Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
A 2.216 g sample is dissolved in 48.68 g water and the solution is found to have a b.p of 100.068 oC What is molecular formula of conifer?
A solution of 1.00 g of a protein in 20.0 ml of water has an osmotic pressure of 35.2 torr at 298 K. Calculate the molar mass of the protein.
In the reaction mixture at equilibrium, the partialpressure of NO3 is 9.28torr and that of Br2 is 2.74torr. Find the partial pressure of NO in this mixture.
How much (volume in mL) 6.00 M NH4OH can be addedto an equal molar buffer prepared from 1.50 mol each of sodium formate and formic acid before exceeding rule of thumb for the buffering range of this
Hydroxylation of trans-2-butene with OsO4 also yields 2,3-butadiol. What stereo chemistry do you expect for the product? Explain why this is the answer.
The reaction between ethyl iodide and hydroxide ion in ethanol(C2H5OH) solutionC2H5I+OH=C2H5OH+Ihas an activation energy of 86.8KJ/mol and a frequency factorof 2.10*10^11 M^(-1)S^(-1)Q:
Suppose that in starting a car on a cold morning a current of 125 amperes is drawn for 15.0 seconds from a cell of the type described above.
The structure of O-aminobenzoic acid can be determined by titration with 0.2M sodium hydroxide. How many mL of base would be needed to neutralize 0.5 g of starting material?
The reaction A + 2B yields products has been found to havethe rate law, rate= k[A] [B]2. While holding the concentration of A constant the concentration of B is increased from x to 3x. Predict by wh
A cell is set up with copper and lead electrodes in contact with CuSO4(aq) and Pb(NO3)2(aq), respectively, at 25°C.
Dinitrogen tetraoxide, N2O4, decomposes to nitrogen dioxide, NO2,in a first-order process. If k = 2.5 × 103 s-1 at -5°Cand k = 3.5 × 104 s-1 at 25°C, what is the activation energ
Calculate the volume of gas produced if your known sample vaporizes completely at your highest temperature for the known(disregard the air). You will need to look up the density and molecular weight
One of the oldest chemical reactions known to man is the saponification reaction. All the carboxylic derivatives under go this type of reaction, but it is most commonly used for esters.
When an acid chloride or acid anhydride is used to prepare an amide two equivalents of amide are required. Write reactions that can explain this.
If the amine is valuable then slightly more than 1equivalent of a 3 degree (tertiary) amine, such as triethylamine orpyridine is added.
A saturated solution contains 10.8 g KCl in 30.0mL of water at 25degrees C. What is the solubility in g solute/(100 gH2O)? Calculate the mole fraction of solute at this temperature.
The elements X, Y, and Z form these compounds:XCl4, XZ2, and YO. What formula would you predict for the compound formed between Y and Z? Assume normal oxidation states for chlorine and oxygen.
Select the commonly used food items. Include grains,vegetables, and fruits. Compare the prices of conventionally grown and organically grown crops for these food items.
How much heat does your body lose when 2.95 g of sweat evaporatesfrom your skin at 25oC? (Assume that the sweat is onlywater).
The Vapor pressureof a solution containing 36 g of calcium phosphate in 45 g ethanol was calculated to 18000 Pascals at 40 °C. Calculate the vapor pressure of pure ethanol at40°C. If the rea
Linear, Trigonal Planar, Angular, Tetrahedral, Trigonal Pyramidal,which molecular geometry are polar and which are non polar. Alsowhat is the easiest way to determine the polarity of a molecule.
A 2.14-L sample of hydrogen chloride(HCl) gas at 2.61 atm and 301Kis completely dissolved in 668mL of water to form hydrochloric acidsolution. Calculate the molarity of the acid solution. Assume no
A concentration of 8.00 x 102 ppm by volume of COis considered lethal to humans. Calculate the minimum mass of CO ingrams that would become a lethal concentration in a closed room17.6 m long,
A 1.00 g sample of NH4NO3 is decomposedin a bomb calorimeter. The temperature increases by 6.12°C.What is the molar heat of decomposition for ammonium nitrate? Molar mass, NH4NO3 80.0
Identify the limiting reactantc) Predict the appearence of the substances left in the reaction container once the reaction is compleate.