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Formalin is an aqueous solution of formaldehyde, HCHO, used as a preservative. How many grams of formaldehyde must be used to prepare 2.5 L of 12.3 M solution
celcius of a solution prepared by dissolving 0.0550 mole of a sodium acetate in 1.00 L of 0.250 M acetic acid.
Pure olive oil has an iodine value of about 85. A very old sample or originally pure olive oil is found to have an iodine value of 55. Explain
B2H6 + 3O2= B2O3+3H2O ;DELTA H=-2035KJ how much heat is released when a mixture of 7.35 g B2H6 and 2.60 g O2 is burned?
Acetylene, C2H2, can be converted to ethane, C2H6, by a processknown as hydrogenation. The reaction is
When CO2 is bubbled through an ether solution of benzylmagnesium bromide, and the resulting mixture is acidified, phenylacetic acid is produced.
Calculate the pH after 10.0, 20.0, 30.0, and 40.0 ml of 0.100M NaOH have been added to 40.0ml of 0.100M HClO.
Choose the element with more negative (more exothermic) electron affinity from each of the following pairs.
One isotope has a mass of 44.0 amu and has a neutral abundace of 69.5% while the other isotope with the mass of 46.08 amu.
How much energy in J is needed to convert 48 g of liquid ethanol at 67 oC to vapor at 97oC. You might need to know that: mp = -114 oC and bp = 78oC The heat of fusion is 4.6 kJ/mol and the heat of vaporization is 46.0 kJ/mol. Finally, the specific..
Calculate the final temperature of 33 ml of ethanol initially at 20 degrees Celsius upon absorption of 541 J of heat. (density of ethanol =0.789 g/ml)?
In a gas mixture the partial pressures are nitrogen 425 torr, oxigen 115 torr, and hellium 225 torr. What is the total pressure (atm) exerted by the gas mixture?
For each of the following unbalanced equations, indicate how many moles of the second reactant would be required to react exactly with 0.275 mol of the first reactant. Show all work below.
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