Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
Why is it important to make sure that all of the water has been driven from the solution during the synthesis of the nitrophthalicacid product?
As a lab technician for a pharmaceutical comapny, you areresponsible for preparing hot packs and cold packs. A hot packinvolves a release of heat when a salt and water are mixed. A coldpack becomes
A wooden object from a prehistoric site has a carbon-14 activity of 10 counts per minute (cpm) compared to 40 cpm for new wood. If carbon-14 has a half-life of 5730 years, what is the age of the wo
The gold-198 isotope is used in the treatment of brain, prostrate,and ovarian cancer. Au-198 has a half-life of 2.69 d. If a hospital needs to have 75 mg of Au-198 on hand for treatments on a partic
If [FeF6]3- is a high spin complex and[Fe(CN)6]3- is a low spin complex, how many unpaired electrons are present in the two complex ions respectively?
The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year^-1. What fraction of the tritium initially in a sample is still present 30 years later?
A 0.89% (w/v) sodium chloridesolution is referred to as physiological saline solution because ithas the same concentration of salts as human blood. What is the molarity of a physiological saline sol
Calculate the pH at the equivalence point for the titration of 20.0mL of 1.00 M HF with 0.500 M NaOH. Ka=3.5x10-4 for HF.
In a particular reaction between copper metal and silvernitrate, 12.7 g Cu produced 18.1 g Ag. What is the percent yield of silver in this reaction?
Metallic copper is formed when aluminum reacts with copper(II) sulfate. How many grams of metallic copper can be obtained when 54.0 g of Al react with 319 g ofCuSO4?
A 35.0-L tank contains 7.00 mol of compressed gas. If the pressure inside the tank is 500.0 kPa, what is the temperature of the compressed gas.
Indicate the signs of the electrodes.D.) Do the electrons flow from the Zinc electrode to thenickel electrode or from the nickel to the zinc?E.) In which direction do the cations and the anions migr
To obtain water each day a bird in the winter eats 5.00g of snowat 0 degree C. How many kilocalories of energy does it take to melt the snow and warm the liquid to the body temperature of the bird a
The label on liquid Gaviscon states that each tablespoon (15mL) contains 95 mg of aluminum hydroxide and 412 mg of magnesiumcarbonate. How many moles of hydronium ion can be neutralized by one tabl
A reaction in solution, A+B-->P, is studied and found to havethe rate law: Rate = k[A] with a rate constant of 3.5 x 10-3 s-1.
What is the pH of a buffer that is 0.175M in a weak acid and 0.213M in the acid's conjugate base? The acids ionization constant is 5.7 * 10-4.
A weather balloon is prepared for lift off at the NorthPole. The balloon is filled with 15,000 L of heliumgas. The conditions at the launch site are 760 mm Hg and0*C.
Assuming that brackish water has the same density as pure water and containsonly sodium chloride, estimate the osmotic pressure of brackish water at 298 K.
Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane(C4H10) at 20 °C and 203 mmHg. (R=0.082 L-atm/K mol)
A solution was made by adding 75.0 g of sucrose (C12H22O11) to500.0 g of water at 20 degrees C. How much is the vapor pressure of the solution reduced from that of water by the addition of the sucro
The bulb of a pipet is placed into hot water and is left for 2minutes. The pipet is then flipped over into cool water. Water is then pulled into the pipet.
Calculate the amount of heat in kilojoules needed to heat 346g of liquid water from 0C to 182C. Assume the specific heat of liquid water is 4.184 J/g x C and that steam is 1.99 J/g x C
A transition metal compound contains a cobalt ion, chloride ions,and water molecules. The H2O molecules are the ligandsin the complex ion and the Cl ‾ ions are the counterions.
Calculate the Gibbs energy of activation, the entropy of activation, and the enthalpy of activation for this decomposition (at 60o C)
A 75.0 g sample of a solution known to contain 23.8 g of glucose. Calculate the mass percent of glucose in the solution.