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barxatty [35]
3 years ago
14

Do all liquids evaporate at the same rate?

Chemistry
1 answer:
zhuklara [117]3 years ago
7 0
<span>Well Not all liquids evaporate at exactly the same rate. The type of liquid and the makeup of the liquid changes the liquid's rate of evaporation.....

</span>
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Whoever answers correctly I’ll give you a Brainly
Andre45 [30]

Answer:

answer is B

Explanation:

3 0
3 years ago
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Explain how density differs from volume
oee [108]
Volume is the amount of space the matter takes up, density is mass OF the volume

4 0
3 years ago
Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide. Ca) + H2O --&gt; Ca(OH)2 In a particular
mars1129 [50]

Answer:

Percent yield = 92.5%

Explanation:

The question asks for the percent yield which can be defined as:

\frac{actual yield}{theoretical yield} .100

Where the actual yield is <em>how much product was obtained</em>, in this case 6.11 g of Ca(OH)₂, and the theoretical yield is <em>how much product could be obtained with the given reactants theoretically</em>, that is if the reaction would work perfectly. So we need to calculate first the theoretical yield.

1. First lets write the chemical equation reaction correctly and check that it is balanced:

CaO + H₂O → Ca(OH)₂

2. Calculate the amount of product Ca(OH)₂ that can be obtained with the given reactants (theoretical yield), which are 5.00g of CaO and excess of water. So the amount of CaO will determined how much Ca(OH)₂ we can obtained.

For this we'll use the molar ratio between CaO and Ca(OH)₂ which we see it is 1:1. For every mol of CaO we'll obtain a mol of Ca(OH)₂. So lets convert the 5.00 g of CaO to moles:

 Molar Mass of CaO: 40.078 + 15.999 = 56.077 g/mol

 moles of CaO = 5.00 g / 56.077 g/mol = 0.08916 moles

As we said before from the molar ratio moles of Ca(OH)₂ = moles of CaO

So the moles of Ca(OH)₂ that can be obtained are 56.077 g/mol

We need to convert this value to grams:

 Molar Mass of Ca(OH)₂ = 40.078 + (15.999 + 1.008)*2 = 74.092 g/mol

Theoretical yield of Ca(OH)₂ = 0.08916 moles x 74.092 g/mol = 6.606 g

3. Calculate the percent yield:

\frac{actual yield}{theoretical yield} .100

Percent yield = (6.11 g / 6.606g) x 100 = 92.5 %

5 0
3 years ago
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Which statement describes the atoms in gas???
marissa [1.9K]

Answer:

Option-D : They move freely in all directions.

Explanation:

                  The physical properties of gases are well explained by Kinetic Molecular Theory. The key postulates of this theory are;

                             1) Composition: Gases are made up of small particles called molecules. The size of these molecules is very small as compared to the distance between molecules, therefore the actual volume of molecules is taken negligible as compared to volume occupied by them.

                            2) Intermolecular Forces: All the gas molecules present in a container behaves independently because they have no force of interactions between them Hence, the attractive forces are taken negligible or too little.  

                             3) Energies: Gas molecules have greater kinetic energy as compared to solids and liquids. Hence, The gas molecules move randomly. They collide with each other and with the walls of the container which causes pressure.

Conclusion:

                 Therefore, due to large spaces, no interactions, small sizes and high energies the gas particles move freely and there position is not stationary.

8 0
1 year ago
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Determine the pH of a 0.0500 M solution of potassium hydroxide (KOH).
olasank [31]
The pOH is -log (,05) so 1.30.  14-1.30 = 12.7 is the pH
5 0
3 years ago
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