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When 1.5173 g of an organic iron compound containing C, H, O, and Fe was burned in O2, 2.838 g of CO2 and 0.8122 g of H2O were produced. In a separate experiment to determine the mass % of iron, 0.3355 g of the compound yielded 0.0758 g of Fe2O3. What is the empirical formula of the compound?
There are three containers all connected to each other. There are a total of six particles inside the containers, two in one container, four in another container, the third container is empty. Upon changing the conditions,
what percentage of the original ag remains in solution when 180 ml 2.10times10-2 m agno3 is added to 240 ml
The temperature in the freezer compartment of a household refrigerator is kept at 0 F. On a summer day the ambient temperature is 92 F. The effective performance factor for the refrigerator (qc/w where qc is the heat removed from the frozen food c..
A solution of ammonia and water contains 3.20×10^25 water molecules and 8.10×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
One can approximate boiling point at reduced pressure using a pressure-temperature nomograph. What would you expect the observed boiling point to be at 50 torr for a liquid that has a boiling point of 280 degrees celsius at 760 torr
What effect does adding an enzyme to a reaction have on this? On delta G? What are the roles of delta G in biochemical reactions (list two)?
the molar heat of vaporization of acetic acid hc2h3o2 is 24.3 kj mol-1 at its boiling point. how many kilojoules of
A mixture of gas contains 46.3 % methane, 37.2% ethane and 16.5% propane(by mass). A 477g sample of the gass is burned with exces oxygen
You are on a backpacking trip and need to make a fire. You have some batteries and a piece of foil from some gum. These should be sufficient to get the fire going.
An enzyme-catalyzed reaction was carried out in a 0.2M "Tris" buffer, pH 7.8. As a result of the reaction, 0.03 mole/liter of H+ was produced. (pKa of Tris =8.1). What was the ratio of Tris+
Explain why in an aqueous electrochemical cell, nitrate ions never react at the anode, but nitrite ions do
The molar heat of vaporization of ethanol is 39.9 kJ/mol and the boiling point of ethanol is 78.3°C. Calculate ?S for the vaporization of 0.50 mol ethanol.
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