Complete the paragraph to describe the characteristics of a silicon tetrahydride molecule (SiH4). The Lewis structure and table of electronegativities are given.
Answers
Answer: The correct answer is polar, tetrahedral and non-polar.
Explanation:
It is given a compound which is silicon tetrahydride having formula
The electronegativities of silicon and hydrogen are 1.9 and 2.1 respectively.
Difference in electronegativity = 2.1 - 1.9 = 0.2
From above, some difference in the electronegativities of the atoms is there. This means that bond polarity of this molecule is polar. If the difference would have been 0, the bond polarity of the molecule is taken as non-polar.
- To determine the molecular shape of the given molecule, we calculate the hybridization of this molecule. The equation used for this is:
where,
V = number of valence electrons present in central atom i.e. Silicon = 4
N = number of monovalent atoms bonded to central atom = 4
C = charge of cation = 0
A = charge of anion = 0
Putting values in above equation, we get:
As, the total number of electron pairs is 4, this means that the hybridization of this molecule will be and the molecular shape will be tetrahedral.
- The net dipole moment of the molecule is 0 because of the symmetry of the molecule. Thus, the molecule is considered as a non-polar molecule.
Hence, the correct answer is polar, tetrahedral and non-polar.
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An example similar to this one would be diamond. It is made up of carbon bonds. But once you take a (real) diamond out of the ground, it very slowly, not visible to the human eye, yet surely is turning back into graphite. (another substance made by carbon bonds)
i hope this helped.
B:Radiation moves from a warmer object to a cooler object
C:Radiation moves from a warm object to an object of the same temperature.
D:Radiation moves from a cool object to an object of the same temperature
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The answer to your question is B:Radiation moves from a warmer object to a cooler object
Answer: B
Explanation:LATE IM LATE BUT ITS
B. network solid
C. metal
D. nonmetallic solid
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Answer:
The correct answer option is B. network solid.
Explanation:
A network solid has the highest melting point.
The reason being that all of the atoms in this type of solid are covalently bonded to one another so the covalent bonds must be broken throughout the substance.
These covalent bonds holding the solid together are stronger than the ionic bonds. So it means that more heat energy is needed to break these bonds and therefore a higher temperature is required for it.
Final answer:
Network solids have the highest melting point.
Explanation:
What type of solid has the highest melting point?
The correct answer is B. network solid. Network solids, also known as covalent network solids, have the highest melting points among the options listed. These solids are held together by a three-dimensional network of covalent bonds, which require a significant amount of energy to break and hence have high melting points.
For example, a diamond is a network solid consisting of carbon atoms bonded together in a strong network of covalent bonds. It has an extremely high melting point of around 3,500°C.
Learn more about Melting Point here:
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Answer:
Sometimes reading it again will help. Sometimes it really is that simple. The information doesn’t all find its way
Ask questions. I will always do my best to explain things to students, but it helps if I know when they haven’t
Figure out the best time for you to learn. I mean the best time for you to study on your own. Are you a night owl
Take good notes. I’m not going to tell you how to take good notes – it’s different for everyone.
Explanation: