Finding out the initial concentration
A zero-order reaction has a constant rate of 3.50×10-4 . If after 40.0 seconds the concentration has dropped to 6.50×10-2, what was the initial concentration?
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A 1.20 gram sample of dry ice is added to a 755mL flask containing nitrogen gas at a temperature of 25.0 degrees Celsius and a pressure of 725 mmHg.
A 14.0-g sample of CaCl2 is dissolved in 112 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the surroundings and assuming the solution has a specific heat capacity of 4.18 J
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You develop the plate using carbon tetrachloride, CCl4. Which of the 4 substances should have the largest Rf value? Which the smallest? Explain why.
A saturated solution contains 167 g AgClO4 in 30 ml of water in 25 C. What is the solubility in g solute/(100 g H20)? Calculate the mole fraction of solute at this temperature.
Which of the following reaction mechanisms proceeds with inversion of configuration at a stereogenic center?
A gas is collected over water at a certain temperature. The total pressure is 762 torr. The vapor pressure of water at this temperature is 17 torr. what is the partial pressure of gas collected ?
If 15.0g of a gas dissolves in 1.00 L of water at 110kPa,what mass will dissolve at 101.325kPa?The solubility of an unknown gas is 1.20 g/L at 1.00 atm. What is the solubility of the gas at 1.52 atm?
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