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One of the students in lab decided to use two fractionating columns (one on top of the other) instead of just one. How would this
a) affect the separation between hexane and heptane?
B) affect the yield of recovered pure hexane?
And C) affect the ield of recovered pure heptane.
Explain your reasoning.
Calculate the heat released when 2.57 L of Cl2(g) with a density of 1.88 g/L reacts with an excess of sodium metal at 25°C and 1 atm to form sodium chloride.
Calcium phosphate, silicon dioxide, and coke may be heated together in an electric furnace to produce phosphorus, as shown in the following equation: 2Ca3(Po4)2+6SiO2+10C=6CaSiO3+10CO +P4
The reading on the tank pressure initially rises very quickly then much more slowly eventually reaching a value of 3.27 mpa. A ssume T final=19C. How many moles of air in the tank initially ?
If carbon dioxide gas is collected over water at 25 °C and 775 torr, what is the partial pressure of the CO2? The vapor pressure of water at 25 °C is 23.8 torr.
How many moles of luminol are present in 2.00 L of the diluted spray?
A concentrated sulfuric acid solution is 65.0% H2SO4 by mass and has a density of 1.55 g/mL at 20°C. What is the mass of 8.00 L of the concentrated sulfuric acid solution?
How many dimes do you need to buy as much candy as possible? How much should all these dimes weigh? How many pieces of candy could you buy? How much would this candy weigh? How many pieces of candy could you buy with twice as many dimes?
Ethylene glycol is used as automobile antifreeze. 6.38g og this compound contains 2.47g of carbon and 0.620g of hydrogen. The rest is oxygen. The molar mass is 62.0g/mole.
Write the overall equation for the reaction. B) Do you expect this reaction to go by an E1 or an E2 mechanism?
Ethanol, C2H5OH, is mixed with gasoline and sold as gasohol. Calculate the grams of ethanol needed to provide 388kJ of heat.
Lethality of Carbon Monoxide, Sulfur Dioxide and TNT, Air monitoring provides the following contaminant concentrations at the approximate center of a fire scene in which acres of automobile tires are burning
How many grams of ethylene glycol (automobile antifreeze, C2H6O2) dissolved in 3.55kg of water is needed to lower the freezing point
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