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The deltaG for freezing of H2O(l) at -10C is -210 J/mol and the heat of fusion of ice at this temperature is 5610 J/mol. Find entropy change of the universe when 3mol of water freezes at -10degreesC
A cylinder equipped with a piston expands against an external pressure of 1.58 atm. If the initial volume is 0.485 L
Calculate the concentration of argon in lake water at 20C. if the partial pressure of argon is 0.0090 atm and Henry's constant is 0.0015
what is the molar mass of gas if 0.250 g of the gas occupies 215 mL at 61 8mmHg and 30. 0C
The compound KB5O8·X H2O was analyzed and found to contain 24.6% of water. If the formula weight of this compound is 293.15 g/mol, what is the number of water molecules (X) in the formula?
If the copper is drawn into wire whose diameter is 8.50 mm , how many feet of copper can be obtained from the ingot? The density of copper is 8.94 g/cm^3 .
The weak acid HZ has a ka of 2.55*10^-4. What is the pH of a .075 M HZ? What is the pOH of .045 M HZ?
A lab rat weighs 265g and absorbs 1.68x10^10 beta decay particles, each with ernegy of 2.20x10^-13 J. If relative biological effectiness is 0.75, what is the equivalent dose?
In a beaker, I mix 50 ml of 3 M HCl with 100 ml distilled water. Both fluids are at 25 C initially. (Cp mix =. 0.985 cal/g-C) a. what is the final T.
What is the molar mass of lysine if 750.0 mL of a solution containing 8.60 g of lysine has an osmotic pressure of 1.918 atm? T = 25.0°C
How many grams of malonic acid would be needed to make 50.0 milliliters (0.0500 L) of 0.200 M malonic acid?
the Cu^+ and I^- ions in equilibrium at 298 K are both equal to 1.03 x 10^-6 M, what is the value of delta G for the reaction?
A copper cube measuring 1.58cm on edge and an aluminum cube measuring 1.68cm on edge are both heated to 56.4 degrees C and submerged in 100.0mL of water at 21.6 degrees C. What is the final temperature of the water when equilibrium is reached? (As..
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