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A sample of oxygen, at 25°C, occupies a volume of 4.56 × 102 milliliters (mL) at 1.66 atm pressure. What pressure must be applied to compress the gas to a volume of 1.41 × 102 mL, with no temperature change?
Calculate delta H rxn for the reaction MnO2(s) + 2C(graphite) ---> Mn(s) +2CO(g) from the following information: Mn(s) +O2(g) ---> MnO2 delta H = -520.03 kJ 2C(graphic) + O2(g) ---> 3CO (g) delta H = -221.04 kJ
Experimental evidence suggests that the nitrogen atom in ammonia, NH3, has four identical orbitals in the shape of a pyramid or tetrahedron.
the absolute temperature of the gas at which 3.33 10-3 mol occupies 257 mL at 722 torr K (c) the pressure, in atmospheres, if 0.0471 mol occupies 428 mL at 118°C atm (d) the quantity of gas, in moles, if 66.2 L at 50.°C has a pressure of 11.38 kPa..
Make an energy level diagram, showing ALL suborbitals, large enough to accomodate the 1st 36 elements
If the following three chemicals (benzyl alcohol, benzaldehyde and benzoic acid) were chromatographed using silica gel TLC plates, which should have the highest Rf value? Hint: What intramolecular forces are involved between each of these chemical..
Explain when performing the recrystallization step, you boiled down the solvent until you began seeing crystals form and then let it cool on the bench as well as then further cooling it with ice.
a gas sample containing 1.55 mol at 25degc exerts a pressure of 387 torr. some gas is added to the same container and
Which of the following reactions best describes the acid-base properties of acetic acid (HC2H3O2) in aqueous solution
There are two stable isotopes of copper. Their masses are 62.9296 amu and 64.9278 amu. If the average atomic mass of copper is 63.55 amu, what is the natural substance of the lighter isotope
HND Chemistry-STH 422-Forensic Biochemistry- Describe the collection, preservation and forwarding of materials of forensic interest to the laboratory.
PbCl_4_ solution reacts with 20.0 mL of (NH_4)_SO_4_, what is the molarity of the (NH_4)_SO_4_?
The pressure exerted on a 240 mL sample of hydrogen gas at instant temperaure is increased from .428 ATM to.724 ATM. What will the final volume be for the sample be?
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