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Considering the given equation 4Fe(s) + 3O2(g) = 2Fe2O3(s) compute the amount of heat evolved in the oxidation of 32.0 grams of Fe at the temperature 25 oC and pressure 1 atm pressure ( ΔHfo(Fe2O 3,s) = -824kJ/mol)
specify which indicator or indicators you would use for the following titrations. thymol blue, bromophenol blue, methyl orange, methyl red, chlorophenol blue, bromothymol blue, cresol red, phenolphthalein.
The rate constant of a reaction is 7.50*10-5 L/mol·s at 195°C and 5.30*10-3 L/mol·s at 258°C. What is the activation energy of the reaction, in kJ/mol
A physician wrote a prescription for Tylenol 325 mg/5mL with codeine 10 mg/5mL, 5mL three times a day for 4 days as needed for cough. How much Tylenol in milligrams is contained in a teaspoonful?
How can the molarity of chloride ion be calculated when 16 mL (2 mL intervals) of 12 M HCL is added to 5 mL of 0.4 M CO(NO3)2?
Assuming the bag does not break, what will be its volume at the top of a mountain where the pressure is 436 mmHg and the temperature is 9.00 C?
a 75.0 ml sample of .0500M HCN is titrated with .500 M NaOH. what is the concentration of H+ in the solution after 3.0 ml of .500 M NaOH has been added
Mixtures of diastereomeric 1,3-dimethylcyclopentanes are formed on catalytic hydrogenation of all but one of the following. Which compound gives only a single stereoisomer of 1,3-methylcyclopentane
A 10.0 long cylindrical glass tube, sealed at one end, is filled with ethanol. The mass of ethanol needed to fill the tube is found to be 11.90 . The density of ethanol is 0.789 . what is the inner diameter of cylinder?
In a solution of glucose and water, if 4.5% of the mass is glucose, how many grams of the solution contain 2.25 g glucose ?
Ozone (O3) and )2 have a kc= 6.32 *10^37 in the reaction below, if a container is filled with a concentration of .0500 M O2 (and no ozone), what will be the concentration of ozone when the system comes to equilibrium
Iron has a BCC crystal structure, an atomic radius of 0.124 nm, and an atomic weight of 55.85 g/mol. Compute and compare its density with the actual value of 7.87
which of the following aqueous solutions will freeze at the lowest temperature? a. 0.10 m KCl, b. 0.20 m C6H12O6 (glucose), c. 0.050 m AlCl3, d. 0.15 m SrBr2, e. all of the above freeze at the same temperature
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