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Draw an arrow pushing mechanism for the formation of the acylium ion when acetic anhydride reacts with phosphoric acid.
Write a thermochemical equation including the energy term as part of the equation. the combustion of butane in candle lighter is -2.86 MJ/mol.
a certain gas is present in a 15.0L cylinder at 1.0atm pressure. If the pressure is increased to 2.0atm the volume of the gas decreases to 7.5L. Find the two constants k, the initial value of k and
Suggest reasonable synthetic route for the preparation of 2-methyl-3-phenyl-2-propan-1-ol from benzaldehyde
A saturated single monolayer of CO is absorbed on a tungsten surface has a mass per unit area of 4.65x10^(-8) g/cm^2. Assume that the width of the CO molecule is the diameter of a circle inscribed i
An excess of AgNO3 reacts with 110.5 mL of an AlCl3 solution to give 0.215 g of AgCl. What is the concentration, in moles per liter, of the AlCl3 solution?
How many liters of nitrogen gas are in a closed room measuring 12feet by 14feet by 10feet? The partial pressure of nitrogen in the atmosphere at 1atm is 0.80atm and partial pressure of oxygen is 0.
The total pressure of the vessel is 5.50atm and the mole fraction of xenon is 0.751mol. What is the partial pressure of xenon and neon in atm? What is the number of moles of xenon and neon?
A balloon filled with helium gas at 20C occupies 2.91 L at 1.00 atm. The balloon is immersed in liquid nitrogen at -196C, raising the pressure to 5.20 atm. What is the volume of the balloon in the l
Element Z has two naturally occurring isotopes Z-79 ( 78.918 amu) and Z-81 (80.916 amu) . Calculate the atomic mass of element Z given the abundance of the Z-81 is 49.31 %
Suppose the reaction Ca3(PO4)2 + 3H2SO4 ------ > 3CaSO4 + 2H3PO4 is carried out starting with 103 g of Ca3(PO4)2 and 33.7 g of H2SO4. How much phosphoric acid (H3PO4) will be produced?
As the gas contracted, ethanol was forced into the vessel to maintain the same pressure of helium. If this required 16.2 cm3 of ethanol, what was the final temperature of the helium?
Equilibrium vapor pressure of water at 30 degrees Celsius is 31.82mmHg. What is the partial pressure of water in atm in the atmosphere on this day?
This reaction is sometimes used to inflate life rafts, weather balloons, and the like, where a simple, compact means of generating H2 is desired. How many grams of CaH2 are needed to generate 19.0 L
Calculate the osmotic pressure (in torr) of 6.00 L of an aqueous 0.779 M solution at 30.oC, if the solute concerned is totally ionized into three ions (e.g., it could be Na2SO4 or MgCl2).
A student titrates 0.738 grams of an unknown solid, weak acid with 0.1027 Molarity NaOH. What is the molecular weight of the unknown solid, weak acid?
Classify the liquids that she has consumed as acidic or alkaline. State the pH values of water and blood. State what the patient can include and avoid in her diet on a regular basis to avoid these sym
the molar heat capacity of silver is 25.35 rm J/mol * C. How much energy would it take to raise the temperature of 8.60 g of silver by 11.1 C?
You have constructed a hydroquinone concentration cell (below) with buffers of pH = 10 and pH = 2. Using the Nernst equation, calculate the cell potential for this electrochemical cell.
At a certain temperature and pressure 1.4 L of N2 reacts with 2.1 L of O2. If all the N2 and O2 are consumed, what volume of N2O3, at the same temperature and pressure, will be produced?
The quantity of the gas is fixed and the volume remains constant as the pressure is adjusted to 6.00 ´ 102 torr. What is the resulting temperature of the gas?
Calculate the mass of KI in grams required to prepare 8.00 102 mL of a 2.80 M solution
How many grams of calcium (m.w. = 40.1g) is needed to react with 41.5g Cl (m.w. = 35.5g) to produce CaCl2?
If the solubility of benzoic acid is 6.80g per 100mL of water at 100 degrees celsius and 0.35g per 100mL of water at 25 degrees C.