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State which atom has a smaller first ionization energy according to periodic trends. Explain the difference in ionization energy for the pairs.
Determine the ionic strength, µ, for each of the following solutions. Assume complete dissociation of each salt and ignore any hydrolysis reactions.
Standard potentials are measured against the standard hydrogen electrode (S.H.E.). Because it is not always convenient to use a S.H.E.
At 25 °C, you conduct a titration of 15.00 mL of a 0.0480 M AgNO3 solution with a 0.0240 M NaI solution within the following cell: Saturated Calomel Electrode
Use the standard enthalpies of formation to calculate delta H for the reaction of ammonia and hypochlorite shown above: delta H formation (NH3(aq))
Consider a kinetic study of oxidation of a new plastic stabiliser being proposed for the automobile industry.
Explain how the temperature difference between the poles and the equator drives the motion of the oceans and atmosphere.
If the heat was increased would more or less work be done or would the system be unaffected?
Burning 2.00g of propane, C3H8, produces 99.78 kJ of energy. How much energy is produced when a mole of the propane burns?
A compound contains carbon, hydrogen, and oxygen. A 10 g sample is analyzed for carbon and hydrogen. It contains 1.315 g hydrogen and 5.213 g carbon.
What is the amount of Cu (in grams) necessary to precipitate 0.50 g of Ag in the presence of excess AgNO3?
What is the molarity of a solution made by dissolving 25.6 g of KOH (5601 g/mol) in enough water to make 3.00 L of solution?
The element Europium exists in nature as two isotopes: 151Eu has a mass of 150.9196 amu, and 153Eu has a mass of 152.9209 amu.
The thallium (present as Tl2SO4) in a 7.80-g pesticide sample was precipitated as thallium(I)iodide. Calculate the mass percent of Tl2SO4 in the sample.
A sample of a mixture containing only sodium chloride and potassium chloride has a mass of 3.5650g.
Dry air near sea level has the following composition by volume: N_2, 78.08%; O_2 20.94%; Ar, 0.93%; CO_2 0.05%. the atmospheric pressure is 1.00 atm.
A titration of 0.100 M Cl^- with 0.100 M Ag^+ used an end point where silver chromate gives an orange precipitate.
Imagine that we give N2(+), O2(+) and (NO)+ ions the same velocity of 30.0 km/s and then send them into a mass spectrometer where the magnetic field.
A solvent called "mixed xylenes" contains the o-xylene, m-xylene, p-xylene and ethyl benzene.
After the reaction of the slag (solid residue) was analyzed. It contained 3.8 % Carbon, 5.8 % Phosprorus, and 26.6 % Calcium by mass.
If a 25gm sample of calcium carbonate is added to a 75.5 ml HCl (density = 1.125gm/cm3, 26% HCl by mass), calculate the molarity of the HCL
A cylindrical bar of gold that is 1.5 in. high and 0.25 in. in diameter has a mass of 23.1987g, as determined on an analytical balance.
Calculate the sodium ion concentration when 60.0 mL of 6.0 M sodium carbonate is added to 30.0 mL of 1.0 M sodium bicarbonate.
If the sun which is 93,000,000 miles away away from Earth was to go out, how long would it take for us to know that this had happened?
What is the molarity of a solution formed from 20.0 grams of NaCl dissolved in 650.0 mL of H2O?