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If the decay of trihalomethane is first order,and 90% of the trihalomethanes in glass of tap water are gone after 3 hours,what is the decay rate constant?
A 24 L sample of a gas at fixed mass and constant temperature exerts a pressure of 3.0 atm. What pressure will the gas exert if the volume is changed to 16 L?
compressed gas cylinder contains 1.00 x 103 g of argon gas. The pressure inside the cylinder is 2050 psi at a temperature of 18oC. How much gas remains in the cylinder if the pressure is decreased to 650psi at a temperature of 26oC?
N2 + 3H2 --> 2NH3 what volume of hydrogen is necessary to react with five liters of nitrogen to produce ammonia?
The reactant concentration in a second-order reaction was 0.410 M after 190s and 1.60×10^?2 M after 820s . What is the rate constant for this reaction
It is well known that the element magnesium has three naturally occurring isotopes. Mg-24 represents 79.0% of all magnesium atoms, Mg-25 accounts for 10.0%, and Mg-26 is the remaining 11.0%.
what is the boiling-point change for a solution containing 0.360 mol of naphthalene (a nonvolatile, nonionizing compound) in 256.0 g of liquid benzene? (Kb=2.53 celsius/m for benzene).
Nickel nitrate and potassium carbonate react to form nickel carbonate and potassium nitrate. How many milliliters of 0.55M Ni(NO3)¬2 are needed to react with 85 mL of 0.25M K2CO3? First, write a balanced equation.
If 205 grams of water at 31C absorbs 281kJ of heat from a mountain climber's stove at an elevation where the boiling point of water is 89C, is this amount of energy sufficient to heat
At 25ºC the solubility product constant, Ksp, for magnesium phosphate, Mg3(PO4)2, is 1.0´10-24. The solubility product constant for magnesium fluoride, MgF2, is 7.0´10-11.
In the decomposition of hydrogen peroxide, the percentage yield of oxygen is 93%. What is the actual yield in grams of oxygen if you start with 100 grams of H2O2.
Calculate the pressure and composition of air 100 miles above the surface of the earth assuming that the atmosphere has a temperature of 0 celsius independent of altitude. The correct answer is 3.27 X 10^-9 bar; yO2=0.015, yN2=0.985 but I don't kn..
a solution is prepared by dissolving 396 grams of sucrose in 624 grams of water. what is the vapor pressure of this solution at 30 degrees celsius.
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