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3 years ago

Identify whether the atom or ion in each equation shows oxidation or reduction

Chemistry

1 answer:

marissa [1.9K]3 years ago

6 0

Oxidation means that atom or ion loses electrons.
Reduction means that atom or ion takes electrons.

Cu²⁺ +2e⁻ ---> Cu⁰ , We can see that ion Cu²⁺ takes electrons, so this is reduction.
Fe⁰ ------> Fe⁺³ + 3e⁻, We can see that atom Fe lost electrons, so this is oxidation.

Reduction:
A., C., E.
Oxidation:
B., D.

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2 years ago

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vovikov84 [41]

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3 years ago

Which of the following statements concerning double covalent bonds is correct?

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3 years ago

Neutral atoms contain equal numbers of A protons and electrons. B protons and neutrons. C electrons and neutrons. D protons, ele

Verdich [7]

Answer:

For 1: The correct answer is Option A.

For 2: The correct answer is Option B.

For 3: The correct answer is Option C.

Explanation:

For 1:

Atomic number is defined as the number of electrons or number of protons that are present in a neutral atom. It is represented as Z.

Z = Atomic number = Number of electrons = Number of protons

Mass number is defined as the sum of number of protons and number of neutrons present in an atom. It is represented as A.

A = Mass number = Number of protons + Number of neutrons

Hence, the correct answer is Option A.

For 2:

The isotopic representation of an atom is: $_Z^A\textrm{X}$

where,

Z = Atomic number of the atom

A = Mass number of the atom

X = Symbol of the atom

We are given:

An isotopic representation of beryllium atom: $_4^9\textrm{Be}$

Thus, the number '4' represents the atomic number of beryllium, number '9' represents the mass number of beryllium atom.

Hence, the correct answer is Option B.

For 3:

In CO compound:

Mass of oxygen = 16 g

Mass of carbon = 12 g

In $CO_2$ compound:

Mass of oxygen = 32 g

Mass of carbon = 12 g

Thus, the ratio of mass of oxygen in $CO_2$ and CO is:

$CO_2:CO=32:16=2:1$

Hence, the correct answer is Option C.

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3 years ago

Currents at the surface of the ocean are

lakkis [162]

Answer:

D. The mixing of warm and cold water

Explanation:

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