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What two families of elements in the periodic table generally do not accept additional electrons (i.e. which ones have electron affinities close to or above zero)?
A solution of 0.264 M NaOH is used to neutralized 54.0 mL H3PO4 solutions. if 1.0 mL of NaOH is required to reach end point what is the molarity of H3PO4
In the reaction P4 + 5 O2 → 2 P2O5, how many moles of O2 are consumed each time 0.5 moles of P2O5 form?
if a procedure calls for 26.0 ml of concentrated hcl what are the mass and moles of hcl actually used in the
A student standardized her I2 solution by preparing a solution of 0.0450 g of ascorbic acid (vitamin C) in a 100 mL volumetric flask. She titrated several 10.00 mL samples of the Vitamin C solution
A rare gold coin (24 karat, or 100% gold) has a mass of 25.54 g. How many atoms of gold are present in this coin
You are about to perform a reaction that requires 1.25 mol of CaCl2 to go to completion. The solution available in the stock room has a concentration of 33 % w/v. How many mL of this solution will you need to use
A 1.25-gram sample of FeC2O4 is added to an evacuated 2.00-L steel vessel. The vessel is heated to 400°C, at which point all the FeC2O4 is decomposed: FeC2O4 (s) # FeO (s) + CO2 (g) + CO (g) Calculate the total pressure inside the vessel at 400°C
An interference filter is to be constructed for isolation of nitrobenzene absorption band at 1537 cm^-1 if it is to be based on first order interference, what should be the thickness of the dielectric layer
How would the process of photosynthesis be affected, and in what steps, if light, CO2 concentration, and/or temperature were altered during photosynthesis
if gasolines composition is estimated to be 50 octane 25 pentane and 25 ethly benzene on a mol basis calculate the mols
Calculate the number of moles of an ideal gas if it has a pressure of 1.21 atm, a volume of 1.68 L, and a temperature of 217 oC. Use R = 0.0821 L-atm/mol-K for the value of the gas constant
5g of Oxygen combines with 37.20g of Uranium to form Uranium Oxide: What percentage (by mass) of this compound is O and U
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