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Y_Kistochka [10]
4 years ago
10

Write or show a complete formation of the following ionic compounds a)sodium oxide (Na2O)​

Chemistry
1 answer:
OLga [1]4 years ago
3 0

Answer:

Na + O2 -> Na2O

Explanation:

sodium has one atom, oxygen has two atoms and so they exchange atoms hence Sodium obtaining two atoms at the end of the formation

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Calculate the molar concentration of OH ions in a 0.066 M solution of ethylamine (C2H5NH2: Kb= 6.4 x 10-)
wel

Answer:

6.5x10⁻³M = [OH⁻]

Explanation:

The Kb of a Weak base as ethylamine is expressed as follows:

Kb = [OH⁻] [C₂H₅NH₃⁺] / [C₂H₅NH₂]

As the equilibrium of ethylenamine is:

C₂H₅NH₂(aq) + H₂O(l) ⇄ C₂H₅NH₃⁺(aq) + OH(aq)

The concentration of C₂H₅NH₃⁺(aq) + OH(aq) is the same because both ions comes from the same equilibrium. Thus, we can write:

Kb = [OH⁻] [C₂H₅NH₃⁺] / [C₂H₅NH₂]

6.4x10⁻⁴ = [X] [X] / [C₂H₅NH₂]

Also, we can assume the concentration of ethylamine doesn't decrease. Replacing:

6.4x10⁻⁴ = [X] [X] / [0.066M]

4.224x10⁻⁵ = X²

6.5x10⁻³M = X

<h3>6.5x10⁻³M = [OH⁻]</h3>
7 0
3 years ago
A dangerous condition in a nuclear reactor when fuel rods melt is called
Gnesinka [82]

Answer:

A dangerous condition in a nuclear reactor when fuel rods melt is called NUCLEAR MELTDOWN

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Assume you have a sealed jug that only contains air. If you heat the air in the jug it will have a higher temperature. What are
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Explanation:  expands

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Gerry and his family have moved into a new home with a great backyard. In the yard, they plan to have a garden, a lawn, and a pa
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4 years ago
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Group 17 elements (for example, chlorine) in the periodic table are known as
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Explanation:

The answer is halogens

Halogens are reactive non metallic elements that form strongly acidic compounds with Hydrogen to form simple salts

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