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Which equation represents a reaction that provides the heat of formation of Fe3O4? (Just write A,B, C, D, or E on the answer sheet)
a) 3 Fe(s) + 4 O(g) ---> Fe3O4 (s) b) 6 Fe(g) + 2 O2(g) ---> 2 Fe3O4 (s)
c) 3 FeO(s) + H2O(g) ---> Fe3O4 (s) + H2(g) d) 3 Fe(s) + 2 O2(g) ---> Fe3O4 (s)
e) Fe(s) + 2/3 O2(g) --> 1/3 Fe3O4 (s)
The benzene-toluene system obeys Raoult's law because benzene and toluene molecules have similar shapes and electronic structures
what's the molar solubility (mol/L) of Cr(OH)3 at pH=10.00 (not buffered)? Ksp for Cr(OH)3 is 3.0E-29
Copper and zinc (elements 29 and 30, respectively) appear next to each other on the periodic table. A 5.50 g sample of zinc has a volume of 0.770 mL, while a 5.50 g sample of copper has a volume of 0.616 mL. Why?
An amount of lactic acid is dissolved in water and the reaction is allowed to reach equilibrium. The concentration of the protonated acid is found to be 2.5 M.
The mass of 322 mL of hydrogen gas at 4.0 atm and -73°C is 1.21 grams. What is the density of hydrogen gas at STP?
C7H6O3 + CH3OH --> C8H8O3 + H2O In an experiment 1.50 g of salicylic acid (C7H6O3) is reacted with 11.20 g of methanol (CH3OH).
if you burn 1.5 mol C3H8 according to the following reaction C3H8 +5O2 = 3CO2 + 4H2O how many grams of carbon dioxide are produced.
For each species listed, indicate the hybrid orbital set (sp2, sp3d, etc) employed by the central atom
Give the structure that corresponds to the following molecular formula and 1H NMR spectrum:
Calculate the cell potential for the following reaction as written at 73C, given that [Cr2+]=.885M and [Fe2+]=.0100M.
V = 4.55 mL at 147 atm. What is the pressure if the volume changes to 10.0 mL?
Lithium has an atomic mass of 6.9409 amu. What is the percent abundance of lithium-6?
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