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which of the following compounds is expected to have the strongest ionic bonds. a) RbF b) NaF c) NaI d) CsBr e) CsI
You transfer a gas at 25oC from a volume of 2.49 L and 0.950 atm to a vessel at 32oC which has a volume of 8.75 L. What is the new pressure of the gas
A 15.0 mL sample of an acid requires 37.3 mL of 0.303N NaOH for neutralization. Calculate the normality of the acid.
This procedure is potentially very lucrative because, after an initial extraction of energy from the groin, no fossil fuels would be required to keep the device running indefinitely. Would you inves
What is the normality formula. What is the normality of: a) 0.45M Al(OH)3 b) 0.122M H2SO4 c) 0.675M H3PO4
Aqueous silver nitrate was then added to precipitate the Cl- and Br- ions as AgCl and AgBr. The mass of silver halides obtained was 0.9974 g. What are the molarities of HCl and HBr in the original s
The label on a bottle of concentrated HCl says the contents are 36% HCl by mass and have a density of 1.179 g/mL. What is the Molarity of the Conc. HCl.
A 1.00 L flask at 298 K contains a mixture of Kr and N2 with a total pressure of 0.940 atm. If the mole fraction of Kr is 0.455, what is the mass fraction of Kr
Titration of a 20.00 mL sample of a monoprotic weak acid requires 9.86 mL of 0.04899 M NaOH to reach the equivalence point. What is the concentration of the weak acid
A mixture of NaBr and NaI has a mass of 1.620 g. When treated with excess AgNO3, it yields a mixture of AgBr and AgI which has a mass of 2.822 g. What mass of NaI was present in the original mixture
A compound composed of elements X and Y is 1/3X by mass. The atomic mass of element X is 1/4 the atomic mass of element Y. Find the empirical formula.
Molecular chlorine, Cl2, is a green gas. Sketch a few of the rotational, vibrational, and electronic energy levels of Cl2 on the same diagram to relative scale.
A 50-lb weight hangs from a string. Find the tensions T1 at 50 degrees and T2 at 30 degrees in the string, and write these vectors in terms of the vectors i and j
calculate the volume of 1.420 M NaOH required to titrate 38.70 ml of a 1.50 M H3PO4 solution
Titanium is a strong, lightweight, corrosion-resistant metal that is used in rockets, jet engines, and bicycle grams. It is prepared by the reaction of titanium (IV) chloride with molten magnesium b
Calculate the potential energy of interaction between the two electrons in the helium atom when they are separated by a distance of 1 Å. Similarly, what would be the potential energy of one of
A 2.5 L helium balloon is filled at a florist's shop. If the temperature inside the shop is 68°F, what volume will the helium occupy after being left in an automobile at ?5°F in the parking
Caffeine crystals always contain at least one molecule of water per caffeine molecule. Draw chemical structures to explain why a water molecule might be essential to producing a stable crystal of ca
A gas mixture contains 75.2% nitrogen and 24.8% krypton by mass. What is the partial pressure of krypton in the mixture if the total pressure is 884mm Hg
The density of hexa-fluorobenzene is 1.61 g/ml. If you mix dichloromethane, water and hexafluorobenzene together how many layers will there be and what will their positions be
A 2.5 L helium balloon is filled at a florist's shop. If the temperature inside the shop is 68°F, what volume will the helium occupy after being left in an automobile at 5°F in the parking l
A solution containing 0.2 g/mL of a pure R enantiomer in a 1 dm polarimeter rotates plane polarized light by +3?. What is the specific rotation of the R isomer. What will be the specific rotation of
Consider a solution that contains 73.0% R isomer and 27.0% S isomer. If the observed specific rotation of the mixture is -87.0°, what is the specific rotation of the pure R isomer
If the photosynthesis portion of the carbon cycle represents the world's capacity for generating biofuels (in addition to supplying food) what percentage of the world's biomass production would be n
Current annual energy consumption in the United States is 99.2 quads. Assume that all this energy is to be generated by burning CH4(g) in the form of natural gas. If the combustion of the were compl