When excited, a sodium atom emits a photon of frequency 5.090x104s. What is t he energy associated with this emission? (A) 3.90x10-0 J (B) 3.90x10 48 J (C) 3.37x10-28 J (D) 3.37x10-19 J
Answers
When excited, a sodium atom emits a photon of frequency 5.090x104s. the energy associated with this emission is (D) 3.37 × 10^-19 J.
To calculate the energy associated with the emission of a photon, you can use the equation:
E = hf
where E is the energy, h is Planck's constant (approximately 6.626 × 10^-34 J·s), and f is the frequency of the photon.
Given the frequency of the emitted photon as 5.090 × 10^14 s^-1, we can substitute the values into the equation:
E = (6.626 × 10^-34 J·s) × (5.090 × 10^14 s^-1)
Calculating this expression will give us the energy associated with the emission:
E = 3.37 × 10^-19 J
Therefore, the correct answer is (D) 3.37 × 10^-19 J.
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Related Questions
draw lewis structures for the ethylene molecule ( c2h4 ), the chloromethane molecule ( c2hcl ), and the acetaldehyde molecule ( ch3cho ), and then answer the questions that follow.
Answers
The lewis structures of ethylene, chloromethane, and acetaldehyde are shown in the attached diagram below.
What is the lewis electron dot structure?Lewis structures can be described as diagrams that show the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule. A Lewis structure can possibly draw for any covalently bonded molecule and coordination compounds.
A lewis electron dot structure can be used to represent the total number of bonds, the different bonding atoms, and the lone pairs left in the atoms in the molecule.
Solid lines are used to show the bond between atoms that are bonded directly to one another and lone pairs of electrons are represented as dot pairs and are placed next to the atoms.
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Convert 2.2 tons to ounces.
a. Write the pathway.
b.
Solve the conversion problem.
Answers
Answer: Solve the conversion problem
Explanation: Because I feel like I can fix and do stuff like help people.
A ______ square is a diagram used to predict all possible allele combinations from a genetic ______. Using this diagram, the phenotypes of offspring can be determined from the genotypes.
Answers
Answer:
A Punnet Square...the second I am not sure.
Explanation:
Unfortunately the second could be many things. You'd have to have more background information.
Answer:
PUNNETT....,MAKE SURE U HAVE 2 T,s
Explanation:
punnett and cross
How many moles of carbon atoms are there in
5g of carbon?
Answers
Answer:
12 atoms of carbon
Explanation:
(6.023X10^23)/12 atoms of Carbon.
There are 0.42 moles of carbon atoms in 5g of carbon.
HOW TO CALCULATE NUMBER OF MOLES:The number of moles in a substance can be calculated by dividing the mass of the substance by its molar mass. That is;no. of moles = mass (g) ÷ molar mass (g/mol)
According to this question, the mass of carbon is 5g. The molar mass of carbon is 12g/mol.No. of moles = 5g ÷ 12g/mol
No. of moles = 0.42moles
Therefore, there are 0.42 moles of carbon atoms in 5g of carbon.
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Barium crystallizes in a body-centered cubic structure with a unit cell edge length of 584.28 pm. Calculate the atomic radius of barium in this structure. Report your answer with five significant figures.
Answers
The atomic radius of barium in a body-centered cubic structure is approximately 222.59 pm.
Given parameters:Edge length (a) = 584.28 pmIn a body-centered cubic structure, the relationship between the unit cell edge length and the radius of atoms in the structure is:r = (a√3)/(4)Where r = radius of the atoma = unit cell edge lengthThe formula above is gotten from considering the diameter of the body-centered cubic structure.
Since the atoms in the body-centered cubic structure touch each other at the center of the cube, the diameter of the atoms would be equal to the length of the diagonal of the unit cell multiplied by √3/4.Diagonal of the unit cell = a√3Therefore, diameter of the atom = a√3/4r = diameter/2r = (a√3)/(4*2)By substituting the values of a and simplifying, we have;r = (584.28 pm √3)/(4*2) = 222.59 pmTherefore, the atomic radius of barium in a body-centered cubic structure is approximately 222.59 pm.
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the rock's tendency to do this called
a. inertia
b. weight
c. acceleration
Answers
Answer:
a. inertia
Explanation:
Inertia means an object will continue its current motion until some force causes its speed or direction to change. The term inertia is properly understood as shorthand for "the principle of inertia" as described by Newton in his first law of motion.
is carbon oxygen double bond more polar than carbon carbon double bond
Answers
Yes, the carbon-oxygen double bond is more polar than the carbon-carbon double bond. Here are some details and explanations on why it is so A polar bond is a chemical bond where a pair of electrons is unequally shared between two atoms.
The unequal sharing of electrons results in the formation of two poles, a negative pole and a positive pole. The difference in the electronegativity of the bonded atoms determines the polarity of the bond. The greater the difference in electronegativity between the two bonded atoms, the more polar the bond is.What is the electronegativity of an atom?The electronegativity of an atom is its ability to attract a pair of electrons towards itself. The higher the electronegativity of an atom, the greater its ability to attract electrons.What is a double bond?A double bond is a type of chemical bond where two pairs of electrons are shared between two atoms.
The difference in electronegativity value has an implication on the polarity of the bond. The greater the difference in electronegativity, the more polar the bond is. In the case of carbon-oxygen double bond, the difference in electronegativity is 1.0, which means that the bond is more polar than the carbon-carbon double bond, which has a difference in electronegativity of 0. In summary, the carbon-oxygen double bond is more polar than the carbon-carbon double bond.
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349+1.10 + 100 =
and i have to put it in sig fig?
Answers
Which of the following solutions has the greatest concentration of hydroxyl ions [OH-]? Select one: a. lemon juice at pH 2 b. vinegar at pH 3 c: tomato juice at pH 4 d. urine at pH 6 e. seawater at pH 8
Answers
Answer: seawater at pH 8 has the greatest concentration of hydroxyl ions[OH-].Thus, option (c) is the correct answer.
Explanation:
When the pH value increases from 7 to 14,it represents increase in the OH- ion concentration.pH scale determines the acidity or basicity of the solution.The value below 7 represents that solution is acidic and above 7 represents that solutions is basic.
The pH of pure water at room temperature is 7.It means it is neither acidic nor basic,it is neutral.The pH value of Battery Acid is 0 which means it is highly acidic.The pH value of Liquid drain cleaner is 14 which means it is highly basic.
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If the cell potential is negative, which electrode is connected to the anode?.
Answers
Answer: Heyo Kenji Here! Here's your answer- In addition, since the external battery source is what drives the electrons through the circuit, the electrodes will match the positive and negative terminal of the battery. While the anode remains the site of oxidation, it becomes the positive terminal, and the cathode becomes the negative terminal.
Explanation: Hope this helps!
Have a nice day!
- Kenji ^^
Answer: In a galvanic (voltaic) cell, the anode is considered negative and the cathode is considered positive. This seems reasonable as the anode is the source of electrons and cathode is where the electrons flow. However, in an electrolytic cell, the anode is taken to be positive while the cathode is now negative.
Explanation: I hope this helps!
Can any element have a charge of -1, if not what element can?
Answers
No, but Group 1 elements can. Group 1 elements (alkali metals such as Li, Na, K...) all have one valence electron that they donate when forming ionic bonds. This will cause them to have a charge of +1.
Ariana is playing basketball with her friends. They are using an orange basketball. Why does her basketball look orange?
All visible light waves except orange are absorbed by the ball.
Only orange light waves are absorbed by the ball.
All visible light waves except orange are reflected by the ball
Only orange light waves reach the surface of the ball.
Answers
Ariana is playing basketball with her friends. They are using an orange basketball. Because all visible light waves except orange are absorbed by the ball.
The correct answer is A.
The color of an object is determined by the wavelengths of light that it reflects or absorbs.In the case of Ariana's basketball, it appears orange because it reflects orange light while absorbing other colors. When white light (which contains all visible colors) shines on the basketball, the orange light waves are reflected back to our eyes, while the other colors are absorbed by the ball. This selective absorption and reflection of light by the ball's surface result in us perceiving the basketball as orange in color.The correct answer is A.
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Carbon exists in many forms on Earth. The diagram below shows part of the carbon cycle. What is happening in Step 1? *
1 point
Captionless Image
Animals are decomposing and releasing carbon into the soil.
Animals are breaking down organic molecules and releasing carbon dioxide into the atmosphere.
Animals are releasing energy into the environment and storing carbon.
Animals are converting carbon dioxide from the atmosphere to oxygen.
Answers
The first step of carbon cycle is animals are breaking down organic molecules and releasing carbon dioxide into the atmosphere.
What is a carbon cycle?Carbon cycle completes into four steps: photosynthesis, decomposition, respiration, and combustion.
In the first step, carbon enter the environment by respiration, and in the second step, carbon dioxide is consumed by plants.
Thus, the correct option is B.
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Pls help meeeeee!!!!!
Answers
Answer:
Biodiesel
Plastic (PLA)
Paper towel
all are somewhat from natural origins
Calculate the concentrations of hydronium ion and hydroxide ion at 25°C in: (a) 0.10 M HCl, (b) 1.4 × 10–4 M Mg(OH)2, a strong base. answer with steps please
Answers
Ai. The concentration of hydronium ion, [H₃O⁺], is 0.10 M
Aii. The concentration hydroxide ion, [OH⁻] is 1×10⁻¹³ M
Bi. The concentration of hydronium, ion [H₃O⁺], is 3.57×10⁻¹¹ M
Bii. The concentration hydroxide ion, [OH⁻] is 2.8×10¯⁴ M
A. How do i determine [H₃O⁺] and [OH⁻] of 0.10 M HCl?i. The concentration of hydronium ion, [H₃O⁺] can be obtained as follow:
HCl(aq) + H₂O <=> H₃O⁺(aq) + Cl⁻(aq)
From the above equation,
1 mole of HCl contains 1 mole of H₃O⁺
Therefore,
0.10 M HCl will also contain 0.10 M H₃O⁺
Thus, the concentration of hydronium ion, [H₃O⁺] is 0.10 M
ii. The concentration of hydroxide ion, [OH⁻] can be obtained as follow:
Concentration of hydronium, ion [H₃O⁺] = 0.10 MConcentration hydroxide ion, [OH⁻] =?[H₃O⁺] × [OH⁻] = 10¯¹⁴
0.10 × [OH⁻] = 10¯¹⁴
Divide both side by 3.02×10⁻¹⁰
[OH⁻] = 10¯¹⁴ / 0.10
[OH⁻] = 1×10⁻¹³ M
Thus, concentration of hydroxide ion, [OH⁻] is 1×10⁻¹³ M
B. How do i determine [H₃O⁺] and [OH⁻] for 1.4×10¯⁴ M Mg(OH)₂?First, we shall obtain concentration hydroxide ion, [OH⁻]. Details below:
Mg(OH)₂(aq) <=> Mg²⁺(aq) + 2OH⁻(aq)
From the above equation,
1 mole of Mg(OH)₂ is contains 2 mole of OH⁻
Therefore,
1.4×10¯⁴ M Mg(OH)₂ will contain = 1.4×10¯⁴ × 2 = 2.8×10¯⁴ M OH⁻
Thus, concentration hydroxide ion, [OH⁻] is 2.8×10¯⁴ M
Now, we shall obtain the concentration of hydronium, ion [H₃O⁺]. Details below:
Concentration of hydroxide ion, [OH⁻] = 2.8×10¯⁴MConcentration of hydronium, ion [H₃O⁺] = ?[H₃O⁺] × [OH⁻] = 10¯¹⁴
[H₃O⁺] × 2.8×10¯⁴ = 10¯¹⁴
Divide both side by 2.8×10¯⁴
[H₃O⁺] = 10¯¹⁴ / 2.8×10¯⁴
[H₃O⁺] = 3.57×10⁻¹¹ M
Thus, the concentration of hydronium, ion [H₃O⁺], is 3.57×10⁻¹¹ M
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. 125g of water has an initial temperature of 25.6°C, and is heated by 50.0g of a metal
which has been heated to 115.0°C. The metal heats the water so that both the metal
and the water reach a final temperature of 29.3°C. Calculate the specific heat of the
metal.
Answers
Answer : The specific heat of the metal is, \(0.451J/g^oC\)
Explanation :
In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.
\(q_1=-q_2\)
\(m_1\times c_1\times (T_f-T_1)=-m_2\times c_2\times (T_f-T_2)\)
where,
\(c_1\) = specific heat of metal = ?
\(c_2\) = specific heat of water = \(4.18J/g^oC\)
\(m_1\) = mass of metal = 50.0 g
\(m_2\) = mass of water = 125 g
\(T_f\) = final temperature of mixture = \(29.3^oC\)
\(T_1\) = initial temperature of metal = \(115.0^oC\)
\(T_2\) = initial temperature of water = \(25.6^oC\)
Now put all the given values in the above formula, we get
\((50.0g)\times c_1\times (29.3-115.0)^oC=-[(125g)\times 4.18J/g^oC\times (29.3-25.6)^oC]\)
\(c_1=0.451J/g^oC\)
Therefore, the specific heat of the metal is, \(0.451J/g^oC\)
What is the speed of a car that covers 250 miles in 5 hours?
Answers
5hours is time
Speed = distance/time
Speed = 250/5
Speed =50miles per hour
50mph
Hope that helps :)
in anova, the null hypothesis is ________. group of answer choices h0: σ12 = σ22 = σ32 h0: σ12 ≠ σ22 ≠ σ32 h0: μ1 = μ2 = μ3 h0: μ1 ≠ μ2 ≠ μ3
Answers
The null hypothesis in ANOVA is: h0: μ1 = μ2 = μ3.
In ANOVA (Analysis of Variance), the null hypothesis states that there is no significant difference in the means of the different groups being compared. In this case, μ1, μ2, and μ3 represent the population means of the three groups under investigation. The null hypothesis assumes that the means of all the groups are equal.
When conducting ANOVA, the alternative hypothesis (not mentioned in the question) would typically state that at least one of the population means is different from the others. However, the null hypothesis assumes that there is no difference and any observed variations in the sample means are due to random chance.
To determine if the null hypothesis can be rejected, ANOVA calculates the F-statistic, which compares the variability between the groups with the variability within the groups. If the F-statistic is large enough to reject the null hypothesis, it suggests that at least one of the population means is significantly different from the others.
It is important to note that the specific null hypothesis mentioned in the question assumes equality of means for three groups (μ1, μ2, and μ3). The null hypothesis may be different when comparing more or fewer groups, but the underlying principle remains the same.
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If the lungs do not function to eliminate sufficient CO2, which of the following might you expect to occur? Hemoglobin proteins in the red blood cells will become less protonated. Serum bicarbonate levels will increase. Respiratory alkalosis will occur. Metabolic acidosis will occur O O
Answers
If the lungs do not function to eliminate sufficient CO2, you might expect Serum bicarbonate levels to increase.
When the lungs do not eliminate enough CO2 from the body, the concentration of CO2 in the blood increases. An increase in CO2 in the blood results in a decrease in blood pH. To compensate for the decreased pH, the kidneys produce and retain more bicarbonate ions in the blood.
Bicarbonate acts as a base and can help to neutralize the excess H+ ions in the blood.The amount of bicarbonate in the blood is regulated by the kidneys. When the kidneys detect an increase in H+ ions in the blood, they produce and retain more bicarbonate ions.
Similarly, when the kidneys detect a decrease in H+ ions in the blood, they excrete more bicarbonate ions. This helps to maintain the pH of the blood within a narrow range, which is necessary for the proper functioning of the body.
Hence, if the lungs do not function to eliminate sufficient CO2, Serum bicarbonate levels will increase.
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What is the unit of measurement for potential electric energy existing between two points on a circuit?
A. Joule
B. Voltage
C. Current
Answers
It is Joules/Coulombs which is the same thing as Voltage.
if the salinity of a sample of seawater is 33 parts per thousand, what will be the ratio of chloride to sodium to sulfate?
Answers
The average composition of the principal ions can be used to estimate the ratio of chloride, sodium, and sulfate in seawater.
Chloride, salt, and sulfate are among the most prevalent dissolved ions in seawater, which also contains other dissolved ions. Based on the weight concentration of each ion, it is possible to determine the ratio of chloride to sodium to sulfate in a seawater sample with a salinity of 33 parts per thousand.
We may calculate the ratio of chloride to sodium to sulfate in seawater with a salinity of 33 parts per thousand to be roughly 1.77:2.57:0.08 by weight or 1.77:2.57:0.08 by mole using the density of seawater and the average composition of main ions. This means that there are roughly 2.57 grams of sodium and 0.08 grams of sulfate in saltwater for every 1.77 grams of chloride.
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Who was the first person to introduce the concept of atomic mass?
Answers
Olfactory nerves pass through foramina in the crista galli of the sphenoid. Answer 1: crista galli Answer 2: sphenoid
Answers
That is incorrect. The olfactory nerves pass through foramina in the cribriform plate of the ethmoid bone, not the crista galli of the sphenoid bone.
The cribriform plate is a part of the ethmoid bone located in the anterior cranial fossa, and it contains numerous small openings called olfactory foramina through which the olfactory nerves pass.
The ethmoid bone is a delicate, sponge-like bone located between the nasal cavity and the brain. It consists of two lateral masses and a central vertical plate called the perpendicular plate. The cribriform plate is a thin, horizontal part of the ethmoid bone that forms the roof of the nasal cavity.
Within the cribriform plate, there are multiple tiny foramina known as olfactory foramina. These foramina allow the passage of the olfactory nerve fibers, which are responsible for transmitting the sense of smell from the olfactory epithelium in the nasal cavity to the olfactory bulb in the brain.
So, to clarify, the olfactory nerves pass through foramina in the cribriform plate of the ethmoid bone, not the crista galli of the sphenoid bone. It's important to have accurate anatomical knowledge, especially when studying or discussing the cranial nerves and their pathways.
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What is heterogenous mixture
Answers
Answer:
A heterogeneous mixture is simply any mixture that is not uniform in composition - it's a non-uniform mixture of smaller constituent parts. By contrast, a mixture that is uniform in composition is a homogeneous mixture.
A gas mixture has three components: N2, F2, and He. Their partial pressures are 0.50 atm, 0.16 atm,
and 0.18 atm, respectively. What is the pressure of the gas mixture?
Enter your answer in the provided box.
atm
Answers
Answer:
What????????????????????????????
Explanation:
???
Classify each organic compound based on the functional group it contains.
ether
carboxylic acid
ester
alcohol
Molecular Structure
Type of Compound
I-O-I
Η Ο
1 10
C-C-0-H
1
H
H
-I
H
II
H
1
H-C
1
H
H
1
-C
1
H
1
H
1
H
1
H
H
I
H-C
1
H
H H
I
C-0-C-H
1
1
H H
1
H-CC-O-H
1
H H
Answers
Answer:
H2C2O1
Explanation:
Answer:
Carboxylic Acid
Ester
Ether
Alcohol
Explanation:
Which statement is true for one molecule of sulfur trioxide?
A.
There are three atoms of sulfur and one atom of oxygen.
B.
There are three atoms of sulfur and three atoms of oxygen.
C.
There is one atom of sulfur and one atom of oxygen.
D.
There is one atom of sulfur and three atoms of oxygen.
Answers
The correct option is D, in sulfur trioxide there is one atom of sulfur and three atoms of oxygen.
Sulfur trioxide has a chemical formula \(SO_{3}\) which clearly signifies one atom of sulfur and three atoms of oxygen.
In the case of option B: three atoms of sulfur and one atom of oxygen, do not make the chemical composition \(SO_{3}.\) Hence option B is incorrect.
In the case of option C: one atom of sulfur and one atom of oxygen, do not make the chemical composition as \(SO_{3}.\). Hence option C is incorrect.
In the case of option D: one atom of sulfur and three atoms of oxygen, do not make the chemical composition \(SO_{3}.\) Hence option D is incorrect.
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Detergent is an example of what type of compound?
A.) synthetic organic compound
B.) organic compound
C.) chlorofluorocarbon
Answers
Answer : A
Explanation : Surface-active compounds/agents (surfactants) Substances which have the effect of reducing the surface tension of a solvent, an example being a detergent/surfactant or soap dissolved in water. ... Both synthetic detergents and soaps are surfactants. Surfactants See "Surface-active compounds/agents".
According to the context, a detergent is an example of a synthetic organic compound.
What is a detergent?They are a group of synthetic organic compounds that have the property of lowering the surface tension of the liquids in which they are dissolved.
These contain surfactant substances that help in penetration, soaking, emulsification, dispersion, solubilization.
Therefore, we can conclude that according to the context, a detergent is an example of a synthetic organic compound.
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Give me lil reasoning so I know your not lying for points
:(
(I’ll mark you as brainlister )
Answers
Answer:
C. Tip had the lower pressure, it was 652.71mmHg
Explanation:
To answer this question you need to convert both values into a common unit so you can compare directly.
87kPa = 652.71 mmHg
y
Why is helium
monoatomic in nature?
Answers
Answer:
Nitrogen stands out because its atoms share a strong triple bond, making it a very stable substance. The noble gases, such as helium and neon, rarely form molecules at all; they are monatomic.
Explanation:
Answer:
Noble gases are monoatomic because they have complete octet (apart from Helium, which has duet) , hence they are highly stable on their own and do not react with others to form compounds in standard temperature and pressure conditions. ... All the electron shells in the noble gasses are full of electrons.