Given a sample of three unknown solids, we would be able to deduce which are ionic solids by their melting and boiling points, conductivity in water, and the insulation they provide.
<h3>What are Ionic solids?</h3>
- An ionic solid is a solid formed by ionic bonds.
- They are the solid version of ionic compounds, which are held together by strong electrostatic energies.
<h3>What properties do they possess?</h3>
- Among their many properties, ionic solids possess high melting and boiling points.
- These solids are also known to conduct electricity well <em><u>when </u></em><em><u>dissolved </u></em><em><u>into </u></em><em><u>water</u></em>, however, this can be tested after melting them as they <u>will not conduct electricity in a solid state</u>.
- A final property that we can use to identify them is that they provide a good means of insulation.
- Each of these properties can be tested and will allow us to determine the ionic solids amongst the samples.
Therefore, we can find the ionic solids amongst the samples by testing their melting and boiling points, conductivity in water, and the insulation they provide, given that each of these should provide high values to indicate an ionic solid.
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Answer is: 31,45%.
mrs₁(C₉H₁₆O₄-<span>azelaic acid) = 12g.
mr</span>₂(C₉H₁₆O₄) = 50g.
ω₂(C₉H₁₆O₄) = 15% = 0,15.
mrs₂(C₉H₁₆O₄) = mr₂·ω₂ = 50g·0,15 = 7,5g.
mrs₃(C₉H₁₆O₄) = mrs₁ + mr₂ = 12g + 7,5g = 19,5g.
mr₃ = mr₂ + mr₂ = 50g + 12g = 62g.
ω₃ = mrs₃÷mr₃ = 19,5g ÷ 62g = 31,45% = 0,3145.
Answer : The formal charge on central Cl atom is -1.
Explanation :
The given molecule is,
First we have to determine the total number of valence electrons in,
As we know, chlorine has 7 valence electrons.
Total number of valence electrons in = 3(7) + 1 = 22 electrons
Electrons used in bonding pair = 4
Electrons used as lone pair = 22 - 4 = 18
Now we have to calculate the formal charge on central Cl atom.
- Formal charge = Number of valence electrons of a central atom - (2 × Number of lone pairs) - Number of bond pairs
Formal charge on central Cl atom = 7 - (2 × 3) -2 = -1
Therefore, the formal charge on central Cl atom is -1.
The lewis-dot structure of is shown below.
Explanation:
Since, the given reaction is
Sum of masses on both reactant and product side is as follows.
235.043924 + 1.008665 = 139.921620 + 93.915367 + (2 × 1.008665)
= 0.198272 u
As it is known that relation between energy and mass is as follows.
Energy produced =
Since, 1 u = 931.494 MeV/. Putting this value into the above formula as follows.
Energy produced =
=
= 184.69 MeV
As 1 MeV equals joules.
Hence, 184.69 MeV will be converted into joules as follows.
= J
= J
Thus, we can conclude that energy released in this reaction is J.
That would be the waxing and waning crescents.
Hope it helps!