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Excess aqueous Hydrochloric acid was added to a 0.415 gram sample of an alloy of aluminum and copper.the aluminum dissolved, evolving hydrogen gas, while the copper, remained inert. 436 ml of gaseous hydrogen was collected over water at 24.6 degrees celsius and 746.6 torr. what is the weight percent of aluminum in the alloy?
Suppose that the volume of a particular sample of Cl2 gas is 8.7 L at 895 torr and 24 degrees Celsius. How many grams of Cl2 are there in the sample.
Because the potential of pH electrodes can vary, it is necessary to CALIBRATE a pH electrode before use. For many uses, a two-point calibration procedure is appropriate.
Write the set of 4 quantum numbers for the following: a. The 29th electron of Ga b. The 55th electron of Cs c. The last electron of Pb i will rate these later when I finish looking through the responses
if a 2.5 L of Hydrogen is collected over water at 40C and 767 mmHg, what is the volume of dry gas at standard conditions, The vapor pressure of water is 55.3 mmhg at 40 C
The following reaction is exothermic (H= -226 kJ) and has a rate law: Rate = k(NO2)^2: NO2 + CO ? NO (g) + CO2 (g) for each of the following disturbances, indicate whether the rate of the reaction will be FASTER or SLOWER and indicate whether ther..
What is the pH at the equivalence point? (Kb of NH3 = 1.8 A 20.0 mL sample of 0.20 M sodium acetate is titrated with 0.11 M HCl(aq). What is the pH after the addition of 50.0 mL HCl(aq)?
Choose all of the processes from below which describe changes which are independent of the path by which the change occurs. the elevation increase experienced by a traveller travelling from Grand Isle, LA to Denver, Colorado
During an extraction a student loses track of which layer is the organic layer. How could she determine which layer is the aqueous phase?
4- A student measured the diameter of a sphere and determined the average value. His measyrements are 5.17cm , 5.16 cm cm and 5.17 cm if the diameter is 6.18cm what can be said about the student's results
If a sample containing 2.03 mL of nitroglycerine (density = 1.592 g/mL) is detonated, how many total moles of gas are produced?
consider the following equilibrium process at 686degcco2g h2g cog h2ogthe equilibrium concentrations of the reacting
Assume the radius of a neutron to be approximately 1.0; times ;10^{ - 13} {rm cm}, and calculate the density of a neutron. [Hint: For a sphere V = (4/3)pi r^3.]
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