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2 years ago

Which metal can be used as a sacrificial electrode to prevent the rusting of an iron pipe? auau cucu mnmn agag

1 answer:

3 0

Mn metal can be used as a sacrificial electrode to prevent the rusting of an iron pipe. So, the correct option is (c) Mn.

Commonly, sacrificial electrodes are employed to stop another metal from corroding or oxidising. A metal that is more reactive than the metal being shielded must serve as the sacrificial electrode. Magnesium, aluminium, and zinc are the three metals most frequently used in sacrificial anodes.

Manganese-Magnesium (Mn-Mg) electrode is more suited for on-shore pipelines where the electrolyte (soil or water) resistivity is higher since it has the highest negative electropotential of the three. In order to replenish any electrons that could have been lost during the oxidation of the shielded metal, the highly active metal offers its electrons.

Therefore, Mn metal can be used as a sacrificial electrode to prevent the rusting of an iron pipe. So, the correct option is (c) Mn.

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Hat is the molar mass of a substance?

Morgarella [4.7K]

The molar mass is what would you find on the periodic table and it is used in the mole conversions within chemistry. So the answer would have to be A: the mass in grams of one mole of a substance.

7 0

4 years ago

If 65.39 g of zinc are mixed with some unknown mass of hydrochloride acid, 136.29 g of zncl2 are formed along with 2.00 g of hyd

zepelin [54]

How much hydrogen chloride acid was used?

72.916 g of hydrochloric acid was used.

Given:

Mass of Zn = 65.39 g

Mass of $ZnCl_{2}$ =136.29 g

Mass of $H_{2}$ = 2 g

Equation:

The chemical equation for the reaction of zinc with hydrochloric acid:

Zn + 2HCl → Zn $Cl_{2}$ + $H_{2}$

Hydrogen gas is created when zinc combines with hydrochloric acid, which causes the process to bubble ferociously. Another sign that a chemical reaction is taking place is the generation of a gas.

Calculation:

A number of equivalents equate:

Number of equivalents = $\frac{given mass}{Molecular Mass}$ x 1000 x equivalent factor

$\frac{x}{36.458}$ x 1000 x 1 = $\frac{136.29}{136.286}$ x 1000 x 2

$x$ = 36.458 x 2

$x$ = 72.916

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4 0

2 years ago

Ca(OH)2(aq)+HNO3(aq)→H2O(l)+Ca(NO3)2(aq)

shtirl [24]

what are we doing in that question

Explanation:

I dunno know

6 0

3 years ago

Pls help me!!!!!!!!!!!!!! I will give brainliest first answer i have 20 more minutes left of this quiz so pretty pls will you he

PSYCHO15rus [73]

Answer:

32 ppm

Explanation:

371-339=32 ppm

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3 years ago

Read 2 more answers

How is the structure of the atom arranged?

In-s [12.5K]

Answer:

An atom is a complex arrangement of negatively charged electrons arranged in defined shells about a positively charged nucleus. This nucleus contains most of the atom's mass and is composed of protons and neutrons (except for common hydrogen which has only one proton).

Explanation:

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3 years ago