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aniked [119]
3 years ago
8

What is the charge on an electron? ​

Chemistry
1 answer:
Over [174]3 years ago
5 0

Answer:

Electrons have a negative charge

hope this was helpful (plz vote brainliest, I would appreciate it!) :)

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Water was added to 175 mL of a KOH solution until the volume was 250 mL and the molarity was 0.315 M. What was the molarity of t
Len [333]

Answer:  The molarity of the initial concentrated solution is 0.450 M

Explanation:

According to the dilution law,

M_1V_1=M_2V_2

where,

M_1 = Molarity of concentrated KOH solution = ?

V_1 = volume of  concentrated KOH solution = 175 ml

C_2 = concentration of diluted KOH solution= 0.315 M

V_2 = volume of diluted KOH solution= 250 ml

Putting in the values, we get:

M_1\times 175=0.315\times 250

M_1=0.450M

Thus the molarity of the initial concentrated solution is 0.450 M

6 0
2 years ago
Consider these ground-state ionization energies of oneelectron species:
SVETLANKA909090 [29]

Answer:

Explanation:

general expression for the ionization energy of any one-electron species.

=  z² x ground level energy / n²

z is atomic no , n is energy level .

ground level energy of

 H = 1.31 x 10³ kJ/mol

He⁺ = 2² x  1.31 x 10³ kJ/mol  =  5.24 x 10³ kJ/mol

Li²⁺ = 3² x  1.31 x 10³ kJ/mol   = 1.18 x 10⁴ kJ/mol

b ) the ionization energy of B⁴⁺.

= 5² x 1.31 x 10³ kJ/mol  = 32.75 x 10³ kJ/mol  

c )  minimum energy required to remove the electron from the n = 3 level of He⁺ per mole

= 5.24 x 10³ / 9  kJ/mol

= 5.82 x 10² kJ/mol

= 5.82 x 10² x 10³ / 6.02 x 10²³ J

.9667 X 10⁻¹⁸ J

= .9667 X 10⁻¹⁸ / 1.6 X 10⁻¹⁹ eV

= 6.042 eV

= 1237.5 / 6.042

= 204.82 nm

=

d )

3 0
3 years ago
The pH of a solution in which the concentration of H+ is 0.010M will be:
shusha [124]

B: 2

If it's right plz give brainliest lol <3

7 0
2 years ago
HELP ME PLEASE ASAP. I'LL MARK YOU BRAINLIEST <br> ITS NUMBER 23.
Ivanshal [37]

Answer:

The answer is A

Explanation:

5 0
2 years ago
Why do all chemical changes occur
GenaCL600 [577]

Answer:

Chemical Reactions. ... Reactions occur when two or more molecules interact and the molecules change. Bonds between atoms are broken and created to form new molecules.

6 0
3 years ago
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