Get college assignment help at uniessay writers Consider the following unbalanced reaction. P4(s) F2(g) PF3(g) How many grams of F2 are needed to produce 164 g of PF3 if the reaction has a 74.0% yield?
A fishing boat accidentally spills 15 barrels of diesel oil into the ocean. Each barrel contains 42 gallons. If the oil film on the ocean is 2.5 × 10^2 nm thick, how many square meters will the oil slick cover?
A graduated cylinder contains 155 of water. A 19.0 piece of iron (density = 7.86 ) and a 18.0 piece of lead are added. What is the new water level in the cylinder?
A calorimeter contains 27.0 of water at 11.0. When 1.30 of (a substance with a molar mass of 53.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 27.0. Calculate the enthalpy change, , for this reaction per mole of . Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 and 1.00 ] and that no heat is lost to the calorimeter itself, nor to the surroundings.
A proposed mechanism for a reaction is C4H9Br à C4H9 Br- SLOW C4H9 H2O à C4H9OH2 FAST C4H9OH2 H2O à C4H9OH H3O FAST a. Write the rate law expected for this mechanism. Support your answer. b. What are the intermediates in the proposed mechanism?
The pH of a 0.10 mol/dm3 solution of HCL is 1.0, but the Ph for CH3CO2H is 2.4. Whem 100cm3 of 0.10 mol/dm3 CH3CO2H reacts with excess of zinc powder the volume of hydrogen evolved is same as whem 0.10mol/dm3 Hcl is used. Suggest an explanation.
What is the molarity of a solution that contains 42.0g of vitamin B1 hydrochloride (molar mass = 337g/mol) in 190mL of solution?
CO3-2: Steric Number Electron Geometry Molecular Geometry Bond Angle
The specific heat of ethylene glycol is 2.42 J/g-K. How many J of heat are needed to raise the temperature of 62 g of ethylene glycol from 13.1 degrees C to 40.5 degrees C?
a solution is prepared by mixing 500mL of .10 M NaOCl and 500mL of .20M HOCl. What is the pH of this solution? (Ka (HOCl) is .000000032.
Get college assignment help at uniessay writers What is the normality of 23.0g LiOH dissolved in 456ml of solution?
Imagine that you have a 7.00 gas tank and a 4.00 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 , to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.
how much heat is required to warm 1.50Kg of sand from 25.0 degree celcius to 100.0 degree celcius?
When sulfuric acid is a componenet of polluted air, it chemically attacks statues, memorials, and monuments made from limestone. Given that the most common mineral in limestone is calcium carbonate, described how these limestone objects are corroded by the sulfuric acid in polluted air. What chemical reaction is involoved here?
A 1.00 x 10^-3 solution of pyrrolidine, C4H9N, has a pH= 10.82. Calculate Kb. I got Kb as 1.29 x 10^-3. Could you confirm?
For the reaction ?C6H6 ?O2 → ?CO2 ?H2O 43.1 grams of C6H6 are mixed with 113.2 grams of O2 and allowed to react. How much CO2 could be produced by this reaction? 1. 165.7 g 2. 99.68 g 3. 155.8 g 4. 193.1 g 5. 145.7 g 6. 89 g 7. 106.5 g 8. 124.6 g 9. 261.7 g 10. 235.5 g
Consider the following reaction: CaCN2 3H2O → CaCO3 2NH3 105.0 g CaCN2 and 78.0 g H2O are reacted. Assuming 100% efficiency, which reactant is in excess and how much is leftover? The molar mass of CaCN2 is 80.11 g/mol. The molar mass of CaCO3 is 100.09 g/mol. 1. H2O; 7.20 g left over 2. H2O; 70.8 g left over 3. CaCN2; 10.7 g left over 4. CaCN2; 7.20 g left over 5. H2O; 10.7 g left over 6. CaCN2; 70.8 g left over
In the reaction CH4 2O2 → CO2 2H2O how much oxygen is required to burn 8.0 g of methane? 1. 0.5 mol 2. 1.0 mol 3. 32 mol 4. 2.0 mol
A balloon of helium whose volume is 2.20 L at 25°C is cooled by pouring liquid N2 over it. The final temperature of the balloon is -196°C. What is the final volume, in L?
# A 100. mL sample of 0.200 M aqueous hydrochloric acid is added to 100. mL of 0.200 M aqueous ammonia in a open calorimeter having a negligible heat capactity. The following reaction occurs when the two solutions are mixed. HCl(aq) NH3(aq) → NH4Cl(aq) After mixing the temperature increases 3.68 °C. Assuming that the specific heat and density of the aqueous mixture is the same as that for pure water (4.184 J/g °C and 1.00 g/mL, respectively), calculate ΔH for the reaction as written. Answer −154 kJ/mol 154 kJ/mol 38.5 kJ/mol 77.0 kJ/mol −77.0 kJ/mol
The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione, better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood. Luminol is so sensitive that it can detect blood that has been diluted 10,000 times. A basic solution of luminol is often sprayed onto surfaces that are suspected of containing minute amounts of blood. Luminol has a molecular weight of 177 . The forensic technician at a crime scene has just prepared a luminol stock solution by adding 17.0 of luminol to creating a solution with a total volume of 75.0 . What is the molarity of the stock solution of luminol?
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