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leonid [27]
3 years ago
15

Rust forms when the iron is exposed to water and oxygen. True False

Chemistry
2 answers:
Montano1993 [528]3 years ago
8 0
True

explanation:

i looked it up
ANTONII [103]3 years ago
8 0

Answer: true

Explanation:

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A hot air balloon has an air vent that keeps the air pressure inside and outside the same. Allen observes that a hot air balloon
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B - The high temperature makes the gas molecules spread apart according to Charles's law because this law describes how a gas will behave at constant pressure.

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Charle's Law describes the relationship between temperature and volume, where increased temperature leads to increased volume. When volume is increased, that means the gas molecules are more spread apart and have more random motion. Therefore, the answer is B.

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Calculate the number-average molecular weight for a poly(vinyl chloride) for which the degree of polymerization is 21500.
bezimeni [28]

Answer:

The number-average molecular weight for a poly(vinyl chloride) is 1,343,750 g/mol.

Explanation:

Molecular weight of the poly(vinyl chloride),CH_2=CHCl =M=62.5 g/mol

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Degree of polymerization = n = 21500

\frac{M_a}{M}=n

M_a=n\times m=21500\times 62.5 g/mol=1,343,750 g/mol

The number-average molecular weight for a poly(vinyl chloride) is 1,343,750 g/mol.

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