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Describe the bonding in SeO2 in valence bond terms. Note whether or not there is delocalized bonding and explain how molecular orbital theory can be useful here.
Write the chemical reactions for the steps typically used to isolate titanium metal from titanium dioxide. What is the oxidation number for titanium in each step of the reaction?
What type of mineral source (sulfide, oxide, halide, phosphate, silicate, carbonate, etc) are the following elements typically isolated from? Write the chemical formula for the source mineral (for e
a photon has a wave lenght of 501 nm . calculate the energy of the photon in joules . enter your answer in scientific notation
The energy of a photon is 9.61 x 10 ^ -20 J . What is its wavelenght( in nanometers)? Enter your answer in scientific notation
The approximate distance between mars and earth is about 1.29 x 10^8 miles. How many seconds would it take for TV pictures transmitted from the viking space vehicle on mar's surface to reach earth ?
Splitting patterns and integrations may be used more than once, or not at all, as needed. Likewise, some bins might remain blank. Note that peak heights are arbitrary and do not indicate proton inte
Calculate the mass of ammonium chloride that must be added to 500.0 mL of 0.32 M NH3 to prepare a pH 8.50 buffer; Kb for NH3 is 1.8 × 10-5.
The acid ionization constant of Fe(H2O)62+(aq) is 3E-6. Compute the pH of a 0.2 M aqueous solution of Fe(NO3)2. 5. Compute the solubility of Mg(OH)2 in a buffer solution at pH=10.31. The solubility p
Samples of the following volatile liquids are opened simultaneously at one end of a room. If you ate standing at the opposite end of the room, list the following species in order you would smell the
A 1.07g sample of a noble gas occupies a volume of 363mL at 35C and 678mmHg. Indentifythe noble gas in this sample
For the molecule shown below, choose all the statements that are true. Soluble is where at least 10 drops of the compound can be added to a particular solvent (in this case, water or hexane -- CH3CH
The valve connecting a 2.93 L bulb containing a oxygen gas at a pressure of 2.94atm, and a 9.27 L bulb containing carbon dioxide gas at a pressure of 4.52 atm
How many milliliters of 0.200 M FeCl3 are needed to react with an excess of Na2S to produce 1.38 g of Fe2S3 if the percent yield for the reaction is 65.0%? 3 Na2S(aq) + 2 FeCl3(aq) ? Fe2S3(s) + 6 Na
the equivalence point occured at 4.67 mL of HCl. Calculate the pH at 0.00 mL of added HCl and at 2.00 mL of added HCL
what is the partial pressure of nitrogen in a container that contains 3.96mol of oxygen , 7.49 mol of nitrogen and 1.19 mol of carbon dioxide when the total pressure is 563 mmHg?
calculate the percent yield based upon the amount of maleic anhydride used. use the molecular weight of one repeating monomer unit for the weight of the product.
When 280. mL of 1.50× 10-4 M hydrochloric acid is added to 125 mL of 1.75 × 10-4 M Mg(OH)2, the resulting solution will be
a sample of neon gas collected at STP occupies a volume of 18.8 L . How many moles of gas does the sample contain?
Consider the brilliant blue spectrum (blue 1) shown here. What is the wavelength of maxmal absorbance in nm? (Do not include units in your answer: number only)
Given a stock solution of a food dye having a concentration of 1.0 x 10-5 and an absorbance of 0.700. If a new solution is made by diluting exactly 10.0 mL of the solution with exactly 44.4 mL of di
A 2.00 L glass soda bottle filled only with air is tightly capped at 24 C and 744.0mmHg. If the bottle is placed in water at 75C what is the pressure in the bottle?
a particular gas exerts a pressure of 785 mmHg. what is this pressure in units of Atmospheres
Which of the following statements, concerning equal volumes of the gases dinitrogen monoxide, N2O,and propane, C3H8, at the same temp and pressure is incorrect.
At equilibrium, the pressures of NH3 and HCl are both equal to 0.00552 atm, and the mass of NH4Cl (s) is 35.4 g. Calculate the equilibrium pressure of NH3 after 11.3 g of NH4Cl (s) is added to the c