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3 years ago

What species is reduced in the reaction below?

Chemistry

1 answer:

lesya692 [45]3 years ago

5 0

Answer: The correct option is D) $Ag^+$

Explanation:

The oxidation reaction is defined as the reaction in which a chemical species loses electrons in a chemical reaction. It occurs when oxidation number of a species increases.

A reduction reaction is defined as the reaction in which a chemical species gains electrons in a chemical reaction. It occurs when oxidation number of a species decreases.

For the given chemical reaction:

$Zn^0+2Ag^+\rightarrow Zn^{2+}+2Ag^0$

On the reactant side:

Oxidation number of Zn = 0

Oxidation number of Ag = +1

On the product side:

Oxidation number of Zn = +2

Oxidation number of Ag = 0

As the oxidation number of Ag is decreasing from +1 to 0. Thus, $Ag^+$ is getting reduced.

Hence, the correct option is D) $Ag^+$

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Which model demonstrates a correct pathway carbon takes in the carbon cycle?

weqwewe [10]

Answer:

C) atmosphere → plants → animals → soil

Explanation:

The third choice provides the correct path through which carbon is cycled in nature.

Carbon passes from the atmosphere to plants then to animals and finally to the soil.

Plants uses carbon dioxide from the atmosphere to manufacture their food.
The food is made up of giant carbon chains which also provides nourishment for animals.
When animals digest plant matter, they obtain energy for their process.
The waste is passed into the soil .

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3 years ago

Which two plates border the san andreas fault?

Zina [86]

Pacific plate and the North American plate

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3 years ago

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Using the thermodynamic information in the ALEKS Data tab, calculate the standard reaction entropy of the following chemical rea

Lapatulllka [165]

Answer:

-122 J/K

Explanation:

Let's consider the following balanced reaction.

N₂(g) + 2 O₂(g) ⇒ 2 NO₂(g)

We can calculate the standard reaction entropy (ΔS°) using the following expression.

ΔS° = Σ ηp × Sf°p - Σ ηr × Sf°r

where,

η: stoichiometric coefficients of products and reactants

Sf°r: entropies of formation of products and reactants

ΔS° = 2 mol × 240.06 J/K.mol - 1 mol × 191.61 J/K.mol - 2 mol × 205.14 J/K.mol

ΔS° = -121.77 J/K ≈ -122 J/K

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3 years ago

How many liters are in 4.5 moles of CO2 gas at STP? Pls help :)

slavikrds [6]

Answer:

Explanation:

NCO 2= 4,5

VCO2= 4,5* 22,4=100,8

5 0

2 years ago

Which sample of matter is a mixture (1) Br2(l) (2) K(s) (3) KBr(s) (4)KBr(aq)

SOVA2 [1]

Answer:

(4)KBr(aq)

Explanation:

A mixture is an impure substance made up of two or more substances that are joined together. Their composition is indefinite and not easily represented by a simple chemical formula.

KBr $_{aq}$ is a mixture because it made up of an aqueous solution of KBr. This suggests that the substance KBr is placed inside water.

Here, we have two states of matter which is the solid and the liquid coming together.

As with both mixtures, they can be separated by physical means, KBr aqueous solution can also be done this way.

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3 years ago