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Aleonysh [2.5K]
3 years ago
7

How could you interpret the events taking place on a molecular level in the images seen here? A) Kinetic energy decreases from l

eft to right. The fourth state, plasma, has the most kinetic energy and the atoms disassociate. B) Heat energy is continuously added at each step. As energy is added, the molecular motion/kinetic energy increases, and matter changes state. In the last state, plasma, enough energy has been added to cause the atoms to disassociate into ions. C) At each step, the state of matter changes. At each step, the molecular motion of the atoms increases because there is a decrease in pressure. During the final step, there is so little pressure that the atoms separate into protons and electrons. D) Matter changes state when there is a change in temperature. In each step, the temperature decreases causing a change in state. At the last state, plasma, the temperature is so lowh that the atoms cannot stay together and they disassociate into ions.
Chemistry
2 answers:
MaRussiya [10]3 years ago
5 0

i believe the answer is, b. heat energy is continuously added at each step. As energy is added, the molecular motion/kinetic energy increases, and matter changes state. In the last state, plasma, enough energy has been added to cause the atoms to disassociate into ions. 

hope this is right! :33

nexus9112 [7]3 years ago
3 0

i think it is B too i hope this helps!!!

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The sulfur content of an ore is determined gravimetrically by reacting the ore with concentrated nitric acid and potassium chlor
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Answer:

13.92 %

Explanation:

Mass of BaSO_4 = 12.5221 g

Molar mass of BaSO_4 = 233.43 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{12.5221\ g}{233.43\ g/mol}

Moles of BaSO_4 = 0.0536 moles

According to the given reaction,

Ba^{2+}_{(aq)}+SO_4^{2-}_{(aq)}\rightarrow BaSO_4_{(s)}

1 mole of BaSO_4 is formed from 1 mole of SO_4^{2-}

Thus,

0.0536 moles of BaSO_4 is formed from 0.0536 moles of SO_4^{2-}

Moles of SO_4^{2-} = 0.0536 moles

Moles of sulfur in 1 mole SO_4^{2-} = 1 mole

Moles of sulfur in 0.0536 mole SO_4^{2-} = 0.0536 mole

Molar mass of sulfur = 32.065 g/mol

Mass = Moles * Molar mass = 0.0536 * 32.065 g = 1.7187 g

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Mass % = \frac{Mass\ of\ Sulfur}{Mass_{ore}}\times 100 = \frac{1.7187}{12.3430}\times 100 = 13.92 %

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3 years ago
When HCl is added to water, the [H3O+] = 0.6 M. What is the [OH-]?
makkiz [27]

Answer:

The answer is

<h2>[OH-] = 1.66 × 10^-14 M</h2>

Explanation:

To find the [OH-] we must first find the pH and the pOH of the solution

That's

pH + pOH = 14

pOH = 14 - pH

To find the pH we use the formula

pH = -log [H3O+]

From the question

[H3O+] = 0.6 M

pH = - log 0.6

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pOH = 14 - 0.22

pOH = 13.78

We can now find the [OH -] in the solution using the formula

pOH = - log [OH-]

13.78 = - log [OH-]

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We have the final answer as

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