Atomic connections are totally severed during the transition from liquid to gas. Since the connections must be entirely destroyed rather than only loosened as in the phase transition from solid to liquid, the phase change from liquid to gas needs more energy.
What is transition phase?When a liquid is heated to its boiling point, it undergoes a process known as boiling, in which a vapor is created.
When the liquid's vapor pressure equals the air pressure acting on it, the liquid transitions from a liquid phase to a gaseous phase.
Energy is required by the particles to repel one another. More particles have enough energy to exit the liquid as it becomes warmer.
In order for a liquid's molecules to evaporate, they need to be close to the surface, travelling in the right direction, and have enough kinetic energy to overcome the intermolecular forces present during the liquid phase.
Therefore, liquid particles at high pressure would need more energy to change to a gas.
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Please Help
Some living organisms are capable of both asexual and sexual reproduction. Explain how this can be an advantage.
Answer:
The correct answer is - they can create genetic diversity as well and reproduce without mate when necessary.
Explanation:
Sexual reproduction provides an organism with genetic diversity and variation by the process and it required two mates and a longer time to pollination and fertilization and is used in normal conditions.
In case of a threat, such organisms use asexual reproduction to increase their number as in asexual reproduction no need of mate, an organism can grow and increase on its own it provides to not to exitinct.
Do PV cells last for a long time and are efficient
PLZZ HELP!!!!!!! What is PH
What is the pH of an HCl solution if [H+] = 0.03?
A. 0.03
B. 1.5
C. 3.0
D. 3.5
Answer: B
Explanation:
1.5 :D
Li + H2O + LiOH + H2
How do I balance this?
Answer:
2Li + 2H2O → 2LiOH + H2
Explanation:
Lithium + Water = Lithium Hydroxide + Dihydrogen
A swallow sitting on a fence sings a song for anyone who will listen. Identify the energy transformation
Answer:
The answer is "From Chemical to Mechanical.".
Explanation:
In this question, chemical energy is an organic compound that includes contains energy from certain chains for the exergonic responses that happen when fuels emitters inside the form of heat throughout a chemical process, in which the skin converts the chemical energy in food into mechanical energy and heat.
The concentration of a potassium hydroxide solution is
84.0 g dm-3. Calculate the number of moles of potassium
hydroxide present in 300 cm3 of the solution.[K,39,H,1 0,16]
Answer:
k,39
Explanation:
Is the answer
What’s the correct answer?
Answer:
b
Explanation:
list a few reasons why the oxygen level decreases in case
Answer:
Blood oxygen level is the amount of oxygen circulating in the blood. Most of the oxygen is carried by red blood cells, which collect oxygen from the lungs and deliver it to all parts of the body.Blood oxygen level is the amount of oxygen circulating in the blood. Most of the oxygen is carried by red blood cells, which collect oxygen from the lungs and deliver it to all parts of the body.The body closely monitors blood oxygen levels to keep them within a specific range, so that there is enough oxygen for the needs of every cell in the body.Blood oxygen level is the amount of oxygen circulating in the blood. Most of the oxygen is carried by red blood cells, which collect oxygen from the lungs and deliver it to all parts of the body.The body closely monitors blood oxygen levels to keep them within a specific range, so that there is enough oxygen for the needs of every cell in the body.A person’s blood oxygen level is an indicator of how well the body distributes oxygen from the lungs to the cells, and it can be important for people’s healthExplanation:
"Oxygen fuels our living processes. It contracts our muscles, helps our cells to work, grow and regenerate, feeds our brains, calms our nerves, helps the heart to pump, cleanses the body of toxins, fights infection and boosts immunity," says Dr Jena, Director, Institute of Emergency Medicine, Mission Hospital & Research Center , Madurai.
Lungs:
Once air enters the nose or mouth, it gets humidified and reaches the oliveoli, tiny air sacs that help to pull in oxygen and transfer it into the blood stream and also to pull out the carbon dioxide and push it out of the lungs and back up to breathe out. destroys these oliveoli by thickening the walls so gas exchange becomes difficult.
Heart :
The left side of your heart receives oxygen-rich blood from your lungs and pumps it through your arteries to the rest of your body. The right side of your heart receives oxygen-poor blood from your veins and pumps it to your lungs, where it gets rid of the carbon dioxide and picks up oxygen. Inan increase in oxygen demand occurs because of compromised lungs and fear (that excites the body). This may lead to heart damage, especially if the arteries were already clogged.
this may help you hope so
use of sodium trioxocabonates iv
Answer:
Sodium hydrogen trioxocarbonate(IV) is also known as baking soda, and has the molecular formula NaHCO3. Industrial Preparation of NaHCO3. The salt is manufactured industrially by the solvay process by saturating a wet mush of Na2CO3 obtained from the solvay process with CO2. Na2CO3(aq) + H2O(l) + CO2(g) → 2NaHCO3(s)
Explanation:
Hope it helps
FOLLOW MY ACCOUNT PLS PLS
What is the molecular formula for this molecule? a
Answer:
In a molecular formula, it states the total number of atoms of each element in a molecule.
Explanation:
help me get it right and no links
Answer:
limited
Explanation:
have a good day :)
What is the standard cell notation of a galvanic cell made with zinc and gold?
A. Zn2+(aq) | Zn(s) || Au(s) | Au+(aq)
B. Au(s)| Aut(aq) || Zn2+(aq) | Zn(s)
C. Aut (aq)| Au(s) || Zn(s) | Zn2+(aq)
D. Zn(s) | Zn2+ (aq) || Aut(aq) | Au(s)
Answer:
D
Explanation:
3. How do we get mass from moles?
A. multiply by Avogadro's number
B. multiply by molar mass
C. divide by Avogadro's number
D. divide by molar mass
How many grams of strontium nitrate (Sr(NO3)2) contain 40 grams of oxygen atoms?
Answer:
88g of Sr(NO3)2 are present
Explanation:
To solve this question we must, as first, find the moles of oxygen. Based on the chemical formula of strontium nitrate, there are 6 atoms of oxygen per mole of strontium nitrate. Thus, we can find the moles of strontium nitrate and its mass as follows:
Moles Oxygen:
40g * (1mol / 16g) = 2.5 moles Oxygen
Moles Strontium nitrate:
2.5 moles Oxygen * (1mol Sr(NO3)2 / 6mol O) = 0.4167 moles Sr(NO3)2
Mass (Molar mass Sr(NO3)2: 211.63g/mol)
0.4167 moles Sr(NO3)2 * (211.63g / mol) =
88g of Sr(NO3)2 are presentWhich describes the titration graph when a strong acid is titrated by a weak base?
It begins at a low pH and has an equivalence point of 7.
It begins at a low pH and has an equivalence point less than 7.
It begins at a high pH and has an equivalence point of 7.
It begins at a high pH and has an equivalence point greater than 7.
Answer:
the answer is b edg 2021
Explanation:
it just is
What’s “the ring of fire” meaning ( no answers from goo gle please I really wanna understand this because it’s coming in my test and plsss short answers)
Answer:
"Ring of Fire" sounds ominous, the term refers to falling in love
Explanation:
Brainliest???
Chemical X has a mass of 5 grams, and chemical Y has a mass of 10 grams. If the two chemicals are mixed and a complete chemical reaction takes place, what is most likely the mass of the product?
A
5g
B
10g
C
15g
D
50g
Answer:
50
Explanation:
10 x 5 = 50
Question 1
A molecule contains carbon, hydrogen and oxygen. For every carbon atom there are
twice as many hydrogen atoms but the same number of oxygen atoms.
What is the formula of the molecule?
А
CH 0
B
C2H4O2
C
C,H,O2
D
C,H,O2
The required molecule is :
=》option B.) C2H4O2
it has 2 carbon atoms, 4 hydrogen atoms which it twice the number of carbon atoms and 2 oxygen atoms same as carbon.
Given the equation:
Zn + 2HCl → ZnCl2 + H2
How many moles of HCl would be required to
produce a total of 2 moles of H2?
Answer:
4 moles of HCl will be required to produce 2 moles of H2.
Explanation:
A balanced chemical equation gives the stoichiometric ration of moles of reactants required to produce a certain number of moles of products. The ratio of moles of reactants to moles of products is known as the mole ratio and is constant for a given chemical reaction.
In the given balanced equation of reaction shown below:
Zn + 2HCl → ZnCl2 + H2
The mole ratio of HCl and H2 is 2:1. This means that in this reaction between Zinc metal and hydrochoric acid to produc zinc chloride and hydrogen gas, every two moles of hydrochloric acid used in the reaction will result in the production of one mole of hydrogen gas.
Therefore for two moles of H2 to be obtained from the reaction, twice the number of moles of HCl is required.
Moles of HCl required = 2 × 2 moles = 4 moles of HCl.
Please help it’s my final
What is the oxidation number of Pt in K₂PtCl₆?
Answer:
the oxidation number of Pt in K₂PtCl₆ is 4.
K₂PtCl₆=0
2+x-6=0
x=4
The image above shows what happens when hydrochloric acid (HCl) and sodium hydroxide (NaOH) are mixed with water. Which statement below is true about both solutions?
A. Both solutions contain solutes that do not dissolve completely in water.
B. Both solutions are saturated because they contain the maximum concentration of a solute dissolved in the solvent.
C. Both solutions will conduct an electric current because they both contain ions that can carry a charge.
D. Both solutions are acidic because they both contain hydrogen.
When we add a strong acid or a strong base to water, the pH of the solution will dramatically change. Here both solutions will conduct an electric current because they both contain ions that can carry a charge. The correct option is C.
What is a solution?A solution is defined as the homogeneous mixture of two or more components in which the particle size is found to be smaller than 1 nm. The component which dissolves the other component is called the solvent and the component that is dissolved is called the solute.
When we add HCl to water, it results in the reaction HCl + H₂O → H₃O⁺ + Cl⁻. In other words the proton from the acid binds to the water molecules to form H₃O⁺ and thereby increases the concentration of H⁺.
Similarly when NaOH is added to water, it forms sodium ions (cations) and hydroxide ions (anions) which move freely in water.
Thus the correct option is C.
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2 C5H5 + Fe = Fe(C5H5)2
Mary is standing on a train moving east at 10 km per hour. Alicia is sitting on a train that passes in the opposite direction at 30 km per hour. From Mary's point of view, how fast is Alicia moving?
Help
help me get this right
Answer:I’m 100% it’s the second one
Explanation:
I have done it before and missed one but not this question
Can y’all help with question 17
Answer:
7. Option 2. Atom 1 and Atom 4
8. The same number of valence electron
Explanation:
7. Determination of which symbol represent an isotope.
Isotopes are atoms having the same atomic number but different mass number due to the difference in the neutron number.
From the question given above, the following were obtained:
Z => atomic number
A => mass number
Atom >>> Isotope >>>>> Z >>>> A
1 >>>>>>> ¹⁷₇E >>>>>>>> 7 >>>> 17
2 >>>>>>> ¹⁷₈E >>>>>>> 8 >>>> 17
3 >>>>>>> ¹⁸₆E >>>>>>> 6 >>>> 18
4 >>>>>>> ¹⁸₇E >>>>>>> 7 >>>> 18
From the table above, only atom 1 and 4 has the same atomic number. Hence, atom 1 and atom 4 are isotopes.
8. To know the correct answer to the question, we shall write the electronic configuration of magnesium and calcium. This can be obtained as follow:
Mg (12) => 1s² 2s²2p⁶ 3s²
Valence electron => 2
Ca (20) => 1s² 2s²2p⁶ 3s²3p⁶ 4s²
Valence electron => 2
We can see that magnesium and calcium both have the same valence electron. Hence, they will have similar chemical properties.
How many moles of carbon is 1.88 x 1025 carbon atoms?
Answer:
31.23 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
we have
[tex]n = \frac{1.88 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 31.229235...[/tex]
We have the final answer as
31.23 molesHope this helps you
This tool is used to measure
Answer:
C. volume
Explanation:
1. How many grams of NaOH are needed to react with two moles of H2SO4? 2NaOH + H2SO4 Na2SO4 + 2H20
Explanation:
Explanation:
Given the molecular weights:
M
r
N
a
O
H
=
40
g
m
o
l
M
r
N
a
2
S
O
4
=
142
g
m
o
l
The analogy of the moles will be held constant:
n
N
a
O
H
n
N
a
2
S
O
4
=
2
1
n
N
a
O
H
n
N
a
2
S
O
4
=
2
For each one, substitute:
n
=
m
M
r
Therefore:
n
N
a
O
H
n
N
a
2
S
O
4
=
2
m
N
a
O
H
M
r
N
a
O
H
m
N
a
2
S
O
4
M
r
N
a
2
S
O
4
=
2
200
40
x
142
=
2
200
⋅
142
40
x
=
2
200
⋅
142
=
2
⋅
40
x
x
=
200
⋅
142
2
⋅
40
=
100
⋅
142
40
=
10
⋅
142
4
=
1420
4
=
=
710
2
=
355
g
r
a
m
s
(or just use a calculator
How many grams of NaCl are in 2.0 Liters of a 3.0 M NaCl solution?
Answer:
350.64g
Explanation:
So first you must know that M is mol/L
Next solve the problem using dimensional analysis
2L NaCl (3 mol/L) = 6 mol NaCl
After you got the number of moles you should look at your periodic table to find the molar mass
I see that it's 58.44g/mol
Use dimensional analysis again!
6 mol (58.44g/mol) = 350.64g
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