylene glycol.
A specific brand of gourmet chocolate candy contains 7.00 g of dietary fat in each 22.7-g piece. How many kilograms of dietary fat are in a box containing 4.00 lb of candy?
1 mole of an ideal monatomic gas at STP experiences a reversible process in which volume is doubled. The nature of the process is unspecified but q = 1662.8 J. deltaH = 2078.5 J.