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A 45.5g sample of copper at 99.8 Celsius is dropped into a beaker containing 151 g of water at 18.5 Celsius. What is the final temperature when thermal equilibrium is reached?
A 1.90 g sample of a large boimolecule was dissolved in 11.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecu
One cup is equivalent to 237 cm^3. If 1 cup of olive oil has a mass of 216g, what is the density of olive oil in g/cm^3?
A flask is charged with 2.00 atm of CCl4, which then reaches equilibrium at 700 K. What fraction of the CCl4 is converted into C and Cl2?
A 21 L tank contains a gas under a pressure of 367 atm. What volume would the gas occupy at the same temperature at 630 torr of pressure?
Arrange the elements in order of decreasing first ionization energy.
What is the molarity of a solution containing 16.0 {rm g} of {rm KCl} in 324 {rm mL} of solution?
State three disadvantages of the Wittig reaction.
Explain why all the solutions (iron (iii) nitrate and potassium thiocyanate) used in this experiment were made in 0.1 M HN03 rather than in deionized water.
What is soil? How is soil made? Historically, what practices have resulted in the loss of topsoil?
If 65.65 g of mercury(II) nitrate and 4.26 g of hydrogen sulfide are mixed in 490.0 g of water to form 54.16g of precipitate, what is the mass of solution after reaction?
The pressure of a gas is 817 torr at 55°C. The quantity of the gas is fixed and the volume remains constant as the pressure is adjusted to 6.00 ´ 102 torr. What is the resulting temperatu
If 18.6 of 0.800 solution are needed to neutralize 5.00 of a household ammonia solution, what is the molar concentration of the ammonia?
The phospholipids in the outer leaflet of the plasma membrane of a human cell are fluorescently labeled. This cell is then fused with a mouse cell. Based on the fluid mosaic model of membranes, pred
A 0.250g sample of citric acid dissolved in 25.0 mL of water requires 37.20 mL of 0.105 M NaOH for complete neutralization. What is the molecular formula of citric acid?
What shared property of α helices and β sheets favors the formation of these structures in membrane spanning domains of a protein?
Each aluminum can weighs 38.5g and contains 12.0 fluid ounces of beverage. The specific heat of of aluminum is 4.10J/gC. The density of the beverage is 1.07 g/mL. How many grams of ice must be melte
Calculate the weight and number average molecular weights as a function of conversion for the linear polycondensation of the aminoacid NH2-(CH2)7-COOH.
Calculate the amount of heat required to completely sublime 50.0 g of solid dry ice at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol
2 mol of a compound is allowed to react in a foam coffee cup that contains 101 grams of water. the reaction caused the temperature of the water to rise from 21 to 24.7 C. What is the enthalpy of the
If NaOH is added to the solution, will the amount of CaC2O4(s) precipitate increase or decrease ? Explain why by discussing the direction of the shift in each equilibrium reaction.
What will the final temperature be, of a mixture made from equal masses of the following: water at 25.0C, ethanol at 35.5C and iron at 95.0C?
The average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. What is the molarity of the strontium ion if the density of the seawater is 1.025 g/mL.
When a metal was exposed to light at a frequency of 4.00× 1015 s-1, electrons were emitted with a kinetic energy of 5.40× 10-19 J. What is the maximum number of electrons that could be
What mass of sucrose should be combined with 455 g of water to make a solution with an osmotic pressure of 8.75 atm at 320 K? (Assume the density of the solution to be equal to the density of the s