Which is the best surface for absorbing heat radiation? ☆ Shiny white Shiny black Dull black Dull white​

The observations that are applied are as follows:

NH3 is present.

N2 combines with H2 in a 1:3 ratio.

When nitrogen reacts with hydrogen, it yields ammonia. The chemical equation can be expressed as follows:

N2(g) +3H2(g)---> 2 NH3(g)

The stochiometric ratio in which nitrogen and hydrogen reacts is the ratio 1:3. And the when the reaction is completed, only NH3 is present. At constant T and P, 2.0 L of nitrogen gas are combined with 6.0 L of hydrogen gas to form ammonia.

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Answer:

Glow sticks give off light but not heat because energy is released, the glow stick reaction is an example of exergonic (energy-releasing) reaction. However, it is not an exothermic (heat-releasing) reaction because heat isn't released... endothermic reactions absorb heat.

Explanation:

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Answer:

A wave is a form of energy therefore, it travels through matter in the form of packets of energy. Examples of waves include light, heat and sound waves. Matter from where the waves travel is known as a medium such as if waves travel through ocean then water is the medium.

Explanation: hope this helps

The coefficient for HCl is 2, according to the balanced quation :

\(Mg (s) + 2HCl (g)\) ⇒ \(MgCl_{2} (aq) + H_{2} (g)\)

The following balanced equation describes how magnesium reacts with hydrochloric acid:

\(Mg (s) + 2HCl (g)\) ⇒ \(MgCl_{2} (aq) + H_{2} (g)\)

This experiment can be used to demonstrate the production of hydrogen gas, a single replacement reaction, or the typical reaction of metals with acid. Holding a match or fireplace lighter cautiously up to the exploding hydrogen bubbles will show how flammable hydrogen gas is. As the hydrogen burns, there is a noticeable cracking sound.

Therefore, the cofficient for HCl according to the balanced equation \(Mg (s) + 2HCl (g)\) ⇒ \(MgCl_{2} (aq) + H_{2} (g)\) is 2.

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Answer:

9.3×1015 atoms Pb make up 1.5×10−8mol Pb

Answer:  13.8 moles of \(CO_2\) and 18.4 moles of \(H_2O\) will be produced

Explanation:

The given balanced reaction is;

\(C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(g)\)

Given : 4.6 moles of \(C_3H_8\)

According to stoichiometry :

1 mole of \(C_3H_8\) give = 3 moles of \(CO_2\)

Thus 4.6 moles of  \(C_3H_8\) will give =\(\frac{3}{1}\times 4.6=13.8moles\)  of \(CO_2\)

1 mole of \(C_3H_8\)  give =  4 moles of \(H_2O\)

Thus 4.6 moles of \(C_3H_8\) give =\(\frac{4}{1}\times 4.6=18.4moles\)  of \(H_2O\)

Thus 13.8 moles of \(CO_2\) and 18.4 moles of \(H_2O\) will be produced from the given moles of reactant \(C_3H_8\)

With a balanced reaction, we can determine the moles of products. The balanced equation will be:

FeCl3 + 3NH4OH → Fe(OH)3 + 3NH4Cl

They says that NH4OH is in excess, so, the limiting reactant will be FeCl3 and we will do all the calculations with this reactant.

We have to calculate the moles of FeCl3, we will use the molar mass:

Now, to calculate the moles of the products we must take into account the product/reactive ratios, for this we are guided by the coefficients that accompany the molecules.

Ratio Fe(OH)3 to FeCl3 = 1/1

Ratio NH4Cl to FeCl3 = 3/1

Moles of each product

Moles of Fe(OH)3

Moles of NH4Cl

The grams of each product we will find by multiplying the moles by the molar mass. So we have.

g of Fe(OH)3

g of NH4Cl

Answer:

Compounds From Decaying Matter.

Explanation:

A long time ago, when these were compounds in the ground. They were under lots of pressure, and then they turned into coal/diamonds.

Answer:

A change is called irreversible if it cannot be changed back again. For example you cannot change a cake back into its ingredients again. Irreversible changes are permanent.

Explanation:

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Answer:

Longer bonds have lower attractive force

The rules for deciding which digits in a measurement are significant are as follows: Rule 1: All nonzero digits in a measurement are significant.

What are measured quantities?

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The boiling point of water is 100.0 °C, the boiling point of the solution will be : 101.49 °C.The correct answer is option (a) 100.00049 °C.

Ideal Solution : An ideal solution is a homogeneous mixture of two or more components that obeys Raoult's law, which states that each component's vapor pressure is proportional to its mole fraction.The boiling point of a solution depends on the solvent's properties and the solute's concentration. It's dependent on the mole fraction of the solvent and solute, as well as the total concentration of the solution. The change in boiling point of a solution is given byΔTb = Kb × m × i, whereKb = ebullioscopic constant, m molarity of the solution, and i = van't Hoff factor.Assuming that the solution's behavior is ideal, we may use the molality of the solution to compute the boiling point elevation of the solution.The molality of the solution is given by the following formula:m = (n₂ / m₂) ÷ (n₁ / m₁), where n is the number of moles, m is the mass, and the subscripts 1 and 2 refer to water and non-volatile solute sucrose, respectively.The molar mass of sucrose (C₁₂H₂₂O₁₁) is342.3 g/mol; therefore, the number of moles of sucrose is115.0 g ÷ 342.3 g/mol = 0.335 mol.m₁ = mass of water = 350.0 g, and m₂ = mass of sucrose = 115.0 g, as given in the problem.Therefore, the molality of the solution is given by:m = (0.335 mol / 0.115 kg) ÷ (1 mol / 1 kg) = 2.91 mol/kg.Substituting these values in the formula for ΔTb, we get:ΔTb = Kb × m = 0.512 °C m⁻¹ × 2.91 mol/kg = 1.49 °C.100.0 °C + 1.49 °C = 101.49 °C.

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The force by which an object is attracted towards the earth is called the gravitational force. Pushing an object by exerting a force opposite to it is normal force. The force generated by rubbing two objects against each other and resisting motion is friction force and the pulling force from opposites sides is called tension.

Force is an external agent acting on a body to change it from the state of motion or rest. There are various kinds of force such as frictional force, magnetic force, gravitational force etc.

Gravitational force is the force by  which the an object attracts other objects into its center of mass. Earth is attracting all bodies into its surface by gravitational force.

Pushing an object by exerting a force opposite to it is normal force. The force generated by rubbing two objects against each other and resisting motion is friction force and the pulling force from opposites sides is called tension.

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Answer:

negative charge

Explanation:

protons have a positive, nuetrons have a neutral charge , and electrons have a negative.

The correct answer is B. 8 molecules \(SO_3\). Option B

In the given reaction:

S(s) + \(O_2\)(g) → \(SO_3\)(g)

The stoichiometric coefficient in front of the \(SO_3\)molecule is 8, which indicates that 8 molecules of \(SO_3\)are formed as a product. This coefficient represents the ratio of the number of molecules involved in the reaction.

Option A (8 atoms \(SO_3\)) is incorrect because it only mentions the number of atoms, not molecules. The stoichiometric coefficient does not represent the number of atoms, but rather the number of molecules.

Option C (80.07g \(SO_3\)) is incorrect because it mentions a specific mass. The stoichiometric coefficient does not directly represent the mass of the substance, but rather the relative amount of molecules involved in the reaction.

Option D (32 \(SO_3\)) is incorrect because it mentions a specific volume. The stoichiometric coefficient does not directly represent the volume of the substance, but rather the relative amount of molecules involved in the reaction.

Therefore, the correct way to describe the \(SO_3\)component in the reaction is option B: 8 molecules \(SO_3\). This represents the ratio of the number of molecules of \(SO_3\)that are produced in the reaction.

Option B

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The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Answer: Atoms are the smallest particles of an element.

Answer:

metallic bonds are defined as those in which metals share valence electrons for example when sodium metallically bonds with itself each atom is sharing the electrons in the third orbital with up to eight other atoms the same thing happens with magnetism or other metals metallically bond to themselves.

Because air puffs up the cream as it is whipped, there is a physical change even though the ingredients are still cream and air.

Physical modifications are those that affect a chemical substance's form but not its chemical content. Physical changes may normally be used to separate compounds into chemical elements or simpler compounds, but they cannot be used to separate mixtures into their component compounds.

Liquid cream is extensively combined with small air bubbles to form the foam colloid known as whipped cream. Because milk is transformed from a colloid (cream) to a solid (butter) without changing its chemical makeup, turning milk into butter is a physical transformation. This change in the body can be undone.

Thus, there is a physical change even though the ingredients are still cream and air.

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We can see here that the best fuel is the one that produces the most heat per unit mass. In this case, the fuel that produces the most heat per unit mass is methanol.

Fuel is a substance that is used to produce energy through combustion or other chemical reactions. It is commonly utilized to power various forms of transportation, generate heat or electricity, and operate machinery and appliances.

The results of the experiment are shown below:

Fuel            Mass (g)      Heat produced (J)       Heat per gram (J/g)

Methanol 1.0                          350                   350

Ethanol         1.0                          250                   250

Propane         1.0                          200                   200

Butane         1.0                          150                            150

Pentane         1.0                          100                            100

It is important to note that the results of this experiment are only a measure of the heat produced by the fuels.

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Dr. Trane's explanation is based on the psychodynamic perspective while Dr. Uni's explanation is based on the behavoiural perspective. The correct option is option C.

Psychodynamic perspective is a psychological approach that focuses on the unconscious mind and how it affects the behavior. According to the psychodynamic perspective, unconscious urges and conflicts that have their roots in early experiences shape how people behave. This approach is developed by Sigmund Freud.

Behavioral perspective

This is the psychological approach that focuses on observable behavior and the influence of the environment on an individual's actions. According to behaviorists, who also emphasize the significance of understanding and influencing behavior without probing interior mental processes, behavior is learnt through interactions with the environment. The early behaviourists are J.F Skinner, John B. Watson and Ivan Pavlov.

These perspectives are parts of psychoanalysis.

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Answer:

This process of growing, moving and shedding takes about four weeks. SO I would think dividing is around a month

Explanation:

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Answer:

1/2 to 1 and 1/2 hours

Explanation:

Skin cells go through the division phase that takes between 1/2 to 1 and 1/2 hours to complete, depending on the location. Body cells, which include skin, hair, and muscle, are duplicated through the process of mitosis. Skin cells belong in the category of somatic cells and are duplicated at a rapid rate during life.

Answer:

Kinetic Energy

Explanation:

Warmer air particles are vibrating in place faster than cooler air, and motion is relative to kinetic energy.

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if i am correct the volume of nitrogen gas has to equal to molecules density, making the substance 1.27 liters :)

The application of force in the direction of the motion of an object. The second scenario involves applying force to a moving item that is traveling in the opposite direction.

A force is an influence that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. A force has both a direction and a magnitude.

Force is used to describe a body's tendency to modify or change its state as a result of an external cause. When force is applied, the body can also alter its size, shape, and direction.

A push or pull that an object experiences as a result of interacting with another item is known as a force. Every time two items interact, a force is exerted on each of the objects. The force is no longer felt by the two objects when the interaction ends.

Thus, Force applied to an item in motion that originates in any direction constitutes the third situation where force is created.

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You are holding two balloons, a red balloon and a white balloon. The red balloon is filled with neon gas (Ne) and the white balloon is filled with argon (Ar) gas. The mass ratio of Ne:Ar in the balloons is 2:1.

The atomic number 10 and the letter Ne are assigned to the chemical element neon. That would be a noble gas. Neon gas is a normally occurring colorless, odorless, inert monatomic gas with a density roughly equal to that of air. When nitrogen, oxygen, argon, and carbon dioxide were eliminated from dry air in 1898, only three uncommon inert elements remained (together with krypton and xenon). Neon, the second of these three rare gases to be discovered, was readily recognized as a brand-new element due to its vivid red emission spectrum. Since neon is chemically inert, no uncharged neon compounds are known to exist. Neon provides a unique reddish-orange glow when used in high-voltage discharge tubes, neon advertising signs, and low-voltage neon glow lamps. The red emission line from neon also contributes to the well-known red light of helium-neon lasers. Despite having few other commercial uses, neon is used in a number of plasma tube and refrigerant applications. It may be inexpensively extracted from liquid air using fractional distillation.

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2 brome butane

it has 4 C atoms therefor we know it is a butan-- and the brome is placed in the second carbone so that gives the answer 2 brome butane

Answer:

it's approximately 192.9384000067 cm

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Answer:

No.

Explanation:

Under TLC chromatography, the compounds are separated based on the different affinity between stationary phase and mobile phase. The higher difference between Rf's of the compounds will produce the better separation.

In Hexane compound A has a Rf of 0.35 and compound B of 0.45.

The difference is 0.45 - 0.35 = 0.10

In dietyl ether, Rf of compound A is 0.45 and for compound B is 0.60.

The difference is 0.60 - 0.45 = 0.15.

As the difference in Rf is higher for dietyl ether:

Hexane would be better for separating a mixture of compounds A and B by TLC. NO. The better separation would be using dietyhl ether.

Answer:

that's a good question but I'm not too sure