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2 years ago

Analyze the diagram showing the changing states of matter. Drag the item from the item bank to its corresponding match.

Chemistry

1 answer:

iVinArrow [24]2 years ago

6 0

The correct matches for changes of state are:

1 or 3 : Arrow that shows particles getting closer together
gas: State of matter that would fill any container
liquid: State of matter with definite volume but NOT shape
2 or 4: Arrow that shows particles gaining energy
solid: State of matter with definite shape

<h3>What is change of state?</h3>

Change of state is the process whereby matter in one physical state is converted to matter in another state by the addition or removal of heat.

The process of change of state are:

Melting: solid to liquid due to addition of heat
Vaporization: liquid to gas due to addition of heat
Sublimation: solid to gas due to addition of heat
Freezing: liquid to solid due to removal of heat
Condensation: gas to liquid due to removal of heat
Deposition: gas to solid due to removal of heat

Considering the given diagram, the correct matches are:

1 or 3 : Arrow that shows particles getting closer together
gas: State of matter that would fill any container
liquid: State of matter with definite volume but NOT shape
2 or 4: Arrow that shows particles gaining energy
solid: State of matter with definite shape

In conclusion, change of state of matter occurs due to heat changes.

Learn more about change of state at: brainly.com/question/1078692

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<u>Explanation:</u>

To calculate the moles of KOH, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}\text{Volume of solution (in L)}}$

We are given:

Volume of solution = 43.81 mL = 0.04381 L (Conversion factor: 1L = 1000 mL)

Molarity of the solution = 0.0969 moles/ L

Putting values in above equation, we get:

$0.0969mol/L=\frac{\text{Moles of KOH}}{0.04381}\\\\\text{Moles of KOH}=4.24\times 10^{-3}mol$

The chemical reaction of weak monoprotic acid and KOH follows the equation:

$HA+KOH\rightarrow KA+H_2O$

By Stoichiometry of the reaction:

1 mole of KOH reacts with 1 mole of weak monoprotic acid.

So, $4.24\times 10^{-3}mol$ of KOH will react with = $\frac{1}{1}\times 4.24\times 10^{-3}=4.24\times 10^{-3}mol$ of weak monoprotic acid.

Hence, the number of moles of weak acid is $4.24\times 10^{-3}$ moles.

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3 years ago

How many grams of O₂ are required to react completely with 14.6 g of Na to form sodium oxide, Na₂O?

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The balanced chemical reaction is :

$O_2 + 4Na \ -> \ 2Na_2O$

Number of moles of Na, $n = \dfrac{14.6}{23} = 0.635 \ mol$ .

Now, from balance chemical reaction we can see that 1 mole of oxygen reacts with 4 moles of sodium.

So, number of moles of oxygen are :

$n = \dfrac{0.635}{4}\ mole$

So, amount of oxygen required is :

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3 years ago

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Answer:

The gas obeys Boyle’s law and the value of $k_i\&k_f$ both are equal to 40.0 atm L.

Explanation:

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Initial pressure of the gas = $P_1=4.0 atm$

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Final pressure of the gas = $P_2=8.0 atm$

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The equation given by this law is:

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The gas in the cylinder is obeying Boyle's law.

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