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Calculate the molar mass of a gas that has a density of 0.232 g/L at 156 oC and 222 torr. Use R = 0.0821 L-atm/mol-K for the value of the gas constant.
An ice cube of 15.1 grams is placed into 304 grams of H 2 O. compute the change in temperature in the H 2 O upon completing melting of the ice.
A flask contains 0.260 mol of liquid bromine, Br_2. Determine the number of bromine molecules present in the flask.
Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.022 moles of sulfuric acid is mixed with water to make 607 mililiter of solution, what is the molarity of H+.
Draw the Lewis structure for the PO4-3 ion, indicating any resonance forms. On the basis of electron configurations, predict the formula of the Type I ionic compound formed from the elements Z=49 and Z=51.
How many grams of NH4Cl must be added to 424 mL of a 0.69 M solution of NH3 to prepare a pH = 9.00 buffer.
A soluation of HO-CH2-CH2-OH is prepared by dissolving 651g of ethylene gylcol in 1.50kg of water. Determine the freezing point of the soluaiton and the vapor pressure of water above the solution 25.0 degrees C.
Consider the reaction CuSO4(s) ! CuO(s) + SO3(g) . If G? = -14.6 kJ at 950?C for this reaction, calculate G for an SO3(g) pressure of 50 bar at this temperature.
A woman requires taking ibuprofen twice daily in 625mg amount. Each pill in the bottle is 250 mg then determine the number of pills the woman requires to consume each time she needs 625mg dosage
CO (5.00 g) and CO2 (5.00 g) were placed in a 750.0 mL container at 50.0 °C. Calculate the total pressure in the container.
an auto mechanic spills 85 mL of 2.6 M H2SO4 solution from a rebuilt auto battery. How many milliliters of 2.5 M NaHCO3 must be poured on te spill to react completely with the sulfuric acid.
What is the molarity (M) of a solution that contains 2.08 grams of NaOH (MM = 40.00 g/mol) in 79.65 mL of solution.
Cesium(Cs) is used extensively in television cameras and in photocells because it has lowest ionization energy of all the stable elements.Determine the maximum kinetic energy of a photo electron ejected from cesium.
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