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irinina [24]
4 years ago
9

Explain how you think we can determine if a substance is a pure substance or a mixture.

Chemistry
1 answer:
gayaneshka [121]4 years ago
6 0

Answer:

Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components.

Explanation:

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A sample of c3h8 has 4.56 Ã 1024 h atoms. how many carbon atoms does the sample contain?
m_a_m_a [10]
Answer is: there is 1,368·10²⁵ atoms of carbon.
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From molecular formula: in one molecule of propane there is three atoms of carbon:
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N(C) = 1,368·10²⁵.

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4 years ago
How much heat does it take to raise 100g of aluminum (c= .9 J/gC) from 12.5C to 31C?
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When two substances having different temperatures are introduced or kept together, heat energy, Q, flows from a substance at higher temperature to a substance at lower temperature. Also, heat continues to be transferred until their temperatures are equalized, at which point the substances are in thermal equilibrium. In a closed system, the amount of energy lost is equal to but opposite the amount of energy gained.

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3 years ago
(As) in noble-has notion
vaieri [72.5K]

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