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Radon is produced in a decay series of uranuim. Write the balanced nuclear equations for the decay processthat gives rise to radon-222 and the two decay processes follwoing that.
A 4.000 g sample of an unknown metal, M, was completely burned in excess O2 to yield 0.02225 mol of the metal oxide, M2O3. What is the metal?
Which metal is associated with the synthesis of cyclopropanes?
A cylinder, with a piston pressing down with a constant pressure, is filled with 2.00 of a gas (), and its volume is 42.0 (). If 0.500 of gas leak out, and the pressure and temperature remain the same, what is the final volume of the gas inside th..
A solution is prepared by mixing 20.0 mL of 0.025 M BaCl2 and 200. mL of 0.075 M K2SO4. What are the concentrations of barium and sulfate ions in this solution. Assume only SO42- ions (no HSO4? ) are present.
2H2O (l)>2H2 (g)+ O2. How many moles of H2O are required to form 1.6L of O2 at a temperature of 325K and a pressure of 0.990 atm
A metal was heat up in hot water and then put into a Styrofoam cup of water at room temperature. the specific heat was calculated.
What mass of Ar gas (in g) is contained in a 6.40 L tank in which its pressure is 0.703 atm and the temperature is 64.0°C? Do not enter units.
The vapor pressure of pure CH2Cl2 (with molecular weight 85 g/mol) is 133 torr at 0?C and the vapor pressure of pure CH2Br2 (with molecular weight 174 g/mol) is 11 torr at the same temperature.
Write the reaction equation for acid-base equilibrium between hypochlorous acid and hypochlorite ion.
How many grams of water can be cooled from 34°C to 26°C by the evaporation of 81 g of water? (The heat of vaporization of water in this temperature range is 2.4 kJ/g. The specific heat of water is 4.18 J/g·K.)
A certain reaction has an activation energy of 57.42 kJ/mol. At what kelvin temperature will the reaction proceed 3.50 times faster than it did at 353 K
Caffeine (c8h10n8o2) is a stimulant found in coffee and tea . A solution of caffeine in chloroform (CHCl3) as a solvent has a concentration of 7.60×10-2.
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