All categories

2 years ago

Where do reactions in a solid

Chemistry

1 answer:

alexgriva [62]2 years ago

3 0

Answer:

Explanation:

because solid stick together like magnetic and can feel every vibration

You might be interested in

In a 0.730 M solution, a weak acid is 12.5% dissociated. Calculate Ka of the acid.

Mamont248 [21]

Answer:

Approximately $1.30 \times 10^{-2}$ , assuming that this acid is monoprotic.

Explanation:

Assume that this acid is monoprotic. Let $\rm HA$ denote this acid.

$\rm HA \rightleftharpoons H^{+} + A^{-}$ .

Initial concentration of $\rm HA$ without any dissociation:

$[{\rm HA}] = 0.730\; \rm mol \cdot L^{-1}$ .

After $12.5\%$ of that was dissociated, the concentration of both $\rm H^{+}$ and $\rm A^{-}$ (conjugate base of this acid) would become:

$12.5\% \times 0.730\; \rm mol \cdot L^{-1} = 0.09125\; \rm mol \cdot L^{-1}$ .

Concentration of $\rm HA$ in the solution after dissociation:

$(1 - 12.5\%) \times 0.730\; \rm mol \cdot L^{-1} = 0.63875\; \rm mol\cdot L^{-1}$ .

Let $[{\rm HA}]$ , $[{\rm H}^{+}]$ , and $[{\rm A}^{-}]$ denote the concentration (in $\rm mol \cdot L^{-1}$ or $\rm M$ ) of the corresponding species at equilibrium. Calculate the acid dissociation constant $K_{\rm a}$ for $\rm HA$ , under the assumption that this acid is monoprotic:

$\begin{aligned}K_{\rm a} &= \frac{[{\rm H}^{+}] \cdot [{\rm A}^{-}]}{[{\rm HA}]} \\ &= \frac{(0.09125\; \rm mol \cdot L^{-1}) \times (0.09125\; \rm mol \cdot L^{-1})}{0.63875\; \rm mol \cdot L^{-1}}\\[0.5em]&\approx 1.30 \times 10^{-2} \end{aligned}$ .

5 0

3 years ago

Which of these statements explains the relationship among elements, compounds, and mixtures?

gladu [14]

A compound is where two or more elements have chemically bonded, and a mixture is where there are two or more elements are grouped together, but they are not chemically bonded.
An example of a mixture would be salt dissolved in water, and an example of a compound would be water (which is made up of 2 Hydrogen and 1 Oxygen bonded together)

tl;dr: I would go with B, basically.

6 0

3 years ago

.. can someone answer these quickly before I go to bed

elixir [45]

Ans

1. d.x-Rays

2. d.modern medical x-rays use stronger radiation than earlier types.

3. b.Radio waves have high frequency

4.a.Gamma radiation

5.b.Infrared radiation

6.a.Radio waves

<u>Explanation:</u>

A mammogram is an X-ray of the breast. Mammograms are commonly used to screen for breast cancer.

Radio-tracking technology assists in determining exactly where an animal is located at any instant in time and frequently what that animal is performing! Utilizing the data collected from tracking devices, scientists can conclude the day-to-day activities of an animal, the size of an animal's place range, what other animals share an animal's range and the types of habitats an animal practices.

Gamma-rays are the common energetic form of light and are generated by the most heated regions of the universe. Gamma rays are provided by such extreme events as supernova explosions or the elimination of atoms and by less exciting events, such as the breakdown of radioactive material in space.

8 0

3 years ago

Give the name for the molecular compound with the the formula P2I4.

jenyasd209 [6]

Answer:

P2I4 is otherwise known as "<em>Diphosphorus Tetraiodide</em>"

3 0

3 years ago

Read 2 more answers

Here are some questions about the elements, their properties, and periodicity. In each case. the correct answer is the name of a

vodomira [7]

Answer: Please provide more details of the elements to help answer the question