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What mass of O2 is required for the complete combustion of 68.9 g of pentane, C5H12, to CO2 and H2O?
Wastewater flow in a sewer can be estimated by adding a known amount of tracer such as salt solution and measuring the salt concentration upstream and downstream of the point of addition.
At 25oC, the acid dissociation constant for hypochlorous acid HOCl is 3.5E-8. Calculate the concentration of the hydronium ion in an aqueous solution of 0.30M HOCl.
pH = log[H3O+] , pH + pOH = 14, [H3O+] * [OH-] = 1.0 X 10^-14, pH = -log(0.001) = 3 Could you show me a few of the steps between line one and two in both of these conclusions?
A student is presented with a sample of an unknown substance and asked to classify the substance as organic or inorganic
A 97 gram solution of silver nitrate contains 10 grams of AgNO3. What is the percent by mass of silver nitrate in this solution. Answer in units of %
A solution is made by mixing 506 mL of water and 198 mL ethanol. What is the concentration of ethanol in units of volume/volume percent.
.At 25°C and 1.0 atm, 0.25 g of a gas dissolves in 1.00 L of water. What mass of the gas dissolves in 1.00 L of water at 25°C and 3.0 atm?
Pure gold can be made into extremely thin sheets called gold leaf. Suppose that 5.0 x 102 kg of gold is made into gold leaf having an area of 3620 m2.
The air in the balloon is then heated to 62 degree celsius, causing the balloon to expand to a volume of 4.20x10^3 m^3. What is the ratio of the number of moles of air.
Which thermodynamic factor is the most significant in accounting for the fact that phophoric acid is a weak acid? why? Please make sure it is answered completely and explained so I can learn how to do it.
Using Acid Chlorides to Prepare Aromatic Ketones, Acid chlorides are used as electrophiles in the Friedel-Crafts reaction to prepare aromatic ketones. The reaction involves the transfer of an aromatic hydrocarbon with an acyl chloride in the prese..
An endothermic chemical reaction with ?E = +41 kJ/mol has an activation energy of +95 kJ/mol. What is the activation energy for the reverse reaction?
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