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An organic compound had the following analysis: C=55.8% and H=7.03%. A 1.500g sample was vaporized collected over water and found to occupy 0.500L at 100C and 764 mmHg. (vapor pressure is at 100C is
What is the hybridization and geometry of the carbonyl carbon in carboxylic acids and their derivatives? 11) A) sp3, trigonal planar B) sp2, trigonal planar C) sp3, tetrahedral D) sp2, tetrahedral E
A 0.150-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium? Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
A city's water supply is fluoridated by adding NaF.The desired concentration of F- is 1.6ppm.How many milligrams of Naf should be added per gallon of treated water if the water supply is 0.2 ppm in
In an acid-base neutralization reaction between 100.0 mL of 0.5 M nitric acid (HNO3) and 100.0 mL of 0.5 M potassium hydroxide (KOH), qrxn was found to be -5000 J. what is the enthalpy change per mo
Allylchloride, Why it is easy to remove the Cl from allylchloride?
A 10.0 liter gas cylinder is filled with N2 to a pressure of 75.0 atmospheres. How many moles of N2 does one have to add to raise the pressure to 125 atmospheres. Assume a constant temperature of 25
Boiling point of water at 750 mm Hg is 99.63C. Calculate the amount of sucrose to be added to 500 g of water such that it boils at 100C. kb=0.52 k kg/mol
What is the calculated pH of the solution if there is initially 2.0mL of acetic acid at an initial concentration of 0.89M and 0.80mL of 1.0M HCl is added?
A 100.0 mL sample of 0.18 M HClO4 is titrated with 0.27 M LiOH. Determine the pH of the solution before the addition of any LiOH.
Ethylene glycol, the main component of automotive engine coolant, has a specific heat of 2.35 J/g.oC. Calculate the amount of heat required to raise the temperature of 1.00 kg of ethylene glycol fro
A refrigerator has a coefficient of performance of 4. If the refrigerator absorbs 30 cal of heat from the cold reservoir in each cycle, what is the heat expelled (in cal) into the heat reservoir ?
How many grams of water must be added to 519.5 grams of methanol (CH3OH) at 20°C to have an osmotic pressure of 408 mm of Hg? Methanol has a density of 0.8921 g/mL.
The electrolysis of 0.250 L of a brine solution (NaCl) was carried out for a period of 20.00 min with a current of 2.00 A in an apparatus that prevented Cl2 from reacting with other products of the
How many grams of dry NH4Cl need to be added to 2.30L of a 0.300M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.85?
Assuming all gases are at the same temperature and pressure, how many liters of carbon dioxide are produced from 15.0L of CO?
A 25.0 ml sample of 0.200 M benzoic acid is mixed with a 100 m sample of 0.400M NH3. What is the PH of this solution.
carbonate buffers are important in regulating PH of blood at 7.40. What is the concentration of CO2 in a 0.200M NaHCO3 at PH=7.40 ?
Kc=0.0420. The concentration of the products at equilibrium are [PCl3]=0.160 M, and [Cl2]=0.230 M. What is the concentration of the reactant PCl5 at equilibrium?
What is the emf of this cell when [Fe2+]= 1.5M , [Fe3+]= 1.8×10-2M , PO2= 0.47atm and the pH of the solution in the cathode compartment is 2.7?
The reported values for one compound (CxHyOz) were as follows: mass: 214.1360 g/mol; percent carbon and hydrogen: 84.07 and 8.47, respectively. What is the molecular formula of the compo
A solution is made by adding 1.24 mol KCl to 1399.0 g of water. What is the percent by mass of KCl in this solution?
If 31.7mL of 0.235M KOH is required to completely neutralize 26.0mL of a HC 2 H 3 O 2 solution, what is the molarity of the acetic acid solution?
A 1-L flask is filled with 1.45g of argon at 25 °C. A sample of ethane vapor is added to the same flask until the total pressure is 1.10atm. What is the partial pressure of argon, PAr, in the flask?