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A tablet of vitamin C was analyzed to determine whether it did in fact contain, as the manufacturer claimed, 1 g of the vita-min. One tablet was dissolved in water toform 100 mL of solution, and 10
The pain reliever phenacetin is soluble in cold water to the extent of 1.0 g/ 1310 mL and soluble in diethyl ether to the extent of 1.0 g/90 mL.
Because anhydrous sodium sulfate is a relatively inefficient drying agent, a student uses twice as much of this salt as recommended. What are the advantages and disadvantages of adding extra drying
A mixture of immiscible liquids (both water-insoluble) is subjected to steam distillation. At 90 degrees C, the vapor pressure of pure water is 526 mm Hg.
The same calorimeter was used for the dissolution of 8.86 g sample of lithium chloride in 100.0 mL of water at 22.2 °C. When the salt was dissolved, the temperature of the solution was 39.5°
A 192 g piece of copper is heated to 100.0C in a boiling water bath and then dropped into a beaker containing 75.0 ml of water at 4.0C. What is the final temperature of the copper and water after th
As a system increases in volume, it absorbs 52.5 J of energy in the form of heat from the surroundings. The piston is working against a pressure of 0.500 atm. The final volume of the system is 58.0
The average osmotic pressure of human blood versus water is 7.60atm at a temperature of T=310K. Calculate the total solute concentration in human blood.
Calculate the change in freezing point of water if 0.0053g of a protein with molecular weight 10083g/mol is dissolved in 100mL of water.
The sludge has to be dried before it can be composted or otherwise handled.If sludge containing 70% water and 30% solids is passed through a drier and the resulting product contains 25 % water, how
When 96.4 g of god at some temperature is added to 25.0 g of water at 23.4 C in a calorimeter, the final temperature of the resulting mixture is 26.8 C.
What kind of subshell is being being filled in Groups IA and IIA? in Groups IIIA to VIIIA? in the transition elements? in the lanthanides and actinides?
Which of the following ions would you expect to be paramagnetic: O2+, N2 2-, Li2+, O2 2-? ? ??For those ions that are paramagnetic, determine the number of unpaired electrons.
Why is the ground term of a D8 metal complex F3? what are the possible orbital transitions that can happen in the UV-Vis spec according to the Tanabe-sugano diagram.
Gout is caused by an error in nucleic acid metabolism that leads to a buildup of uric acid in body fluids, which is deposited as slightly soluble sodium urate (C5H3N4O3Na) in the soft tissues of joi
A small community has used an unchlorinated well water supply containing approximately 0.3 mg/l of iron and manganese for several years without any apparent iron and manganese problems.
The dynamic range maybe a useful parameter of any spectroscopic system and is the very important parameter of the measurement system. There exists some applications (spectral analysis, nuclear magne
A radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz ({\rm MHz}), where 1\; {\rm MHz}=10^6\; {\rm Hz}. Calculate the broadcast wavelength of the radio stat
The rusting of iron is represented by the equation 4Fe + 3O2 ? 2Fe2O3. If you have a 1.30-mol sample of iron, how many moles of Fe2O3 will there be after the iron has rusted completely?
If you look up the melting point of phenylsuccinic acid, you will find it to be 167-169 degree. Your product probably melting at a higher temperature. How do you account for this apparent discrepanc
The bright yellow light emitted by a sodium vapor lamp consists of two emission lines at 589.0 and 589.6 nm. What are the frequency and the energy of a photon of light at each of these wavelengths?
An experiment was performed using HCl. We wrote down the molarity on the bottle and then used a pH meter to find the pH. From the pH we then calculated the [H+] (hydrogen ion concentration) from the
A platinum ball weighing 15.1 g is removed from a furnace and dropped into a 305 g of water at 15°C. If the equilibrium temperature is 22ºC and the specific heat of platinum is 0.401J/(g&o
A series of solutions were prepared, each containing exactly one mole of water (MW 18.015) and varying amounts of acetone (MW 58.081) at 20°C.