Most covalent compounds have relatively low melting points and boiling points. Covalent compounds usually have lower enthalpies of fusion and vaporization than ionic compounds. Covalent compounds tend to be more flammable than ionic compounds. When dissolved in water, they don't conduct electricity.
Source: https://socratic.org/questions/what-are-the-main-properties-of-covalent-compounds
Answer:
Third Law of motion. (answer C)
Explanation:
This is an example of Newton's Third Law of motion which normally translates into Action/Reaction. That is : the expelled air exerts a force in the direction opposite to that of the motion of the air that goes out. It is the same as propulsion in a rocket.
Answer :
Formal charge on C: (-1)
Formal charge on N: (0)
Net charge: (-1)
Explanation :
First we have to determine the Lewis-dot structure of
.
Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.
In the Lewis-dot structure the valance electrons are shown by 'dot'.
The given molecule is, ![CN^-](https://tex.z-dn.net/?f=CN%5E-)
As we know that carbon has '4' valence electrons and nitrogen has '5' valence electrons.
Therefore, the total number of valence electrons in
= 4 + 5 + 1= 10
According to Lewis-dot structure, there are 6 number of bonding electrons and 4 number of non-bonding electrons.
Now we have to determine the formal charge for each atom.
Formula for formal charge :
![\text{Formal charge}=\text{Valence electrons}-\text{Non-bonding electrons}-\frac{\text{Bonding electrons}}{2}](https://tex.z-dn.net/?f=%5Ctext%7BFormal%20charge%7D%3D%5Ctext%7BValence%20electrons%7D-%5Ctext%7BNon-bonding%20electrons%7D-%5Cfrac%7B%5Ctext%7BBonding%20electrons%7D%7D%7B2%7D)
![\text{Formal charge on C}=4-2-\frac{6}{2}=-1](https://tex.z-dn.net/?f=%5Ctext%7BFormal%20charge%20on%20C%7D%3D4-2-%5Cfrac%7B6%7D%7B2%7D%3D-1)
![\text{Formal charge on N}=5-2-\frac{6}{2}=0](https://tex.z-dn.net/?f=%5Ctext%7BFormal%20charge%20on%20N%7D%3D5-2-%5Cfrac%7B6%7D%7B2%7D%3D0)
Net charge = -1 + 0 = -1
Answer:
The percentage of volume of ethanol is 35%.
<u>Explanation:</u>
The percentage of volume of ethanol is calculated by
Percent of volume of ethanol = (volume of X / total volume) * 100
We are going to assume these volumes will be added together to make 100mL.
Percent volume of Ethanol = (volume of ethanol / total volume) * 100
= 35mL / 100mL * 100
= 35%
Explanation:
Enantiomers are pairs of non-identical molecules that are non-superimposable mirror images of each other and that have at least one chiral carbon or chiral center, making them chiral compounds. They have similar chemical properties, except for when they interact with other chiral compounds.