A student measured 2957 microliters (muL) of an unknown liquid with an Eppendorf

Question

A student measured 2957 microliters (muL) of an unknown liquid with an Eppendorf pipette and found its mass to be 3.065 grams (g). Calculate the density with units of g/mL. Report answer to 4 sig figs. A student synthesized methyl 3-nitrobenzoate by nitration. After isolating the product by vacuum filtration, the student washed the crystals with a small amount of ethanol. Why? redissolve the product for IR remove water from the crystals stop the reaction from continuing purify the product by recrystallization

Explanation / Answer

42. Volume of liquid = 2957 microlitres

= 2957X10-3 mL

= 2.957 mL

Mass of liquid = 3.065 g

Density = mass/volume

D = 3.065/2.957

= 1.0365 g/mL

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