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Elena L [17]
3 years ago
7

A boundary between air masses that don't move possibly causing rain for several days.

Chemistry
1 answer:
Vanyuwa [196]3 years ago
4 0

Answer:

A Front

Explanation:

A Front is a boundary between two air masses of different density, moisture, or temperature

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What is the percent composition of carbon in heptane c7h16
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Answer: the percent composition of carbon in heptane is 83.9%

Explanation:

<u>1) Atomic masses of the atoms:</u>

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  • H: 1.008 g/mol

<u>2) Molar mass of heptane:</u>

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<u>3) Mass of carbon in one mole of heptane:</u>

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<u>3) Percent composition of carbon:</u>

  • % = (mass in grams of C) / (mass in grams of C₇H₁₆) × 100 =

           = (84.07 g/ 100.2 g) × 100 = 83.9% ← answer

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3 years ago
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