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Magnesium has three naturally occurring isotopes: Mg-24 that has a percent abundance of 78.99 % and a mass of 23.985 amu, Mg-25 that has a 10.00 % Abundance and a mass of 24.986 amu, and Mg-26 that has a percent abundance of 11.01% and a mass of 25.983 amu
Calculate the atomic mass for magnesium using the weighted average mass method.
Express your answer using two decimal places and include the appropriate units.
Which of the following compounds have a meso form? 1, 3-dichloropentane 2, 3,-dichloropentane 2, 4-dichloropentane 1, 5-dichloropentane
Which of the following intermediates is believed to occur in the mechanism by which alkenes are hydrated in the presence of acid?
Based on the mass of caffeine, you can now determine the % weight of caffeine in the original tablet. How does this compare with what the packaging states?
What is the pressure exerted by some nitrogen gas collected in a tube filled with water on a day when the room temperature is 18.0ºC
What is the percent recovery of the precipitate
nh absorptions are usually much weaker and less broad than the oh absorptions. neat aliphatic primary amines show two
A NaOH soln of unknown concentration was standardized against KHP. It took 45.78 mL of NaOH soln to completely titrate 1.256 g of KHP. Cal the molarity of NaOH.
Draw all the monochlorinated derivatives of 2,2,3,3-tetramethylbutane that are skeletal isomers of one another. To make a monochlorinated derivative of a compound, replace one H atom in the compound with Cl.
Derive the relationship that the effective rate constant of the reaction K is the same as (d[P]/dT)/([A][B]) takes the form k= k2 exp(-deltaG/RT) Where deltaG(these deltaG are with double dagger )is the standard free energy difference between the ..
20ml of 10 N HCl are diluted with distilled water to form one litre of the solution. What is the normality of the diluted solution? A solution contains 25% of water, 25% of ethanol and 50% of acetic acid by mass. Calculate the mole fraction of ethano..
The question in the lab is asking what percentage by mass is the calcium, chloride and water in the orginal solution for each trial. In this lab we performed two trials, in each, we added 50 mL water to 2.0 g of CaCl2.
Using the selection rules deltaS=0, deltaL=+-1 and deltaJ=0,+-1, predict which transitions are allowed from the ground level in A). Consider only transitions between terms within each configuration given.
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