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Answer the following questions assuming the known reactant is used up in making the rust. Show all your work. Use the rations of reactants (ingredients) from the balanced equation 4Fe + 3O2 = 2Fe2O3
a. How many atoms of iron would be needed to react completely with 36 molecules of oxygen?
b. How many molecules of oxygen would be needed to react completely 16 atoms of iron?
c. How many moles of oxygen molecules would be needed to react with 4 moles of iron atoms?
d. How many moles of iron atoms would be needed to react with 3.75 moles of oxygen molecules?
In a gas mixture, the partial pressures are argon 425 , neon 60 , and nitrogen 125 .What is the total pressure exerted by the gas mixture?
Calculate the molar concentration of uncomplexed Zn2+ in a solution that contains 0.20 mole of Zn(NH3)42+ per liter and 0.0116 M NH3 at equilibrium.
What volume of carbon dioxide gas is produced after the complete combustion of 1L of methane gas?
Nitrobenzene, C6H5NO2, an important raw material for the dye industry, is prepared from benzene, C6H6, and nitric acid. When 22.4g of benzene and an excess of HNO3
The percent ionization of octylamine in a .10 M aqueous solution is 6.7%. What is the pH of the solution and the Kb of octylamine?
transferred from an oven (183°C) to 189 g of water at 23.2°C, into which it is immersed. The water and steel together reach a temperature of 27.9°C. What is the mass of the steel in grams
For each of the following bonds, indicate the posotive ?^+ end and the negative ?^- end. Draw an arrow to show dipole for each: a) SI--Br; b) Se--F; c) Br--F; d) N--H; e) N--P.
A certain organic compound was burned, producing 1.481 g of CO2 and 0.303 g of H2O. The mass of the original sample was 0.438 g. What is the empirical formula of the compound?
How much heat does your body lose when 1.5 g of sweat evaporates from your skin at 25 C? (Assume that the sweat is only water.) The heat of vaporization of water at 25 C is 44.0 kJ/mole.
What mass of solid sodium hypochlorite (molar mass = 74.44 g/mol) should be added to 1.0 L of 0.255M hypochlorous acid to make a buffer with a pH of 7.54? (Ka of HClO = 3.8 x 10-8)
A solution of hexane and heptane at 30 degrees C with hexane mole fraction 0.305 has a vapor pressure of 95.0 torr and a vapor-phase hexane mole fraction of 0.55. Find the vapor pressures of pure hexane and heptane at 30 degrees C. State any appro..
Write the mechanism for the aldol condensation of two molecules of propanal
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