Answer:
IUPAC name
3-ethyl-4-methylpent-2-ene
Explanation:
Other names of this compound are
2-Pentene,3-ethyl-4-methyl
2-isopropyl-1-methyl-1-butene
IUPAC naming rules
1. start numbering the chain from the functional group. In this compound we start from the carbon on left side of the double bond.
2. Here we can see that at position 3 there is an ethyl group. So we write it as 3-ethyl. Which means that there is an ethyl group at position 3.
3. At position 4 we can see that there is a methyl group attached to the main chain, so we write it as 4-methyl.
4. Now we count the total number of carbons in the main chain. As we can see that there are 5 carbons in the remaining or parent chain, so we write it as "pent" from pentane.
5. At position 2 we can see that there is a double bond in the main chain, so we write it as 2-ene.
6. So the IUPAC name of the compound will be 3-ethyl-4-methylpent-2-ene
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Answer:
For and object to sink, it must have more density than the liquid in which it is placed. For example, if you have a glass of water and a metal spoon, the spoon will sink because it is both heavier than the water, therefore having more density.
The answer is D because one of them is sharing their electrons with the other.
At room temperature the air is Gas
Answer:
- <em><u>A physical change has occurred, with no energy change.</u></em>
Explanation:
When a pencil lead is broken there is not change of any chemical properties, therefore it is not a chemical change, but just a physical change. In this case the change is just the number of pieces and dimensions.
Chemical changes always involve the formation of new different substances; the bonds between the atoms of the starting substances (reactants) breake and new bonds are formed leading to new substances (products) with different chemical composition (arrange of atoms). Chemical changes occur through chemical reactions.
Hence, if there is not change on the chemical composition, you think on physical changes. Physical changes include change in shape, size, state of matter (e.g. solid, liquid, gas). In the case of a pencil lead breaking, it is a change in shape and size.
Also, since energy has not been absorbed or released during the change, the energy of the pencil lead before having been broken is equal to the sum of the energies of the pieces of pencil lead obtained. So, this is a physical change with no energy changes.
Some examples of physical changes that include change in energy are the change of state (e.g. solid to liquid or liquid to gas) and the dissolution of a compound.