- 1). Place the graduated cylinder on the scale and measure its mass in kilograms. As an example use a mass of 2 kilograms for the cylinder.
- 2). Pour the ammonia solution into the graduated cylinder and measure the combined mass of the cylinder and the solution in kilograms. This may lead to a combined mass of 2.5 kilograms.
- 3). Subtract the mass of the graduated cylinder from the combined mass to obtain the mass of the ammonia solution. This results in 2.5 kilograms minus 2 kilograms yielding a ammonia solution mass of 0.5 kilograms.
- 4). Note the number of liters at the top of the ammonia solution marked on the side of the graduated cylinder to get the volume in liters. For example, say you have 1.3 liters of ammonia solution.
- 5). Convert the volume to cubic meters by dividing 1000, since 1000 liters make up a single cubic meter. Now you have a volume in cubic meters of 1.3 divided by 1000 or 0.0013 cubic meters.
- 6). Divide the mass by the volume to arrive at the density in kilograms per cubic meter. Completing the example you have 0.5 kilograms divided by 0.0013 cubic meters which equals a density of 385 kilograms per cubic meter.
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