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The solid calcium carbonate is placed in water. It reaches equilibrium and has a solubility product constant of 4.95 x 10-9. What is the concentration of calcium if the carbonate concentration is raised to 4M?
While cytotoxicity, antiviral activity, and immunosuppressant properties of didemnin-C and of its 8 analogs were excellent to very good, these compounds were, unfortunately, dropped from further studies and development at the stage of human trials..
Compute the hydroxide ion concentration in a NH 3 solution that is 0.091 M and 0.028 M NH 4 Cl. Kb of NH 3 is 1.8 x 10 -5 .
What is the molarity of a solution formed by mixing 20.0 g sulfuric acid with enough water to make 500.0 mL of solution?
A 1-L flask is filled with 1.10g of argon at 25C . A sample of ethane vapor is added to the same flask until the total pressure is 1.25amt .What is the partial pressure of argon, in the flask? What is the partial pressure of ethane in the flask.
A sample of 6.022 g of CH4 is enclosed in a 12 L container at 402 K. What is its pressure in atmospheres
what is the pH of the resulting solution ? (Assume that the volume change does not change upon adding hydroiodic acid) Hypochlorous acid HClO Ka1=3.5x10-8
The solubility of BaSO_4 is 2.4*10^-3 g/L at room temperature. What is the value of K_sp for BaSO_4 at this temperature?
How many kilograms of CaH2 are needed to fill a 134 L tank with compressed H2 gas at 154 atm pressure and 22 degrees celsius?
0.90 of hydrogen chloride () is dissolved in water to make 5.5 of solution. What is the of the resulting hydrochloric acid solution?
An aqueous solution that contains 285ppm of potassium nitrate (KNO3) is being used to feed plants in a garden. What volume of this solution is needed to prepare 1.7 L of a solution that is 97 ppm in KNO3?
The yield of the reaction to form your chalcone is not quantitative. What side products might be formed from your aldol condensation?
How much heat in kilojoules is required to warm 10.0 of ice, initially at -10.0, to steam at 125. The heat capacity of ice is 2.09 and that of steam is 1.84 .
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