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Zinaida [17]
4 years ago
13

Which statement best describes a physical change?

Chemistry
1 answer:
yulyashka [42]4 years ago
7 0
The answer is the third one .
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Which of the following gases is the most abundant in a volcanic eruption?
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Option C: Sulfur Dioxide is the answer  

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3 years ago
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Draw the major organic substitution product(s) for (2R,3S)-2-bromo-3-methylpentane reacting with the given nucleophile. Indicate
Ede4ka [16]

Answer:

The final product of the reaction is (<em>2S,3S</em>)-2-ethoxy-3-methylpentane.

Explanation:

The given reaction undergoes S_{N}2  mechanism in which the nucleophile attacks the backside and it is substituted by the elimination of bromine.

Due to the backside attack of nucleophile , the inverse in stereo-chemistry is observed.

After the substitution of ethoxy group, the configuration is assigned according to the priority it shows clock wise direction(R) - configuration.

When hydrogen faces the front side , it results shows inverse configuration i.e, S- configuration.

The chemical reaction is as follows.

 

6 0
3 years ago
How many valence electrons are in N2O? SeCl2? PBr3?
8090 [49]
Here is the answer for the three of them
<span>N20 = 16 e-
</span><span>SeCl2 =20
</span><span>PBr3 = 26 
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5 0
3 years ago
Molarity of a salt water solution of "0.47" moles of NaCl dissolved in a volume of 0.25L
asambeis [7]

Answer:

1.88 M

Explanation:

The following data were obtained from the question:

Mole of NaCl = 0.47 mole

Volume of solution = 0.25L

Molarity =?

Molarity is defined as the mole of solute per unit litre of the solution. It can represented mathematically as:

Molarity = mole /Volume

Using the above formula, the molarity of the salt water solution can be obtained as follow:

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5 0
3 years ago
A nuclear reaction that causes a change in the nucleus of an atom of an element which converts the atom into another
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It might be "Radioactive Decay "  check with someone to conform

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3 years ago
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