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3 years ago

Were are electrons located

Chemistry

2 answers:

lukranit [14]3 years ago

8 0

Electrons are found in the cloud that's surrounded the nucleus of an atom

xeze [42]3 years ago

5 0

Electrons found outside the nucleus in what's called electron cloud

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Which of the following is a chemical change?

ValentinkaMS [17]

Answer: A - it is changing into a new substance

the other answers are just physical changes

4 0

3 years ago

A specific combination of bonded atoms which always react in the same way is known as

grigory [225]

A specific combination of bonded atoms which always react in the same way, regardless of the particular carbon skeleton is known as the functional group. These are specific groups of atoms or bonds within organic molecules that accounts for the characteristic chemical reactions of those molecules. Examples of functional groups are the Carbonyl group, alkyl Halides, aldehydes and ketones among others.

4 0

4 years ago

Your company has developed an organic molecule with commercial potential and you know how to produce it in the lab. You want to

Lena [83]

Answer:

(B) continually remove products

(C) increase the concentration of reactants

Explanation:

You can drive the production rate of an equilibrium reaction by handling several factors: temperature, reactant concentrations, and product concentrations are the main of those factors.

The thermodynamic variable that tells whether a chemical reaction is spontaneous is the free energy, ΔG:

ΔG < 0 represents a driving force in the forward direction,

ΔG > 0 represents a driving force in the reverse direction,

ΔG = 0 represents that the system is at equilibrium.

ΔG is related with ΔG° per the expression:

ΔG = ΔG° + RT ln Q

Where Q represents the ratio between the molar concentration of the products (each raised to its stoichiometric coefficient) and the molar concentrations of the reactants (each raised to its stoichiometric coefficient).

Since, you want to increase your production, means you want to favor the forward reaction and that means that you want to make ΔG more negative.

So, you want to make the term RT lnQ more netative.

Logarithm function of a rational expression gets more negative when the numerator decreases or the denominator increases.

So, you want either reduce the amount of products or increase the amount of reactants, which is given by the options B and C:

(B) continually remove products

(C) increase the concentration of reactants

Enzymes are a kind of catalyst. In an equilibrium reaction, a catalys speeds up both the forward and reverse reaction rates equally, so the equilibrium concentrations will not change. So, adding an enzyme (choice A) would help if you, continually remove products (B) or increase the concentration of reactants (C).

Adding products to get the reaction primed (D) will not help because that just would drive to the consumption of part of the products to obtain some reactants until reaching the equilibrium.

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3 years ago

Assume you do not know which peak in GC chromatogram corresponds to each alkene (and you are not sure whether the one with lower

Zinaida [17]

GC chromatograms often already have a library of compounds to determine what the substance is. In case the compound cannot be found in the library, one common alternative scientists use when performing is spiking.

Spiking involves gradually increasing the concentration of one specific compound, and looking for a rise in peak height. Here, you can identify which peak corresponds to the compound you spiked. You can do this for each alkene, to determine its peak and retention time.

7 0

3 years ago

Is combining ammonium chloride and water a physical or chemical change

kenny6666 [7]

No, ammonium chloride in water is not a physical reaction. It is a chemical reaction. Hope this helps!

7 0

3 years ago