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A pt has a blood Ca level of 4.6 mEq/L If 1mol Ca2+= Eq Ca2+ what is the blood calcium levle in mg/dl
A spherical ball of lead has a diameter of 6.5 cm. What is the mass of the sphere if lead has a density
Calculate the solubility of Ba(IO3)2 in a solution containing 200 mL of .010M Ba(NO3)2 and 100 mL of .10M NaIO3. Ksp Ba(IO3)2 = 1.57 x 10^-9
A 43.0 g sample of ethylene glycol, HOCH2CH2OH, is dissolved in 540.0 g of water. The vapor pressure of water at 32°C is 35.7 mm Hg. What is the vapor pressure of the water-ethylene glycol solution at 32°C ?
A 5.645-g sample of a mixture of Fe and Al is treated with excess HCl(aq). If 0.2122 moles of H2 are obtained, then what is the percentage by mass of Fe in the original mixture? Give your answer accurate to three significant figures.
Assuming no heat loss to surrounding, write down the energy balance equation for the system and find out change in internal energy and final temperature.
The initial temperature of the calorimeter is 20.7oC. If 6g of CaCl2 is added to the calorimeter, what will be the final temperature of the solution in the calorimeter?
In preparation of esters given in an experiment, the reaction product was extracted with 5% sodium bicarbonate solution (NaHCO3) in the isolation step. How? What gas was evolved during this washing step?
Have you observed that when you spill water over your skin on a hot day it will cool you down but if you spill vegetable oil in place of water it will not cool you down give explanation for this difference?
what is the equilibrium expression for the reversible reaction of: 2CrO42-(aq) + H2O(l) Cr2O72-(aq) + 2OH-(aq)
What is temperature of boiling water in Denver (in?C) at an elevation of 6000 ft ? 2000 m given that atmospheric pressure at that altitude is about 0.8 atm?
Beta sheets are a type of secondary structure in proteins. A segment of a single chain in an antiparallel. sheet has a length of 172 Å . How many residues are in this segment
A reaction has a standard free-energy change of -10.60 kJ mol-1 (-2.533 kcal mol-1). Calculate the equilibrium constant for the reaction at 25 °C
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