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Masteriza [31]
3 years ago
6

-What important role does chemistry play in society?

Chemistry
1 answer:
Serggg [28]3 years ago
4 0

Answer:

Chemistry helps in improving the quality of our life, it helps in improving food production, building & construction, military and space science, clothing materials, medicine and transportation.

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Who were the scientists who won the nobel prize for the atomic model?
AleksAgata [21]

Answer:

Here's what I find.  

Explanation:

Many scientists contributed to our model of the atom.

Among those who received the Nobel Prize for their work are:

1906 — J.J. Thomson        — discovery of the electron

1908 — Ernest Rutherford — nuclear model of the atom

1922 — Niels Bohr             — planetary model of the atom

1922 — Albert Einstein      — quantum mechanical model of the atom

1935 — James Chadwick  — discovery of the neutron

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3 years ago
If an atom the atomic number 10 and the mass number 12, how many VALENCE electrons does it have?
myrzilka [38]
The answer for this is 22
7 0
2 years ago
Which of the following statements is true?
goldfiish [28.3K]

Answer:

D

Explanation:

Heat sometimes gets "lost" when work is done

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2 years ago
Read 2 more answers
consider an exceptionally weak acid, HA, with Ka= 1 x 10-20. you make 0.1M solution of the salt NA. what is the pH.
iogann1982 [59]

Answer:

pH=10.5

Explanation:

Hello,

In this case, the dissociation of the given weak acid is:

HA\rightleftharpoons H^++A^-

Therefore, the law of mass action for it turns out:

Ka=\frac{[H^+][A^-]}{[HA]}

That in terms of the change x due to the reaction extent is:

1x10^{-23}=\frac{x*x}{0.1-x}

Thus, by solving with the quadratic equation or solver, we obtain:

x=31.6x10^{-12}M

Which clearly matches with the hydrogen concentration in the solution, therefore, the pH is:

pH=-log(-31.6x10^{-12})\\pH=10.5

Regards.

5 0
3 years ago
What type of air mass most likely located over atlanta and Georgia
LuckyWell [14K]
Answer is: continental tropical <span>type of air mass most likely located over Atlanta and Georgia.
</span><span>Atlanta and Georgia have a </span>humid subtropical climate (<span>hot and humid summers, mild winters)</span><span> with four distinct seasons and good precipitation year round.
</span>Gulf of Mexico<span> can bring warm air and there is cold air from Artic.</span>
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3 years ago
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