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timurjin [86]
3 years ago
13

Which is a factor in determining the average atomic mass of an element

Chemistry
1 answer:
shtirl [24]3 years ago
4 0

The mass numbers of the different isotopes of that element are averaged according to their respective abundances in nature.

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What percentage of known species are invertebrates?
ehidna [41]

95 percent of species known are invertebrates

6 0
3 years ago
Is the following sentence true or false carbon atoms can only form a single bond between other carbon atomd?
Norma-Jean [14]
Carbon atom has 4 valence electron and can form 4 bonds with carbon and other atoms and it can also form single, double and triple bond with other carbon atoms.
So, the statement is false.
7 0
4 years ago
The phenolic indicator (In-OH)has approximately the same pKa as a carboxylic acid. Which H is the most acidic proton in In-OH? C
Sidana [21]

The –OH+ group is most acidic proton in ln-OH as shown in figure (a). The proton is circled in the figure.

The stabilisation of the conjugate base produced is stabilises due to resonance factor. The possible resonance structures are shown in figure (b).

The acidity of a protonated molecule depends upon the stabilisation of the conjugate base produced upon deprotonation. The conjugate base of ln-OH is shown in figure (a).  

The possible resonance structures are shown in figure (b). As the number of resonance structures of the conjugate base increases the stabilisation increases. Here the unstable quinoid (unstable) form get benzenoid (highly stable) form due to the resonance which make the conjugate base highly stabilise.

Thus the most acidic proton is assigned in ln-OH and the stability of the conjugate base is explained.    


4 0
3 years ago
What us the definition of half-life?
UNO [17]
Half-life is the time required for the amount of something to fall to half its initial value. This term is usually used in nuclear physics to describe how quickly unstable atoms undergo decay, or how long stable atoms survive, radioactive decay, and it is also used more generally of any type of exponential or non-exponential decay.

In simpler terms: this is when an isotopes radioactivity is cut in half
7 0
3 years ago
Which of the following best describes a metathesis reaction?
densk [106]

Answer:

B

Explanation:

A metathesis reaction is a reaction in which cations and anions change partners.

A general equation for a metathesis is

AX+CY→AY+CX, where A and C are cations, and X and Y are anions.

There are three possible products of a metathesis reaction.

A. an insoluble (solid) precipitate

B. water (from neutralization reaction)

C. an insoluble gas that bubbles out of solution

Metathesis reactions are also called double replacement reactions and double displacement reactions.

4 0
3 years ago
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