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4 years ago

Which statement is true: Mg -> Mg2+ + 2e-

Chemistry

1 answer:

Damm [24]4 years ago

3 0

Answer:

(2) Mg²⁺ loses 2 electrons.

Explanation:

Let's consider the following half-reaction.

Mg ⇒ Mg²⁺ + 2 e⁻

Magnesium is a metal that loses 2 electrons to fulfill the octet rule. When magnesium loses electrons, the oxidation number increases from 0 to +2. This kind of half-reaction is known as oxidation, and has to be accompanied by a reduction of another species.

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How does the state of atoms in a neon light change when light is emitted?

Blababa [14]

The state of atoms in a neon light when light is emitted is loss of energy.

5 0

3 years ago

Read 2 more answers

Water (2150 gg ) is heated until it just begins to boil. If the water absorbs 5.91×105 JJ of heat in the process, what was the i

Serjik [45]

Answer:

Initial temperature of water was 34,3°C

Explanation:

The heat absorbed in the process (Q) can be written as:

Q = mcΔT

Where the heat is 5,91x10⁵J, m is mass of water (2150g), c is specific heat of water (4,184J/g°C). And ΔT is change in temperature (100°C - x). Replacing:

5,91x10⁵J = 2150g×4,184J/g°C×(100°C - x)

5,91x10⁵J = 899560J - 8995,6J/°Cx

-3,0856x10⁵J = - 8995,6J/°Cx

34,3°C = x

Thus, <em>initial temperature of water was 34,3°C</em>

I hope it helps!

3 0

3 years ago

Chemistry neutralization

sukhopar [10]

Answer:

In chemistry, neutralization or neutralisation is a chemical reaction in which acid and a base react quantitatively with each other. In a reaction in water, neutralization results in there being no excess of hydrogen or hydroxide ions present in the solution.

Explanation:

5 0

3 years ago

Why do different elements have different colored flames when they are heated?

Mademuasel [1]

It depends on their energy levels.

5 0

3 years ago

A 1.00 liter solution contains 0.37 M nitrous acid and 0.48 M potassium nitrite. If 0.120 moles of calcium hydroxide are added t

rosijanka [135]

Answer:

A. The number of moles of HNO2 will remain the same. True

B. The number of moles of NO2- will remain the same. False

C. The equilibrium concentration of H3O will remain the same. False

D. The pH will decrease. False

E. The ratio of [HNO2] / [NO2-] will remain the same. True

Explanation:

The mixture of nitrous acid and potassium nitrite is a buffer solution. Hence the properties outlined above. Buffer solutions are designed to militate against changes in acidity or alkalinity. This explains why the above statements were categorized as true or false accordingly.

3 0

3 years ago