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3 years ago

** 2. Where are each of the three particles located within the atom?

Chemistry

1 answer:

dedylja [7]3 years ago

5 0

Answer:

protons and neutrons located within the nucleus, with electrons in orbitals surrounding the nucleus.

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Part A In a particular experiment at 300 ∘C, [NO2] drops from 0.0138 to 0.00886 M in 374 s . The rate of disappearance of NO2 fo

sweet-ann [11.9K]

Answer:

The rate of disappearance of $NO_2$ for this period is $-1.32\times 10^{-5} M/s$

Explanation:

Initial concentration of $NO_2$ = x = 0.0138 M

Final concentration of $NO_2$ = y = 0.00886 M

Time elapsed during change in concentration = Δt = 374 s

Change in concentration , $\Delta [NO_2]$ = y - x = 0.00886 - 0.0138 M = -0.00494 M

The rate of disappearance of $NO_2$ for this period is:

$\frac{\Delta [NO_2]}{\Delta t}=\frac{-0.00494 M}{374 s}=-1.32\times 10^{-5} M/s$

4 0

3 years ago

H A and H B are both weak acids in water, and HA is a stronger acid than HB. Which of the following statements is correct? Selec

lubasha [3.4K]

Answer:

B is a stronger base than A^-, which is a stronger base than H2O, which is a stronger base than CI^-

Explanation:

The general equation for each acid is:

HA(aq) + H2O(ac) ⇄ H3O+(aq) + A-(aq)

HB(aq) + H2O(ac) ⇄ H3O+(aq) + B-(aq)

When these acids dissociate into its ions in water they lose a proton (H+), so they are proton donors (acids) and H2O is the proton acceptor (base). This reaction produces a conjugate acid and a conjugate base.

Conjugate base is what remains of the acid molecule after it loses a proton:

HA = acid A- Conjugate base

HB = acid B- Conjugate base

A conjugate acid is formed when the proton is transferred to the base

H2O = base H3O+ = Conjugate acid

The stronger acid will produce a weaker base. According to this, if HA is a stronger acid than HB, A- would be the weaker base (B- is the stronger base).

Compared with water, A- and B- are stronger bases because when they compete for a proton they have much greater affinity for H+ than water does and the equilibrium position will lie far to the left. (HA and HB are weak acids)

Finally Cl- is the weakest base because it comes after dissociation of HCl which is a strong acid

HCl(aq) + H2O → H3O+(aq) + Cl-(aq)

Note there is no double arrows, equilibrium lies far to the right. A strong acid yields a weak conjugate base it means one that has a low affinity for a proton.

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3 years ago

The following forces act on an object: 3N left, 2N up, 1N right, 2N down.

Ymorist [56]

The answer is 2N left.

8 0

4 years ago

Which statement best describes a typical difference that could be found between the "Analysis" and "Conclusion" sections of a

IgorC [24]

The statement “Only the “Conclusion” section discusses whether the original hypothesis was supported, and both sections suggest further research”, best describes the difference between analysis and conclusion.

Answer: Option 4

<u>Explanation: </u>

In research, we do experiments and derive the results. Then, those results were analyzed by us. In this analysis part, we compare our results with the related results published elsewhere. Also, we correlate the similarities and point out the differences between our analysis and other reported results.

In conclusion part, we have to check hypothesis or it supported. And, we summarise our analysis and figure out the further research need to be done on that to improvise our research. So, the final statement is the correct option which best describes the difference between analysis and conclusion.

3 0

3 years ago

All but one product of the light dependent reaction of photosynthesis is utilized in the light independent reaction. That is

harina [27]

Answer: ATP Adenosine triphosphate

Explanation: During light reaction plants produce glucose and as well as ATP and NADPH as another products. Now during the Dark or light independent reaction there is no presence of light energy to fuel the process so ATP is used as an alternative to fix CO2 molecules.

5 0

3 years ago