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most scientists agree that the earth is 4.5 billion years old. 50 years from noe, how many sig figs will we record in the age of the earth
f the water if brought to the vapour state at 204C and 710 KPa, where its enthalpy is 2649.4 KJ/Kg and its specific volume is 291.8 cm^3/g, what is the internal energy (U) at these conditions in KJ/Kg? c) Calculate the change in internal energy (d..
moist air exerts lower pressure and dry air exerts high pressure. how would the volume of the hydrogen gas that was ollectes been different if this eperiment was done on a very rainy day/ on a very dry day?
Give equations for the reaction of salicylic acid with the following: a) acetyl chloride/pyridine b) methanol/HCl/heat c) sodium bicarbonate, room temperature
A manometer shows a mercury level of 225 mm Hg on the closed end of the tube and 108 mm Hg on the open end. If the atmospheric pressure is 760 torr,
Calculate the concentration of HC2H3O2 or NH3 in each of the solutions you measured. By how many units did the pH of a solution of a weak base or acid
The water is analyzed and found to be 735 ppm in phosphate ion. What is the % phosphate ion in the dry detergent? What is the % phosphorus in the dry detergent? How many grams of phosphate are in the 300. g sample?
Briefly explain why you would expect benzoic acid to be soluble in the two solvents water and dicloromethane
Draw one energy diagram showing both reaction pathways & label all transition states, intermediates and products as well as activation energies. you may assume that the overall reactions are both exergonic while the first step in each reaction is ..
what volume of liquid benzene must be vaporized to give that average concentration in a room
How long will it take for 100% pearlite to form at 650 °C and at 600 °C? Estimate the hardness values resulting from these transformations.
The tank can hold a pressure of 50.0 atm before bursting. During a fire the gas is heated to 500 C. What is the gas pressure, and will the tank contain the gas without bursting
What is the pH of a buffer solution containing 0.155 mol dm-3 of benzoic acid and 0.315 mol dm-3 sodium benzoate.
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