A student working 3.0m away from you in a chemistry lab performs an experiment which creates a bad odor. It takes a while for the smell to get to you (air currents negligible). You are able to move 2.0m further away from the source but the smell catches up with you in another 60 seconds. What is the diffusion coefficient in the air for the molecules you smell?

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Q: conductivity

A:

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A: THE DIAGRAM FORMULATED WILL BE LIKE THIS:-

Q: Find the missing Properties in the following table for water: T [C] V[m³/kg] 300 1 2 3 4 P[kPa] 1600…

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Q: 7) Why is the heat capacity of a diatomic gas different than a monatomic gas at room temperature ?

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Q: * The NAAQS for fine particles (PM25, annual average) is 12 µg/m?. Every time you breathe, you take…

A: Given data Air contain 12 μg/m3 of fine particles Every breath takes in 1 litre = 10-3 m3 of air

Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.