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Naturally occurring magnesium has an atomic mass of 24.312 amu and consists of 3 isotopes. The major isotope Mg-24, natural abundance 78.99%, relative atomic mass 23.98504 amu. The next most abundant isotope Mg-26, relative atomic mass 25.98259 amu. The third one, Mg-25, whose natural abundance is in the ratio of 0.9083 to that of Mg-26. Find the relative atomic mass of Mg-25.
What should you observe happening to the gas produced: A) If the concentration of the acid HCl is increased? B) If the solid calcium carbonate is in powder form
At 521 K the value of Kp for the equilibrium represented by the balanced equation is 1.07 x 100. Calculate the value of Kc at the same temperature. Express answer in scientific notation.
A nurse was accidentally exposed to potassium-42 while doing some brain scans for possible tumors. The error was not discovered until 36 hours later when the activity of the potassium-42 sample was 1.9 aCi.
Calculate the heat release when 62.0 g of steam at 129 C is converted to water at 50 C. Assume that the specific heat of water is 4.184 J/g x C
What is an alternative analytical procedure for determining the quantity of water
imagine that you run a nursing home facility in your area. analyze and comment on the role public policy has in the
When would you do a hot filtration. Why do you wash your crystals after you collect them by filtration
If a sample containing 2.03 mL of nitroglycerine (density = 1.592 g/mL) is detonated, how many total moles of gas are produced?
What compounds is used to to change single bonded octane into double bounded high octane
if a open-tube manometer contains a non volatile silicone oil density1.30 gcm3 instead of mercury 13.6 gcm3 what are
Calculate the changes in the CO and Cl2 concentrations that occur if the concentration of COCl2 decreases by 0.103 mol/L as the following reaction comes to equilibrium.
calculate the estimated ratio of the protonated form of acetylsalicylic acid to the deprotonated form of aspirin at equilibrium in the stomach? acetylsalicylic acid(Aspirin) is a weak acid with a pKa = 3.4, Stomach acid has pH = 1.4.
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