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The atomic weight of a newly discovered element is 110.352 amu. It has two naturally occuring isotopes. One has a mass of 111.624 amu. The other has an isotopic mass of 109.875 amu. What is the percent abundance of the last isotope (109.875 amu)?
What is the minimum amount of Tc-99 that must be shipped in order for the lab to receive 10.0 mg? Show you working please
What will be the experimental enthalpy of reaction when 0.5000g of zinc reacts with 20.00mL of 1.500M HCl, changing the temperatrure of the solution
The resulting solution required 13.73 mL of 0.176 mol L?1 NaOH(aq) to neutralize the excess, unreacted HCl. What was the percentage by mass of Mg(OH)2 in the original sample [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a ch..
if the hindenburg held 2.0 times 10^5 m^3 of hydrogen gas at 23 degrees C and 1.0 atm, what mass of hydrogen was present
The gas effuses at a rate that is 0.404 times that of neon in the same apparatus under the same conditions. How many atoms are in a molecule of gaseous white phosphorus?
Dehydrohalogenation of (2R, 3R)-2-bromo-3-methylpentane by a bimolecular reaction produces only (E)-3-methyl-2-pentene and 3-methyl-1-pentene as products. Provide a mechanistic explanation as to why (Z)-3-methyl-2-pentene is not formed.
An ice cube of 15.1 grams is placed into 304 grams of H 2 O. compute the change in temperature in the H 2 O upon completing melting of the ice.
Draw an energy diagram to show the progress of reaction (including reactants, transition state(s) and intermediate (if any). Then explain how the major product was determined.
A solution of 2.00 g of para-dichlorobenzene (a clothes moth repellant) in 50.0 g of cyclohexane freezes at 1.05 C. What is the molar mass of
The heat energy required to melt 1.00 g of ice at 0 degrees C is 333J. If one ice cube has a mass of 62.0 g, and a tray contains 16 ice cubes, what quantity of energy is required to melt a tray of ice cubes to form liquid water at 0 degrees C
how does nitrobenzoic acid form as a by-product during the nitration of methyl benzoate and how is it removed?
The second car is of European manufacture, costs$21,700, and has a rated mileage of 19km/L. If the cost of gasoline is $1.25/gal and if the cars actually deliver their rated mileage, estimate how many miles you would have to drive for the lowest f..
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