Pre-Lab Study Questions 1. What property of oil makes it float on water? 2. Why

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Pre-Lab Study Questions 1. What property of oil makes it float on water? 2. Why would heating the gas in an air balloon make the balloon rise? 3. What is the difference between density and specific gavity? 4. How does a graph help us interpret scientific data? A. Density of a Solld (Use the "density of a solld demonstration" to collect data.) A.1 Mass of the solid A 2 Volume of the solid by displacement Initial w ater level (mL) Final water level with solid (mL) Volume of solid (mL) A 3 Calculating the density of the solid Show calculations Questions and Problems (Show complete setup) Q.1 An object made of aluminum has a mass of 8.37 g. When it was placed in a graduated cylinder containing 20.0 mL of water, the water level rose to 23.1 ml. Calculate the density and specific gravity of the object B. Density of a Liquid (Use the "Sugar-Water Experiment" to collect data) B.1 Volume of Liquid Type of liquid sugar water B.2 Mass of Liquid Mass of beaker Mass of beaker + liquid Mass of liquid B.3 Density of a Liquid Density Calculations for density) C. Specific Gravity C.l Specific gravity (Show calculations, calculated from B.3) Questions and Problems (Show complete setups) 02 What is the mass of a solution that has a density of 0.,775 g/mL and a volume of 50.0 ml? 03 What is the volume of a solution that has a specifie gravity of 1.2 and a mas of 185

Explanation / Answer

a)The property of oil that allows it to float in water is it's DENSITY. Oil is less dense than water and dose not mix with water, allowing the oil to float on water.

b)As air is heated it expands and will become less dense than the cool surounding air that is more dense allowing the hot air to rise

c)The difference between density and specific gravity is that one is a ratio of the other, density is the measure of the amount of mass per volume.

Specific gravity is a comparison of the density of an object with the density of water (1.00 g/mL at 4 degrees celsius)

*** Specific gravity is a number with no units, the units of density canceled each other out.

density = mass of sub / volume of sub

Specific gravity = denisity of a sub(g/mL) / desnisy of water (1.00g/mL)

d)  It allows you to see a change in the data which you can use to predict a trend or track other noteworthy details.

Graphs turn raw data into easy to understand pictures for quick examination

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