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What is an electrolyte? What determine if it is a strong or weak conductor? How does it relate to solubility?
A hypothetical element consists of two isotopes of masses 86.95 amu and 88.95 amu with abundances of 35.5% and 64.5%, respectively. What is the average atomic mass of this element?
Enough of a monoprotic acid is dissolved in water to produce a 1.05 M solution. The pH of the resulting solution is 2.97. Calculate the Ka for the acid.
a solution of ethanol c2h5oh in water is prepared by dissolving 57.0 ml of ethanol density 0.79 gcm3 in enough water
Based on the balanced chemical equation, given that 2.0 g of Na2CO3(molecular weight = 58.44 g/mol) was added to the reaction, how many mL of H2O (molecular weight = 18.00 g/mol) were produced? Remember that moles = mass/molecular weight and that ..
a solution of 120 ml of 0.150 m koh is mixed with a solution of 280 ml of 0.250 m niso4. how many grams of the
Compute the molar Gibbs energy of mixing when two main components of air nitrogen and oxygen are mixed to form air at 298 K. Compute the molar entropy of mixing for the same process. There is one mole of each component.
A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water
What quantity of heat is required to melt 500. g of ice and heat the water to steam at 100. oC? What quantity of heat is required to melt 500. g of ice and heat the water to steam at 100. oC?
The Cl- is at equilibrium across the membrane while the protein is inside the cell and cannot permeate the membrane. Determine the concentration of Pr+/- (in M)?
Which of the following accepts a a-amino group from many amino acids, in a transamination reaction? Glutamate, Pyruvate, coenzyme A, acetyle CoA, a-ketoglutarate
Magnesium metal is easily deformed by an applied force, whereas magnesium fluoride is shattered. Why do these two solids behave so differently
An 80.0-gram sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was done by the system and its internal energy increased by 6275 J. What is the specific heat of the gas
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