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nataly862011 [7]
3 years ago
11

Which explanation of the solar system best fits the observations of the planets and how they orbit the sun?

Chemistry
1 answer:
Svetllana [295]3 years ago
6 0
<span>The sun and planets formed from a collapsing spinning cloud of gas and dust.</span>
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In the dilution process of a solution, the moles of ___________ does not change.
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How many grams of sodium are in .500 of a mole
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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.

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Learn more about combustion here-

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4 0
1 year ago
Help <br> whoever answers all gets marked brainliest
Lelechka [254]

#1

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#2

Yes here we can see the dots and crosses clearly.

  • Dot and crosses digram

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It's Methane or CH_4

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