How is energy transformed
In cooking in fire

Answer

Explanation

The given balanced half-reaction for an acidic solution:

What to find:

Tha balanced half-reaction for a basic solution.

Step-by-step-solution:

To balance the half-reaction for a basic solution;

1. Add OH⁻ ions to BOTH SIDES to neutralize any H⁺

2. Combine H+ and OH- to make H2O.

3. Simplify by canceling out excess H2O

4. Balance the charges by adding e-

A process in which a large nucleus splits into two or more parts is called nuclear fission. That is option B

A nuclear fission is the process by which the unstable nucleus of heavy atoms splits into two or more smaller nuclei which are usually called the fission products.

Example of elements that can undergo nuclear fission reaction include the following:

Nuclear fusion is the combination of two or more lighter nuclei to form a single heavy nucleus with the release of energy. This is the direct opposite of a nuclear fission reaction.

Therefore, a process in which a large nucleus splits into two or more parts is called nuclear fission.

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Answer:

Explanation:

As the redeposited minerals build up after countless water drops, a stalactite is formed. If the water that drops to the floor of the cave still has some dissolved calcite in it, it can deposit more dissolved calcite there, forming a stalagmite.

Answer:

The answer will be "B"

Explanation:

It is B, because as we can see in the problem, it shows that there are three hydrogen gas, which is H₂. So, it shows that the ratio of Hydrogen gas to Ammonia is 3:2. In the answer, it says for every 3 mol of H₂ 2 moles of ammonia is produce. Therefore, B is correct.

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Yes, a precipitate will form if you mix together 100 mL of 0.010 m calcium chloride with 100 mL of 1.0 x 10-5 m solution of potassium carbonate.

This is because the Ksp (solubility product constant) for calcium carbonate is 3.0 x 10-9. This means that when the concentrations of calcium and carbonate ions become too high, they will no longer be soluble and a precipitate will form. To understand this better, consider the following reaction:

CaCl2 (aq) + CO3 (aq) --> CaCO3 (s) + 2Cl- (aq).

This equation shows that calcium ions (Ca2+) from the calcium chloride solution will react with carbonate ions (CO3-) from the potassium carbonate solution to form solid calcium carbonate (CaCO3) and chloride ions (Cl-). When the concentrations of calcium and carbonate ions in the solution become too high, a precipitate will form as calcium carbonate.

The Ksp for calcium carbonate is a measure of how much calcium and carbonate ions can be present in the solution before a precipitate forms. This means that if the concentrations of the calcium and carbonate ions become greater than 3.0 x 10-9 molar, a precipitate will form. The concentrations of the calcium and carbonate ions in the given solutions are 0.010 m and 1.0 x 10-5 m respectively, both of which are greater than the Ksp of calcium carbonate and hence a precipitate will form.

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Answer: 0.018 recurring?

Explanation:

moles = mass/mr

H20 = 2 + 16 = 18

0.340/18 = 0.018

1535.1 degrees Celsius or 5000 degrees Fahrenheit

Answer:

A. 21 J

Explanation:

Your temperature change is 10 degrees Celsius, or 10 Kelvin, it makes no difference either way.

Cp = 2.06 J/g•K

Multiply by the temperature change to just get J/g

2.06 J/g•K • 10 K = 20.6 J/g ≈ 21 J/g

21 J is the energy change per gram of ice when an iceberg composed of pure water, cp = 2.06 J/(g·K) which is heated from 25°C to 15°C. So, the correct option is A.

Heat is defined as the energy that is transferred from one body to another as a result of a difference in temperature, when two bodies at different temperatures are brought together, the energy transferred is that of the hotter body which flows towards the colder body.

In this case, according to the equation for the calculation of the heat during a heating process

\(Q= mC (T_f- T_i)\)

It is possible to calculate mass per gram of ice by dividing both sides by removing m from the equation, we plug in the given specific heat and final and initial temperatures to get:

\(Q= 2.06 \frac{J}{g degree C} [-15 Degree C- (-25 Degree C]\)

\(Q= 20.6\frac{J}{g}\) which is equals to 21° C

21 J is the energy change per gram of ice when an iceberg composed of pure water, cp = 2.06 J/(g·K) which is heated from 25°C to 15°C.

Therefore, the correct option is A.

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Answer:

Other:Si and Ge

Explanation:

The reaction you have written is a classic example of the hydration of an alkyne. The HgSO4 serves as a catalyst for the reaction. Here is the balanced chemical equation for the reaction:

Asymmetrical alkyne + H2O + H2SO4 + HgSO4 → Ketone

The product of this reaction is a ketone. The exact ketone produced will depend on the structure of the alkyne used.

The mechanism for this reaction involves the addition of water to the triple bond of the alkyne, followed by protonation of the resulting alkene intermediate to form a carbocation.

The carbocation then undergoes nucleophilic attack by water, followed by deprotonation to yield the final ketone product.

It's worth noting that the use of mercury salts as catalysts in organic reactions is generally discouraged due to their toxicity and potential environmental impact.

There are alternative catalysts that can be used for the hydration of alkynes, such as palladium or platinum complexes.

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The terms included in the chemistry are Molecules , Atoms, Reactions , Equations, Processes.

In chemistry, there are several important terms that are used in order to describe reactions, equations, and processes. These terms include:

-Molecules: A group of atoms bonded together.

-Atoms: The smallest unit of an element that can take part in a chemical reaction.

-Reactions: The process of one or more substances changing into new substances.

-Equations: A mathematical representation of a chemical reaction that states the reactants and products involved.

-Processes: A set of operations performed in order to produce a desired result.

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Cations are always smaller than the atoms from which they form. Anions are always larger than the atoms from which they form. Ions are usually bigger than the atoms from which they are formed.

When an atom receives or loses electrons, the atom's electron configuration changes, resulting in a net positive or negative charge.

This net charge expands the electron cloud surrounding the nucleus, making the ion bigger in size than the neutral atoms from which it arose. When a metal atom loses one or more electrons to create a cation, it shrinks in size because the positive charge of the nucleus pulls the remaining electrons more strongly.

When a nonmetal atom obtains one or more electrons to create an anion, it normally expands in size.Because of the increasing amount of electrons, the electron cloud surrounding the nucleus grows. It should be noted that this comparison is not absolute and is dependent on the individual factors involved. Some ions are smaller than their neutral atom counterparts, while others are similar in size.

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The complete question is:

Compare the size of ions to the size of atoms from which they form.

Answer:

4 is answer. Explain how you know it is emit or absorb.

Explanation:

U-238 is a radioactive isotope of uranium, meaning it undergoes radioactive decay. Specifically, U-238 undergoes alpha decay, which involves the emission of an alpha particle. An alpha particle is composed of two protons and two neutrons, which is equivalent to a helium-4 nucleus.

The fact that U-238 is unstable and undergoes alpha decay can be determined based on its nuclear properties. U-238 has an atomic number of 92, indicating it has 92 protons in its nucleus. However, its atomic mass is 238, suggesting it has more than 92 nucleons (protons and neutrons) in its nucleus. This indicates the presence of additional neutrons in the U-238 nucleus.

The extra neutrons in the U-238 nucleus make it unstable and prone to decay. To achieve a more stable configuration, U-238 spontaneously emits an alpha particle from its nucleus. This emission reduces the number of protons and neutrons in the nucleus, resulting in the formation of a different nucleus.

Therefore, based on the radioactive properties of U-238, it is known to be unstable and spontaneously emit alpha particles during the process of radioactive decay.

Approximately 3.04 grams of magnesium would be required to react with 0.25 moles of hydrochloric acid.

To determine the mass of Mg required, we need to use the balanced chemical equation for the reaction between hydrochloric acid (HCl) and magnesium (Mg):

2HCl + Mg → MgCl2 + H2

From the balanced equation, we can see that 2 moles of HCl react with 1 mole of Mg. Therefore, if 0.25 mol of HCl reacts, we would need half of that amount, which is 0.125 mol of Mg.

To calculate the mass of Mg required, we need to multiply the number of moles of Mg by its molar mass. The molar mass of Mg is given as 24.31 g/mol. Therefore, the mass of Mg required can be calculated as follows:

Mass of Mg = Number of moles of Mg × Molar mass of Mg

Mass of Mg = 0.125 mol × 24.31 g/mol

Mass of Mg = 3.04 g

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In the reaction Si(s) + 2Cl2(g) → SiCl4(g), we predict an increase in entropy (a positive ΔS). Therefore, the reaction results in an increase in entropy (a positive ΔS).

Entropy is a measure of the disorder or randomness of a system. When the number of particles or molecules in a system increases, the entropy of the system also increases. In the given reaction, we start with solid silicon (Si) and two molecules of chlorine gas (Cl2), which have a lower degree of randomness compared to the products. The products, silicon tetrachloride (SiCl4) and two molecules of chlorine gas (Cl2), have more particles and a higher degree of randomness.

Entropy increases when there is an increase in the number of particles or the disorder of the system. In this reaction, there are four reactant particles (2ClF3 and 2 O2) and four product particles (1 Cl2O and 3 OF2). However, the reactants include a liquid phase (2ClF3), while all the products are in the gas phase. Since gases have higher entropy than liquids due to increased freedom of movement, this reaction results in an increase in entropy.

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Answer:

There are C - C  bonds and C - H bonds.

trust me! I took a test with this question and got 100! :)

Explanation:

Answer:

Increases

Explanation:

Alkali metal react vigorously with water (For eg sodium in water). In this process, H2 gas is given off and the metal hydroxide is produced.

The speed and the observed violence of the reaction increases as you go down the group or in other words, The Group 1 metals become more reactive towards water as you go down the Group.

This trend is observed because it takes less energy for reaction to occur with water as you move down the group. Lower activation energies = faster reactions

Answer:

The group that tests the variable.

Explanation:

The group that tests the variable is a control group.

Answer:

C when testing the group put the varible in control

Answer:

endothermic

Explanation:

condensate is an endothermic change

Answer:

C. 3.2 cm

Explanation:

We need to compare the values given in different units and convert them to a common unit for comparison. The smallest unit of measurement among the given options is nanometers (nm). Therefore, we need to convert all the values to nanometers and compare them.

1 cm = 10 mm

1 mm = 1,000,000 nm

Converting the given values to nanometers:

A. 320 cm = 320 x 10 mm = 3200 mm = 3,200,000,000 nm

B. 3.2 m = 3.2 x 100 cm = 320 cm = 3,200,000,000 nm

C. 3.2 cm = 3.2 x 10 mm = 32 mm = 32,000,000 nm

D. 3.2 x 102 mm = 3.2 x 102 x 1,000,000 nm = 3,200,000,000 nm

E. 3.2 x 106 nm = 3,200,000,000 nm

Comparing the values in nanometers, we see that options C is the smallest and has the same value of 32,000,000 nm. Therefore, the answer is (C) 3.2 cm

In this question, 5.60 moles of gas were added to the container.

The number of moles of gas added to the container can be calculated using the ideal gas law. The ideal gas law equation is PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

First, we need to convert the temperatures from Celsius to Kelvin. To convert Celsius to Kelvin, we add 273.15. So, 22°C + 273.15 = 295.15 K and 40°C + 273.15 = 313.15 K.

Next, we can use the ideal gas law for the initial and final conditions of the gas sample:

Initial: P₁V₁ = n₁RT₁

Final: P₂V₂ = n₂RT₂

Since the volume is constant, V₁ = V₂. The gas constant R is constant as well.

Using these equations, we can set up a ratio to find the number of moles of gas added:

(P₂/P₁) = (n₂/n₁) * (T₂/T₁)

Plugging in the given values:

800 torr / 400 torr = (n₂ / 2.80 moles) * (313.15 K / 295.15 K)

Simplifying the equation, we find that n₂ = 5.60 moles. Therefore, 5.60 moles of gas were added to the container.

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The given question is incomplete. The complete question is:

The decomposition of carbon disulfide, \(CS_2\), to carbon monosulfide, CS, and sulfur is first order with k = \(2.8\times 10^{-7}s^{-1}\) at 1000oC.

\(CS_2\rightarrow CS+S\)

What is the half-life of this reaction at 1000oC?

Answer: The half-life of this reaction at 1000oC is 2400000s.

Explanation:

Expression for rate law for first order kinetics is given by:

\(t=\frac{2.303}{k}\log\frac{a}{a-x}\)

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant  

a - x = amount left after decay process  

for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

\(t_{\frac{1}{2}}=\frac{0.693}{k}\)

\(t_{\frac{1}{2}}=\frac{0.693}{2.8\times 10^{-7}s^{-1}}=0.24\times 10^7s\)

The half-life of this reaction at 1000oC is 2400000s.

This yields a mass of 16.47 g of concentrated sulfuric acid.

Sulfuric acid, also known as oil of vitriol, is a strong mineral acid with the molecular formula H2SO4.

Volume of concentrated sulfuric acid needed = 5.00 L x (18.0 m / 10.0 m)

= 9.00 L

Mass of concentrated sulfuric acid needed = 9.00 L x 1.83 g/cm3

= 16.47 g

The volume of concentrated sulfuric acid needed to make 5.00 L of 10.0 m sulfuric acid can be calculated by multiplying the volume of the solution (5.00 L) by the molarity of the concentrated sulfuric acid (18.0 m) divided by the desired molarity of the solution (10.0 m). This yields a volume of 9.00 L of concentrated sulfuric acid. The mass of concentrated sulfuric acid needed can then be calculated by multiplying the volume of concentrated sulfuric acid (9.00 L) by the density of sulfuric acid (1.83 g/cm3). This yields a mass of 16.47 g of concentrated sulfuric acid.

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Answer:

This is a unclear answer.

Explanation:

N/a

Answer:

If the temperature of the system is increased, then the equilibrium position would shift to the right side. According to Le Chatelier's principle, when a stress is applied to a system in equilibrium, the system will adjust itself to counteract the stress. In this case, increasing the temperature would be an external stress on the system, and the reaction would shift to consume more of the reactants, namely CH4 and H2S, to create more of the products, CS2 and H2, thus shifting the equilibrium position towards the products.

Explanation:

Answer:

Metal.

Explanation:

I think its the metal because when you cut it, it had metal in it.

Answer:

It is difficult, if not impossible, to heat a solid above its melting point because the heat that ... in a solid are packed in a regular structure that is characteristic of that particular substance.