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A student placed 17.5 g of glucose in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100 mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 40.0 mL sample of this glucose solution was diluted to 0.500 L . How many grams of glucose are in 100. ml of the final solution?
What is the boiling point of acetone at an elevation where the external pressure is 323 torr?
What is the osmotic pressure of a solution made from dissolving 90.0 g of glucose, rm C_6H_{12}O_6, in 650 mL of water at 14.0{^circ}C.
A 20.0 mL sample of vinegar, which is an aqueous solution of acetic acid, , requires 19.5 mL of 0.700 M NaOH to reach the endpoint in a titration. What is the molarity of the acetic acid solution
describe each reaction and provide the name of all the chemical formula involved for each number.1.na2co3s sio2s -gt
For the concentration of hydroxyl radical of 7.5E06 molecules/cm3 and a carbon monoxide concentration of 18 ppm, calculate the rate of its reaction with atmospheric carbon monoxide at 11 degrees C.
A gaseous reaction occurs at a constant pressure of 50.0atm atm and releases 74.8kJ kJ of heat. Before the reaction, the volume of the system
adding a few drops of a strong acid to water will lower the pH appreciably. however, adding the same number of drops to a buffer does not appreciably alter the pH. why
the water level in a graduated cylinder initially at 221 rises to 271 after a piece of lead is submerged. what is the
A mixture of 8.0mol of H2 (g) and 4.0mol of O2 (g) is placed in a sealed evacuated container made of a perfect insulating material at 28 degrees C. The mixture is ignited with a spark and it reacts to form liquid water. Find the temperature of the..
A piece of sodium metal reacts completely with water as follows. 2 Na(s) + 2 H2O(l) ->2 NaOH(aq) + H2(g) The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 295 mL measured at 1.00 atm.
Methane is burned in a Laboratory Bunsen burner to give CO2 and water vapor. Methane gas is supplied to the burner at the rate of 5.0 L/ min ( at temperature of 28° C and a pressure of 773 mm Hg).
Calculate the molar concentration of OH - ions in an 1.43 M solution of hypobromite ion, BrO- (Kb = 4.0 10-6).
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