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Assume that you have a small amount (< 3mg) of crystals that formed from a recrystallation with 1 mL of solvent. To isolate the crystals, the best technique would be to:
a) gravity filtration using a funnelb) using a pipette with the cotton in the tipc) using a pipette with cotton at the neckd) evaporating the solvent
A mixture of CO2 and Kr weighs 35.0g and exerts a pressure of 0.708 atm in its container. Since Kr is expensive, you wish to recover it from the mixture. After the CO2 is completely removed by absorption with NaOH(s), the pressure in the container..
If the sun is a distance of 1.5 x 10^8 km from earth, how many minutes does it take sunlight to reach earth if light travels at 186,000 miles each second
How many milliliters of 0.483 M HBr solution can be made from 38.0 mL of 8.00 M HBr solution?
A student performs an extraction using water and methylene chloride. Which is the top layer and which is
if you know the amounts of acid and base components in the buffer you can use the equation to find the ph. find the ka
what simple test would you use to identify the possible presence of HCl (aq)? what result do you expect if the solution is HCl (aq)?
Draw the Lewis dot structure of CNNO2 along with all possible resonance structures, labeling formal charges.
What is the order of increasing polarity of the compounds: benzophenone, trans-stilbene, 2-naphthol, benzoic acid
what is the volume of 1 mole of Helium gas when the pressure is 1.47 atm and the temperature is 287 K.
how many cans of Mountain Lightning would an individual have to drink to die from a tartrazine overdose If the LD50 of tartrazine in humans is supposed to be 12,750 mg/kg (as it is for mice) and the average human weighs 70 kilograms,?
A sample of gas has a mass of 38.7mg . Its volume is 224mL at a temperature of 57 degrees Celsius and a pressure of 868torr . Find the molar mass of the gas.
If you used 0.165 mL of acetic anhydride, and 0.167 g of p-aminophenol. How many moles of the non-limiting reageant remained after the reaction was complete?
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