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A piece of silver metal has a mass of 2.365 g. If the density of silver is 10.5 g/cm3, what is the volume of the silver in cm3?
A 350 mL air sample collected at 35 degrees C has a pressure of 550. torr. What pressure will the air exert if it is allowed to expand to 425 mL at 57 degrees?
Titration of 80.0 ml of an unknown concentration of H3PO4 solution that requires 126 ml of .218 M KOH solution. What is the concentration of H3PO4 in M?
The normal boiling point of methanol is 64.7°C. A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 710.0 torr at 64.7°C. What is the mole fraction of methanol i
If the activation energy for a given compound is found to be 42.0 kJ/mol, with a frequency factor of 8.0 × 1010 s-1, what is the rate constant for this reaction at 298 K?
What is the theoretical yield of aspirin if 175 kg of salicylic acid is allowed to react with 118 kg of acetic anhydride?
What will the volume of the sample become if 459 mL of an ideal gas at 27 °C and 1.05 atm is cooled to 15 °C and 0.997 atm?
7.17-g sample of potassium chlorate was decomposed according to the following equation:
A 1.248-g sample of limestone rock is pulverized and then treated with 30.00 mL of 1.035 M HCI solution. the excess acid then requires 11.56 mL of 1.010 M NaOH for neutralization. calculate the perc
the total volume of seawater is 1.5*10^21L. Assume that seawater contain 3.1 percent sodium chloride by mass and water and that its density is 1.03 g/mL. Calculate the total mass of sodium chloride
What is the molar solubility of silver cyanide in 0.075M NaCN? Ksp of NaCN is 1.2x10-16.
At 850 K, the value of equilibrium constant Kp for the ammonia synthesis reaction is .2650. If a vessel contains an initial reaction mixture in which [N2]= 0.0200 M, [H2]= 0.0250 M, and [N2H2]= 0.00
What is the molar concentration of Cl- ions in the final solution? What is the molar concentration of Ni2+ ions in the final solution?
A sample of oxygen that occupies 1.00x10^6mL at 575 mmHg is subjected to a pressure of 1.25 atm. What will the final volume of the sample be if the temperature is held constant?
80.0 grams of diiodine pentoxide reacts with 28.0 grams of carbon monoxide. How many grams of I2 could be produced?
A sample of HCl gas is placed in 326mL flask where it exers a pressure of 67.5 mmHg. What is the pressure of this gas sample if it is transferred to a 135mL flask at the same temperature?
Determine the molar concentration of an aqueous solution of lead(II) nitrate solution that is 26.0 ppb (parts per billion) Pb(NO3)2. The density of the solution is 1.00 g/mL
One reaction of iron with hydrochloric acid is represented by the following thermochemical equation.
A gas at a pressure of 2.0 atm is contained in a closed container. Indicate the changes in its volume when the pressure undergoes the following changes a constant temperature.
Which of the following is an example of secondary active transport using an antiporter?
using the smallest possible integers. What is the sum of the coe?cients of the reactants?
What would be the resulting molarity of a solution made by dissolving 21.9 grams of KCl in enough water to make an 869-milliliter solution? Show all of the work needed to solve this problem.
A sample of carbon consists of the isotopes carbon-12 and carbon-13.A sample of oxygen consists of the isotopes oxygen-16 and oxygen-17.Write the formula of all the different carbon dioxide molecule
You measured the absorbance of each solution at a 550 nm and plotted Absorbance vs. Concentration as shown below: What is the extinction coefficient of the rhodamine dye?
Phosphoric acid can be prepared by reaction of sulfuric acid with "phosphate rock" according to the equation: