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It contains 57.8 percent C, 3.64 percent H, and 38.5 percent O. The molar mass is known to be approximately 166 g/mol. What is the molecular formula of terephthalic acid?
A zero-order reaction has a constant rate of 3.40×10-4 . If after 45.0 seconds the concentration has dropped to 3.50×10-2 , what was the initial concentration?
The container is 28.3cm higher than the level in the arm open to the atmosphere, and the atmospheric pressure reading outside the apparatus is 1.021 atm?
Determine the Kelvin temperature required for a 0.0470 mol of gas to fill a balloon to 1.20 L under 0.988 atm of pressure.
Suppose 5.0 mol of antimony (III)fluoride is added to 10.0 mil of carbon tetrachloride. How many grams CCl2F2 and SbCl3 are there if the reaction is 100% complete?
0.90 g of hydrogen chloride (HCl) is dissolved in water to make 2.5 L of solution. What is the pH of the resulting hydrochloric acid solution?
Carbon disulfide burns with oxygen to form carbon dioxide and sulfur dioxide in the following manner:
Calculate the Calorimeter Constant if 25 g of water at 60C was added to 25 g of water at 25C with a resulting temperature of 35C?
When mixed together as descripbed in the procedure, the intensity of the FeSCN 2+ absorbance will be less than half the original intensity. Explain why.
a solution is prepared by dissolving 20.0 g of NaI in enoug water to make 300 mL of solution How many moles of ions are in 25.0 mL of the solution?
A solution is prepared by adding 80.0 mL of 0.090 M HBr to 130.0 mL of 0.50 M HI. Calculate the concentrations of all species in this solution. HBr and HI are both considered strong acids.
sodium-24 is a radioistope with half life of 15 hors. A sample of pure sodium-24 has an inital mas of 400.0g. what mass of sodium-24 remains after 60 hours?
After the reaction, the volume of the system was 2.20 L. Calculate the total internal energy change, , in kilojoules.
Calculate the concentration of CO (ppm) in the stack gas.
Calculate the final temperature when a 20.4 gram sample of ice at 0oC is placed into a styrofoam cup containing 111 grams of water at 72.7 oC.
The addition of 6 g of salt to a sample of pure water causes its freezing point to be reduced from 0°C to -1.5°C. After an additional amount of salt is dissolved in the solution, its freezin
Cadmium ion in solution is analyzed by precipitation as the sulfide, a yellow compound used as a pigment in everything from artists' oil paints to glass and rubber. Calculate the molar solubility of
Carbon dioxide at 223°C and 45 atm flows into the reactor at a rate of 600. L/min. What mass of urea is produced per minute by this reaction assuming 100% yield? Find _____g/min
The balanced equation for a reaction in the process of the reduction of iron ore to the metal is shown below. Fe2O3(s) + 3 CO(g) 2 Fe(s) + 3 CO2(g) (a) What is the maximum mass of iron, in grams, that
What mass of this substance must evaporate in order to freeze 250 of water initially at 19? (The heat of fusion of water is 334 the specific heat of water is 4.18 .)
When 284.5 g of ethylene (C2H4) burns in oxygen to give carbon dioxide and water, how many grams of CO2 are formed?
What is the molar concentration of a H3PO3 solution if 150.00 mL of the solution was required to neutralize 75.00 mL of NaOH whose concentration was 1.50 molar?
To what volume will the gases expand against a constant pressure of 640. torr if all the energy of combustion is converted into work to push back the piston?
The solubility of O2 (g), in water at 25°C is 3.16 mL/100 g H2O when the gas pressure is maintained at 1 atm. What pressure of O2 (g) would be required to produce a saturated solution containing