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Molodets [167]
3 years ago
10

Which action is the best example of a direct observation

Chemistry
2 answers:
kiruha [24]3 years ago
5 0

The answer is D Determining the seal population of an island by counting seals in 10 square meters of the island on e2020

luda_lava [24]3 years ago
3 0

Since you didn't have any extra information about the question I'll be presenting an example from my own textbooks that I've used.

An example of a direct observation is listening to a cricket chirp at night, and counting the number of chirps per minute.

Direct Observation is where the evaulator watches the subject in their usual habitat without disrupting or altering it.

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Answer:

1.2x10⁻⁵M = Concentration of the product released

Explanation:

Lambert-Beer's law states the absorbance of a solution is directly proportional to its concentration. The equation is:

A = E*b*C

<em>Where A is the absotbance of the solution: 0.216</em>

<em>E is the extinction coefficient = 18000M⁻¹cm⁻¹</em>

<em>b is patelength = 1cm</em>

<em>C is concentration of the solution</em>

<em />

Replacing:

0.216 = 18000M⁻¹cm⁻¹*1cm*C

<h3>1.2x10⁻⁵M = Concentration of the product released</h3>
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Answer:

An amide may be produced by reacting an acid chloride with ammonia.

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C sounds correct........
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You are working in a lab when radiation alarms go off. You are only wearing a lab coat. Preliminary reports show that the radiat
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The lab coat is not thick enough to protect you from ionizing radiation.

<h3>What is radiation?</h3>

Radiation is a form of energy that we can not see with our optical eyes. We know that radiation could have a damaging effect on the body. The sort of radiation that could have a damaging effect on the body is what we call ionizing radiation.

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