1. The energy associated with an electromagnetic radiation of [tex]6.34 \times 10^{15} \;Hertz[/tex] is equal to [tex]4.2 \times 10^{-18}\;Joules[/tex].
2. The frequency of one of the bands of the sodium emission spectrum is [tex]5.13 \times 10^{14}\;Hertz[/tex]
Given the following data:
Frequency = [tex]6.34 \times 10^{15} \;Hertz[/tex]Wavelength = 585 nm to m = [tex]5.85 \times 10^{-7}\;meters[/tex]Scientific data:
Speed of light = [tex]3 \times 10^8\;meters[/tex]Planck constant = [tex]6.626 \times 10^{-34}\;J.s[/tex]1. To determine the energy associated with an electromagnetic radiation of [tex]6.34 \times 10^{15} \;Hertz[/tex], we would apply Einstein's equation for photon energy:
Mathematically, Einstein's equation for photon energy is given by the formula:
[tex]E =hf[/tex]
Where:
E is the energy.h is Planck constant.f is photon frequency.Substituting the given parameters into the formula, we have;
[tex]E = 6.626 \times 10^{-34}\times 6.34 \times 10^{15} \\\\E = 4.2 \times 10^{-18}\;Joules[/tex]
2. To determine the frequency of one of the bands of the sodium emission spectrum:
Mathematically, the frequency of a wave is given by the formula:
[tex]Frequency = \frac{Speed}{wavelength} \\\\Frequency = \frac{3 \times 10^8}{5.85 \times 10^{-7}} \\\\Frequency =5.13 \times 10^{14}\;Hertz[/tex]
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What is obesity and hemoglobin?
Answer:
obesity means having too much fat
hemoglobin is a protein in red blood cells .
for example if your hemoglobin is low you are anemic.
obesity if you are overweight your health is at risk because of excess fat.
If two trucks are moving at the same speed, but truck A has a mass of 3,000 kg, and truck B has a mass of 4,500 kg, what statement is true?
Question 3 options:
Truck A has greater kinetic energy.
Truck A will have a greater stopping distance.
Truck B will have a greater stopping distance.
Truck B has less kinetic energy.
Answer:
C, Truck B will have a greater stopping distance. Took the test got it right.
Explanation:
Answer:
the answer is c
Explanation: the truck with less kg means that it will be more likely to stop fast but if you have a high kg it will slide till it stops thus the answer is c
Write the balanced chemical equation for the following reaction. Also, classify the
reaction as sythesis, decomposition, single replacement, double replacement, or combustion.
aluminum sulfate + barium chloride —> aluminum chloride + barium sulfate
Answer:
Explanation:
Al2(SO4)3 + 3BaCl2 ====> 2AlCl3 + 3BaSO4
Sorry forgot to say that it is a double replacement. The Ba goes where there Aluminum is and the Aluminum goes where the Barium is.
The internal balance numbers come from the fact that the ions and complex ions have different valance numbers.
What is the relationship between Avogadro number, mole, and mass number?
What products would you expect from the reaction of ammonia and sulfuric acid in aqueous solution
Answer:
(NH4)2SO4
Explanation:
2NH3(aq) + H2SO4 (aq) ---> (NH4)2SO4(aq)
Ammonia reacts with sulfuric acid to give the fertilizer ammonium sulfate.
can the following alcohol be prepared as a single product by hydroboration-oxidation of an alkene? can it be prepared as a single product by the acid-catalyzed addition of h2o to an alkene? select the single best answer.
Answer:
Yes both methods give a single product.
Explanation:
The answer can be Yes, both the methods will yield a single product. The correct option is D.
What is alcohol formation?Alcohols can be made by hydrating alkenes or reducing aldehydes, ketones, acids, and esters. Water elements can be added to an alkene's doublebonded carbons in either a Markovnikov's or an antiMarkovnikov's manner.
When yeast ferments the sugars in grains, fruits, and vegetables, it produces it. For example, wine is made from grape sugar, and vodka is made from potato sugar.
In the presence of a catalyst, lower molecular weight olefins react with carbon monoxide and hydrogen in a reaction known as hydroformylation or the oxo reaction. The resulting aldehyde is then hydrogenated to produce alcohol.
Thus, the correct option is D.
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Your question seems incomplete, the probable complete question is attached below:
- Explain the relationship between electronic structure and the chemical
properties of an element.
Answer: There is a relationship between the electron configuration of an element and its resulting chemical/physical properties. Atoms of an element like to have a full octet of electrons in their valence shells. ... Other elements need to lose or gain electrons to obtain an octet.
:
Lead has a density of 11.29 g/mL. If you had 186 g of lead, what would its volume be?
what is the electron configuration of a n3- anion?
Answer:
You can see in the above illustration of the periodic table that N is in Period 4, Group 5A, and p-block. Before reaching N, you will pass through the atomic orbitals 1s, 2s, and 2p. The electron configuration of N3- is N3-: 1s22s22p6 .
Explanation:
What was the effect of decreasing the copper's mass?
Answer:
Decreasing the temperature of the copper made the final temperature decrease.
Heat emitted by copper reduces as copper's mass decreases. As the mass of copper lowers due to a decrease in heat gain by water, the final temperature also drops.
What is heat?The transfer of kinetic energy from an energy source to a medium, an object, or from one to the other is referred to as the creation of heat. The sun is the source of all energies. It is the natural source of solar energy, heat, and light. Thermal energy can move through three different channels: conduction, convection, and radiation.
Therefore, the increase in temperature is always proportionate to the mass of water. Thus, the final temperature will be lower if we increase the water mass. The temperature will be lower in the end. The density reduces as volume grows. Consequently, density drops as temperature rises.
Thus, heat emitted by copper reduces as copper's mass decreases. As the mass of copper lowers due to a decrease in heat gain by water, the final temperature also drops.
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A compound is 2. 00% H by mass, 32. 7% S by mass, and 65. 3% O by mass. What is its empirical formula? The third step is to calculate the mole ratios of the elements present. To do this, you will divide each molar amount by the smallest molar amount. The molar amounts of the elements present are:.
What is the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen
A precious metal is _________________ a. An element with super and electric and thermal conductivity, high luster, and sensitivity. B. A highly sought after dense, shiny, soft precious metal that has been used as money for many centuries. C. An highly valuable element with super and electric and thermal conductivity, high luster, and sensitivity. D. A soft, sensitive, and lustrous element with the highest conductivity of any element. Please select the best answer from the choices provided A B C D.
Answer:
c.
an highly valuable element with super and electric and thermal conductivity, high luster, and sensitivity.
Explanation:
A precious metal is a highly valuable element with super and electric and thermal conductivity, high luster, and sensitivity, hence option C is correct.
How precious metal is differed from the base metal?Rare metallic chemical elements with a high economic value are known as precious metals. The valuable metals are often less reactive chemically than most elements.
Iron-free metals and alloys are not considered base metals. Base metals have a propensity to tarnish, oxidize, or corrode with time or when exposed to the environment, in contrast to valuable metals.
Base metals typically cost less than precious metals since they are more plentiful in nature and sometimes easier to mine.
Therefore, a precious metal is a highly valuable element with super and electric and thermal conductivity, high luster, and sensitivity.
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6.02 times 10 to the 23 atoms of an element have a mass in grams equivalent to the mass of how many of the atoms in amu?
Answer:
Relation between AMU and Gram
The mass of an atom in amu is numerically the same as the mass of one mole of atoms of the element in grams. One atom of sulfur has a mass of 32.07 amu; one mole of S atoms has a mass of 32.07 g. For compounds, the molecular mass (in amu) is numerically the same as the mass of one mole of the compound in grams.
Explanation:
i hope this helps and can i have branly plz
Does molasses need to be refrigerated after opening?
what did immortality-seeking alchemists create by mixing sulfur, charcoal, and potassium nitrate?
Answer:
Gunpowder was discovered somewhat inadvertently by Chinese alchemists, who were trying to develop an elixir of immortality. If you're not aware, there are three primary components to gunpowder: saltpeter (potassium nitrate), sulfur, and charcoal. ... The use of sulfur by the Chinese is also ancient.
Explanation:
What property determines whether an acid is a strong acid or a weak acid?
The dissociation of the ions
The total number of molecules
The pH of the acid
Answer:
the pH of the acid is the property that determines whether an acid is a strong acid or a weak acid
What enzyme catalyzes the conversion of carbon dioxide and water to carbonic acid, and where is this enzyme located
Answer:
Carbonic anhydrase and they are located in renal tubules.
Explanation:
Write the electron configuration for the metal in group 5A and the alkali metal in period 2
Will give brainliest if answered fast :)
Answer:
metal in group 5A is bismuth
electronic configuration : 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 5s^2 5p^6 4f^14 5d^10 6s^2 6p3
alkali metal in period 2 is lithium
1s^2 2s^ 1
Explanation:
NaC2H3O2 HOH --> HC2H3O2 NaOH Since the two products are a weak acid and a strong base, we expect this mixture to be basic. When NaF reacts with water in the same manner, the products would be NaOH and _______.
The products of the reaction would be NaOH and HF
From the question,
We are to determine the products of the reaction between NaF and water in the same manner as the given reaction.
To determine the other product, we will write the equation for the reaction
The equation for the reaction is
NaF + H₂O → NaOH + HF
Hence, the products of the reaction would be NaOH and HF.
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How much is the oxygen valency?
According to Dalton, atoms of different elements will be____________.
Answer:
The atoms of different elements vary in size and mass.
Explanation:
Convert 4.0 moles of krypton into liters of krypton.
Answer:
4.0 moles of krypton converts to 89.6L.
Explanation:
To convert moles to liters, remember that at standard temperature and pressure (STP), 1 mole is equal to 22.4 liters. Multiply your mole value - in this case, 4.0 - by the molar volume constant, 22.4L, to convert moles into liters. 4.0 x 22.4 is equal to 89.6, thus your answer is 89.6L.
We can check this by dividing 89.6 by 4.0, which will give us the molar volume constant 22.4L, proving that this answer is correct.
Why is fluorine more reactive than and bromine
Answer:
- The Valence/Bonding Electrons (whatever name you address them as) in Flourine are closer to the nucleus than the Valence/Bonding Electrons are in an atom of Bromine.
Explanation:
Hopefully this was helpful!
The reaction is at dynamic equilibrium.
N2 + 3H2 ⇌ 2NH3
Which statement is correct?
(1 point)
The solution has the same concentrations of nitrogen gas and ammonia.
The solution has the same concentrations of nitrogen gas and ammonia.
Nitrogen and hydrogen combine at the same rate that ammonia breaks down.
Nitrogen and hydrogen combine at the same rate that ammonia breaks down.
The solution has the same concentrations of nitrogen and hydrogen gases.
The solution has the same concentrations of nitrogen and hydrogen gases.
Both directions of the reaction have stopped.
Both directions of the reaction have stopped.
Considering the definition of dynamic equilibrium, the correct answer is second option: Nitrogen and hydrogen combine at the same rate that ammonia breaks down.
Chemical equilibrium is a state of a reaction in which no changes are observed as time passes, even though the reaction continues. That is, the chemical equilibrium is established when there are two opposite reactions that take place simultaneously at the same speed.
So, dynamic equilibrium is a chemical equilibrium, which occurs when two reversible processes happen at the same speed in both directions. In this way, the concentrations of the reactants and products remain constant over time.
In summary, the correct answer is second option: Nitrogen and hydrogen combine at the same rate that ammonia breaks down.
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https://brainly.com/question/25505273?referrer=searchResultsZn(s) + Cu2+ —> Zn2+(aq) + Cu(s)
In this reaction, copper __ electrons, therefore it is the __ agent.
A. loses, reducing
B. gains, oxidizing
C. loses, oxidizing
D. gains, reducing
Answer: do you guys know the answer
Explanation:
Answer:
gains,oxidizing
Explanation:
Zn(s) + Cu^2+---> Zn^2+(aq) + Cu(s)
I got the answer right on usatp.
The salt which in solution gives a pale green precipitate with sodium hydroxide solutionanda white precipitate with barium chloride solution is?
Answer:
Analytical Chemistry. The salt which in solution gives a pale green precipitate with sodium hydroxide solution and a white precipitate with barium chloride solution is : Iron (III) sulphate.
What allows us see the color green?
A
The green wavelength is absorbed.
B
The green wavelength is reflected.
C
All colors but green are reflected back.
D
The green wavelength vibrates the air particles.
Answer:
When (B) the green wavelength is reflected, we are able to see green.
I hope this helped at all.
In an electromagnetic spectrum, complimentary colors are absorbed and reflected , the color which is visible is the reflected color, hence the green wavelength is reflected which enables to see the color green.
What is electromagnetic spectrum?The electromagnetic spectrum consists of electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.
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chemical properties of sodium
Answer:
Density 0.97 g.cm -3 at 20 °C
Melting point 97.5 °C
Boiling point 883 °C
oxidation states +1, −1 (rare)
Explanation:
Have a nice day
A chemical reaction is when substance are changed into other substances.
True or False
Answer:
True
Explanation:
coz it is when one or more substances are mixed to produce one substance
Answer:
true
Explanation:
when its asking for a chemical reaction its asking for if it changed or had any effects like changing color or having weird effects on things it is mixed with or touches so its true