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Describe how you will prepare a H2PO4-/HPO42- buffer using solid sodium dihydrogen phosphate and sodium hydrogen phosphate (pH 7.4, 500 mL 0.40M each).
If fuel mixtures are required to contain 3.0 oxygen by mass, how many grams MTBE must be present in each 110 gasoline.
Write the balanced equation for the net cell reaction for the voltaic cell in acidic solution. (First two are the anode, last two are the cathode)
how much tris (MW 121 g/mol) do you need to make 100 mL of a 20 mM buffer? 2) how much NaCl do you need to make 100 mL of a 5mM solution?
names of five alkenes having the molecular formula C6H12 that produce hexane on catalytic hydrogenation
Electrons are ejected from sodium metal by any light that has a wavelength shorter than 544 nm. What is the kinetic energy of an electron
Chlorous acid, HClO2, has a dissociation constant of Ka = 1.20 * 10^(-2). Assume that you have a 0.0755 m solution of this acid and calculate the concentration of H+ cations in the solution and degree of dissociation for a solution of the acid
Draw the phase diagram of water and put a on the phase diagram to show the pressure and temperature conditions in the day and at night on the moon.
In testing for the efficacy of an antacid compound, 5.00 g of hydrochloric acid is mixed with 24.0 g of magnesium hydroxide. Is this enough base to react with all of the acid
What is the pressure (in atm) exerted by a 2.00 mole sample of gas that occupies 2.50 L at 307.15K? The value of R = 0.0821 L atm mol - 1 K - 1 .
HNO3 has 2 dissociating ions whereas Al(NO3)3 has 4, which should result in a higher conductance value. Would this have something to do with aluminum nitrate being paired with water as a solid?
Magnesium nitride reacts with liquid water to form insoluble magnesium hyrdroxide and ammonia. What is the balanced equation for such?
Elemental exonium (not a real element) consists of two major isotopes
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