A severe systemic reaction to an allergen causing serious symptoms that develop very quickly is known as.

Answers

Answer 1

Answer: Anaphylaxis

Explanation:

I have a nut allergy, and this has happened to me once. The doctors also told me a lot about anaphylaxis, and I like to learn about myself.

I hope this helps!! :)


Related Questions

Why don’t all ionic compounds dissolve in water?

Answers

Answer:

This is because the ionic forces in those molecules are very high, which creates high lattice energy

Explanation:

hope it helps you and give me a brainliest

some ionic compounds have high lattice energy thus stronger ionic bonds. this causes more energy to be required to break the ionic bonds so energy released from forming ion dipole interaction is insufficient to overcome the energy absorbed to break the ionic bonds thus insoluble

During photosynthesis, how many moles of water (H₂O) are needed to produce 150 grams of glucose
(C6H12O6)?

A. 2 moles
B. 3 moles
C. 4 moles
D. 5 moles

Answers

During photosynthesis, 5 moles of water are needed to produce 150 grams of glucose. The correct option is D.

What is photosynthesis?

It is the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water.

Step 1: Write the balanced equation for photosynthesis.

6 CO₂ + 6 H₂O ⇒ C₆H₁₂O₆ + 6 O₂

Step 2: Convert 150 g of C₆H₁₂O₆ to moles.

The molar mass of C₆H₁₂O₆ is 180.16 g/mol.

150 g × 1 mol/180.16 g = 0.833 mol

Step 3: Calculate the moles of water required to form 0.833 moles of C₆H₁₂O₆

The molar ratio of H₂O to C₆H₁₂O₆ is 6:1.

0.833 mol C₆H₁₂O₆ × 6 mol H₂O/1 mol C₆H₁₂O₆ = 5.00 mol H₂O

During photosynthesis, 5 moles of water are needed to produce 150 grams of glucose. The correct option is D.

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What molecule is butane

Answers

Butane is a gaseous molecule which is part of the organic compounds called  hydrocarbon,

What kind of molecule is butane?

Butane is a gaseous molecule which is generally called a hydrocarbon.

Hydrocarbons are composed of only carbon and hydrogen. They are of organic origin.

Butane is a low molecular weight hydrocarbon which is used as a fuel.

In conclusion, butane is a gaseous hydrocarbon,

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solve me these one's

fast pls

II. Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as: (a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A). (b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A). (c) Assertion (A) is true but reason (R) is false. (d) Assertion (A) is false but reason (R) is true.







Q.6. Assertion: When a beam of light is passed through a colloidal solution placed in a dark place the path of the beam becomes visible.
Reason: Light gets scattered by the colloidal particles.

Q.7. Assertion: A solution of table salt in a glass of water is homogeneous.
Reason: A solution having different composition throughout is homogeneous.

Q.8. Assertion: True solution exhibits Tyndall effect.
Reason: Particles are very large in size

Answers

Colloidal solution has large size particles hence it is able to scatter light.

What is a colloidal solution?

A colloidal solution is a solution that is composed of particles that are larger in size than the particles that compose a true solution.

For question 6;

Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A)

For question 7;

Assertion (A) is true but reason (R) is false.

For question 8;

Assertion (A) is false but reason (R) is true.

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What is the percent composition of oxygen in SO₂?

Answers

Answer: 50%

Explanation:

To find the percent composition of oxygen in SO₂, we need to find out the molar masses of both elements and add them.

First, figure out how many atoms are in each element of this compound. Then figure out the molar mass by multiplying it by the molar mass you'd see on the periodic table.

[tex]1atomS*32.06g=32.06g/molS\\2atomO*15.999g=31.998g/molO_{2}[/tex]

Now that we have that information, we must add up the numbers to get the molar mass of SO₂.

[tex]32.06g/molS+31.998g/molO_{2} =64.058g/molSO_{2}[/tex]

Now we have the molar mass of SO₂. To find the percent composition of oxygen in SO₂, we must divide the molar mass of O₂ by that of SO₂, then multiply that by 100.

[tex]\frac{31.998g/molO_{2} }{64.058g/molSO_{2} } *100=49.95; 50[/tex]

Given this, the percent composition of oxygen in SO₂ is 50%.

I hope this helps! Pls mark brainliest!! :)

What is the concentration if 0.25 mil is dissolved in 500cm cubed of solution

Answers

Answer:

0.5 mol/dm3

Explanation:

e.g. g/dm3, g/cm3 and mol/dm3

= g dm-3, g cm-3 and mol dm-3

How does the selectivity filter of an ion channel prevent the passage of ions that are smaller or bigger than the ion for which it selects

Answers

The selectivity filter of an ion channel prevent the passage of ions that are smaller or bigger through forming the most constricted part of the conduction pathway.

What is an Ion?

This is referred to a particle which is charged such as being positive, negative etc.

The selectivity filter being part of the constricted parts will ensure that the appropriate ions are bonded and moved into the cell.

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How many electrons do silicon and oxygen atoms need to form octets?

Answers

Answer:

We convert two lone pairs of electrons from each oxygen atom to a covalent bond, as seen in the SiO2 Lewis dot structure. As a result, the valence shells of both silicon and oxygen have eight electrons.

Write the balanced molecular equation for the neutralization reaction between HI and Ba(OH)2 in aqueous solution. Include physical states.
molecular equation

Answers

neutralization reaction = acid+base = salt + water

molecular equation = balanced equation

2HI(aq) + Ba(OH)₂(aq) ⇒ BaI₂(aq) + 2H₂O(l)

What is the equilibrium constant for the reaction?

Answers

Answer: C. 20

Explanation: One equation for the equilibrium constant is [tex]\frac{[Products]}{[Reactants]}[/tex]. The products are typically on the left side and the reactants on the right.

Given this and the values of each, we can easily plug this in. However, we must multiply the products instead of adding them.

[tex]\frac{0.69M*0.98M}{0.034M} =19.888, or 20M[/tex]

19.888 can be easily rounded to 20, meaning that C is the best answer.

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how many grams are in 4.63 ×1024 molecules of CCl4​

Answers

Answer:

m =1,182.8g

Explanation:

there you go

1. How many grams of sodium chloride is produced when 3.4 g of sodium reacts with 8.9 g of chlorine in
this balanced equation?
2Na+ Cl₂ → 2NaCl

Answers

The Answer to the question is 14 grams approximately.

Atomic mass of Na = 23 u

Given mass of Na = 3.4 gm

Moles of Na = given mass of Na / molar mass of Na

Moles of Na = 3.4 / 23 moles = 0.15 moles approximately

So, 0.15 moles of Na approximately

Molar mass of Cl₂ = 35.45 × 2 = 70.9  u

Given mass of Cl₂ = 8.9 gm

Moles of Cl₂ = given mass of Cl₂ / molar mass of Cl₂

Moles of Cl₂ = 8.9 / 70.9 moles = 0.12 moles approximately

So, 0.12 moles of Cl₂ approximately

Balanced chemical equation

2Na   +     Cl₂ → 2NaCl

Ratio of Moles to Stoichiometric coefficients

0.15/2     0.12/1  

0.075  <  0.12

So, as ratio of Na is less then it will be our Limiting reagent.

Which means that Cl₂ will consume complete in the reaction.

It is clear from the reaction that 1 moles of Cl₂ are making 2 mole of NaCl

1 moles of Cl₂ → 2 mole of NaCl

0.12 moles of Cl₂ → 2 × 0.12 mole of NaCl

0.12 moles of Cl₂ → 0.24 mole of NaCl

So, 0.12 moles of Cl₂ will make 0.24 mole of NaCl

0.24 mole NaCl = mass formed NaCl / molar mass of NaCl

mass formed NaCl = 0.24 × molar mass of NaCl

mass formed NaCl = 0.24 × 58.44

mass formed NaCl = 0.24 × 58.44

mass formed NaCl = 14 grams    (approximately)

14 grams of NaCl will be formed.

So, approximately 14 grams NaCl is formed from 3.4 grams of Na and 8.9 grams of Cl.

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10. Using the below valency chart, write the chemical formula for aluminum oxide and
aluminum chloride

Answers

The chemical formula of aluminum chloride is AlCl₃ and the  chemical formula of aluminum oxide is Al₂O₃.

Aluminum chloride

The chemical formula of aluminum chloride is written as;

Al³⁺  + Cl⁻   → AlCl₃

Aluminum oxide

The chemical formula of aluminum oxide is written as;

Al³⁺  + O²⁻   → Al₂O₃

Thus, the chemical formula of aluminum chloride is AlCl₃ and the  chemical formula of aluminum oxide is Al₂O₃.

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Answer:

gg mate

Explanation:

How many atoms of germanium
are present in a sample
containing 1.65 moles Ge?

Answers

Answer:

9.9363 x 10^23  atoms

Explanation:

1.65   x   Avagadro's Number

1.65 * 6.022 x 10^23 =

During photosynthesis, how many grams of oxygen gas (O₂) are produced from 55 grams of carbon
dioxide gas (CO₂)?

A. 32 grams 02
B. 40 grams 02
C. 44 grams 0₂
D. 55 grams 0₂

Answers

[tex]6h2o + 6co2 = 6o2 + c6h12o6[/tex]

number of mol CO2=number of mol of O2

[tex]n = n \\ \frac{ mass}{molar \: mass} = \frac{mass}{molar \: mass} [/tex]

[tex] \frac{55}{44} = \frac{m}{32} \\ m = \frac{55 \times 32}{44} = 40 \: grams[/tex]

Photosynthesis reactions are the process that occurs in the plants to yield oxygen from food. In the process, 55 gm of carbon dioxide produces 40 gm of oxygen. Thus, option B is correct.

What is photosynthesis?

Photosynthesis is a metabolic reaction that takes place in the plant cell where the sun energy converts the water and carbon dioxide into sugar (glucose) and oxygen.

The photosynthetic reaction is given as,

6H₂O + 6 CO₂ → C₃H₁₂O₆ + 6O₂

In the above reaction, there are 6 moles of carbon dioxide needed to produce 6 moles of oxygen. Hence, moles of carbon dioxide consumed = moles of oxygen produced.

Mass from moles is calculated as,

Moles = mass ÷ molar mass

Equating moles of both CO₂ and O₂,

mass ÷ molar mass = mass ÷ molar mass

55 ÷ 44 = m ÷ 32

m = 55 × 32 ÷ 44

= 40 gm

Therefore, 40 gm of oxygen is produced from 6 moles of carbon dioxide.

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A solution containing 1 mol of a strong electrolyte will have a(n) _____ effect on the colligative properties of the solution than 1 mol of a nonelectrolyte. A strong electrolyte will dissociate or ionize in aqueous solution, and therefore the total number of dissolved solute particles is _____ for 1 mol of a strong electrolyte than for 1 mol of a nonelectrolyte solute.

Answers

A solution containing 1 mol of a strong electrolyte will have a greater effect on the colligative properties of the solution than 1 mol of a nonelectrolyte. A strong electrolyte will dissociate or ionize in an aqueous solution, and therefore the total number of dissolved solute particles is greater for 1 mol of a strong electrolyte than for 1 mol of a nonelectrolyte solute.

How do electrolytes work?

An electrolyte is a material that separates into charged ions when it is in contact with water. Cations are positively charged ions. Anions are ions that are negatively charged. A substance that may conduct an electric current when melted or dissolved in water is known as an electrolyte.

Types of electrolytes:-

A substance is referred to as a strong electrolyte if the physical or chemical process that produces the ions is virtually 100% effective (all of the dissolved molecules give ions). Weak electrolytes are those in which only a very small portion of the dissolved substance goes through the ion-producing process.

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calculate no. of molecules in 1120 ml CH⁴ at NTP​

Answers

Answer:

0.3011 X10²³

Explanation:

hope this helps u

IN NEED OF QUICK HELP Name both the reactant and product and then draw the reactant and product


Please explain

thanks

Answers

The reactant in this reaction is 2-fluoro-5-propyl - heptane while the product is  2-hydroxy-5-propyl - heptane.

What is a substitution reaction?

We define a substitution reaction as one in which a given moiety is replaced by another. This is an example of a substitution reaction.

The name of the reactant in this reaction is 2-fluoro-5-propyl - heptane while the product is  2-hydroxy-5-propyl - heptane.

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When electrons in an atom transition from a lower energy state to a higher energy state __________ .

Answers

When electrons in an atom transition from a lower energy state to a higher energy state it has to absorb some energy in order to transition to the higher energy state.

When properly stimulated, the electrons in these materials move from lower energy levels to higher energy levels and occupy different orbits. Then, at some point, these high-energy electrons emit "extra" energy in the form of photons and return to their original energy levels.

Electrons jump to higher energy levels when excited by external energy gains such as B. Large heating, the presence of an electric field, or collision with another electron.

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A solution of NaOH has concentration of 1.2M then mass of NaOH in g/dm3 is

Answers

Answer:

A solution of NaOH has concentration 1.2M. Calculate the mass of NaOH in g/dm3 in this solution. = 1.2x 40x 1 = 48 g 3.

The mass of NaOH in the solution having concentration of 1.2 M is 48.00 grams per decimeter cubed (g/dm³).

Concentration refers to the amount of a solute dissolved in a given amount of solvent or solution. It is a measure of how much solute is present in a specific volume or mass of the solution.

Concentration can be expressed in various units, such as molarity (moles of solute per liter of solution), mass percent (mass of solute per 100 grams of solution), parts per million (ppm), and others.

Given:

Concentration of NaOH solution = 1.2 M

The molar mass of NaOH (sodium hydroxide) is:

Na: 22.99 g/mol

O: 16.00 g/mol

H: 1.01 g/mol

Total molar mass of NaOH = 22.99 + 16.00 + 1.01

= 40.00 g/mol

1 mole of NaOH = 40.00 g

1.2 moles of NaOH = 1.2 moles × 40.00 g/mole

= 48.00 g/L

1 L = 1 dm³

So, 48.00 g/L = 48.00 g/dm³

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Which statement about gases is true?
A) They are made up of particles that always move very slowly.
B) They are made up of particles that travel in a curved path when in motion.
C) They are made up of hard spheres that vibrate quickly in stationary positions.
D) They are made up of hard spheres that are in random motion.

Answers

Answer:

B) They are made up of particles that travel in a curved path when in motion.

Explanation:

We know that gas, being a state of matter, is made up of particles. John Dalton's solid-sphere model was proven to be incorrect by Ernest Rutherford's gold foil experiment.

These particles do NOT always move very slowly. There are multiple different factors that affect the speed of the particles such as temperature or concentration.

1. What is the pH of a solution with a [H3O+] concentration of 4.32 x 10-2 M?

2. What is the pH of a solution with a [H3O+] concentration of 3.4 x 10-11 M?

3. What is the concentration [H3O+] of a solution with a pH of 13.2?

Answers

1. The pH of the solution is 1.36

2. The pH of the solution is 10.47

3. the concentration of [H₃O⁺] in the solution is 6.3×10⁻¹⁴ M

What is pH ?

This is simply a measure of the acidity / alkalinity of a solution.

The pH measures the hydrogen ion (hydronium ion) concentration while the poH measures the hydroxide ion concentration. It is expressed mathematically as

pH = –Log H₃O⁺

1. How to determine the pH[H₃O⁺] = 4.32×10⁻² MpH = ?

pH = –Log H₃O⁺

pH = –Log 4.32×10⁻²

pH = 1.36

2. How to determine the pH[H₃O⁺] = 3.4×10⁻¹¹ MpH = ?

pH = –Log H₃O⁺

pH = –Log 3.4×10⁻¹¹

pH = 10.47

3. How to determine the concentration of [H₃O⁺]pH = 13.2[H₃O⁺] = ?

pH = –Log H₃O⁺

13.2 = –Log H₃O⁺

Multiply through by -1

-13.2 = Log H₃O⁺

Take the anti-log of -13.2

H₃O⁺ = anti-log (-13.2)

H₃O⁺ = 6.3×10⁻¹⁴ M

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1. A weather balloon has a capacity of 10 000 L at 100 kPa and 20.00°C. Cesium metal is
reacted with water to fill the balloon with hydrogen gas. How many moles of H₂ must be
generated to fill it?

Answers

The number of moles of H₂ that must be generated to fill it is 0.41 mole.

Number of moles of hydrogen gas

Apply ideal gas law;

PV = nRT

n = PV/RT

where;

P is pressureV is volumeR is ideal gas constantT is temperature = 20 °C = 293 K

n = (10 x 100)/(8.314 x 293)

n = 0.41 mole

Thus, the number of moles of H₂ that must be generated to fill it is 0.41 mole.

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rather than being oxidized for energy, sugars are connected by glycosidic linkages to make a capsule. which process does this describe

Answers

Rather than being oxidized for energy, sugars are connected by glycosidic linkages to make a capsule. This is catabolism process.

What is Glycosidic Linkage ?

It is a type of linkage in which covalent bond that joins a carbohydrate molecules to another group is called glycosidic bond or glycosidic linkage.

Example: Hemiacetal and hemiketal.

What is catabolism ?

Catabolism is the part of metabolic process which uses energy to break down into smaller units.

Thus from the above conclusion we can say that Rather than being oxidized for energy, sugars are connected by glycosidic linkages to make a capsule. This is catabolism process.

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Determine the ground-state electron configuration for each of the following elements: A. chlorine ______________________________________________________________________ B. cesium ______________________________________________________________________ C. vanadium______________________________________________________________________ D. rhenium______________________________________________________________________ 2. Predict the number of valence electrons present in each of the following atoms (include the outermost d- electrons): A. Sn ___________________________ B. La___________________________ C. Mn__________________________ D. Zn __________________________ 3. Determine the ground-state electron configuration for each of the following ions:

Answers

In ground-state electron configuration, the principal quantum number (n), the orbital (s, p, d, or f), and the total number of electrons are used to represent electron configurations.

Case 1 Ground-state electron configuration of elements.

A) Chlorine: 1s²2s²2[tex]p^{6}[/tex]3s²3[tex]p^{5}[/tex]

B) Cesium: 1s² 2s²2p⁶ 3s²3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 6s¹

C) Vanadium: 1s²2s²2p⁶3s²3p⁶3d³4s²

D) Rhenium: 1s² 2s² 2p⁶ 3s² 3p⁶3d¹⁰ 4s²4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d⁵ 6s²

Case 2 : Number of valence electron in atoms

A) Sn -Tin - Four valence electrons

B) La - Lanthanum - Three valence electrons

C) Mn - Manganese - Seven valence electrons

D) Zn- Zinc - Two valence electrons

Case 3 Ground-state electronic configuration of ions

A) Co⁺³ : 1s² 2s² 2p⁶ 3s² 3p⁶4s¹3d⁵

B) Mo⁺² : 1s² 2s² 2p⁶3s²3p⁶ 4s² 3d¹⁰ 4p⁶5s² 4d²

C) Ra⁺² : 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶

D) I⁻ : 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶

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structure and bonding t​

Answers

Answer:

boring it

Explanation:

because boring is life style

Although oxygen does not participate directly in the citric acid cycle, the cycle operates only when O2 is present. Why

Answers

Answer:

Explanation:

Sounds like oxygen acts as a 'catalyst'

Consider the following reaction:
3 Br2 + 6 OH¹-5 Br¹ + BrO3¹ + 3 H₂O
If 4.68 moles of Br2 are reacted with 8.12 moles of OH¹, how many moles of Br
can be formed? (Report your answer to two places past the decimal point.
Moodle is looking for a number only, no units.)

Answers

Answer:

Explanation:

I'm assume that 3 Br2 + 6 OH¹-5 Br¹ + BrO3¹ + 3 H₂O is meant to read:

3 Br2 + 6 OH^-1    =   5 Br^-¹ + BrO3^-¹ + 3 H₂O

The balanced equation tells us that 3 moles of Br2 will react with 6 moles of OH^-1 to produce 5 moles of Br^-1.

The first step is to determine whether the Br2 or OH^-1 are limiting reagents.  That is, is there enough of each to complete the reaction, with none left over.

We need 3 moles of Br2 for every 6 moles of OH^-1, a molar ratio of 1/2 (Br2/OH).

We are given 4.68 moles of Br2 and 8.12 moles of OH^-1.  That is a ratio of 4.68/8.12 or 0.5764.  This is higher than the ratio of 1/2 or 0.5 that is required.  That means we have more than enough Br2.  The limiting reagent is the OH^-1.  Once it is consumed, the reaction stops and we are left with some unreacted Br2.

So we need the molar ratio of the OH^-1 to the Br from the balanced equation:  We see that 6 moles of OH^-1 are required to produce 5 moles of Br, a 6/5 molar ratio.

Therefore, we may assume all 8.12 moles of the limiting reagent, OH^-1, will be consumed to produce *6/5) that amount of Br.

(8.12 moles OH^-1)*((6 moles Br)/(5 moles OH^-1)) = 9.75 moles of Br.

For curiosity's sake, we can determine the amount of unreacted Br2.  8.12 moles of OH^-1 would require (8.12 moles OH)*(1/2) = 4.06 moles of Br2.

4.68 moles starting Br2

4.06 moles consumed

0.62 moles remaining Br2

When an electr ic cur rent is passed through water , two colou r less gases are produced. When hydrogen gas makes a po pping sound in the presence of a blazing splint, water is produced. Explain how each of these reactions demonst rates that water is a comp ound, not an element.

Answers

The lysis reaction with the formation of two different gases, and the synthesis reaction with the reaction of hydrogen and oxygen support that water is a compound and not an element.

What is electrolysis?

The electrolysis is the analytical process for the separation or the deposition of the element in the presence of the electric field.

The passing of electric current through water results in the release of two types of gases. Thus, it can be said that water lysis or breakdown forms the release of two elements hydrogen and oxygen supporting the fact that water is a compound and not an element.

The production of water is found to be formed with the reaction of hydrogen with oxygen. Thus it supports that water is a compound and, not an element.

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How much heat is released when 25.0 grams of liquid copper at its freezing point of 1,085°c changes to solid? the latent heat of fusion of copper is 205.0 j/g. –27,130 j –5,130 j 5,130 j 27,130 j

Answers

Amount of heat released:

Heat is released when 25.0 gm of liquid copper at its freezing point of 1,085°C changes to solid is -5125 J

Given:

Mass of liquid copper, m= 25 gm

Latent heat of fusion of copper, L = 205.0 J/g

The amount of heat needed to change one gram of a substance from solid to liquid is known as the latent heat of fusion.

However, in this instance, it is necessary to determine the quantity of heat emitted when liquid copper solidifies.

So, L = -205.0 J/g

Calculation:

We may use the unitary approach to calculate the heat released when 25.0 grams of liquid copper solidify at 1,085°C, which is its freezing point.

So,

Q = L x m

Q = -205 J/g x 25 g

Q = -5125 J

So, the correct answer is b) -5,130 J, which is much nearest to -5125 J as we have calculated above.

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Answer:

-5,130 J

Explanation:

I got 100% on the quiz edge 2022

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