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3 years ago

Please Please Help Me In This Homework!!!!!

Chemistry

1 answer:

alexgriva [62]3 years ago

5 0

For total number of electrons, add the numbers from the configuration up.
Ex. 2+8+3+2=16 so total # is 16
For the name of the element, look at the periodic table and see which element number matches ur total number of electrons.
Ex. #16 on the periodic table is Sulfur.
I'm not exactly sure what listed electron config means.

Btw I might be really wrong but anything is better than leaving it blank...

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3 years ago

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when reacting with Na with Cl2, we calculated that the theoretical yield should be 13.0 grams. our actual yield was 12.5 grams.

navik [9.2K]

Answer:

Percentage yield is 96.15%

Explanation:

Theoretical yield = 13.0g

Actual yield = 12.5g

Percentage yield = ?

Equation of reaction

2Na + Cl₂ → 2NaCl

Percentage yield = (actual yield / theoretical yield) * 100

Percentage yield = (12.5 / 13.0) * 100

Percentage yield = 0.9615 * 100

Percentage yield = 96.15%

Percentage yield of NaCl is 96.15%

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3 years ago

Tell whether the following pairs of compounds are identical, constitutional isomers, stereoisomers, or unrelated. (a) cis-1,3-Di

Aleks04 [339]

Answer:

(a) Constitutional Isomers

(b) Constitutional Isomers

Explanation:

Constitutional isomers are also known with the name Structural Isomers. These are the compounds which have same chemical formula but differ in arrangement of atoms i.e. structure.

Both the compounds cis-1,3-dibromocyclohexane and trans-1,4-dibromocyclohexane have the same chemical formula $C_{6} H_{10} Br_{2}$ but have different structure as shown in the image below.

In the second case the compounds 2,3-dimethylhexane and 2,3,3-trimethylpentane, both have same chemical formula $C_{8} H_{18}$ but have different structures which is shown in the image below.

Thus it is clear that in both the groups (a) and (b) the given compounds are Constitutional Isomers.

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3 years ago

a phase change from B to A will represent a loss of energy. what is the term to describe this transition if B is the liquid phas

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Answer:

freezing

Explanation:

The process in which a liquid changes to a solid is called freezing or solidification. Energy is taken away during freezing.

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Answer:

50%

Explanation:

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3 years ago