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Circle the substance that is best described for each pair
a. Highest vapor pressure HF(l) HCl(l)
b. Highest boiling point He (l) Xe (l)
c. Highest melting point C3H8(s) C6H6 (s)
d. Best conductor of electricity NaCl (s) CaCl2 (l)
e. Highest heat of fusion PCl3 (l) PCl5 (l)
a student had to prepare 250 ml of a silver nitrate solution of known molality. unfortunately the container did not fit
When hydrochloric acid of 200 mL was mixed to a small piece of CaCO3 in the same calorimeter, the temperature increased by 4.25 degree celsius. determine the heat output for this reaction?
A technician is plating a faucet with 0.86 grams of chromium from an electrolytic bath containing aqueous Cr2(SO4)3. If 12.5 minutes is allowed for the operation, what current is needed
Make a table showing the initial, change, and equilibrium concentrations for each of the substances in the system.
An unknown metal is found to be arranged in an fcc structure. The density of the metal is 8.91g/cm3 and the edge cell length is 352.4pm find out the molar mass of the metal. Define what is the metal
For the titration of 50.00 mL of 0.0200 M 2-(N-Morpholino)ethanesulfonic acid with 0.09900 M NaOH, calculate how much titrant (mL) is required to reach a pH of 9.29 mL in the receving flask.
A gas expands and does 82.7 J of work on the surroundings. At the same time, the gas loses 103 J of energy to the surroundings as heat. What is the change in the internal energy of the gas?
Urease enhances the rate of urea hydrolysis at pH 8, 20 degrees C, by a factor of 1E14. If a given quantity of urease hydrolyzes a given quantity of urea in 6.0 minutes at 20 degrees C and pH 8
Write the structures that would be formed when phosphatidyserine is cleaved with the following enzymes. 1. phospholipase A1 2. phosholipase A2 3. phospholipase C 4. phospholipase D
When you plotted the second derivative curve, your regression line had the formula y= -20.7x+259.1. What is the Molarity of the unknown acid. Solve the above questions, Show each steps for the above problem
If an audiotape playing at a speed of 1.875 in. s -1 takes 45.0 min to play through one side, what is the length of the tape in feet. in meters.
When a 8.26-g sample of gaseous hydrogen bromide dissolves in 36.2 g of water in a coffee-cup calorimeter the temperature rises from 25.00C to 82.14C. Calculate H in kJ/mol HBr for the solution process.
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