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Tju [1.3M]
3 years ago
7

Please please help me please please help please please help me please please help please please

Chemistry
1 answer:
Tatiana [17]3 years ago
6 0

Answer:

AU9NJ-BLVHV-TCLJS-54YTB

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When circumstances are right, most materials undergo a process called thermal expansion. Which statement best describes the caus
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Answer: Matter is heated, and its particles spread out more

Explanation:

Thermal expansion occurs when there's an expansion of an object or material or when an object becomes bigger because of a rise in its temperature. This brings about the faster movement of the heated molecules and the atoms spreading out.

Therefore, the cause and effect of thermal expansion will be that when matter is heated, and its particles spread out more.

6 0
3 years ago
using the following thermochemical equation, determine the amount of heat produced from the combustion of 24.3 g benzene (c6h6).
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the amount of heat produced from the combustion of 24.3 g benzene (c6h6) is ΔH = -976.5 kJ

There are two moles of benzene involved in the process (C6H6). Since the heat of this reaction is -6278 kJ, the burning of 2 moles of benzene will result in a heat loss of 6278 kJ. This reaction is exothermic.

Enthalpy, or the value of H, is a unit of measurement for heat that relies on the amount of matter present (number of moles).

Thus, 24.3 g of benzene contains:

n = mass/molar mass, where n = 24.3/78.11, and n = 0.311 moles.

2 moles = 6278 kJ

0.311 moles =x

By the straightforward direct three rule:

2x = -1953.08 x = -976.5 kJ

Learn more about combustion here-

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4 0
1 year ago
Suppose that a substance in a beaker is heated over a burner in a science lab. Which observation would most likely indicate that
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Answer:

D

Explanation:

the production of an odor would indicate that the heat ignited a chemical reaction

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I believe the correct answer from the choices listed above is option D. Catalysts lower the activation energy of a chemical reaction. It <span>is a substance which speeds up a reaction, but is chemically unchanged at the end of the reaction. It provides another pathway for the reaction to occur.</span>
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<em><u />the correct option is <u>c ) 10,000...</u>
an acid which is more acidic than 6 pH will be of pH 5 acid because if one acid is stronger than the other acid than its magnitude of strength is 1000... it is constant always...</em>
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3 years ago
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