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3 years ago

)Assertion: Corrosion is a beneficial process for metals. Reason : Galvanising and electroplating of metals prevent corrosion.

1 answer:

7 0

The assertion is definitely wrong. Corrosion actually means decomposing or rusting of metals. So, corrosion is a harmful process for metals. But, your reason is correct. Galvanising, which means deposition of a layer of zinc on iron to prevent from rusting, is a very beneficial process to prevent metals from corrosion. In some cases, electroplating also helps to prevent from corrosion.

Hope it helps
Please mark my answer as BRAINLIEST

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What are the reactants and products of cellular respiration and photosynthesis?

Svetlanka [38]

Cellular Respiration and photosynthesis require a source to create energy.

For Cellular Respiration, the reactants are nutrients (oxygen being the most common). This is then converted into energy stored in ATP.

Now there are many forms of Cellular Respiration, but to keep it vague, the reactants would be sugars, amino acids, and fatty acids and oxygen. These are broken down into similar but much more simple molecules the body can use for energy.

In the case of Photosynthesis, the reactant would be the sun's energy and carbon dioxide. This is then converted into energy for the plant as well as producing oxygen

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3 years ago

Diffusion ________.

Scilla [17]

Answer:

a. occurs when particles spread from areas where they are less concentrated to areas where they are more concentrated

Explanation:

Diffusion is the net migration of particles such as molecules

ions, or atom from a region where it is highly concentrated to a lower concentration region. Diffusion is initiated by a concentration gradient. An instance is the existence of a concentration of particles of perfume at one end of a room which eventually spreads across the room.

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3 years ago

Which statements about the structure of the periodic table are true?

yuradex [85]

The correct statements about the structure of periodic table are:

1. The inner transition elements are placed at the bottom of the periodic table for easy viewing.

2. The distribution of electrons in energy levels is responsible for the shape of the periodic table.

Periodic table has more groups than periods.

And it has more metals than non metals.

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4 years ago

How many equivalent resonance structures can be drawn for the molecule of SO3 without having to violate the octet rule on the su

bearhunter [10]

Answer:

Explanation:

Resonance is a valence bond concept put forward by Linus Pauling to explain the fact that the observed properties of a molecule may be as a result of the fact that its actual structure lie somewhere between a given number of structural extremes called canonical structures or resonance structures.

There are three resonance structures for SO3 that obey the octet rule. All the S-O bonds in SO3 are equivalent in these resonance structures.

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3 years ago

is a polyprotic acid. Write balanced chemical equations for the sequence of reactions that carbonic acid can undergo when it's d

Burka [1]

Answer:

H₂CO₃ H₂O ⇄ HCO₃⁻ + H₃O⁺ Ka1

HCO₃⁻ + H₂O ⇄ CO₃⁻² + H₃O⁺ Ka2

CO₃⁻² + H₂O ⇄ HCO₃⁻ + OH⁻ Kb1

HCO₃⁻ + H₂O ⇄ H₂CO₃ + OH⁻ Kb2

Explanation:

Formula for carbonic acid is: H₂CO₃

It is a dyprotic acid, because it can release two protons. We can also mention that is a weak one. The equilibrums are:

H₂CO₃ H₂O ⇄ HCO₃⁻ + H₃O⁺ Ka1

HCO₃⁻ + H₂O ⇄ CO₃⁻² + H₃O⁺ Ka2

When the conjugate strong bases, carbonate and bicarbonate take a proton from water, the reactions are:

CO₃⁻² + H₂O ⇄ HCO₃⁻ + OH⁻ Kb1

HCO₃⁻ + H₂O ⇄ H₂CO₃ + OH⁻ Kb2

Notice, that bicarbonate anion can release or take a proton to/from water. This is called amphoteric,

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3 years ago