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What is the reaction when VO2+ ions are addedto a tenfold excess of sodium sulfite in order to formVO2+ ions? Also why does one need touse a tenfold of reducing agent?
Consider a gaseous binary compound with a molar mass of 62.09g/mol. When 1.39g of this compound is completely burned in excess oxygen, 1.21g of water is formad.
A truck driver used sand to soak up a 1 g spill of lindane(C6H6Cl6). He placed the contaminate soil in an open drum which then filled up with 150 L ofrain water during a rainstorm. You test the wate
A solution of 22.0g CaCl2 in 100.0 cm^3 of water has a vapor pressure of 22.8 torr at 26 celsius. Why does this result supprt the view that CaCl2 is completely ionized to Ca 2+ and Cl - in aqueous s
A portable electric water heater transfers 255 watts (W)of power to 5.5L of water, where 1W=1J/s How much time (in minutes) will it take for the water heater to heat 5.5 L of water from 27 degrees C
Ethylene Oxide(EO) is prepared by the vapor-phase oxidation ofethylene. Its main uses are in the preparation of the antifreezeethylene glycol and in the production of poly(ethyleneterephthalate), wh
Determine the maximum fraction of the unit cell volumethat can be filled by hard spheres in the simple cubic structure. Assume that a is the lattice constant.
The best balances commonly found in laboratories can weight amountsas small as 10-5 g. If you were to count outcarbon atoms at the rate of two per second, how long would it take you to count a pile
2.668 g of a particular metallic alloy, compounded of only Pb andSb, can be quantitatively converted into a 3.101-g mixture of theoxides PbO2 and Sb2O4. What was the percentage (by mass) of antimony
How many grams of water can be heated from 25 degrees C to 100degrees C by the heat released from converting 49.7 g of PbO toPb?
Calculate the energy levels of the network in octatetraene, C8H10,using the particle in the box model. To calculate the box length, assume that the molecule is linear and use the values of 135 pm an
The catalytic site that promotes this reaction (O2 formation from H2O) consists of a cluster of four Mn ions, in a mixture of +3, +4, and possibly +5 oxidation states.
A blimp filled with 5000m3 of helium at20oC and 1.05 bar pressure. The volume of the cabin is30m3 and the mass of the empty blimp structure (nohelium) is 4200kg. What is the maximum additional mass
Light of wavelength 291 nm shines on apiece of magnesium metal. What is the speed of the ejectedelectron? (Light energy greater than that of the work function ofmagnesium ends up as kinetic energy o
Neutrons are used to obtain images of the hydrogen atoms inmolecules. What energy must be imparted to each neutron in aneutron beam to obtain a wavelength of 10.1 pm?
Consider a major oil spill in a lake( a prototyperelated to Alaska Oil Spill few years ago and many subsequentspills). Amount of oil spilled is 5.80 mega gram(Mg). We can assumeoil and water don't m
Why are the formal charges zero? i thought what you did was take the number of valence electrons then subtract the number of bonds the element has..?
Calculate the amount of heat needed to convert 96g of ice at -24 degrees Celcius to water at 28 degrees Celcius. The specific heat capacity of H2O(s) is 2.1 J/(g degrees Celcius).
How much energy (in kilojoules) is released when 14.6 g of steam at 121.0 C is condensed to give liquid water at 67.5 C ? The heat of vaporization of liquid water is 40.67 kj/mol , and the molar hea
She particularly enjoys pickling and decides to pickle olivesover a leisurely weekend. According to the recipe, she needs to addthree teaspoons of salt to one cup of diced olives.
If you have a mixture of 10 lb. sunflower seeds whichcost 32 cents per pound and 16 lb of cracked corn whic cost 18cents per pound, how much will this mixture cost perpound.
The energy levels the electron can occupy in theHe+ ion can be calculated using the energy levelequation. Calculate the energy in kJ/mol of the electron when it isin the n= 5.00 level.
Explain why some molecules are best represendted by resonance structures, and how these structures indicate the actual structure of the molecule.
A bottle of concentrated aqueous sulfuric acid, labeled 98wt% H2SO4 (MW 98 g/mol), has a concentration of 18.0 M. How many mL of this reagent should be diluted to 1 L to give a1M H2SO4?
What is the molarity, molality, weight percent and ppm of NaCl(MW=58.4 g/mol) when 100g of this compound is dissolved in 500mL of water such that the density of the final solution is 1.16 g/mL?Assum