Learn the toughest concepts covered in your Analytical Chemistry class with step-by-step video tutorials and practice problems.

Tools of the Trade

**Buoyancy** represents the upward force an object either by a liquid or air.

1

Buoyancy in Air

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In order to determine the *true mass* of an object you utilize the **buoyancy equation**:

2

Buoyancy in Air

3m

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3

Buoyancy in Fluid

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4

Buoyancy in Fluid

4m

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5

Buoyancy Calculations

3m

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6

Problem

An empty container weighing 73.190 g is filled with an unknown liquid and the combined mass is recorded as 87.308 g. The container was then emptied and filled with water and recorded a new mass of 88.442 g at a temperature of 19 ^{o}C. (d = 1.0027 g/mL). Calculate the density of the unknown liquid.

A

0.92861 g/mL

B

0.92565 g/mL

C

0.92815 g/mL

D

0.93000 g/mL

7

Buoyancy Calculations 2

4m

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8

Buoyancy Calculations 2

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9

Problem

An object weighs 36 g in air and has a volume of 8.0 cm** ^{3}**. What will be its apparent weight when immersed in water?

A

26 g

B

28 g

C

27 g

D

29 g