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A 2.52 g sample of a compound containing only carbon, hydrogen, nitrogen, oxygen and sulfur was burned in excess O to yield 4.23 g of CO2 and 1.01 g H2O. Another sample of the same compound, of mass 4.14 g, yielded 2.11 g SO3. A third sample, of mass 5.66 g, yielded 2.27 g HNO3. Calculate the empirical formula of the compound.
Assume a 95% yield for the formation of the phosphonium ion, how many milligrams of benzyl chloride and triphenyl phosphine would you need to prepare 220 mg of benzyltriphenylphosphonium chloride?
The reaction of Nitric Oxide (NO(g)) with molecular hydrogen (H2(g)) results in the production of molecular Nitrogen and water as follows; 2 NO(g) + 2 H2(g) --> N20(g) + 2 H2O(g) The experimentally determined rate-law expression for this reaction ..
A concentrated sulfuric acid solution is 65.0% H2SO4 by mass and has a density of 1.55 g/mL at 20°C. What is the mass of 8.00 L of the concentrated sulfuric acid solution?
An aqueous solution contains metal cations Hg^+2 and Mn^+2 belonging to groups 2 and 3 respectively. Thioacetamide which produces H2S is added and the solution is buffered to a pH of 8 by addition of NH3/NH4Cl
In a coordination compound, which ion would you expect to have a higher coordination number with a bidentate nitrate group (NO3-), Co3+ or Ir3+? Why?
which molecule will undergo only london dispersion forces when interacting with other molecules of the same kind?
In elemental analysis combustion is used to analyze for C, H and N content by weight. To analyze for halogen content a variation of the following experiemnt can be used.
Aerosol cans have a label that warns the user not to use them above a certain temperature and not to dispose of them by incineration. Even an empty can contains residual gaseous propellant.
What is the initial concentration (in M) when 19 mL of a iron(III) chloride solution was diluted with 18.5 mL of solvent to a final concentration of 0.576 M? Assume the volumes are additive.
A 0.2254 g sample of naphthalene (C8H10, 128.16 g/mol) was burned in a bomb calorimeter with a heat capacity of 2.18 kJ/K, and the temperature increased by 4.16°C. What is the molar enthalpy of combustion for this compound
How many grams of F2 are needed to produce 158 g of PF3 if the reaction has a 79.8% yield?
An automobile gasoline tank holds 21 of gasoline. When the gasoline burns, 82 of oxygen is consumed and carbon dioxide and water are produced.
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