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By how much will the pH change if 25.0 mL of 0.20 M NaOH is added to 0.500 L of a buffer that contains 0.15 M HC2H3O2 (Ka = 1.8 x 10-5) and 0.25 M C2H3O2-?
A gas occupies 1.55 L at 0.80 atm. What pressure would the gas exert if the volume were allowed to increase to 3.50 L?
An aqueous solution is 5.80% methanol (CH3OH) by mass with d= 0.988 g/ml. What is the molarity of CH3OH in this solution
A protein has been eluted from a DEAE-cellulose column by washing with a salt-containing solution. Before the protein is subjected to a quantification assay,
If 1.35 g of silver nitrate is dissolved in 115mL of water, and to this solution is added 5.00 mL of 1.45M hydrochloric acid resulting in the formation of a precipitant. Find the concentration of silver ions remaining in solution.
Identify the most stable arrangement of the regions of high electron density. Diagram and name the type of structure that the molecules has based on positions of the atoms.
The rate constant for a certain reaction is k = 1.50×10?3 s^-1 . If the initial reactant concentration was 0.650M , what will the concentration be after 13.0 minutes?
Find the volume and the intermolecular force present in ammonia at STP in the following reaction and What is the intermolecular force is present in NH3(g).
A scuba diver with a lung capacity of 5.4L inhales a lungful of air at a depth of 47m and a pressure of 5.7 atm. If the diver were to ascend to the surface (where the pressure is 1.0atm ) while holding her breath, to what volume would the air in h..
ammonia nh3 can be synthesized by the following reaction2 no g 5 h2g -gt 2 nh3g 2 h2ogstarting with 86.3 g no and
What is the maximum number of grams of NaCl that can be added to 4.0 L of a 0.0090 M lead(II) chloride solution (without changing the volume significantly) without causing any precipitation of lead(II) chloride? For lead(II) chloride, Ksp = 1.6 x ..
Molybdenum crystallizes in a body-centered cubic lattice (the Mo atoms are at the lattice points only). If the density of the metal is 10.3 g/cm3, what is the unit cell edge length in pm?
Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.505-g sample of Mg metal is added to 150.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. What mass of H2 is formed
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