Use coefficients of products and reactants to balance the number of atoms of an element on both sides of a chemical equation.
A double covalent bond.
<h3>Explanation</h3>
As their name suggest, ionic bonds are forces between ions of opposite charges. Ionic bonds involve the transfer of electrons from one atom to another. Such transfer can't occur between two carbon atoms. They belong to the same element and have the same tendency to gain or lose electrons. As a result, the bond between them cannot be ionic.
Ion dipole is a force <em>between</em> an ion and a molecule. The bond between the two carbon atoms is located <em>within</em> an organic molecule. The force between the two carbon atoms can't be ion dipole, either.
There are four valence electrons in each carbon atom. Each of them needs four more electrons to achieve an octet. They would achieve that octet by sharing four electrons with other atoms. Each shared electron pair acts as a covalent bond. Each hydrogen atom demands one more electron and would share only one electron with the carbon atom. The first carbon atom in this question shared two electrons with two hydrogen atoms. It needs to share two more with the other carbon atom so that it could achieve an octet. As a result, it would share two pairs of electrons, which will make a double covalent bond between the two carbon atoms.
Mobile water supply operations, such as water shuttles or relay pumping, must be performed<u> In rural areas without public water </u><u>distribution systems</u>
What operation is the pumping station started at the fire scene to return the water line to the water source? Reverse position. Water extinguishes the fire by absorbing heat and cooling the burning material.
Dry Barrel Hydrant
This type of hydrant is very common in areas with sub-zero weather. In these areas, the hydrant barrel must be dried to prevent the water in the hydrant barrel from freezing.
When should firefighters stop the flow of water from an automatic sprinkler system in a building? After the fire is under control.
If you are involved in a car or vehicle accident, the first thing you should do is call the police. If contacted, police can verify the identity, insurance, and driver's license status of anyone involved with the vehicle. This may seem like a simple step, but it is very important.
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Answer:
physical change
Explanation:
it doesnt change it chemically
Answer:
0.2 M is the concentration of the resulting solution
Explanation:
M is a unit for concentration which means mole of solute in 1L of solution.
According to the received information, we have 4 g in 500 mL of solution.
In 0.5L we have 4 g of solute
In 1L we have (1 .4)/0.5 = 8 g of solute
Let's convert the mass in mole
Mass / Molar mass = Mole
Molar mass NaOH = 40 g/m
8g / 40 g/m = 0.2M
