What is the percent abundance of each isotope
Silver has two stable isotopes with masses of 106.90509 amu and 108.9047 amu. The average molar mass of silver is 107.868 amu. What is the percent abundance of each isotope?
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Determine the pH at the equivalence (stoichiometric) point in the titration of 31.4 mL of 0.899 M HF by 0.886 M NaOH. The Ka of HF is 3.5 x 10^-4.
Assume that the ?Ho and ?So of vaporization do not change significantly with temperature. Calculate the vapor pressure of CH3OH at 70 oC (in atm).
Calculate the pH of the resulting solution if 22.0 mL of 0.220 M HCl(aq) is added to (a) 32.0 mL of 0.220 M NaOH(aq). (b) 12.0 mL of 0.320 M NaOH(aq).
How many orbitals are there in a atom with the following combinations of quantum numbers? A). n=3 l=1 B). n=4 l=2 ml=2
Calculate the wavelength in nm: a) a muon (a subatomic particle with a mass of 1.884 x 10^-25 g) traveling at 345 m/s b) an electron (me = 9.10939 x 10^-28 g) moving at 3.80 x 10^6 m/s in an electron microscope
Part A: Thymolphthalein is an indicator that changes color over a range from pH = 9.3 to pH = 10.5 . What is Ka of thymolphthalein. Part B: Alizarin yellow R, Ka=7.9x10^-12, is yellow in its protonated form (HX) and red in its ionized form (X-)
Aluminum reacts with oxygen to yield aluminum oxide. If 5.0g of AL reacts with 4.45g of oxygen what is the empirical formula of aluminum oxide
If a power plant burning 10,000 metric tons of coal per day with 6% excess air emits stack gas containing 222 ppm by volume of NO, what is the daily output of NO(in metric tons /day) ? (Assume coal is pure C).
Draw the products that correspond to syn addiction of Br2 to trans cinnamic acid and those that correspond to anti addition.
Give an example of a metabolic pathway of a drug or endogenous substance for each of the following reaction types and determine the electrophile and nucleophile: SN1 reaction Radical reaction E1 reaction.
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