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A 50/50 (by mole) mixture of He and O2 gas is held over a container of water. If the total pressure of the gas mixture is 10.2 atm, what is the concentration of dissolved He in the water?
Lead(II) sulfide was once used in glazing earthenware. It will also react with hydrogen peroxide (H2O2)to form lead(II) sulfate and water. How many grams of hydrogen peroxide are needed to react completely with 265 g of lead(II) sulfide?
How many electrons are transferred in the following oxidation-reduction reaction?
a 155 gram sample of copper was heated to 150 degrees Celsius then placed into 250 gram of water at 19.8 degrees Celsius. Calculate the final temperature of the mixture.
What is the freezing point of a 28.6% (by mass) aqueous solution of HCl? Assume the HCl is 100% ionized.
Compare the percent ionization of the base in (a) with the percent ionization of the base in (b).
The vapor pressure of water is 28.3 torr at 29°C then determine what is the partial pressure of oxygen collected if a reaction at that temperature produces Carbon Dioxide which is collected over water at a total pressure of 576 torr, ?
certain temperature and pressure, one liter of CO2 gas weighs 1.85 g. What is the mass of one liter of CH4 gas at the same temperature and pressure?
How many equivalent Lewis structures are necessary to describe the bonding in NO2F ?
How much heat is evolved when 9.07 x 105 g of ammonia is produced according to the following equation:
The volume of the gas is measured 201 mL at .989 atm. compute the number of grams of Na used in the reaction if Vapor pressure of water = 0.0277 atm
Half-life equation for first-order reactions: where is the half-life in seconds , and is the rate constant in inverse seconds . Part A What is the half-life of a first-order reaction with a rate constant
A nurse is asked to deliver morphine bt IV to a patient at a rate of 20 mg every four hours. The concentration in the IV bag is given as 0.13%. How many milliliters
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