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The black oxide of iron, Fe3O4, occurs in nature as the mineral magnetite. This substance can also be made in the laboratory by the reaction between red-hot iron and steam according the following: 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g).
(a) When 36.0 g H2O are mixed with 67.0 g Fe, which is the limiting reagent?
(b) What mass in grams of black iron oxide is produced?
(c) What mass in grams of excess reactant remains when the reaction is completed?
You begin an experiment with 0.20 M reactant A and 0.40 M reactant B. After the reaction has been allowed to achieve equilibrium, you have 0.10 M product C. What molarity of A do you have remaining at equilibrium
why is a solution containing dissolved brass made basic with concentrated NH3 and again with acidified CH3COOH?
Which statement best describes the polarity of CF2Br2. The molecule is always nonpolar The molecule is always polar Depending on the arrangement of outer atoms, this molecule can be polar or non polar
The magnetic properties of B2 are consistent with the p2p MOs being lower in energy than the O2p MO.
Assume the yield of the reaction is 100 percent. Assume the volume, temperature, moles, and presure are actually known to three signficant figures.
Saturated aqueous sodium chloride(d=1.2g/mL) is added to the following mixtures in order to dry the organic layer. Which layer is likely to be on the bottom in each case?
What is the Gibbs energy difference across the membrane at 37°C. The difference in concentration must be sustained by coupling to reactions that have at least that difference of Gibbs energy
Ozonolysis of a single enantiomer of R produces S, an acyclic, optically active ketoaldehyde of formula C6H10O2. Propose structures for compounds Q, R, and S. Do not label them; simply draw all three of them in the space provided in any order.
A 100.0 mL sample of 0.200M aqueous hydrochloric acid is added to 100mL of 0.200M aqueous ammonia in a coffee cup calorimeter. The following reaction occurs when the two solutions are mixed
the reaction of no with cl2 is2 no cl2 2 nocluse reactant molecules to write appropriate elementary reactions that
If the diameter of a sodium atom is 3.14×10-8 cm, how many sodium atoms would fit along a line exactly 6.00 inch long?
What immediate actions should the marshal take to protect public health, safety, and the environment? Aside from the explosive nature, discuss the health effects associated with its component nitroglycerin.
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