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Nat2105 [25]
3 years ago
7

NEED HELP ASAP! What is the relationship between changes in air pressure and wind speeds?

Chemistry
1 answer:
saul85 [17]3 years ago
3 0

Answer:

I think its C

Explanation:

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Distillation is a _____________ separation technique.
Annette [7]

Answer:

physical

Explanation:

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3 years ago
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A compound is found to contain 11.21 % hydrogen and 88.79 % oxygen by mass. What is the empirical formula for this compound?
Artemon [7]

Answer:

H₂O

Explanation:

The empirical formular of the compound is obtained using the following steps;

Step 1: Divide the percentage composition by the atomic mass

Hydrogen = 11.21 / 1 = 11.21

Oxygen = 88.79  / 16 = 5.55

Step 2: Divide by the lowest number

Hydrogen  = 11.21 / 5.55 = 2.02 ≈ 2

Oxygen = 5.55 / 5.55 = 1

This means the ratio of the elements is 2 : 1

The empirical formular (simplest formular of a compound) of the compound is;

H₂O

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3 years ago
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The rate constant for a first-order reaction is 0.54 s-1. What is the half-life of this reaction if the initial concentration is
Diano4ka-milaya [45]

Answer:

The half life time of first order reaction is 1.3 sec

Explanation:

Given:

First order rate constant K = 0.54 M^{-1} s^{-1}

Initial concentration = 0.54 M

From the formula of first order half life time,

  K = \frac{0.693}{t_{\frac{1}{2} } }

So half life time is given by,

{t_{\frac{1}{y2} } } = \frac{0.693}{0.54}

{t_{\frac{1}{y2} } }  = 1.3 sec

Therefore, the half life time of first order reaction is 1.3 sec.

4 0
3 years ago
Forensic toxicology involves not only the area of toxicology, but also the use of areas such as analytic chemistry and pharmacol
grandymaker [24]

Answer:

The answer is True

Explanation:

Forensic toxicology involves or  employs or uses disciplines such as analytical chemistry, pharmacology and clinical chemistry to aid medical or legal investigation.

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4 years ago
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How was president Andrew Jackson wrong for closing the bank
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Jackson, the epitome of the frontiersman, resented the bank's lack of funding for expansion into the unsettled Western territories. Jackson also objected to the bank's unusual political and economic power and to the lack of congressional oversight over its business dealings.
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