What is the mass of the steel bar
125 mL of rm H_2O is initially at room temperature (22.0rm{} ^{circ}C). A chilled steel rod at 2.0rm ^{circ}C is placed in the water. If the final temperature of the system is 21.5^{circ}C, what is the mass of the steel bar?
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A stock solution is prepared by adding 10 mL of 2.5 M Ba(CN)2 to enough water to make 23 mL. What is the CN- concentration of 5 mL of the stock solution
Calculate the maximum mass of solid (undissolved) phenacetin that can be recovered when the cooled solution is filtered.
The enzyme, carbonic anhydrase, is a large zinc-containing protein with a molar mass of 3.00 × 104 g/mol. Zn is 0.218% by mass of the protein. How many zinc atoms does each carbonic anhydrase molecule contain?
A 10-cm outside diameter by 6-cm inside diameter steam line made of steel (k=14 W/m c) delivers superheated steam at 1000 C. the line is wrapped with 10 cm of insulation (k=0.16 W/m C) .
What volume and amss of steam at 100 degrees C and 1.00 atm would release the same amount of energy during condensation at 100 cm3 of liquid water would release during freezing?
How many liters of oxygen collected over H2O and measured at 27 degrees Celsius and 745.0 mm Hg can be prepared by decomposing 4.421 grams of gold (III) oxide?
Calculate the concentration of a solution composed of 13.1 g od Ba(NO3)2 dissolved in 750 g of water.
A half-cell, made by dipping a silver wire into 0.05 M aqueous AgNO, at 298 OK, develops a half-cell potential of +0.740 volts. What is the standard half-cell (Eo) for silver?
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