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Answer:

Shorter waves vibrate at higher frequencies and have higher energies. Red light has a frequency of around 430 terahertz, while blue's frequency is closer to 750 terahertz. Red photons of light carry about 1.8 electron volts (eV) of energy, while each blue photon transmits about 3.1 eV.

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Answer:

Electrons

Explanation:

Answer:

53.4%

Explanation:

N₂ + 3H₂ → 2NH₃

Given that:

26.3 g of H₂ react with N₂ to produce 79.0 g of NH₃

Then:

The number of moles of H₂ = 26.3g of H₂ * (1 mol of H₂/ 2.02g of H₂)

= 13.05 mol of H₂

The number of moles of NH₃ = 13.05 mol of H₂ * ( 2mol of NH₃/ 3 mol of H₂)

= 8.697 mol of NH₃

The mass of NH₃ = 8.697 mol of NH₃ *( 17.04g of NH₃/ 1 mol of NH₃) = 148.1 g of NH₃

The percent yield = actual yield/ theoretical yield * 100%

The percent yield = ( 79.0 g/ 148.1 g )* 100%

The percent yield ≅ 53.4 %

Answer:

53.4

Explanation:

Answer:

The Bohr model and all of its successors describe the properties of atomic electrons in terms of a set of allowed (possible) values. Atoms absorb or emit radiation only when the electrons abruptly jump between allowed, or stationary, states. Direct experimental evidence for the existence of such discrete states was obtained (1914) by the German-born physicists James Franck and Gustav Hertz.

Explanation:

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Answer:ok

Explanation:

Answer:

Gases have two properties that set them apart from solids and liquids. First, gases spontaneously expand to fill the container they occupy, no matter its size. In other words, a gas has no fixed volume or shape. Secondly, gases are easily compressible.

Explanation:

Hope this helps

Answer: It will take 68 days for the palladium to decay.

Explanation: ima smart dude

Answer:

f = 0.6× 10¹⁶ Hz

Explanation:

Given data:

Wavelength of radiation = 5.00 × 10⁻⁸ m

Frequency of radiation = ?

Solution:

Formula:

Speed of light = wavelength × frequency

speed of light = 3 × 10⁸m/s

Now we will put he values in formula.

3 × 10⁸m/s = 5.00 × 10⁻⁸ m ×  f

f = 3 × 10⁸m/s / 5.00 × 10⁻⁸ m

f = 0.6× 10¹⁶ s⁻¹

s⁻¹ = Hz

f = 0.6× 10¹⁶ Hz

Answer:

159g

Explanation:

Copper (I) sulfide is formed by the chemical reaction between copper and sulfur. Copper is a limiting reagent that results in the formation of 190.26 grams of copper(I) sulfide.

A limiting reagent is defined as the reactant that gets completely utilized in the reaction and affects the amount of the product formation. On the contrary, the excess reagent is present in more amounts.

Given,

Mass of copper = 127 gm

Mass of sulfur = 41 gm

Moles of copper:

n = mass ÷ molar mass

n = 127 ÷ 63.546

n = 1.99

Moles of sulfur:

n = 41 ÷ 32.065

n = 1.27

The reaction is shown as:

Cu + S → CuS

Here, 9 g of sulfur remains unreacted and hence is an excess reagent, and copper being consumed is a limiting reagent.

Here, 1 mole of copper reacts to form 1 mole of copper sulfide hence, 1.99 moles of Cu produces, 1.99 moles of copper sulfide.

Mass of CuS is calculated as:

Mass = moles × molar mass

Mass = 1.99 mol × 95.611 g/mol

= 190.26 grams

Therefore, 127 gm of copper and 41 gm of sulfur produces 190.26 grams of copper sulfide.

Learn more about limiting reagents, here:

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Answer:

Letter D

Explanation:

false

Explanation:

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Answer:

i dont see tha pic

Explanation:

Answer: proton

Explanation:

They are what give an atom it’s identity

Answer:

B

Explanation:

Oxygen (O2) is made up of two oxygen atoms but, just of one kind of atom oxygen (O), So it's an element. Water (H2O) is made up of two hydrogen atoms (H) and one oxygen atom (O), so it's a compound

Answer:

hydrogen and oxygen.

Explanation:

Answer:

light is the result of electrons moving between defined energy levels in an atom called shells.

Explanation:

when something exited an atom like collision with another atom or a chemical reaction, an electron may absorb energy boosting it to a higher level shell.

Answer:

Water has strong hydrogen bonds between molecules. These bonds require a lot of energy before they will break. This leads to water having a higher boiling point than if there were only weaker dipole-dipole forces. Water also has a high specific heat.

Explanation:

Hope this helped it is what I could find!

Answer: Water has a higher boiling point than expected because hydrogen and oxygen form single covalent bonds. Molecules of water is bound together by strong attractions which needs high energy to break resulting to a higher boiling point of water than most substances.

Explanation: Water has strong hydrogen bonds between molecules. These bonds require a lot of energy before they will break. This leads to water having a higher boiling point than if there were only weaker dipole-dipole forces. Water also has a high specific heat.

Explanation:

Synthetic fiber or synthetic fibre (in British English; see spelling differences) are fibers made by humans through chemical synthesis, as opposed to natural fibers that are directly derived from living organisms. They are the result of extensive research by scientists to improve upon naturally occurring animal and plant fibers. In general, synthetic fibers are created by extruding fiber-forming materials through spinnerets, forming a fiber. These are called synthetic or artificial fibers. Synthetic fibers are created by a process known as polymerization, which involves combining monomers to make a long chain or polymer. The word polymer comes from a Greek prefix "poly" which means "many" and suffix "mer" which means "single units". (Note: each single unit of a polymer is called a monomer). There are two types of polymerization: linear polymerization and cross-linked polymerization.

Synthetic material are madeup of monomers and long chain of monomers are known as polymers. The process is known as polymerization and the synthetic material are turned as microplastic which takes a long period of time to decompose. By this way the synthetic materials are very harmful for the society.

Synthetic materials are microplastic pollution and madeup up of polymers which is a long chain of polymers and the process is known as polymerization.

The synthetic materials are often converts into microplastic that takes a long period of time  to decompose and they are also responsible for generation of greenhouse gases.The synthetic material which is popularly known is nylon which is very tough to recycle.

Therefore,synthetic material are turned as microplastic which takes a long period of time to decompose. By this way the synthetic materials are very harmful for the society.

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°ΔG rxn = -1108.7

Maybe the question is like this

the value of ΔG° at 25 °C for the formation of POCl₃

Reaction

P₂(g)+O₂(g)+3Cl₂(g)⇒2POCl₃(g)

Formula

[tex]\tt ^o\Delta G_{rxn}=^o\Delta G_f~product-^o\Delta G_f~reactants[/tex]

You can find table to find ΔG° at 25 °C(298 K)

°ΔG POCl₃ = -502.5 kJ/mol

°ΔG O₂ and °ΔG Cl₂ = 0

°ΔG P₂ = 103.7 kJ/mol

[tex]\tt ^o\Delta G_{rxn}=2.^o\Delta G~POCl_3-^o\Delta GP_2\\\\^\Delta G_{rxn}=2.(-502.5)-103.7=-1108.7~kJ/mol[/tex]

Answer:

B. There were 1,570 kJ of energy in the snack.

C. During her run, she used 755 Calories of energy.

F. The runner used more Calories while running than she consumed during her snack.

Explanation:

According to this question, a runner eats a snack with 375 Calories of nutritional energy. After her snack, she burns 3,160 kJ while running.

Since 1 Calorie = 4.184 kJ, it means that the runner consumed 375 × 4.184 = 1570 kJ of energy. In other words, THERE WERE 1,570 kJ OF ENERGY IN THE SNACK.

Also, the runner burns 3,160 kJ while running meaning that she equivalently burnt 3160/4.184 = 755.258 calories. Approximately, 755 calories of energy were burnt by the runner while running.

In a nutshell, the runner consumed 375 calories of energy in her snack but used up 755 calories while running. This means that the runner used more Calories while running than she consumed during her snack.

Answer:

Ionic Bonds are formed from metal to nonmetals. Covalent Bonds usually form from nonmetals.

Explanation:

Answer: The mass of the nucleus is less than the mass of the 8 protons and 8 neutrons.

Explanation:

Answer:

Float

Explanation:

If the weight of liquid displaced and the weight of an object are the same, the object will float in the liquid.

From Archimedes principle, when an object is immersed in fluid, a force called upthrust supports it and it equal to the weight of the liquid displaced.

When in a liquid, the weight of the liquid displaced is the same as that of the of the object, it will float and not sink.

Answer:

Exothermic, it obeys the law of conservation of energy

Explanation:

The reaction is an exothermic change. In this kind of change, heat is liberated to the surrounding. So the surrounding becomes hotter at the end of the heat change.

In chemical reactions that involves the loss of energy as heat, they obey the law of conservation of energy.

The law of conservation of energy states that energy is neither created nor destroyed but transformed from one form to another. In such reactions as this, chemical energy is transformed into heat energy.

Answer:

i dont really have explaining but see green leaf have some amount of water and chlorophyll so it doesn't get burnt and dry leaves lose water and have no amount of them so they get burnt