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sveta [45]
3 years ago
10

Which is not a characteristic of a compound? Different samples have different properties Can be represented by a chemical formul

a. Has different properties from its compound elements or a pure substance made of two or more elements
Physics
1 answer:
Helga [31]3 years ago
8 0

Out of all given choices, “Different samples have different properties” is not a characteristic of a compound

Answer: Option A

<u>Explanation: </u>

A substance which comprises of more than one element chemically linked together at a fixed weight ratio usually referred as compound. The relationship arises due to the result of the chemical reactions between the components of the elements.

The property of the compound vary from the property of its elements to which it gets formed. For example: Water (H_{2} O) is a combination of two elements, hydrogen and oxygen, chemically bonded in a constant 1: 8 weight ratio .

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anygoal [31]

Answer:

a) \Delta s=443037.9747\ J.K^{-1}

b) \Delta s=31868131.8681\ J.K^{-1}

Explanation:

a)

Given:

amount of heat transfer occurred,dQ=3.5\times 10^6\ J

initial temperature of car, T_i=36.5+273=309.5\ K

final temperature of car, T_f=44.4+273=317.4\ K

We know that the change in entropy is given by:

\Delta s=\frac{dQ}{T_f-T_i}

\Delta s=\frac{3.5\times 10^6}{(44.4-36.5)} (heat is transferred into the system of car)

\Delta s=443037.9747\ J.K^{-1}

b)

amount of heat transfer form the system of house, dQ=5.8\times 10^8\ J

initial temperature of house, T_i=23.5+273=296.5\ K

final temperature of house, T_f=5.3+273=278.3\ K

\Delta s=\frac{dQ}{T_f-T_i}

\Delta s=\frac{5.8\times 10^8}{278.3-296.5}

\Delta s=31868131.8681\ J.K^{-1}

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dmitriy555 [2]

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<u>Explanation:</u>

Given:

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20 = \frac{f}{340 m/s} \\\\f = 20 X 340 s^-^1\\\\f = 6800 Hz

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