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AysviL [449]
3 years ago
11

Students are copying their homework assignment from the whiteboard in their dimly lit classroom Some students are wearing eyegla

sses, some are not wearing anything over their eyes, and
one student is wearing dark sunglasses. Which material allows the least light to pass through it so that the smallest amount of light reaches the student's eyes?
Eyeglasses
Sunglasses
Air
Chemistry
1 answer:
Keith_Richards [23]3 years ago
3 0

Answer:

sunglasses

Explanation:

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D. Solids

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Is bioluminescence an endothermic process bioluminescence an endothermic process or exothermic process?\?
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4 years ago
Calculate the ph of a 0.10 m solution of hypochlorous acid, hocl. ka of hocl is 3.5×10−8 at 25 ∘c. express your answer numerical
Viktor [21]

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4.23.

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<em>∵ pH = - log[H⁺].</em>

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3 0
4 years ago
In the reaction 2Mg (s) + O2 (g) + 2H2O (l) → 2Mg2+ (aq) + 4OH– (aq), which substance is reduced?
Bogdan [553]

F. <em>None of the above </em>

<em>No O atoms are present</em> as reacting substances, only O_2 and H_2O molecules.

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We must use <em>oxidation numbers</em> to decide whether oxygen or water is the substance reduced.

The oxidation number of O changes from 0 in O_2 to -2 in OH^(-).

A decrease in oxidation number is <em>reduction</em>, so O_2 is the substance  reduced.

The oxidation number of O is -2 in both H_2O and OH^(-), so water is <em>neither oxidized nor reduced</em>.

6 0
4 years ago
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