Answer:
Mg2 + O2 → 2MgO
Explanation:
Hope this helps!! I got it right.
<span>
Val-Ser-His is an example of
tripeptide (containing three amino acids). As we know proteins are bio-polymers made up of small repeating units called amino acids. Amino acids on condensation reaction produces polypeptides. These polypeptides can be hydrolyzed to its corresponding amino acids when reacted with water in the presence of acid. The tripeptide given in problem upon hydrolysis produces three amino acids i.e.
Valine,
Serine and
Histidine (Figure).</span>
<span>Among the given choices, the third option is the only one which illustrates single replacement.
(3)H2SO4 + Mg --> H2 + MgSO4
A single replacement is also termed as single-displacement reaction, a reaction by which an element in a compound, displaces another element.
It can be illustrated this way:
X + Y-Z → X-Z + Y</span>
Phenolphthalein indicator indicates the pH of the solution. This indicator is used when the solution is colorless. When added to a solution which is basic in nature, the solution changes color form colorless to pink.
Thus, the correct answer is that the given solution is basic in nature.
Answer:
The correct answer is because distilled water has a neutral pH=7.
Explanation:
Distilled water has a neutral pH of 7, which means that water is neither an acid nor a base. Vinegar is a dilute acid that can be further diluted with water, or it can be neutralized using a base. The term "pH" means "hydrogen potential", the more hydrogen-free ions in flotation in a solution, the more acidic it will be.
The pH of vinegar will always be kept at a lower than neutral number, no matter how diluted, because vinegar is an acid.
By adding distilled water (pH = 7) to the vinegar, it does not increase the amount of H+ in the solution, so it does not affect the pH of the vinegar.
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