Density and properties of matterIB MYP Chemistry: Flashcards
What these 12 flashcards ask
- What is the formula for density?
- What are two units for density?
- How do you convert g/cm³ to kg/m³?
- How do you find the volume of a regular solid like a cuboid?
- How do you find the volume of an irregular solid?
- How do you find the mass of a liquid?
- What is standard form?
- How many cm³ are in 1 m³?
- Name three physical properties.
- Name two chemical properties.
- Is density a physical or chemical property?
- Does the density of a pure metal change if you cut the sample in half?
Exam questions on Density and properties of matter
- A jeweller in Jaipur wants to check whether a small shiny bar is pure gold or a cheaper metal that looks similar. The bar is a cuboid measuring 2.0 cm by 1.5 cm by 2.5 cm. She finds its mass is 96.5 g.Pure gold has a density of 19.3 g/cm³. Decide whether the bar is pure gold and justify your answer.2 marks
- A student in São Paulo wants to find the density of an irregular piece of rock. She finds that the rock has a mass of 84 g. She half-fills a measuring cylinder with water and reads 50 cm³. She lowers the rock into the water on a thread and the water level rises to 82 cm³.Calculate the density of the rock in g/cm³. Give your answer to 2 significant figures.2 marks
- A student in Cape Town wants to find out how adding salt changes the density of water. She dissolves different masses of salt in 100 cm³ of water to make four solutions, all at the same temperature. For each solution she measures 50 cm³ in a measuring cylinder and finds the mass of the 50 cm³ sample using a balance.Identify the independent variable, the dependent variable and one control variable.3 marks
Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).