100 Cc of 40°C Water is Contained in a Calorimeter with Negligible Heat Capacity. It takes 5 minutes for the water to cool to 35°C.
What does negligible heat capacity mean?Since the vessel has a very low heat capacity, you can conclude that the water is gaining all of the heat that the copper is losing. Decide on q=mc*deltaT for the copper and water, and then compare the temperatures.They can't be negative, though. How much energy must be added in order to raise a substance's temperature by a specific amount is known as its heat capacity. Since this is endothermic, it must be advantageous.In a calorimetric measurement, either (a) a process that is exothermic occurs and heat (q), which is negative, indicating that thermal energy is transferred from the system to its surroundings, or (b) a process that is endothermic occurs and heat (q), which is positive, indicating that thermal energy is transferred from the surroundings to.To learn more about Calorimeter refer to:
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Suppose you modify the glycine-tRNA so that the glycine is changed to valine. Based on the results of the Benzer experiments, _______ because the protein synthesis machinery recognizes the _______.
proteins would have valines where glycines normally are; amino acid attached to the tRNA
nothing should change in proteins; tRNA anticodon
nothing should change in proteins; amino acid attached to the tRNA
proteins would have valines where glycines normally are; tRNA anticodon
proteins would have glycines where valines normally are; amino acid attached to the tRNA
The synthesis of proteins machinery detects the tRNA anticodon, thus based on the findings of the Benzer experiment, protein would also have valines wherever glycines ordinarily are.
The definition of valine:C5H11NO2, a crystallized essential amino acid, is a component of both vegetable and animal proteins. Your body uses branched-chain amino acids to help create energy. Valine is mostly present in protein-rich foods such meat, fish, soy, as well as dairy.
What components make up valine?A sectioned amino acid called valine is made up of the amino acid glycine with the hydrogen linked to the alpha-carbon replaced by an isopropyl compound. It functions as a plant molecule and a metabolite for Daphnia magna.
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this nucleophilic substitution occurs with rearrangement. draw curved arrows to show the movement of electrons in the following step of the reaction mechanism____.
In chemistry, a nucleophilic substitution is a class of chemical reactions in which an electron-rich chemical species (known as a nucleophile) .
show the movement of electrons in the following step of the reaction mechanism?
Electron transfer (ET) occurs when an electron relocates from an atom or molecule to another such chemical entity. ET is a mechanistic description of certain kinds of redox reactions involving transfer of electrons.Curved arrows show how electrons move. Naturally, if electron movement occurs during a chemical reaction, atoms must move too. For example, atoms move closer when they form a new bond, and they move apart when a bond breaks, but curved arrows do not show these movements. Arrows are only used to show electron movements.Each step in a reaction mechanism is called an elementary reaction. Elementary reactions are a single step. They have no intermediates.To learn more about mechanism refers to:
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how has our understanding of matter changed over time?
Matter has evolved from the four elements to the new understanding of the quantum dimensions of matter.
What is matter?Our understanding of matter has changed significantly over time. In ancient times, matter was thought to be made up of four elements: earth, air, fire, and water. The Greek philosopher Aristotle proposed a system of matter in which everything was made up of combinations of these four elements.
More recently, scientists have been studying the properties of dark matter and dark energy, which are thought to make up most of the universe, but are not yet well understood.
Overall, our understanding of matter has evolved from the ancient belief in four elements, to the modern understanding that matter is made up of atoms, which are made up of smaller subatomic particles and are affected by particle fields and quantum mechanics.
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g dan koshland suggested the induced-fit mechanism for enzymes. which of the following cartoons illustrates the induced-fit hypothesis of enzyme-substrate interaction?
The induced-fit hypothesis of enzyme-substrate interaction illustrates that there is a conformational change in the active site of the enzyme when a substrate binds to it.
According to the induced-fit model, a substrate attaches to an active site, and the two of them slightly alter their shapes to form the perfect fit for catalysis. By bringing substrates together in the best possible orientation, enzymes encourage chemical reactions by establishing the perfect chemistry for the reaction to take place. According to the induced fit hypothesis, an enzyme's active site is not architecturally ideal for substrate binding while it is in the unbound state, or when it is not binding to a substrate. Refer to the image attached for the cartoon illustration.
This induced fit theory extends the lock-and-key idea proposed 100 years ago. In addition to explaining regulatory and cooperative effects, the new theory put out by D. E. Koshland, Jr. in 1958 also provides some new specificity notions. This theory states that an enzyme's unbound active region is not structurally suitable for substrate binding (i.e., not bound to the substrate).
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Write a complete arrow-pushing mechanism for the following reaction under acidcatalyzed conditions H3 C H +CH3 CH 2 OH⟶
A clear and precise depiction of the reactants and products is required for a comprehensive arrow-pushing mechanism.The reaction between H3C-H and CH3CH2OH occurs under acid-catalyzed .
conditions as follows: The acid catalyst, such as H2SO4, transfers a proton (H+) to the alcohol molecule's oxygen atom.resulting in the formation of a hydroxyl ion (CH3CH2O-). This hydroxyl ion is nucleophilic and attacks the alkane molecule's electrophilic carbon atom, generating a tetrahedral intermediate. As the intermediate forms, a link between the carbon atom and the proton is broken, resulting in the formation of a carbocation (H3C+). The link between the oxygen atom and the hydroxyl ion is also broken, resulting in the formation of a water molecule (H2O) and a new alcohol molecule (CH3CH2OH). The electron-rich oxygen atom stabilizes the carbocation, and the reaction is completed with the production of a new carbon-oxygen bond, yielding the result molecule CH3C-O-CH3. Under acid-catalyzed conditions, the overall arrow-pushing mechanism for this reaction is (Protonated alcohol) -> H3C+ + CH3CH2O- (Carbocation intermediate) -> CH3C-O-CH3 + H2O (Product).
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fill in the blank. complete the energy maximum electron capacity for each energy level. energy level 1 maximum electron capacity is choose___ . energy level 2 maximum electron capacity is choose___. energy level 3 maximum electron capacity is choose___. energy level 4 maximum electron capacity is choose___.
The maximum electron capacity at energy level 1 is 2. The maximum electron capacity at energy level 2 is 8. Maximum electron capacity at energy level 3 is 18. The maximum number of electrons at energy level 4 is 32.
What is electron?Having a negative electric charge, an electron is a subatomic particle. Together with protons and neutrons, it is one of the basic building blocks of atoms.
The chemical characteristics of elements are determined by electrons, which are found in the valence shell, the outermost shell of an atom. In addition, they have a role in the production of magnetism, electrical conduction, and chemical processes. Additionally, as in an electron beam, electrons can also exist freely and independently.
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nacl solutions of equal volume and concentration were kept in flasks and held at different temperatures. the two solutions were combined in a larger flask. based on this information, which of the following predictions is correct?
When equal volume and concentration of NaCl solutions, held at different temperatures, are combined in a larger flask, the final solution will have the following characteristics:
The final concentration of NaCl will be the same as the initial concentrations of the two solutions that were combined. This is because the volume and concentration of the solutions were equal, and therefore the number of moles of NaCl in each solution was also equal. When equal moles of a substance are combined, the concentration of that substance in the final solution will be the same as the initial concentrations.The final temperature of the solution will be a function of the initial temperatures of the two solutions and the heat capacities of the solutions. The heat capacity of a solution is the amount of heat required to raise the temperature of a given amount of the solution by one degree. If the heat capacities of the solutions are equal, then the final temperature will be the average of the initial temperatures. If the heat capacities are not equal, then the final temperature will be closer to the solution with the larger heat capacity.If the initial temperatures of the two solutions are very different, the mixing process may cause heat loss or gain to the surroundings, depending on whether the initial temperature of the solution is higher or lower than the surrounding temperature.In summary, the combination of equal volume and concentration of NaCl solutions, held at different temperatures, in a larger flask will result in a solution with the same NaCl concentration but a temperature that is determined by the initial temperature and heat capacities of the solutions.
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What will happen when equal volume and concentration of NaCl solutions, held at different temperatures, are combined in a larger flask?
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how old is Billie Eilish
Answer:
21
Explanation:
........................
Answer: 21
Explanation:
A block of aluminum occupies a volume of 10mL and has a mass of 40 g.
What is its density? (D = M/V)
Density of a block of aluminum occupies a volume of 10mL and has a mass of 40 g is 4g/ml.
Define density.
A material's density is determined by how closely it is packed. As the mass per unit volume, it has that definition. The relationship between density and volume and mass is inverse.
The density rises if the volume remains constant while the amount of matter increases. Density drops when volume grows without accompanying increases in mass. When a substance is heated, the molecules move faster and slightly farther apart, taking up more space and causing the density to drop. When something is cooled, the molecules slow down and get a little closer together, taking up less space and becoming denser.
D = M/V
Mass, M is 40 g.
Volume, V of 10mL
Density, D will be 40/10 i.e. 4g/ml.
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surviving salt fluctuations: stress and recovery in halobacterium salinarum, an extreme halophilic archaeon
It can withstand high salt concentrations by using suitable solutes including potassium chloride for minimizing osmotic stress. It has many active transporters to keep potassium levels balanced and extremely acidic proteins to keep protein precipitation at bay.
Halobacterium salinarum also called as Halobacterium cutirubrum and Halobacterium halobium is a marine obligate aerobic archaeon that is exceptionally halophilic. Despite its common name, this was not a bacterium, but rather a component of the Archaea domain. Salted fish, skins, hypersaline lakes, and even salterns contain it.
sanitarium to pump large amounts of salt into its cell, but at the same time it can be a potentially lethal threat; if they are exposed to low molarity water, osmosis causes water to flood the cell causing the membrane to lyse or burst.
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the fictional exploits of excited the imagination of an emerging generation of forensic scientists and criminal investigators.
Forensic science is described as the application of science to law. 2. The fictitious adventures of Sherlock Holmes piqued the interest of a younger group of forensic scientists as well as criminal detectives.
Forensic science was an important component of the criminal justice system. Forensic scientists study and analyze evidence collected from crime scenes as well as other locations to produce objective results that can aid in the investigation as well as prosecution of criminal criminals or clear an innocent person of such suspicion.
DNA testing as well as analysis is now regarded as the most reliable of any and all forensic tools. Unlike lot of people of the others assembled to address the requirements of law enforcement, it was subjected to rigorous scientific experimentation as well as validation before being used in forensic science.
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Enter your answer in the provided box. Hydrogen sulfide decomposes according to the following reaction, for which Kc 9.30x10 S at 700 C: 2 H2 S(g) 2 H2(g)+S2(g) If 0.49 mol of H2 (g) at 700 C? S is placed in a 3.0-L. container, what is the equillbrium concentration of H
When the Hydrogen sulfide decomposes according , the equilibrium concentration of H₂ is 0.0019 mol/L.
Given that :
Numbers of moles of H₂S = 0.49 moles
The Volume = 3.0 L
The Equilibrium constant = 9.30 × 10⁻⁸
The reaction is given as :
2H₂S ⇄ 2H₂(g) + S₂(g)
Initial concentration = 0.49 / 3
= 0.16 mol
2H₂S ⇄ 2H₂(g) + S₂(g)
Initial 0.9166 0 0
Change -2 x +2 x + x
Equilibrium (0.16 - 2x) 2x x
kc = [H₂]²[S₂]² / [H₂S]²
9.30 × 10⁻⁸ = (2x)²(x²) / ( 0.16 - 2x)²
x = 9.5 × 10⁻⁴
The equilibrium concentration for H₂ = 2x
= 2 × 9.5 × 10⁻⁴
= 0.0019 mol/L
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A gas sample consisting of 2.0 moles of hydrogen and 1.0 mole of oxygen is collected over water at 29ºC and 75 kPa. What is the partial pressure of the hydrogen in this sample.
Please provide an explanation.
A gas sample consisting of 2.0 moles of hydrogen and 1.0 mole of oxygen is collected over water at 29ºC and 75 kPa. 48 kPa is the partial pressure of the hydrogen in this sample. Therefore, option B is correct.
What do you mean by partial pressure ?The term partial pressure is defined as the pressure that a gas, in a mixture of gases, would exert if it alone occupied the whole volume occupied by the mixture.
Total number of mole = 2 + 1
= 3 moles
Temperature = 29ºC
Total pressure = 75 kPa
partial pressure = mole fraction x total pressure
P V = n R T
= 48 kPa
The partial pressure of the hydrogen is 48 kPa
Thus, option B is correct.
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Your question is incomplete, most probably your question was
A gas sample consisting of 2.0 moles of hydrogen and 1.0 mole of oxygen is collected over water at 29ºC and 75 kPa. What is the partial pressure of the hydrogen in the sample?
A) 24 kPa
B) 48 kPa
C) 72 kPa
D) 75 kPa
you analyze a sample of carbon and determine that 6% of the carbon atoms in your sample have a mass number (atomic mass) greater than 12, (12 is the normal atomic mass of carbon). based on these results, which of the following can you reasonably conclude?
If you analyze a carbon sample and discover that 6% of the carbon atoms have an atomic number greater than 12, you may safely assume that 6% of the sample is made up of carbon isotopes.
Carbon-12 (12 C), which has six neutrons in addition to its six protons, is by far the most common isotope of carbon. The following-heaviest isotope of carbon, carbon-13 (13 C), has seven neutrons. They are both referred to as stable isotopes since neither 12 C nor 13 C experience radioactive decay over time. The nuclear charge number (sign Z) of an atomic nucleus is the chemical element's atomic number. The proton number in regular nuclei is equivalent to this (np).
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Use the following data to answer the questions below. Assume 9.045 g of stearic acid, and
1.327 g of unknown for the mixture runs 4-6. Assume the k, is 4.50°C kg/mole. Assume
the uncertainty is ±1 in the last digit (±0.001 g for the masses and ±0.01 for kr).
Run 1:
Solvent
T/solvent = 68.9 ± 0.2°C
T/solvent = 69.0 ± 0.2°C
Run 2:
Solvent
Run 3:
Solvent
Tsolvent 67.8 ± 0.2°C
Run 4:
Mixture ~2 g
T2g = 64.6 ± 0.3°C
Run 5:
Mixture ~2 g
T2g = 64.3 ± 0.3°C
Run 6:
Mixture ~2 g
T2g = 64.7 ± 0.3°C
In groups, create a flow chart below including the equations required to process the
raw data into molar mass for the runs given. Indicate when values are averaged and
ATS are determined.
In order to arrange candidates for recruiting and recruitment purposes, businesses use applicant tracking systems (ATS).
What formula is used for ATS?The allocation, presale backorder allocation, turnover, and (optional) on order quantity are added together to form the average transaction price (ATS), which is then decreased. It's equivalent by default to the quantity of a product that is allotted for sale (the allocation value).In order to arrange candidates for recruiting and recruitment purposes, businesses use applicant tracking systems (ATS). With the help of these tools, organizations may gather data, classify prospects according to their experience and skill set, and screen candidates.A candidate's progress through the hiring and recruiting process can be followed by recruiters and employers using an application tracking system (ATS).The complete question is,
What do ATSs serve as their primary function?
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Calculating Standard Product ATS, The allocation, presale backorder allocation, turnover, and (optional) on order quantity are added together to form the ATS.
How is ATS determined?
Calculating Standard Product ATS, The allocation, presale backorder allocation, turnover, and (optional) on order quantity are added together to form the ATS. It's equal to the quantity of a product that is reserved for sale by default (the allocation value).
Repeating measurements is the best technique to determine the degree of uncertainty surrounding a set of data.
Mixture ~2 g
T2g = 64.7 ± 0.3°C
Cot 2g 6 e g o
Since all the electrons in t 2g are coupled up, the ligand must have a strong field, and that ligand is oxalate (C 2 O 4).
2−
[Co(C 2 O 4 ) 3] is the name of the substance.
3+
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Define displacement reaction with an activity
Answer :a chemical reaction in which a more reactive element displaces a less reactive element from its compound
Explanation:
Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound. Both metals and non-metals take part in displacement reactions. Example : Reaction of iron nails with copper sulphate solution.
Answer:
Chemical reactions known as displacement reactions occur when a more reactive element removes a less reactive element from a molecule.
how many moles are in 500 grams of BeCr2O7
1.81 moles are in 500 grams of BeCr2O7.
Molar mass of BeCr2O7 = 276.095 g/mol
500 g / 276.095 g/mol = 1.81 moles
What is moles?
Moles is a unit used to measure the amount of a substance. It is defined as the amount of a substance that contains the same number of atoms, molecules, ions, or electrons as the number of atoms in 12 grams of carbon-12 (C-12). This means that one mole of any substance will contain the same number of atoms, molecules, ions, or electrons as one mole of C-12. Moles are used in chemistry to measure the quantity of a substance. For example, when a chemist mixes two solutions together, they can use moles to calculate the amount of each substance that was mixed.
Therefore, 1.81 moles are in 500 grams of BeCr2O7.
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What is the answer/solution to this problem SiI4 + Mg
SiI4 + 2Mg → Si + 2MgI2 is the the answer/solution to this problem SiI4 + Mg which expresses its balanced equation.
What is Silicon?Silicon is described as a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster, and is a tetravalent metalloid and semiconductor.
There are four rules to balance a chemical equation and it is shown below:
Check that all the formulae in the equation are correct.Deal with only one element at a time.Balancing is adding BIG numbers. You cannot change any of the small numbers in a chemical formula. Check each element again and repeat step 3 again if needed.Learn more about chemical equation at: https://brainly.com/question/29886207
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a sample of a substance has a mass of 50.0 grams, g, and occupies a volume of 3.95 milliliters, ml. calculate the density of the object in grams per milliliter, gml.please choose the correct answer from the following choices, and then select the submit answer button. answer choices
Density of the given sample is 12.66 grams per milliliter.
Mass per unit volume is the definition of a material's density. The degree to which matter is packed together is fundamentally measured by density. It is a particular physical characteristic of a specific thing.
Density = mass/volume
Given mass = 50g
Given Volume = 3.95mL
According to question, we are required to find the density in units : grams per milliliter
Since the given values for mass and volume are grams and milliliters respectively, no change in units is required.
Putting the given values in the formula, Density = mass/volume
Density = 50/3.95
Density = 12.658 grams per milliliter
We can say, Density = 12.66 grams per milliliter
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suppose a sequence of enzymatically catalyzed reactions converts substrate a to final product d through a sequence of reactions involving the production of intermediate products b and c as shown. product d inhibits enzyme e1. if the enzymes e1-e3 are all present in a test tube and substrate a is added to the reaction mixture, how will the concentration of intermediate b change? e1 e2 e3 a b c d first increase, then decrease increase to a fixed value increase to the concentration of a added oscillate between zero and the concentration of a added remain at zero
first increase, then decrease When A is added, some B will be produced, so its concentration will rise. As D is produced and begins to inhibit E1, the rate of production of B will fall.
Since E2 causes C to be produced from B, the concentration of B will then fall.The concentration of intermediate product b will first increase as it is produced by enzyme e1, but it will eventually decrease as product d accumulates and inhibits enzyme e1, slowing down the production of intermediate b.sequence of enzymatically catalyzed reactions converts substrate a to final product d through a sequence of reactions involving the production of intermediate products b and c as shown. product d inhibits enzyme e1. if the enzymes e1-e3 are all present in a test tube and substrate a is added to the reaction mixture,e1 e2 e3 a b c d first increase, then decrease increase to a fixed value increase to the concentration of a added oscillate between zero and the concentration of a added remain at zero.
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How many grams of hydrogen gas is needed to produce 84.2 grams of ammonia, given the following balances equation chemical reaction
N ₂ + 3H ₂ —-> 2NH ₃
Taking into account the reaction stoichiometry, a mass of 14.86 grams of H₂ is needed to produce 84.2 grams of ammonia.
Reaction stoichiometryThe balanced reaction is:
N₂ + 3 H₂ → 2 NH₃
By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:
N₂: 1 moleH₂: 3 molesNH₃: 2 molesThe molar mass of the compounds is:
N₂: 28 g/moleH₂: 2 g/moleNH₃: 17 g/moleBy reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
N₂: 1 mole ×28 g/mole= 28 gramsH₂: 3 moles ×2 g/mole= 6 gramsNH₃: 2 moles ×17 g/mole= 34 gramsMass of O₂ requiredThe following rule of three can be applied: If by reaction stoichiometry 34 grams of NH₃ are produced by 6 grams of H₂, 84.2 grams of NH₃ are produced by how much mass of H₂?
mass of H₂= (84.2 grams of NH₃× 6 grams of H₂)÷ 34 grams of NH₃
mass of H₂= 14.86 grams
Finally, 14.86 grams of H₂ are needed.
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In the synthesis reaction, how many grams of magnesium were there in the crucible before heating? Select one:
a. 8.3 g b. 6.2 g c. 4.1 g d. 5.0 g
Magnesium was 5.0g before heating.
Synthesis reaction: It is the type of reaction in which two different atom reacts to form different molecule or compound.When exposed to oxygen, magnesium turns into magnesium oxide. Burning of a piece of magnesium(Mg) wire in the air(oxygen) results in the production of Magnesium oxide(MgO).Go through the given link below to know more about magnesium:-
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which of the following represents the correct balanced formula of lead (ii) nitrate (aq) combines with potassium iodide (aq)?
Formula for lead nitrate with potassium iodide
Pb ( NO 3 ) 2 ( l ) ( l ) KI plus lead nitrate ( s ) Iodide of potassium (PbI 2). ( s ) KNO + Lead Iodide = ( l ) nitrate of potash.
What impact do nitrates have on the body?Blood pressure is lowered, platelet aggregation is inhibited, and vessels are protected thanks to nitrate, which performs physiological actions comparable to those of NO [3, 37].
Why are nitrates harmful and what are they?Why Nitrates Should Be Avoided. Stomach acid cannot degrade nitrates on its own. Rather, your gut biome may convert nitrate to nitrite, which may result in health issues like a higher risk of cancer. An inorganic, liquid chemical is nitrate.
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in a 52 weeks high and low, if the numbers show difference between each other, there is less risk of loss - but there is also less opportunity for gain, either.
Smaller numbers mean less risk of losing, but less chance of gain, Volatility.
What is gain?In electronics, gain is a measure of the ability of a two-terminal circuit (often an amplifier) to increase the power or amplitude of a signal from its input. Adjusting the gain control sets the amount of distortion in the sound no matter how loud the final volume is set. This means that the gain setting determines how clean or dirty the sound is, regardless of the master volume setting.Gain is simply the amplification factor, i.e. the parts of the output power to input power. Wins are often expressed in percentages, especially for small wins. Example 3% of ratio signifies to a power gain of 1.03.to learn more about gain from the given link:
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The colors in this image show topography. The warm colors-red, pink, and yellow- represent landforms above sea level. The greens and blues indicate changes in topography below sea level. Deep in the Atlantic Ocean is an enormous mountain range, longer than any on land, shown here as a linear feature green. What is this underwater mountain range, and why is it almost exactly in the middle of the ocean? With your partner, discuss why you think there is a mountain range deep under the ocean's surface. What do you make of this feature? Record your thoughts below.
The underwater mountain range that is shown in the image is the Mid-Atlantic Ridge. This range runs down the center of the Atlantic Ocean, and is a part of the global mid-ocean ridge system.
The Mid-Atlantic Ridge is a divergent plate boundary, which means that it is an area where two tectonic plates are moving away from each other. As the plates move apart, magma from the Earth's mantle rises to the surface and cools, forming new crust. This process of seafloor spreading is what creates the underwater mountain range.
What is the Mid-Atlantic Ridge about?One possible explanation for the location of the Mid-Atlantic Ridge in the middle of the ocean is that it is a response to the convective motion of the Earth's mantle. The mantle is made up of hot, dense rock that is constantly moving around.
Another possible explanation is that the Mid-Atlantic Ridge is the result of past tectonic activity. The Atlantic Ocean was formed by the separation of the supercontinent Pangea into two parts, Laurasia and Gondwana. The ridge is a remnant of the rift that separated these two supercontinents.
In all, the Mid-Atlantic Ridge is a fascinating feature that provides important information about the Earth's geology and tectonic activity. Its location in the middle of the ocean is a reminder of the dynamic nature of our planet, and the ongoing process of seafloor spreading that is constantly shaping the Earth's surface.
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Drag and drop the following building materials from lowest to highest based on their
porosity.
Lowest
Concrete
Oak
2nd Lowest
Clay
2nd Highest
Slate
Highest
Due to their porous and permeable nature, gravel and sand are excellent aquifer materials. The most permeable material is gravel.
What is porosity of building materials?The porosity of a substance is determined by how much of its total volume is made up of such spaces as a proportion of its entire volume made up of solids and pores. Common building materials like plaster, concrete, and brick all have varying degrees of porosity, falling between 50% and 65% for plaster, 40% for concrete, and 55% for brick.Glass, polymers, metals, and varnished wood are a few materials that don't have pores.Microporous, mesoporous, and macroporous materials are the three sizes of porous materials, respectively.Due to their frequent formation at depth and interlocking crystal structure, igneous or metamorphic rocks have the lowest primary porosity.To learn more about materials refer to:
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What amount of heat (in kJ) is required to convert 13.7 g of an unknown liquid (MM = 83.21 g/mol) at 19.2 °C to a gas at 93.5 °C? (specific heat capacity of liquid = 1.58 J/g･ °C; specific heat capacity of gas = 0.932 J/g･ °C; ∆Hvap = 22.5 kJ/mol; normal boiling point, Tb = 57.3 °C)
Why is the mass of Lithium listed on the periodic table 6.941 and not 6 or 7?
How many moles of calcium atoms do you have if you have 2.77 × 10²¹ atoms of calcium. (The mass of one mole of calcium is 40.08 g.)
Answer:
4.98x10^-3
Explanation:
I want to convert the concentration of a 5.67 % (m/v) solution to its equivalent concentration as %(m/m). The density of the solution has been measured to be 1.2 g/mL. My solution is (5.67 % m/v) x 1.2 g/mL = 6.80 % (m/m).
The percent mass per mass concentration of the solution is 6.80 % (m/m).
What is the percent concentration?We have to note that there are several units of concentration that we are going to have in the chemistry. One of the most common of the units of concentration is the percent concentration. We could look at the percent concentration in three ways;
Percent mass per mass(%m/m)
Percent volume per volume (%v/v)
Percent mass per volume (%m/v)
To convert from percent mass per volume to percent mass per mass, we convert by the density of the solution. In this case, the density of the solution is 1.2 g/mL
We then have;
% m/m = 5.67 % (m/v) * 1.2 g/mL = 6.80 % (m/m)
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