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A peroxidase enzyme isolated from human red blood cells was found to contain 0.29% selenium. What is the minimum molar mass of the enzyme?
The value of delta E for a system that performs 213 kJ of work on its surroundings and loses 79 kJ of heat is kJ
Determine the exact formula of the compound. When 9.64x10-4 moles of this complex is dissolved into 425.0 mL of the water, you find that 19.22 mL of 0.1000 M HCl is needed to reach a titration endpoint
How much heat is produced in burning 9 mol of ethylene (C2H4) under standard conditions if reactants and products are brought to 298K and H2O (l) is formed
Because of increasing evidence of damage to the ozone layer, chlorofluorocarbon (CFC) production was banned in 1996. However, there are about 100 million auto air conditioners that still use CFC-12 (CF2Cl2). These air conditioners are recharged fr..
how much heat is released when 75.0 g of steam at 100.0°C is cooled to ice at -15.0°C? The enthalpy of vaporization of water is 40.67 kJ/mol
The resulting W3 was transferred to 500.0 mL of 1.00 M HCl. A 100.00 mL aliquot of the HCl solution required 10.02 mL of 0.09352 M potassium permanganate (KMnO4) to reach the purple endpoint. A blank required 0.13 mL. Balance the reaction below an..
How many grams of sodium sulfide are formed if 1.60 g of hydrogen sulfide is bubbled into a solution containing 2.13 g of sodium hydroxide, assuming that the sodium sulfide is made in 94.0 % yield?
Which of the following equations represents the proper net ionic equation for the complete neutralization reaction between the weak acid HClO2 (aq) and the strong base NaOH (aq)
When the stopper is removed from a partly filled bottle containing solid and liquid acetic acid at 16.7degrees C a strong vinagerable odor is noticeable immediately. How many acetic acid phases must be present in bottle. Explain.
Draw the structural formula for ethanol, 2-propanol and 2-methyl2-propanol. Write the reaction between sodium bicarbonate and benzoic acid.
If the activation energy to prepare a hard boiled egg is 286 KJ, determine how long it would take to prepare a " 3 minute egg " at the top of a mountain where the atmospheric pressure is only 578 torr.
In a combustion experiment, .73g of an unknown hydrocarbon was burned in the presence of excess oxygen. This reaction produced .452 g CO2 and .087 g H2O. How many moles of carbon were in the original hydrocarbon sample
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