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fgiga [73]
3 years ago
9

Whats the correct order of these?

Chemistry
1 answer:
elena-14-01-66 [18.8K]3 years ago
6 0
Largest
5.9x10^2
1109
-0.041
-4.2x10^-3
-7.6x10^-5
smallest
You might be interested in
A fossil is found to have a 14 C 14C level of 70.0 70.0 % compared to living organisms. How old is the fossil?
natulia [17]

Answer:

The age of the fossil be 2.1987\times 10^{4} years.

Explanation:

Formula used :

N=N_o\times e^{-\lambda t}\\\\\lambda =\frac{0.693}{t_{\frac{1}{2}}}

where,

N_o = initial mass of isotope  C-14 = x

N = mass of the parent isotope left after the time, (t)  = 70.0% of x=0.07x

t_{\frac{1}{2}} = half life of the isotope  C-14 = 5730 years

\lambda = rate constant

Let the age of the fossil be t.

Now put all the given values in this formula, we get  t :

0.07x=x\times e^{-(\frac{0.693}{5730 years})\times t}

t=2.1987\times 10^{4} years

The age of the fossil be 2.1987\times 10^{4} years.

8 0
3 years ago
What would happen if you tried to cut a sheet of aluminum foil in half over and over again?
kodGreya [7K]

Answer:

Its properties remain unchanged as it is undergoing physical changes.

Explanation:

Hello.

In this case, since aluminum foil is made up of aluminum leaves having a 0.2-mm thick it is widely known that is deformed when wrinkled due to its tiny average thick. Moreover, when cut half over and over again smaller pieces are obtained every time it is done. Nevertheless, even when its shape and size can be modified via physical actions, its properties remain unchanged because cutting is a physical change which is not affecting its chemical composition.

Best regards.

7 0
3 years ago
A solution containing equal numbers of hydrogen ions and hydroxide ions is
igor_vitrenko [27]

Answer:

The answer to your question is: Neutral

Explanation:

A neutral solution is a solution whose pH is 7.

That means that this solution has the same amount of H⁺ and OH⁻.

Examples of neutral solutions:

- distilled water

- sugar solution

- table salt

- cooking oil.

4 0
4 years ago
Will Stephen hawking be important if he have not developed why or why not
stiks02 [169]

Answer:

Yes,he would still be important but, for an entirely different reason

Explanation:

Stephen hawking had amyotrophic lateral sclerosis, a motor neurone disease ,and in order to continue research on his disease,he would have been an important part of the research,even if he didn't become a theoretical physicist

5 0
3 years ago
The hydroboration of an alkene occurs in ___________ which places the boron of the borane on the ___________ carbon of the doubl
Nana76 [90]

Answer: The hydroboration of an alkene occurs in TWO CONCERTED STEP which places the boron of the borane on the LESS SUBSTITUTED carbon of the double bond. The oxidizing agent then acts as a nucleophile, attacking the electrophilic BORON and resulting in the placement of a hydroxyl group on the attached carbon. Thus, the major product of the hydroboration oxidation reaction DOES NOT follow Markovnikov's rule.

Explanation:

Hydroboration is defined as the process which allows boron to attain the octet structure. This involves a two steps pathway which leads to the production of alcohol.

--> The first step: this involves the initiation of the addittion of borane to the alkene and this proceeds as a concerted reaction because bond breaking and bond formation occurs at the same time.

--> The second step: this involves the addition of boron which DOES NOT follow Markovnikov's rule( that is, Anti Markovnikov addition of Boron). This is so because the boron adds to the less substituted carbon of the alkene, which then places the hydrogen on the more substituted carbon.

Note: The Markovnikov rule in organic chemistry states that in alkene addition reactions, the electron-rich component of the reagent adds to the carbon atom with fewer hydrogen atoms bonded to it, while the electron-deficient component adds to the carbon atom with more hydrogen atoms bonded to it.

8 0
3 years ago
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