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calculate the ph of soultion prepared by adding20.0ml of 0.100m hcl to 80.0ml of a buffer that is comprised pf 0.25 M NH2NH2 and 0.25M NH2NH3Cl. kb of NH2NH2=1.3X10-6?the answer is 8.03 how?
Calculate the binding energy per nucleon (in MeV) for P-32 (atomic mass = 31.9739 u). mass H = 1.007825 u and mass n = 1.008665 u.
Identify (name) each pathway, the enzyme whose activity determines how much glucose-6-P is metabolized by that pathway, one effector (regulatory molecule) which controls the activity of each enzyme, and how the effector affects the activity of the..
Potassium hydroxide and phosphoric acid react to form potassium phosphate and water according to the equation. 3KOH(aq)+H3PO4(aq)---->K3PO4(aq)+3H2O(l)
A compound is constituted by mass of 22.6% phosphorus, the rest being chlorine. Given that a volume of 307 mL of the gas has a mass of 1.55 g at 25 °C and 90 kPa, find the molecular formula for this compound
If I have 7.0 moles of gas at a pressure of 0.10 atm and at a temperature of 50.1 degrees C in a balloon, what is the volume of the balloon? (Round to one decimal place.)
Calculate the cell potential for the following reaction as written at 73C, given that [Cr2+]=.885M and [Fe2+]=.0100M.
Draw the lewis dot structure oxalate and for carbon dioxide. In terms of electronic structure, what happens when oxalate decomposes
a coffee cup calorimeter containing 100ml of 0.30M HCl at 20.3degrees celcius. when 1.82g of Zn solid is added, the temperature rises to 30.5 degrees celcius. what is the heat of reaction per mole of Zn.
Copper metal is purified by electrolysis. How much copper metal could be produced from copper(II) oxide by applying a current of 10.0 amps
An ice bag containing 324 of ice at 0deg C was used to treat sore muscles. When the bag was removed, the ice had melted and the liquid water had a temperature of 17.0 deg C.How many kilojoules of heat were absorbed?
Many elements can have more than one charge or oxidation number. In this set of problems, we will assign oxidation numbers to each atom in sulfate, carbonate, bicarbonate, bisulfate, sulfite, nitrate, nitrite, chlorate, and perchlorate.
To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to small volumes. What is the pressure of 3.40mol of gas D measured at 251 C in a 1.75-
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