The energy released in the alpha decay of ²³⁸U is approximately 5.99 x 10⁻¹¹ joules. Approximately 1.81 x 10⁻⁷ of the mass of a single ²³⁸U is converted to energy in the decay.
a) To calculate the energy released in the α decay of ²³⁸U, we can use Einstein's mass-energy equivalence principle, expressed by the equation:
E = Δmc²
Where:
E is the energy released
Δm is the change in mass
c is the speed of light in a vacuum (approximately 3.00 x 10⁸ m/s)
The change in mass (Δm) can be calculated by subtracting the mass of ²³⁴Th from the mass of ²³⁸U:
Δm = Mass of ²³⁸U - Mass of ²³⁴Th
Δm = 238.050784 u - 234.043593 u
Δm ≈ 4.007191 u
Converting the mass change to kilograms:
Δm = 4.007191 u * 1.66053906660 x 10⁻²⁷ kg/u
Δm ≈ 6.653531 x 10⁻²⁷ kg
Now, we can calculate the energy released using the equation:
E = Δmc²
E = (6.653531 x 10⁻²⁷ kg) * (3.00 x 10⁸ m/s)²
E ≈ 5.99 x 10⁻¹¹ J
Therefore, the energy released in the α decay of ²³⁸U is approximately 5.99 x 10⁻¹¹ joules.
b) To calculate the fraction of the mass of a single ²³⁸U converted to energy in the decay, we can use the equation:
\(Fraction = \frac{Energy\ released}{Mass\ of\ ^{238}U} \times c^2\)
Converting the mass of ²³⁸U to kilograms:
Mass of ²³⁸U = 238.050784 u * 1.66053906660 x 10⁻²⁷ kg/u
Mass of ²³⁸U ≈ 3.95 x 10⁻²⁵ kg
Now we can calculate the fraction:
\(Fraction = \frac{5.99 \times 10^{-11} \text{ J}}{3.95 \times 10^{-25} \text{ kg}} \times (3.00 \times 10^8 \text{ m/s})^2\)
Fraction ≈ 1.81 x 10⁻⁷
Therefore, approximately 1.81 x 10⁻⁷ of the mass of a single ²³⁸U is converted to energy in the decay.
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Complete question :
a) Calculate the energy released in the α decay of ²³⁸U. The mass of ²³⁸U is 238.050784 u, and the mass of ²³⁴Th is 234.043593 u.
b) What fraction of the mass of a single ²³⁸U is converted to energy in the decay
Which particles are transferred during a redox reaction
Answer:
Most oxidation-reduction (redox) processes involve the transfer of oxygen atoms, hydrogen atoms, or electrons, with all three processes sharing two important characteristics: (1) they are coupled—i.e., in any oxidation reaction a reciprocal reduction occurs, and (2) they involve a characteristic net chemical change— .
Electrons will be transferred during redox reaction.
What is electron?The electron is subatomic particles which are placed in surrounding the nucleus. Electrons carry negative charge.
What is redox reaction?Redox reaction involve the transfer of electrons between intermediates. A redox reaction occurs when the oxidation states of the substrate change. The removal of electrons or even a rise in the oxidation state of such a chemical or its atoms is referred to as oxidation. The acquisition of electrons or a lowering in the oxidation number of a chemical or the atoms inside it is referred to as reduction.
Hence the answer will be electron
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Which element is most likely the best conductor of heat?
Responses
C
Cl
P
As
how do we separate cork and lead
Answer:
water exposure because it extracts millennials which is a product
7. The mass of a sample of Co, is 91.72 g. How many molecules does it contain?
Answer:
9.370 x 10 to the 23 molecules
Explanation:
91.72/1 x 1 mole Co/58.933g x 6.02 x 10 to the 23/1 mole Co
Answer:
Explanation:
Mass 1 mole of CO
C = 12
O = 16
m = 28
Mols of 91.72 grams
m = given Mass / Molar Mass
m = 91.72 / 28
m = 3.28 mols
Molecules
1 mol of anything is 6.02 * 10^23 molecules (in this case)
3.28 mol of CO = x
1/3.28 = 6.02*10^23/x Cross multiply
x = 3.28 * 6.02 * 10^23
x = 1.97 * 10^24
Which is most likely a physical change? A. cutting a substance into four pieces or B. burning a substance into ash and smoke or C. reacting a substance chemically to form a new substance or D. combining a substance with water to make rust
Answer:
A. cutting a substance into four pieces
Explanation:
The others include burning, reacting, and rust which make up a chemical change.
Cutting a substance into four pieces indicates a physical change. The correct option is A.
What is physical change?Even before to and after a physical change, the material implicated is unique architectural the same.
Physical changes include texture, shape, heat, and the beginning of a change in the state of matter. The texture of a substance influences how it feels.
A physical change is simply a change in appearance. The situation has not changed since the change.
Physical change can be seen in the use of cutting paper, melting butter, dissolving salt in water, and breaking glass.
Chemical reaction takes place when bonds among molecules or atoms are broken or formed.
This implies that one material with a specific set of properties is transformed into another substance with a different set of properties.
Thus, the correct option is A.
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using postulates of kinetic molecular theory, select the statement(s) that correctly describe(s) the assumptions used to define an ideal gas as distinct from a real gas. multiple select question. gas particles are separated by relatively large distances. the actual volume of the gas particles is negligible compared to the container volume. gas particles do not exert attractive or repulsive forces on one another.
Particles in a gas do not interact with one another via either attracted or repulsive forces.
When compared to the volume of the container, the real volume of the gas particles is very tiny.
Because of their microscopic size, the particles take up a little amount of space in comparison to the volume that the gas occupies. There is no interaction between the particles. There are no forces that can be described as attracting or repulsive between them. The temperature has a direct relationship with the average kinetic energy of the particles in the gas.
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In a gas, there are no interactions between the particles due to either attracted or repellent forces.
The actual volume of the gas particles is negligible compared to the container volume.
The actual volume of the gas particles is incredibly little when compared to the volume of the container. The microscopic size of the particles means that they only occupy a small portion of the volume that the gas does. The particles don't interact with one another. Between them, there are no forces that can be defined as attracting or repelling. The average kinetic energy of the gas's particles is directly related to temperature.
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substance q had a vapor pressure of 345 mmhg at 22.00c. what's the temperature at a vapor pressure of 275 mmhg? the heat of vaporization of q is 36.0 kj/mol.
Substance q had a vapor pressure of 345 mmHg at 22.00°C. Then 19.6° C is the temperature at a vapor pressure of 275 mmHg.
As stated in the Clausius-Clapeyron equation:
ln ( P2 / P1 ) = - ΔH / R ( 1 / T2 - 1 / T1 )
∴ ln ( 275 / 345 ) = - 36 / 8.314 (1 / T2 - 1 / 295)
∴ - 0.235 = - 4.33 ( 295 - T2 / 295 T2 )
∴ 15.98 T2 = 295 - T2
∴ 14.98 T2 = 295
∴ T2 = 19.6 °C
So, The temperature is 19.6 °C at vapor pressure of 275 mmHg.
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why can dogs not eat chocolate
Which refers to a method that relies on sound waves and is used by different animal species for navigation,
communication, and finding food?
echolocation
analog signaling
infrared detection
o digital location
HELP FAST ILL MARK BRAINLEST
Answer:
A
Explanation:
got it on edge
An echolocation refers to a method that relies on sound waves and is used by different animal species for navigation, communication, and finding food. Therefore, option A is correct.
What is an echolocation ?Echolocation is a method used by bats, dolphins, and other animals to locate objects using reflected sound. This enables the animals to move around in complete darkness, allowing them to navigate, hunt, recognize friends and enemies, and avoid obstacles.
(1) To hunt for prey, bats make high-frequency sounds. (2) Sound waves are used by dolphins and other toothed whales to locate prey and navigate their surroundings. (3) Nocturnal oil birds use echolocation to navigate their surroundings, particularly in low-light conditions.
Echolocation is used to help with orientation, obstacle avoidance, food acquisition, and social interactions.
Thus, option A is correct.
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What are five different types of air pollutant each
Simple Coase/ Complex Coase The demand for mushrooms from one farm is Qd=21-(1/5)P. The cost to this farmer of producing his mushrooms is TPC=9Q+(3/2)Q2. But growing mushrooms often causes a smell that disturbs neighbors. The bother to neighbors is TD=12Q+2Q2. (Q= unit of mushrooms) 1. If the mushroom farmer does not take the bad smell imposed on his neighbors into account, how units of mushrooms will he produce? What is the NPB for the farmer? What is the NSB for society? 2. What is the optimal number of units of mushrooms (for society) from this farm? What is the NPB for the farmer at this optimal number? What is the NSB for society at this optimal number? 3. Suppose there are no transactions costs (negotiations between the farmer and neighbors are easy and free) and a judge rules that the farmer is not allowed to bother neighbors without their permission. How many units of mushrooms will be produced? How does this happen? Explain. (What is the exact net benefit for the farmer? What is the exact net benefit for the neighbors?) 4. Suppose there are no transactions costs and a judge rules that the farmer is allowed to produce as much bad smell as he wants. How many units of mushrooms will be produced? How does this happen? Explain. (What is the exact net benefit for the farmer? What is the exact net benefit for the neighbors?)
The exact net benefit for the farmer (NPB) is: NPB = - (3/2)Q^2 - 6Q = -18
The exact net benefit for the neighbors is: Net Benefit for Neighbors = -TD = - (12Q + 2Q^2) = -80
1. If the mushroom farmer does not take the bad smell imposed on his neighbors into account, he will produce the quantity of mushrooms where his marginal cost equals his marginal revenue. To find this quantity, we equate the marginal cost (MC) to the marginal revenue (MR):
MC = TPC' = 9 + 3Q
MR = Qd = 21 - (1/5)P
Setting MC = MR:
9 + 3Q = 21 - (1/5)P
Solving for Q, we get:
Q = 4
The Net Private Benefit (NPB) for the farmer is the difference between the total revenue (TR) and the total cost (TC):
NPB = TR - TC = P * Q - TPC = PQ - (9Q + (3/2)Q^2) = - (3/2)Q^2 - 6Q
The Net Social Benefit (NSB) for society is the difference between the total benefit (TB) and the total cost (TC):
NSB = TB - TC = TD - TPC = (12Q + 2Q^2) - (9Q + (3/2)Q^2) = - (1/2)Q^2 + 3Q
2. The optimal number of units of mushrooms for society occurs where the social marginal benefit (SMB) equals the social marginal cost (SMC). To find this quantity, we equate the marginal benefit (MB) to the marginal cost (MC):
MB = Qd = 21 - (1/5)P
MC = TPC' = 9 + 3Q
Setting MB = MC:
21 - (1/5)P = 9 + 3Q
Solving for Q, we get:
Q = 4
The NPB for the farmer at this optimal number is:
NPB = - (3/2)Q^2 - 6Q = -18
The NSB for society at this optimal number is:
NSB = - (1/2)Q^2 + 3Q = 6
3. In a situation without transaction costs and a ruling that the farmer is not allowed to bother neighbors without their permission, the farmer will produce the quantity of mushrooms that maximizes his net private benefit (NPB). This occurs at the quantity where the marginal cost (MC) equals the marginal private benefit (MPB) for the farmer:
MC = TPC' = 9 + 3Q
MPB = Qd = 21 - (1/5)P
Setting MC = MPB:
9 + 3Q = 21 - (1/5)P
Solving for Q, we get:
Q = 4
The exact net benefit for the farmer (NPB) is:
NPB = - (3/2)Q^2 - 6Q = -18
The exact net benefit for the neighbors is:
Net Benefit for Neighbors = -TD = - (12Q + 2Q^2) = -80
4. In a situation without transaction costs and a ruling that the farmer is allowed to produce as much bad smell as he wants, the farmer will produce the quantity of mushrooms that maximizes his net private benefit (NPB). This occurs at the quantity where the marginal cost (MC) equals the marginal private benefit (MPB) for the farmer:
MC = TPC' = 9 + 3Q
MPB = Qd =
21 - (1/5)P
Setting MC = MPB:
9 + 3Q = 21 - (1/5)P
Solving for Q, we get:
Q = 4
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Which beaker has the least thermal energy?
A. Beaker D
B. Beaker A
C. Beaker B
D. Beaker C
Answer:
________________________________
✏️ QUESTION:which doctor has the least thermal energy?
A. beaker D
B. beaker A
C.beaker B.
D. beaker C
________________________________
✏️ ANSWER:A. beaker D..
________________________________
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The reaction A( g ) ⇌ 2 B( g ) A(g) ⇌ 2 B(g) has an equilibrium constant of K = 0.010 K = 0.010. What is the equilibrium constant for the reaction B( g ) ⇌ 1 2 A( g ) ?
Answer:
K = 10
Explanation:
Using Hess's law, it is possible to obtain the equilibrium constant, K, of a reaction using K of similar reactions. For example:
If A ⇄ B K = X
B ⇄ A K = 1/X
2A ⇄ 2B K = X².
Thus, if A(g) ⇄ 2B(g) K = 0.010
2B(g) ⇄ A(g) K = 1 / 0.010; K = 100
B(g) ⇄ A(g) K = √100 = 10
K = 10what type of plot can be used to determine λ max of a solution?
a. Absorbance vs. concentration b. Absorbance Vs; volume c. Absorbance vs wavelength d. Absorbance VS. transmittance
The type of plot that can be used to determine λ max of a solution is Absorbance vs wavelength.
The correct option is C.
What is the plot of Absorbance vs wavelength?The plot of absorbance vs wavelength is called an absorption spectrum or an absorbance spectrum.
In this plot, the x-axis represents the wavelength of light, usually in nanometers (nm), and the y-axis represents the absorbance of the sample at that particular wavelength. The absorbance is a measure of how much light is absorbed by the sample at a specific wavelength.
The absorption spectrum is used to identify the wavelengths at which a substance absorbs light and can be used to determine the identity or concentration of the substance. The pattern of peaks and troughs in the absorption spectrum is unique to each substance, making it a useful tool in analytical chemistry and biochemistry.
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Classify NH3 as a strongbase or a weak base.Strong BaseWeak Base
ANSWER
EXPLANATION
Ammonia (NH3) is a base that does not contain hydroxyl ion but dissolved in water to produce ammonium ion and hydroxyl ion.
Recall, that pH scale is one of the tool used in determining a strong base and a weak base
The pH of ammonia is 11 and this make ammonia (NH3) to fall under the category of weak base
Therefore, ammonia is a weak base
when a non-volatile solute is added to a volatile solvent, the vapor pressure of the solvent is reduced. why?
when a non-volatile solute is added to a volatile solvent, the vapor pressure of the solvent is reduced Because solute molecules occupy some of the surface sites. As a result, there is less room for the solvent molecule to vaporise.
nonvolatile solute is a material that doesn't vaporise easily. Furthermore, when dissolved into a solvent, it has no impact on the solution's vapour pressure. What exactly is indeed a nonvolatile liquid? Volatile and non - volatile liquids have a low moisture content and a large melting point. Non-volatile substances involve: Non-volatile substances are those that don't vaporise quickly. At normal room temperature and pressure, they don't have a higher vapour pressure. At ambient temperature, nonvolatile substances are mostly solids. Dissolved compounds include sodium chloride and silver nitrate. Water, with a boiling temperature of 100 degrees Celsius, is an excellent example of a non-volatile liquid. This is due to the influence of strong hydrogen bonds between molecules of water, as previously discussed. Mercury is a non-volatile liquid as well.
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A 14.00 g sample of hydrate copper(II) sulfate, CuSO4 * nH2O, is heated to drive off the water. 5.051 g of H2O was released from the sample. What is the value of "n" in the hydrate formula
The value of "n" in the hydrate formula CuSO4 * nH2O is 5.
To determine the value of "n," we need to calculate the molar ratio between the released water and the hydrate copper(II) sulfate.
First, we need to convert the mass of water released to moles. The molar mass of water (H2O) is approximately 18.015 g/mol. Therefore, 5.051 g of water is equal to 5.051 g / 18.015 g/mol ≈ 0.2804 mol.
Next, we calculate the molar ratio between water and copper(II) sulfate. The molar mass of copper(II) sulfate (CuSO4) is approximately 159.609 g/mol. From the balanced chemical equation, we know that one mole of copper(II) sulfate is associated with "n" moles of water.
Assuming that the molar ratio is 1:1 between CuSO4 and H2O, we can set up the following equation:
0.2804 mol H2O = 14.00 g CuSO4 * (1 mol H2O / (159.609 g CuSO4 * n))
By rearranging the equation, we can solve for "n":
n = 14.00 g CuSO4 / (159.609 g CuSO4/mol) = 0.0877 mol
Since "n" represents the number of water molecules, it must be a whole number. Therefore, the closest whole number to 0.0877 is 5.
Therefore, the value of "n" in the hydrate formula CuSO4 * nH2O is 5.
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A 2 kg mass is spun on a string in a horizontal circular path at a constant speed. if the
radius of the path is 0.5 m and the period of revolution is 0.25 s, what is the speed of the
mass?
The speed of the mass is 12.57m/s
The speed of a mass that is spinning in a horizontal circular path can be determined using the relationship between speed, radius, and period of revolution.
The speed of an object in a circular path is given by the formula:
Speed = 2 * pi * radius / period
In this case, we know that the radius of the path is 0.5 m and the period of revolution is 0.25 s, so we can substitute those values into the formula:
Speed = 2 * pi * 0.5 m / 0.25 s
The speed of the mass would be:
Speed = 4 * pi m/s = 12.57m/s
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Which of the following best describes why atoms are inherently neutral? A. They have an equal number of charged and neutral subatomic particles B. They have neutrons C. They have an equal number of protons and electrons D. They have an equal number of protons and neutrons
The correct answer is C. Atoms are inherently neutral because they have an equal number of protons and electrons.
Protons, which carry a positive charge, are located in the nucleus of an atom, while electrons, which carry a negative charge, orbit around the nucleus at specific energy levels. The number of protons determines the atomic number of an element, while the number of electrons is equal to the number of protons in a neutral atom.
Since the charges of protons and electrons are equal in magnitude but opposite in sign, the positive charge of the protons is balanced by the negative charge of the electrons. This equal distribution of positive and negative charges results in a neutral overall charge for the atom.
Option A is incorrect because it implies the existence of "neutral subatomic particles," which is not a recognized concept. Option B is incorrect because the presence of neutrons, which have no charge, does not directly contribute to the atom's neutrality. Option D is incorrect because it refers to the balance between protons and neutrons, which is related to the atomic mass but not the overall charge of the atom.
Therefore, the correct option is C.
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In an experiment, the scientist has developed the following hypothesis: "If
I add salt to water, it will prevent it from freezing."
In this experiment, the amount of salt in the water is a
test
O variable
O hypothesis
O observation
Answer:
variable
Explanation:
Which of the following describes a compound?
A.
a piece of pure carbon, containing only carbon atoms
B.
oxygen gas surrounding a solid piece of carbon
C.
a substance made of two oxygen atoms for each carbon atom
D.
carbon and oxygen atoms mixed without being bonded together
Answer:
Explanation:
D.
carbon and oxygen atoms mixed without being bonded together
Suppose that you run a reaction in ethanol to form a very non-polar organic substance. How would you extract your product?
Select one:
a- After the reaction is complete, add water and ethanol to a separatory funnel and separate the layers.
b- After the reaction is complete, rotovap the ethanol and redissolve in suitable organic solvent and water followed by separation.
c- After the reaction is complete, add suitable organic solvent and water followed by separation.
d- There is more than one correct answer.
The correct answer for extracting a very non-polar organic substance from a reaction run in ethanol is
option b - After the reaction is complete, rotovap the ethanol and redissolve in suitable organic solvent and water followed by separation.
Here you use a rotovap to remove the ethanol and then redissolve the product in a suitable organic solvent and water, followed by separation. This method effectively removes the ethanol, which is polar and allows for the separation of the non-polar product using an appropriate organic solvent. Option a and c also may work as they both involve separating the layers using an immiscible solvent and water, but option b is the best choice for the non-polar compound.
Option d is incorrect as there is only one correct answer.
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Consider the following reaction, where A and
E are hypothetical elements.
A + 3E --> AE3
The atomic mass of A is 42.1 amu.
The atomic mass of E is 56.2 amu.
If 42.6 g of A fully reacts, how many grams of
AE3 are expected to form?
Enter your numerical answer to 1 decimal
place. Do not include the units of "g".
Answer:
Enter your numerical answer to 1 decimal place. Do not include the units of "g". Question: Question 14 1 pts Consider the following reaction, where A and E are hypothetical elements. A+3E --> AE The atomic mass of A is 42.1 amu. The atomic mass of Eis 56.2 amu. If 42.6 g of A fully reacts, how many grams of AE, are expected to form?
. Balance the equations and identify the type of reaction. (48 points total: 6 points per question=2
points per reaction type and 4 points for the coefficients)
a. ___Na3N → ___Na + ___N2 Reaction Type:
b. ___H3PO4 + ___KOH → ___K3PO4 + ___H2O Reaction Type:
c. ___N2 + ___H2 → ___NH3 Reaction Type:
d. ___H2O2 → ___ O2 + ___ H2O Reaction Type:
e. ___Zn+ ___HCl → ___ZnCl2 + ___ H2 Reaction Type:
f. ___C2H6 + ___O2 → ___ CO2 + ___H2O Reaction Type:
g. ___CuCl2 + ___ H2S → ___CuS + ___HCl Reaction Type:
h. ___N2 + ___ O2 → ___ N2O5 Reaction Type:
The balanced equation of the reaction and the reaction types are given below as follows:
a. 2 Na₃N → 6 Na + N₂ Reaction Type: decomposition reaction
b. H₃PO₄ + 3 KOH → K₃PO₄ + 3 H₂O Reaction Type: Neutralization reaction
c. N₂ + 3 H₂ → 2 NH₃ Reaction Type: Synthesis
d. 2 H₂O₂ → O₂ + 2 H₂O Reaction Type: Decomposition
e. Zn+ 2 HCl → ZnCl₂ + H₂ Reaction Type: single displacement
f. 2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O Reaction Type: Combustion
g. CuCl₂ + H₂S → CuS + 2 HCl Reaction Type: Double displacement
h. 2 N₂ + 5 O2 → 2 N₂O₅ Reaction Type: Synthesis
What are chemical reactions?Chemical reactions are reactions that result in the formation of new substances as a result of chemical changes that occur in the substances undergoing the reaction.
In a chemical reaction, the substances that undergo chemical changes are called reactants while the new substances that are formed are called products.
A balanced equation of a chemical reaction is one in which the moles of atoms of reactants are equal to the moles of atoms of the products involved in the reaction.
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How many grams of potassium hydroxide (KOH), exist in 12.50 X 1019 molecules of KOH?
1.343 x 10²³ grams of potassium hydroxide (KOH), exist in 12.50 X 1019 molecules of KOH.
What does Avogadro's number mean?The quantity of units in one mole of any substance is called the Avogadro number, also referred to as the Avogadro constant. The comparable number is 6.0221408571023. The units may be electrons, ions, atoms, or molecules, depending on the type of reaction occurring and the substance being utilized. Two gases of the same volume have the same number of molecules when they are at the same temperature and pressure, according to Amedeo Avogadro.
Given:
0.2228 mol of potassium hydroxide in 12.50 X 1019 molecules of KOH
Hence in one mole, there is Avogadro number of molecules
i.e. 6.023 × 10²³ molecules.
no of atoms = 0.223 x 6.023
= 1.343 x 10²³
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what do the water, carbon and nitrogen cycle have in common?
Answer:
The three main cycles of an ecosystem are the water cycle, the carbon cycle and the nitrogen cycle. These three cycles working in balance are responsible for carrying away waste materials and replenishing the ecosystem with the nutrients necessary to sustain life.
Explanation:
:)
Given the speed of light as 3.0 ✕ 108 m/s, calculate the wavelength of the electromagnetic radiation whose frequency is 6.700 ✕ 1012 Hz.
Answer:
Wavelength = \(4.48*10^{-5}m\)
Explanation:
Given the following data;
Speed of light, V = 3 * 10^{8}m/s
Frequency, F = 6.700 * 10^{12}Hz.
To find the wavelength
We know that that the speed of light is given by the formula;
\( Speed of light, V = wavelength * frequency \)
Making wavelength the subject of formula, we have;
\( Wavelength = \frac {speed \; of \; light}{frequency} \)
Substituting into the equation, we have;
\( Wavelength = \frac {3 *10^{8}}{6.700 ✕ 10^{12}} \)
Simplifying the equation, we have;
Wavelength = 4.48*10^{-5} m
Therefore, the wavelength of the electromagnetic radiation is \(4.48*10^{-5} meters\)
experiment 1: what was the absorbance of the copper(ii) sulfate solution at 700 nm? select the closest answer. 0.517 0.034 1.320 0.351
To determine the absorbance of a copper(II) sulfate solution at 700 nm, you would need to conduct a spectrophotometric experiment.
Here's a step-by-step explanation:
1. Prepare a copper(II) sulfate solution with a known concentration. Copper(II) sulfate is a blue compound that forms a colored solution when dissolved in water.
2. Turn on the spectrophotometer and set the wavelength to 700 nm. A spectrophotometer is an instrument that measures the amount of light absorbed by a solution at a specific wavelength.
3. Calibrate the spectrophotometer using a blank (typically distilled water) to set the absorbance to zero.
4. Fill a cuvette with the copper(II) sulfate solution, and place it in the spectrophotometer.
5. Record the absorbance reading displayed by the spectrophotometer.
Unfortunately, without the actual data from the experiment, it's not possible for me to select the closest answer among the options you provided (0.517, 0.034, 1.320, 0.351). The absorbance value would depend on the specific concentration of the copper(II) sulfate solution used and the spectrophotometer's calibration.
However, you can follow the steps above to conduct the experiment and obtain the absorbance value yourself. Good luck!
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Molecules are
Group of answer choices
2 elements bound together
2 atoms bound together
2 or more atoms mixed together
2 or more atoms bound together
5. A gas tank for a barbecue has a volume of 25 liters. What is the volume of the tank if the pressure changed from 10 atm to 15 atm? Boyle’s law
The volume of the tank if the pressure changed will be 16.7 liters.
State Boyle’s law
This law states that, at a constant temperature, the pressure of a particular gas quantity varies inversely with its volume. Boyle's law can also be referred to as Mariotte's law. It is a relation that talks about the compression and expansion of a gas at a constant temperature.
From the question:
volume, V₁ =25 liters
pressure, P₁ = 10 atm
pressure, P₂ =15 atm
Formular for Boyle’s law:
P₁V₁ =P₂V₂
10 atm * 25 liters =15 atm * V₂
Making V₂ subject of the formular :
V₂= 10 atm * 25 liters
15 atm
= 16.7 liters.
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