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aleksley [76]
3 years ago
7

PLS HELP THIS IMPORTANT

Chemistry
2 answers:
Ksenya-84 [330]3 years ago
8 0

Answer:

Explanation:

Physical change is a temporary and reversible change in which the physical properties of the substance changes without altering the composition of the substance Eg Melting of ice while chemical change is a permanent and not so easily reversible change in which the identity of the substance is altered to produce one or more substances Eg Combustion

sergey [27]3 years ago
6 0

Answer:

Physical change is a rapid change, while chemical change can be a time taking process. In chemical change, new products are produced, while physical change can change the shape or size of said object, but no new products are formed.

Explanation:

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Draw the structure for cis-2,3-dibromo-2-hexene.
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First, draw the 2-hexene. Th is is a molecule of six carbons with a double bond in the second carbon:

      CH3 - CH = CH2 - CH2 - CH2 - CH3

Secong, put one Br on the second carbon and one Br on the third carbon:

    CH3 - CBr = CBr - CH2 - CH2 - CH3

Third, cis means that the two Br are placed in opposed positions, this is drawn with one Br up and the other down. So, you need to represent the position of the Br in the space:


      H   Br          H     H      H
       |    |             |       |       |
H - C - C = C -  C  -  C  -  C - H
       |           |      |       |       |
      H          Br   H     H      H

The important fact to realize is that the two Br are in opposed sides of the molecule.
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3 years ago
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5 0
3 years ago
If there are 3.10 moles of O, how many moles of each of the compounds are present?
Burka [1]

Explanation:

The question pretty  much requires us to find the amount of moles of each compounds based on the number of moles of O given.

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Answer: C

Explanation:

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\mathrm{Mg \: + \: CuO \rightarrow Cu\: + \: MgO}

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Products of the reaction: Magnesium oxide and metallic copper.

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