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A coffee-cup calorimeter contains 140.0 g of water at 25.2 *C. A 122.0 g block of copper metal is heated to 100.4 *C by putting it in a beaker of boiling water. The specific heat of Cu(s) is 0.385 J/g*K . The Cu is added to the calorimeter, and after a time the contents of the cup reach a constant temperature of 30.2 *C.
Determine the amount of heat, in Joules, lost by the copper block
You use 32.0 mL of NaOH to titrate 100. mL of HCl and 22.2 mL of NaOH to titrate 50.0 mL of 0.0836 M H2SO4. Find the unknown concentrations. NaOH HCl
HCOOH and HCOONa How many milliliters of HCOOH and HCOONa would you use to make approximately a liter of the buffer?
Calculate the specific rotation of the compound. A sample of 150 mg of an organic compound is dissolved in 7.5 ml of water. The solution is paced in a 20-cm polarimeter tube and the rotation measured in a polarimeter
what is the minimum rate that fresh air has to be supplied to the room so that the concentration of CO2 in the room doesn't exceed 0.500% by mole? Assume the room is well mixed, and the volume of the solid dry ice does not change. mol air/min
For a particle in a one-dimentional box, calculate the probability that the particle will be found in the middle third of the box: L/3 less than or equal to x less than or equal to 2L/3.
if you mix 40.0 mL of 0.366 M of K2CrO4 with 40.0 mol of 0.366 AgNO3. what mass of solid Ag2CrO4 would form?
What is the solubility of lead fluoride in a solution of 0.050 M of sodium fluoride?
A sample consisting of 3.0 mol of ideal gas molecules at 200K at 2.00 atm is compressed reversibly and adiabatically until the temperature reaches 250K.
how many grams of C5H10O2 need to be dissolved in 50 mL of solution, in order to have a 0.1 molar solution?
What molarity of aqueous magnesium chloride solution can be expected to show the same conductivity
What volume (in mL) of a 1.420M NaOH solution is required to titrate 25.0mL of 4.50M HCl solution.
What volume of 1.40M NaOH solution must you add in order to prepare an acetate buffer of pH = 4.83? (The pKa of acetic acid is 4.76).
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