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Sveta_85 [38]
2 years ago
13

Mucin, a component of saliva, functions to __________.

Chemistry
1 answer:
Mariulka [41]2 years ago
4 0
A critical function of mucin in saliva is to protect the mouth from drying out. Mucin also lubricates the tissues and teeth in the mouth and protects them against pathogens and toxins
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PLEASE HELP IMMEDIATE WORTH 10 POINTS
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Explanation:

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3 years ago
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1. Energy changes occur as *
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Given the reaction for the nickel-cadmium battery: 2NiOOH + Cd +2H2O -&gt; 2Ni(OH)2 + Cd(OH)2 What species is oxidized during th
jok3333 [9.3K]

Answer:

Cd is oxidized during the discharge of the battery

Explanation:

Based on the reaction:

2 NiOOH + Cd + 2H₂O → 2Ni(OH)₂ + Cd(OH)₂

And knowing Oxygen and hydrogen never change its charge, we must to find oxidation state of Ni and Cd before and after the reaction:

<em>Ni:</em>

In NiOOH: 2 O = -2*2 = -4 + 1H = +1, = -4 + 1 = -3. And as the molecule is neutral, Ni is 3+

In Ni(OH)₂: OH = -1. As there are 2 OH = -2. That means Ni is +2

The Ni is gaining one electron, that means is been reduced

<em>Cd:</em>

Cd before reaction is as pure solid with oxidation state = 0

Cd after the reaction is as Cd(OH)₂: 2 OH = -2. That means Cd is +2

The Cd is loosing 2 electrons, that means is the species that is oxidized.

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Therefore as you may notice, hydrogen in modern periodic tables are put in the center of the periodic table on the top.
6 0
2 years ago
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