# Density of materials

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The density of a material is defined by the equation: density = mass / volume, Ο = m / V, where density, Ο, in kilograms per metre cubed, kg/mΒ³ mass, m, in kilograms, kg, volume, V, in metres cubed, mΒ³.

There 3 main states of matter: solids (defined shape, regularly arranged particles, high density), liquids (can change shape, particles can move, lower density), gases (can change shape, randomly distributed particles, low density).

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Why does oil adapt to the shape of of surroundings, while a piece of metal does not?

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Explain, why mixing ethanol and water will result in a mixture, while putting a block of copper near a block of aluminium will have no effect?

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Draw a diagram to represent molecules of a gas that has 2 species of molecules.

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Draw a diagram to represent molecules of a solid that has 2 types of particles.

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Draw a diagram to represent molecules of a liquid that has 2 types of molecules.

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Calculate the volume of a room if air in it has a mass of 89.425 kg and the average density of air in that room is 1.225 kg/mΒ³.

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A metal cylinder (3,750 kg/mΒ³) has a mass of 6,000 kg. Find the volume of it.

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What is a volume of 1.5 kg of mineral water (density is 1.052 g/cmΒ³)? Give your answer in cmΒ³, correct to units.

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90% of a swimming pool was filled with 320,000 kg water that had density of 1,002 kg/mΒ³. What is the full volume of the swimming pool? Round your answer to the nearest mΒ³.

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90 % of a swimming pool was filled with water that had density of 988 kg/mΒ³. If the full volume of the swimming pool is 526 mΒ³, what is the mass of water in it? Round your answer to the nearest unit.

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A car was refilled with 56 kg of fuel that has 780 kg/mΒ³ density. Calculate the volume of this fuel to the nearest L.

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A container is filled with a fertiliser that has an average density of 780 kg/mΒ³. What is the maximum mass of a container with the fertiliser, if it has a volume of 550 mΒ³ and according to regulations only 80 % of it can be filled? The mass of the actual metal container can be neglected.

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Oliver has built a snowman that has a volume of 230 L. What is the mass of the snowman if compressed snow has a density of 0.700 g/cmΒ³?

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2.05 L of olive oil have a mass of 1923 g. Find the density of this olive oil in g/cmΒ³. Give your answer correct to the nearest 0.01 g/cmΒ³.

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A cube with sides of 50 cm was cut from a specific wood and it had a mass of 53.2 kg. What is the density of this wood? Give your answer correct to kg/mΒ³.

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A block of 2 mΒ³ aluminium was weighted and the mass of it was found to be 5400 kg. What is the density of aluminium?

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Olive oil has a density of 0.85 g/cmΒ³. What is the mass of 1 L bottle of olive oil in kg? Give your answer correct to two decimal places.

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If sand has a density of 2,325 kg/mΒ³, what would be the mass of 2.3 mΒ³ sandbox? Give your answer correct to kg.

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If sea water has a density of 1,034 kg/mΒ³, what would be the mass of 0.59 mΒ³ aquarium? Give your answer correct to kg.

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