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Question 4
An empty container weighs 34.50 g. When filled with water at 25°C, it weighs 37.21 g including the weight of
the container. When the same container is filled with an unknown liquid at 25°C, it weighs 38.95 g including
the weight of the container. Determine the density of the unknown liquid at 25°C.
Additional info
Density of water is 0.997048 g/mL at 25°C.
1.32 g/mL
1.05 g/mL
0/4 pts
0.611 g/mL

Respuesta :

Eduard22sly

The density of the unknown liquid is 1.64 mL

What is density?

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

How to determine the volume of the container

We can obtain the volume of the container by calculating the volume of the water. This is illustrated below:

  • Mass of empty container = 34.5 g
  • Mass of container + water = 37.21 g
  • Mass of water = 37.21 - 34.5 = 2.71 g
  • Density of water = 0.997048 g/mL
  • Volume of water = ?

Density = mass / volume

Thus,

Volume = mass / density

Volume of water = 2.71 / 0.997048

Volume of water = 2.718 mL

How to determine the density of the unknown liquid

  • Mass of empty container = 34.5 g
  • Mass of container + unknown liquid = 38.95 g
  • Mass of unknown liquid = 38.95 - 34.5 = 4.45 g
  • Volume = 2.718 mL
  • Density of unknown liquid =?

Density = mass / volume

Density of unknown liquid = 4.45 / 2.718

Density of unknown liquid = 1.64 mL

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