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fiasKO [112]
3 years ago
15

A chemistry student needs of glycerol for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student di

scovers that the density of glycerol is . Calculate the mass of glycerol the student should weigh out.
Chemistry
1 answer:
Pachacha [2.7K]3 years ago
3 0

Answer:

The mass of glycerol that the student should weigh out depends on the volume that is needed. For example, the density of glycerol is 1.26 g/mL. Then, if 500 mL of glycerol is needed, 630 g should be weighed.

Explanation:

Density is the amount of mass per unit of volume. Density relates how many grams 1 milliliter of a substance weighs. Thus, if the density of glycerol is 1.26 g/mL means that 1.26 grams of glycerol occupy 1 mL of volume, or, in other words, 1 mL of glycerol weighs 1.26 grams.

Therefore, if 500 mL of glycerol is required to use for an experiment, 630 grams need to be weighed:

1 mL glycerol________ 1.26 g

500 mL glycerol______ x= 500mL * 1.26 g / 1 mL = 630 g

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The above reaction follows zero order kinetics. The rate law equation for zero order follows:

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where,

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Putting values in above equation, we get:

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