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aleksandrvk [35]
3 years ago
5

In Niels Bhor's model of the atom, electrons move

Chemistry
1 answer:
exis [7]3 years ago
5 0
Bohrs model says that electrons move in fixed shells (which have fixed distances) around the nucleus of an atom. 
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Difference between proton and electron​
Vanyuwa [196]

Answer:

An electron is a negatively charged component of an atom

the proton is a positively charged body.

Explanation:

3 0
3 years ago
Calculate the concentration of formate in a 100mm solution of formic acid at ph 4.15. The pka for formic acid is 3.75
MissTica

The molarity of formic acid is 100 mM or 100\times 10^{-3}M. The dissociation reaction of formic acid is as follows:

HCOOH\leftrightharpoons HCOO^{-}+H^{+}

The expression for dissociation constant of the reaction will be:

K_{a}=\frac{[HCOO^{-}][H^{+}]}{[HCOOH]}

Rearranging,

[HCOO^{-}]=\frac{K_{a}[HCOOH]}{[H^{+}]}

Here, pH of solution is 4.15 thus, concentration of hydrogen ion will be:

[H^{+}]=10^{-pH}=10^{-4.15}=7.08\times 10^{-5}M

Similarly, pK_{a}=3.75 thus,

[K_{a}=10^{-pK_{a}}=10^{-3.75}=1.78\times 10^{-4}M

Putting the values,

[HCOO^{-}]=\frac{(1.78\times 10^{-4}M)(100\times 10^{-3}M)}{(7.08\times 10^{-5}M}=0.2511 M

Therefore, the concentration of formate will be 0.2511 M.

4 0
3 years ago
The number of moles of solute in 200.ml of a 0.500 m solution is
IrinaK [193]

Answer:

I believe the answer is 0.100.

Explanation:

Hope my answer has helped you!

8 0
3 years ago
To draw the Lewis structure of the polyatomic ion,CIO3 you would have to _____ those in the structures of Cl, O, O, and O. Selec
NikAS [45]
D. Add one electron to, 
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3 years ago
A solid substance turns into a liquid. Which best describes this change?
nordsb [41]
Melting? not really sure what type of answer they are going for but the substance is going through the melting phase
8 0
3 years ago
Read 2 more answers
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