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3 years ago

Which description best characterizes the motion of particles in a solid?

Chemistry

2 answers:

Pavlova-9 [17]3 years ago

7 0

Vibrating around fixed positions

anyanavicka [17]3 years ago

4 0

Answer: D!!

Explanation:

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Katie looks out her bedroom window on a clear night. The stars in the sky look like tiny points of light.

jok3333 [9.3K]

Answer:

The Sun looks bigger than other stars because its more closer to the earth than the stars.the farther anything is distant from us the tinier it will look

Explanation:

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3 years ago

Read 2 more answers

Hydrocyanic acid, HCN, is a weak acid. (a) Write the chemical equation for the dissociation of HCN in water. (b) Identify the Br

12345 [234]

Answer: a) $HCN(aq.)+H_2O\rightleftharoons H_3O^+(aq.)+CN^-(aq.)$

b) $HCN$ : acid $CN^-$ :conjugate base.

And, $H_2O$ : base $H_3O^+$ : conjugate acid.

c) $HCN(aq.)+NaOH(aq)\rightleftharoons NaCN(aq.)+H_2O(l)$

d) $NaCN(aq)\rightarrow Na^+(aq.)+CN^-(aq)$

e) $NaCN(aq)+HCl(aq)\rightarrow NaCl(aq.)+HCN(aq)$

Explanation:

a) Weak acid is defined as the acid which does not completely dissociates when dissolved in water. They have high pH. These releases $H^+$ ions in their aqueous states.

The equation for the dissociation of $HCN$ acid is given by:

$HCN(aq.)+H_2O\rightleftharoons H_3O^+(aq.)+CN^-(aq.)$

b) According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

For the given chemical equation:

$HCN$ is loosing a proton, thus it is considered as an acid and after losing a proton, it forms $CN^-$ which is a conjugate base.

And, $H_2O$ is gaining a proton, thus it is considered as a base and after gaining a proton, it forms $H_3O^+$ which is a conjugate acid.

c) Neutralization reaction is a reaction in which an acid reacts with base to produce salt and water.

$HCN(aq.)+NaOH(aq)\rightarrow NaCN(aq.)+H_2O(l)$

d) The chemical equation for dissociation of $NaCN$ in water.

$NaCN(aq)\rightarrow Na^+(aq.)+CN^-(aq)$

e) The chemical equation for the reaction of $NaCN$ and $HCI$

$NaCN(aq)+HCl(aq)\rightarrow NaCl(aq.)+HCN(aq)$

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3 years ago

What were the reslt of aurangzeb's religion policy ? what measures did he takes

soldier1979 [14.2K]

Answer: The religious fanaticism of Aurangzeb overshadowed his virtues. His reversal of Akbar's policy of religious toleration resulted in weakening the entire structure of the Mughal empire. It led to several conflicts and wars in different parts of the country.

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3 years ago

PLS HELP DECODE THIS<br><br> The element symbol for Potassium: (B2)

Alex777 [14]

Answer:

It the letter K

Explanation:

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3 years ago

What is the new pressure if a gas takes up 350.0 mL of space at 745.0 mmHg and is pushed into 340.0 mL of space?

dolphi86 [110]

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