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The Gibbs free energy of formation of solid iron (III) oxide is the Gibbs free energy change for the reaction
A. 4 Fe(s) + 3 O2(g) ? 2 Fe2O3(s)B. 2 FeO(s) + 1/2 O2(g) ?2 Fe2O3(s)C. 2 Fe(s) + 3/2 O2(g) ?Fe2O3(s)D. 2 Fe(s) + 3 O2(g) ?Fe2O3(s)
a mixture with 75% R and 25% S has an optical rotation of -30. what is the optical rotation of pure R?
What ratio of concentrations of the molecular base you chose in part a and its conjugate acid would be necesarry to achieve a pH of exactly 10.00?
Diamond is the hardest known substance. Fe metal is soft sunstance. Using your knowledge of bonding, explain why diamond is hard
Predict the mass of the most abundant fragment signal in the mass spectrum of 2,2-dimethylpentane. 85 amu 29
A lake with a cross sectional- area of 1km^2 and a depth of 125m has an euphotic zone that extends 15m below the surface what is the maximum weight of the biomass (in grams of carbon) that can be decomposed by aerobic bacteria
Molar mass has the units of grams/mole. Molar mass serves as a conversion factor between numbers of moles and mass. If you know how many moles you have, you can calculate their mass; if you know the mass of a sample, you can calculate the number o..
Suppose that, from measurements in a microscope, you determine that a certain bacterium covers an area of 1.50 μm2
Consider the following data: expect a BeF2 molecule to be linear but an SF2 molecule to be angular. Explain the decreasing melting point from NaF to Nai.
Calculate the change in enthalpy for the Mg-HCl reaction using standard enthalpies of formation. Delta Hf for HCl(aq)=-167.2kJ
one heating 5.03 g of hydrate barium chloride, 4.23 g is left behind. what is the name of this hydrate?
A gas sample has an original volume of 700 ml when collected at 750 mm and 25°C. What will be the volume of the gas sample if the pressure increases to 810 mm and the temperature increases to 30°C?
Consider the following reaction. N2 + 3 H2 → 2 NH3 . 28.0 grams of N2 and 5.04 grams of H2 are reacted, producing 17.8 grams of NH3. What is the percent yield?
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