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nadezda [96]
3 years ago
12

According to the law of conservation of matter, which statement about chemical reactions is true?

Chemistry
2 answers:
ohaa [14]3 years ago
7 0

Answer:

c. atoms cannot be created or destroyed by chemical reactions

Explanation:

Pavlova-9 [17]3 years ago
5 0
It's C
..............
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An atom has the following electron configuration.
otez555 [7]

Explanation:

10 valence electron are there

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2 years ago
The volume of a sample of water is 2.5 mL the volume of the sample in liters is
lisabon 2012 [21]

Answer:

0.0025Litters

Explanation:

2.5ml= 2.5x10^-3l

2.5ml= 0.0025l

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2 years ago
Gases are measured in different units. Which of the following measurements of pressure are equal? Select all that apply.
viva [34]

Explanation:

Pressure of a gas is the combined force with which the molecules bombard a unit area of the wall of the container.

    1 atm  = 760mmHg

               = 760torr

               = 101325Pa

               = 101325Nm⁻²

 1mmHg  = 1torr

        1Pa = 1Nm⁻²

101.325 kPa  and 101,325 Pa are the same

           1000Pa = 1kPa

101,325 Pa  and 1 atm

1atm and 101.325 kPa

6 0
2 years ago
A 0.100 m solution of a monoprotic weak acid has a ph of 3.00. what is the pka of this acid?
Lelechka [254]
Answer is: pKa for the monoprotic acid is 5.<span>
Chemical reaction: HA(aq) </span>⇄ A⁻(aq) + H⁺<span>(aq).
c(monoprotic acid) = 0.100 M.
pH = 3.00.
[A</span>⁻] = [H⁺] = 10∧(-3).<span>
[A</span>⁻] = [H⁺] = 0.001 M; equilibrium concentration.<span>
[HA] = 0.1 M - 0.001 M.
[HA] = 0.099 M.
Ka = [A</span>⁻]·[H⁺] / [HA].<span> 
Ka = (0.001 M)² / 0.099 M.
Ka = 0.00001 M = 1.0·10</span>⁻⁵ M.
<span>pKa = -logKa = 4.99.

</span>
7 0
3 years ago
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What 4 elements did people originally think made up everything?
ioda

Earth, Air, Water, and Fire

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3 years ago
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