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Aluminum has many different isotopes. What percentage of the mass of 26Al is attributable to its neutrons?
Nickel nitrate and potassium carbonate react to form nickel carbonate and potassium nitrate. How many milliliters of 0.55M Ni(NO3)¬2 are needed to react with 85 mL of 0.25M K2CO3?
a gas is placed in a storage tank at a pressure of 20.0 atm at 20.3 degrees celsius. as a safety device there is a
The molar volume of a certain form of solid lead is 18cm3/mol. Assuming cubic closest packed structure, determine the following: The volume of a single cell.
Recrystallization from 95% ethanol gave yellow crystals. What is the overall mechanism for this reaction including all arrows, the identification of the electrophile and nucleophile, and all charges?
What are the concentrations of HSO4-, SO42-, and H+ in a 0.20 M KHSO4 solution? (Hint H2SO4 is a strong acid; Ka for HSO4- = 1.3x10-2)
An empty gasoline can with dimensions 15 cm by 40 cm by 12.5 cm is attached to a vacuum pump and evacuated. if the atmospheric pressure is 14.7 lb/in^2.
Describe the effects of a catalyst on a reaction; (what is changed what is not), include a rough sketch showing the reaction profile for an uncatalyzed reaction and a catalyzed reaction
what is the speed of a proton in a linear accelerator has a de Broglie wavelength of 159 rm pm
in a reaction where pbcl2 precipitate was formed using pbno33 and hcl explain why the pbcl2 precipitate dissolved when
A 0.456 gram sample of an unknown monoprotic acid (lets call it HZ) was dissolved in some water . Then the acidic solution was titrated to the equivalence point with 32.5 mL of 0.174 M KOH.
A 0.010 M aqueous solution of a weak acid HA has a pH of 4.00. What is the percent dissociation of HA in the solution
Calories given off when 83g of water cools from 48 degrees Celsius to 27 degrees Celsius.
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