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Limestone, CaCo3, when subjected to a temperature of 900 degrees Celsius in a kiln, decomposes to calcium oxide and carbon dioxide. How much heat is evolved or absorbed when one gram of limestone decomposes?
If somebody could please solve it and show the steps ill be forever grateful and will rate 5 stars. 1.) What is the change of energy when an electron of boron travels from the 4th energy level to the 2nd energy level
hyperchem puts it in one of the two degenerate homo orbitals. display these two orbitals and paste them into your
Assuming that a neutron star has the same density as a neutron, calculate the mass (in {\rm kg}) of a small piece of a neutron star the size of a spherical pebble with a radius of 0.16 mm
what is the mass in milligrams of ink in a droplet from this printer? Is ?milligrams? an appropriate unit for describing this mass?
a gaseous mixture of o2 and kr has a density of 1.102 gl at 420 torr and 300. k. what is the mole percent o2 in the
the molecules water and methane have similar masses but methane changes from a gas to a liquid at -161 degrees celsius.
Calculate the pH of a 100 ml solution containing 1.00 g of imidazole (FM 68.08) and 1.00 g imidazole hydrochloride (FM 104.54). pKa of imidazole is 6.993. How many ml of 1.07 M HClO4 should be added to 1.00 g of imidazole to give a pH of 6.993
You are given a 1.56-g mixture of sodium nitrate and sodium chloride. You dissolve this mixture into 127 mL of water then add an excess of 0.537 M silver nitrate solution. You produce a white solid, which you then collect, dry, and measure. The wh..
Calculate the number of moles of O2 required to react with phosphorus to produce 5.50 g of P4O6. (Molecular mass P4O6 = 219.9 g/mol.)
Find concentration of each ion present in the solution formed by mixing: 44.0 mL of 0.150M Na2SO4 and 25.0 mL of 0.200M KCl.
Write the dissociation reactions (with structures) of the 20 amino acids. My textbook and study guide does not cover this.
Use the table of standard reduction potentials to calculate the equilibrium constant at a standard temperature (25 degrees C) for the following reactions:
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