Being non-polar and a liquid at normal temperature, bromine, Br2, will mix with CCl4, another non-polar molecule.
Being non-polar and a liquid at normal temperature, bromine, Br2, will mix with CCl4, another non-polar molecule. While the others are all liquids at ambient temperature, their polar nature prevents them from mixing with CCl4. In contrast to ethanol and water, "CCl (4)" and "CCl (4)" are miscible in all amounts. Compare this behavior to the molecules of these substances. Nonpolar and organic solvents include carbon tetrachloride. Additionally a non-polar and organic solvent, benzoene. based on the similar-to-dissolve-like theory of solubility. Benzene and carbon tetrachloride are thus miscible liquids.
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draw the structures of the products of the neutralization reaction between hydroxide ion and acetic acid. include all valence lone pairs in your answer. draw one structure per sketcher. add additional sketchers using the drop-down menu in the bottom right corner. separate multiple products using the sign from the drop-down menu.
This process is referred to as an acid-base reaction. Salt and water are produced when acid and base interact.We receive water and acetic acid's conjugate base because only OH- is present in this situation.
What is a sample of an acid-base reaction?An acid-base neutralization reaction was formulated as a double replacement reaction in this standard approach.For instance, sodium hydroxide (NaOH) and hydrochloric acid (HCl) solutions react to form sodium chloride (NaCl) solutions along with some extra water molecules.
What does "acid-base" mean?Any substance containing hydrogen that is capable of donating a proton (hydrogen ion) to another chemical is referred to be an acid.A bases is a protein and ion that can absorb the hydrogen ion from an acid.Acidic substances are typically easy to recognize by their sour flavors.
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3
3
The absolute temperature of a gas is increased four times while maintaining a constant volume. What happens to th
pressure of the gas?
O It decreases by a factor of four.
O It increases by a factor of four.
O It decreases by a factor of eight.
O It increases by a factor of eight.
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Absolute temperature means temperature given in kelvin
PV = nRT
V, R, n is constant
Thus P is directly proportional to T
so when temperature increase by 4 times, the pressure will also increase by 4 times, notice that this is only true if the temperature is in kelvin
3
3
The absolute temperature of a gas is increased four times while maintaining a constant volume. What happens to th
pressure of the gas?
O It decreases by a factor of four.
O It increases by a factor of four.✅
O It decreases by a factor of eight.
O It increases by a factor of eight.
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Find the volume of the right cone below in terms of π. hight 24 radius 9
The volume of a cone can be determined from its radius and height. The volume of the cone with a height of 24 cm and radius of 9 cm is 2034.7 cm³.
What is volume ?The volume of an object is the measure of the space occupied by the object. The volume of different geometries can be calculated using suitable parameters such as their radius, side length, height etc.
A cone is a type of geometry that represents a 3D shape with smooth narrowing from the flat base.
The volume of a cone = 1/3 πr²h
Here, radius of the cone r = 9 cm
height h = 24 cm
then volume = 1/3 π(9 cm)²×24 cm
v= 2034.72 cm³
Therefore, the volume of the cone is 2034.72 cm³.
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Use the periodic table to determine the electron configuration for Si and Y in noble-gas notation.
Si:
O [He]2s²2p 3s²3p5
O [Ar]4s²4p5
O [Ne]3s²3p²
O [Ne]3s²3p4
The electron configuration for silicon (Si) in noble gas notation is:[Ne]3s²3p² .The electron configuration for Yttrium (Y) in noble gas notation is:[Kr]5s²5p².
What is electron configuration?The arrangement of electrons in orbitals surrounding an atomic nucleus, also known as electronic structure or electron configuration. An atom's electron configuration represents the arrangement of electrons scattered across the orbital shells and subshells. The four types of orbitals (s,p,d, and f) have various forms, and each orbital can only house two electrons. Because the sublevels of the p, d, and f orbitals differ, they may carry more electrons. As previously established, each element's electron configuration is unique to its location on the periodic table.
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Answer:
C: [Ne]3s23p2
B: [Kr]5s24d1
Explanation: edge
Determine the rate law for this reaction.
Rate law =
Calculate the value of the rate constant at 225°C.
Calculate the rate of appearance of CO₂ when [NO₂] = [CO] = 0.550 M.
Because the rate constant varies with temperature, its value at 225°C must be established in order to calculate the actual rate of the reaction that is k * 0. 550^2 M^2.
What is reaction?A chemical reaction is a process that results in the chemical change of one set of chemical components into another. A chemical reaction is a process in which one or more compounds, known as reactants, are changed to one or more distinct substances, known as products. Substances are either chemical elements or compounds.
Here,
The rate law for the reaction NO2 + CO -> NO + CO2 can be determined using experiments to measure the rate of the reaction as a function of the concentrations of NO2 and CO. The rate law describes the relationship between the rate of the reaction and the concentrations of the reactants.
If the rate law is first order with respect to NO2 and first order with respect to CO, then it can be written as:
rate = k[NO2][CO]
where k is the rate constant, which has units of M^-1 s^-1. To calculate the value of the rate constant, k, at 225°C, you would need to perform an experiment to measure the rate of the reaction at that temperature and then use the rate law to determine k.
To calculate the rate of appearance of CO2 when [NO2] = [CO] = 0.550 M, we can use the rate law and the value of the rate constant:
rate = k[NO2][CO] = k * 0.550 M * 0. 550 M = k * 0. 550^2 M^2
Since the rate constant is temperature-dependent, its value at 225°C would need to be determined in order to find the actual rate of the reaction that is k * 0. 550^2 M^2.
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The hybridization of one s and one p orbital will result in the formation of two ____ hybrid orbitals. This will leave _____ unhybridized valence p orbital(s), lying at right angles to the hybrid orbitals.
The hybridization of one s and one p orbital will result in the formation of two sp hybrid orbitals. This will leave one unhybridized valence p orbital, lying at right angles to the hybrid orbitals.
Hybridization is a process in which atomic orbitals of similar energy and shape mix together to form new orbitals of the same total energy. This can occur when atoms or molecules come together or when a molecule is exposed to certain kinds of radiation.
In chemistry, hybridization is most commonly used to describe the bonding between atoms of different elements. Hybridization is important because it allows atoms to form strong bonds by sharing electrons more evenly. This allows molecules to form more complex structures and can help explain the behavior of complex molecules.
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the temperature at which the following process reaches equilibrium at 1.0 atm is the normal melting point for phosphoric acid
The given process reaches equilibrium at 1.0 atm is the normal melting point for phosphoric acid at 144° C.
The temperature at which the melting process in the instance of phosphoric acid reaches equilibrium at 1.0 atm is referred to as its normal melting point. Purity, pressure, and other circumstances, as well as other considerations, will all affect the precise temperature. The temperature at the point where the solid-liquid equilibrium is reached must be recorded in an experiment under carefully controlled circumstances, such as at a constant pressure of 1 atm, in order to ascertain the typical melting point of phosphoric acid.
Now let us consider the given question
We know that,
∆Gº = ∆Hº - T∆Sº
At equilibrium ∆Gº = 0
⇒ 0 = ∆Hº - T∆Sº
⇒ T = ∆Hº / ∆Sº
⇒ ∆Hrxn = -136.3 - (-187.7) = 51.4 kJ/mol
⇒ ∆Srxn = -.2327 - 0.1096 = 0.1231 kJ/K mol
⇒ T = 51.4 kJ/mol / 0.1231 kJ/K mol
⇒ T = 477.55K
⇒ T = 144ºC
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The complete question is:
The temperature at which the following process (See the table) reaches equilibrium at 1.0 atm is the normal melting point for phosphoric acid.
[tex]H_{2}O_{2} (l)[/tex] ⇄ [tex]H_{2}O_{2} (g)[/tex]
To determine this temperature, use the following thermodynamic information at 298 K.
a student picked up a sealed baggie filled with ice cubes from the nurse. The ice completely melted before class ended. If the baggie remained sealed, what happened to the mass of the water molecules inside the bag?
A student picked up a sealed baggie filled with ice cubes from the nurse. The ice completely melted before class ended. If the baggie remained sealed, the mass of the water should remain the same before and after it turns into ice.
What happens to the mass of ice when it melts ?There are no particles destroyed or added. Furthermore, the particles' size and shape remain constant. Contrary to popular belief, matter and mass or weight are conserved to stay the same during phase change.
The nurse handed a student a sealed baggie filled with ice cubes. Before class ended, the ice had completely melted. If the baggie is still sealed, the mass of the water should be the same before and after it freezes.
Thus, the mass of the water should remain the same before and after it turns into ice.
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Classify each amino acid into the following categories. Select the amino acid that fits best in each category. Each amino acid will be used only once.1. A basic amino acid:LysAspThrLeu2. An acidic amino acid:LysAspThrLeu3. A neutral polar amino acid:LysAspThrLeu4. A hydrophobic amino acid:LysAspThrLeu
The amino acid which is basic in nature is Lysine. The amino acid which is acidic in nature is aspartic acid. The amino acid which is neutral polar is threonine and the amino acid which is hydrophobic in nature is leucine.
At physiological pH, Lysine (Lys) develops full positive charge in their side chains. Hence, they are basic in nature.
At the pH of body fluids, amino acids such as glutamic acid and aspartic acid can release a proton from their additional carboxyl group and acquire a negative charge themselves.
Threonine is a polar but uncharged amino acid and hence prefer aqueous phase where they can form bonds with hydrogen.
Leucine only contains carbon and hydrogen in its structure and hence it is a hydrophobic and non-polar amino acid.
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Complete question:
Classify each amino acid into the following categories:
1. A basic amino acid
2. An acidic amino acid
3. A neutral polar amino acid
4. A hydrophobic amino acid
Select the amino acid that fits best in each category. Each amino acid will be used only once. Options are: Lysine, Aspartic acid, Threonine, Leucine.
a phase change caused by the__________of heat will result in a(n)___ of the order of the substance. select all that apply.
A phase change caused by the addition or removal of heat will result in a change of the state or phase of the substance.
Whether heat is being added to or removed from the substance is indicated by the phrases "addition" and "removal."
A phase shift, such as melting or boiling, can happen when heat is applied to a substance, changing it from a solid to a liquid or from a liquid to a gas, respectively. Endothermic processes are what are used to describe this kind of phase change.
A phase shift, such as freezing or condensation, can happen when heat is removed from a substance, changing it from a liquid to a solid or from a gas to a liquid, respectively. An exothermic process is the term used to describe this kind of phase transition.
In conclusion, a phase change brought on by the addition of heat will cause the substance to move from a more energetic state (such as solid to liquid) to a less energetic state, and a phase change brought on by the removal of heat will produce the opposite effect (e.g. liquid to solid).
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a phase change caused by the __________of heat will result in a(n)___ of the order of the substance. select all that apply.
A. removal of heat
B. phase change
C. liquid becomes a solid
D. None of the above
some of the formulas could be either molecular or empirical formulas; however, some can only be molecular formulas.
The formula CH₂O must be a molecular formula. The molecular formula of a compound is the actual number of atoms of each element in a molecule of the compound, while the empirical formula is the simplest whole-number ratio of atoms in the compound.
The formulas PO, C₂H₆, CH₂O, C₃H₄O₃, and C₂H₄O₂can all be either molecular or empirical formulas.
However, for some formulas, there can only be one possible molecular formula, meaning that it cannot be represented as an empirical formula. For example, the formula CH₂O must be the molecular formula because the empirical formula, CH, represents half the number of atoms in the molecule.
So, the formula CH₂O must be a molecular formula.
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Complete question:
Some of the formulas could be either molecular or empirical formulas; however, some can only be molecular formulas. Which of the formulas must be molecular formulas?
РО
C₂H₆
CH₂O
C₃H₄O₃
C₂H₄O₂
7. The equation below is balanced.
2 H₂(g) + O₂(g) → 2 H₂O(g)
If 8.0 moles of O₂ are completely consumed, what is the total number of moles of H₂O produced?
Enter your answer in the box. Enter the number only.
Metallic magnesium can be made by the electrolysis of molten MgCl2. (a) What mass of Mg is formed by passing a current of 5.25 A through molten MgCl2 for 2.50 days?
Metallic magnesium can be made by the electrolysis of molten MgCl2. 14.84g of Mg is formed by passing a current of 5.25 A through molten MgCl2 for 2.50 days.
What is mass ?The term mass is defined as a dimensionless quantity representing the amount of matter in a particle or object. The standard unit of mass in the International System (SI) is the kilogram (kg).
Given:
2.50 days = 224640 sec
Mg2+ + 2e- ⇒ Mg
5.25 A = 5.25Coulomb / s
5.25 C/s x 224640 s
= 117,915 C
117,915 C / 96500 C/F
= 1.22 F
1.22 F (1 mole Mg/ 2 F)
= 0.61 mole
Mass Mg = 0.61mol x 24.3 g/mol
= 14.84g
Thus, 14.84g of Mg is formed by passing a current of 5.25 A through molten MgCl2 for 2.50 days.
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given 48.75 grams of O2, how man moles of H2O are required?Please look at screenshot.
As per the balanced reaction given, 2 moles or 64 g of oxygen gives 2 moles or 36 grams of water. Hence, 48.75 g of oxygen gives 27.42 g of water.
What is theoretical yield ?The theoretical yield of a reaction is the amount of product predicted based on the balanced chemical equation of the reaction. From this, the number of moles or mass of the product can be calculated from the given mass of reactants.
As per the balanced reaction, 2 moles of oxygen gives 2 moles of water.
mass of O₂ = 32 g/mol
mass of 2 moles = 64 g
molar mass of water = 18 g/mol
mass of 2 moles = 36 g.
Hence, 64 g of oxygen gives 36 g of water.
Mass of water produced by 48.75 g of oxygen gas is:
(48.75 × 36)/64 = 27.4 g.
Therefore, 27.4 g of water is produced by 48.75 g of oxygen gas.
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In a mass spectrometer, a compound is first vaporized and converted into ions, which are then separated based on a difference in their A boiling points E B dipole moments AL C mass-to-charge ratio Qu D ability to form hydrogen bonds
The correct answer is C) mass-to-charge ratio. In a mass spectrometer, a compound is first vaporized and converted into ions, which are then separated based on their mass-to-charge ratio.
A mass spectrometer is a tool used to identify the chemical composition of a sample. The process starts with the vaporization of a sample, turning it into gas. The gas is then ionized, creating positively charged ions. The ionized particles are then separated based on their mass-to-charge ratio. This separation is achieved by using magnetic and electric fields. The ions travel through the spectrometer and are separated based on their m/z ratio. The m/z ratio is calculated by dividing the mass of the ion by its charge. The resulting spectrum provides information about the chemical composition of the sample and is used to identify unknown compounds. Mass spectrometry is an important technique in many scientific fields, including analytical chemistry, environmental science, and biochemistry.
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hydrofluoric acid and water react to form fluoride anion and hydronium cation, like this: (aq)(l)(aq)(aq) at a certain temperature, a chemist finds that a reaction vessel containing an aqueous solution of hydrofluoric acid, water, fluoride anion, and hydronium cation at equilibrium has the following composition:
equilibrium constant can be defined as the ratio between the amount of reactant and the amount of product which is used to determine chemical behaviour. The value of equilibrium constant of the reaction is [tex]1.095*10^{-4}[/tex].
Concentration= [tex]n/v[/tex] where, n is moles of the compound and v is the volume of the solution in litres.
moles of HF= [tex]1.62g/20g/mol=0.081mol[/tex]
volume of the solution in the vessel= V= 5.6L
[HF]= [tex]0.081mol/5.6L=0.01446M[/tex]
moles of F- = [tex]0.163g/19g/mol= 0.008579mol[/tex]
volume of the solution in the vessel, V= 5.6L
[F-]= [tex]0.008579mol/5.6L=0.001532M[/tex]
Moles of H3O+ = [tex]0.110g/19g/mol= 0.05789mol[/tex]
Volume of the solution in the vessel, V= 5.6L
[H3O+]= [tex]0.05789mol/5.6L= 0.001034M[/tex]
An equilibrium expression is given as:
[tex]Kc= [F-][H3O+]/[HF]= 0.001532*0.001034M/0.01446M[/tex]
Kc = [tex]1.095*10^{-4}[/tex]
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A photoelectric experiment was performed by separately shining a laser at 450 nm (blue light) and a laser at 560 nm (yellow light) on a clean metal surface and measuring the number and kinetic energy of the ejected electrons. What light would generate more electrons? Which light would eject electrons with greater kinetic energy? Which light would eject electrons with greater kinetic energy? Assume that the same amount of energy is delivered to the metal surface by each laser and that the frequencies of the laser lights exceed the threshold frequency.
The yellow light must be more intense than the blue light since both lasers send the same amount of energy to the metal surface. The yellow light must therefore produce more electrons.
Because of the shorter wavelength of blue light, the ejected electrons must have a higher kinetic energy. Blue light contains more energetic and shorter-wavelength photons than yellow light does. Since both lasers apply the same amount of energy to the metal surface, it follows that the yellow light must be more intense than the blue light. In order to produce more electrons, the yellow light must be stronger. Blue light has shorter waves and its wavelengths are in the range of 450 to 495 nanometers. Red light has longer waves and its wavelengths range from 620 to 750 nm. The energy content of blue light is more than that of red light, which has a lower frequency.
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solve for the ifnal pressssure in terms of original pressures of helium and neon assume temperature is constnat
To solve for the final pressure in terms of the original pressures of helium and neon, assuming temperature is constant, you can use the ideal gas law. The equation is:
P1V1/T1 = P2V2/T2
Where P1 and V1 are the original pressure and volume of the gas, respectively, and P2 and V2 are the final pressure and volume of the gas, respectively. Since T1 and T2 are assumed to be constant, the equation can be simplified to:
P2 = P1V1/V2
The pressure of helium is affected by temperature and volume. At a given temperature, the pressure of helium increases as its volume decreases. This is because as the volume of helium decreases, more of the molecules are pushed closer together, forcing them to move faster and collide more often.
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choose the option below that is most likely to be miscible with a nonpolar liquid. select the correct answer below: polar liquids liquids that form hydrogen bonds liquids that cannot form hydrogen bonds liquids whose molecules exhibit dipole-dipole attractions
A nonpolar liquid is most likely to be miscible with a substance whose molecules display dipole-dipole attractions.
What does a nonpolar solvent most readily dissolve?That nonpolar gases are best soluble in nonpolar liquids is not unexpected. London dispersion forces are present in both solvent-solvent interactions and solvent-solvent interactions, and they are nearly equivalent in size.
The solute is entirely miscible with which non-polar solvent when the two are combined?Objects that have been dissolved in a solution are referred to as solutes. In a fluid solution, there are more solvent molecules than solute molecules. One of the most typical solutes in our daily life is salt, followed by water. In water, salt dissolves, making it the solute.
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consider the chemical reaction where and are unknown positive integers. the reaction must be balanced; that is, the number of atoms of each element must be the same before and after the reaction. for example, because the number of oxygen atoms must remain the same, while there are many possible choices for and that balance the reaction, it is customary to use the smallest possible integers. balance this reaction.
aC2H6 + bCO2 + cH2O → dC2H5OH The balanced equation for the reaction is given as; 6C2H6 + 2CO2 + 3H2O → 7C2H5OH, Check! Oxygen Product = 7 Carbon Reactant = 6 * 2 + 2 = 14 Product = 7 * 2 =14 Hydrogen d = 7.
O2 is used to refer to oxygen; O is not?The manner that chemical equations are written ensures that almost all of the molecules are visible.Each oxygen molecule contains two oxygen atoms, which is why the symbol for it is [2].Recall that only two oxygen atoms make up each diatomic oxygen molecule that we breathe.
What processes does carbon undergo?Oxidation processes, addition reactions, substitution reactions, and combustion reactions are the four basic types of reactions in which carbon is primarily involved.When carbon burns with oxygen present, heat and light are produced.
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identify the missing isotope in the following nuclear reactions. (appendix f in the textbook will help. n represents a neutron. use the format 1h for 1h.)
The isotope 9B is absent in the nuclear reactions 1H+0BeX+n.
Which three major isotopes are there?Protium, deuterium, and tritium are the three isotopes of hydrogen that are found in nature. These isotopes can also be identified by their mass number and element name. Nuclear transmutation reactions and nuclear decay reactions are the two main categories of nuclear reactions.
1 H has 1 proton, 1 electron, and 0 neutrons
and 9 Be has 4 protons, 4 electrons and 9−4=5 neutrons, so
X has 1+4=5 protons 1+4=5 electrons and 0+5−1=4 neutrons.
One of the neutrons is freed in the reaction. X must be boron with a molar mass of 5+4=9 g/mol: 9B.
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which of the following statements is/are true regarding the distribution of oceanic benthic biomass?
Concerning the distribution of marine benthic biomass, the following statement or claims about primary production are accurate.
What is a good example of productivity?Primary productivity is indeed the process through which organisms transform inorganic elements into straightforward organic materials. Autotrophs, or primary producers, are in charge of this phenomenon. Typical primary examples of producers include coccolithophores, dinoflagellates, and diatoms.
How is primary productivity calculated, and what does it mean?Water in which production is to be assessed is sealed in sealed white as well as dark containers that are painted dark to prevent light from entering. Rating scale can be estimated by the quantity of oxygen utilized by a size of water in a defined amount of time.
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Fossils provide scientists with a great deal of
information about prehistoric animals. There are two
types of fossils: body fossils and trace fossils.
Place each fossil under the correct category.
burrows
made by
ancient
animals
body fossils
fossilized
Diplodocus
egg
teeth
marks on
fossilized
trees
teeth of
Megalodon
trace fossils
Body fossils are animals, egg and teeth. Trace fossils are burrows and Diplodocus. An animal or plant from a previous geologic era that has been retained in the Earth's crust as a fossil.
What is fossil?An animal or plant from a previous geologic era that has been retained in the Earth's crust as a fossil, remnant, imprint, or trace. The main repository for knowledge regarding the evolution of life on Earth is the complex of information preserved in fossils found all across the planet.
Only a tiny percentage of extinct species have been retained as fossils, and often only those with a sturdy skeleton are capable of doing so. Body fossils are animals, egg and teeth. Trace fossils are burrows and Diplodocus.
Therefore, body fossils are animals, egg and teeth. Trace fossils are burrows and Diplodocus.
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Which of the following cleaves the pre-miRNA at the level of the loop, yielding a 22-nt, double-stranded RNA molecule?
DGCR8
Drosha
RISC
Dicer
Dicer cleaves the pre-miRNA at the level of the loop, yielding a 22-nt, double-stranded RNA molecule.
The pre-miRNA molecule is a precursor to the microRNA (miRNA), which plays an important role in gene regulation. The process of producing mature miRNA from pre-miRNA involves cleavage at specific sites, and this cleavage is facilitated by specific enzymes. DGCR8, Drosha, and RISC are all involved in the processing of pre-miRNA, but it is Dicer that performs the final step of cleaving the pre-miRNA at the level of the loop, yielding a 22-nt double-stranded RNA molecule. This double-stranded RNA molecule is then loaded into the RISC complex, which recognizes and cleaves specific target mRNAs, leading to regulation of gene expression.
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An empty container with a volume of 150.0 cm3 is weighed and found to have a mass of 72.5 g. The container is filled with a liquid and reweighed. The mass of the container and the liquid is 194.37 g. Determine the density of the liquid to the appropriate number of significant figures. (1 cm3 = 1 mL)
The density of the liquid is 0.8125 g/mL.
What is density?Density is the mass of a material substance per unit volume. d = M/V, where d is density, M is mass, and V is volume, is the formula for density. Grams per cubic centimeter are a typical unit of measurement for density. For instance, while Earth has a density of 5.51 grams per cubic centimeter, water has a density of 1 gram per cubic centimeter. Another way to state density is in kilograms per cubic meter (in meter-kilogram-second or SI units). For instance, air weighs 1.2 pounds per cubic meter. In textbooks and manuals, the densities of typical solids, liquids, and gases are stated. The mass of a body can easily be determined from its volume or vice versa using a density.
mass of liquid = (mass of container and liquid) - (mass of empty container)
mass of liquid = 194.37 g - 72.5 g = 121.87 g
The volume of the liquid is equal to the volume of the container, which is 150.0 ml. (1 cm3 = 1 mL)
The density of the liquid is the mass of the liquid divided by the volume of the liquid:
density = mass/volume
density = 121.87 g / 150.0 ml
density = 0.81 g/ml
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How many moles of O2 are needed to react with 7.00 moles of Al ?
As per the balanced reaction of Al and oxygen gas, 4 moles of Al needs 3 moles of oxygen gas. Hence, 7 moles of Al needs 5.2 moles of O₂.
What is aluminum oxide ?Aluminum metal is more reactive towards oxygen and it forms oxides on its surface. The balanced chemical equation of the reaction between Al and oxygen is written as follows:
[tex]\rm 4 Al + 3O_{2}\rightarrow2 Al_{2}O_{3}[/tex]
As per this reaction, 4 moles of aluminum needs 3 moles of oxygen molecule. Then, the number of moles oxygen molecule required to react with 7 moles of Al is :
no.of moles of O₂ = (7×3)/4 = 5.2
Therefore, 5.2 moles of oxygen gas is required to completely react with 7 moles of aluminum metal.
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Find the empirical formula of a compound that contains 54.04% calcium, 43.23% oxygen and
2.70% hydrogen.
Answer:
CaH2O2
Explanation:
ez
what are the net charges of the following five-amino-acids peptides at ph 1.0? (please explain and provide step-by-step solutions) (hints: you will need concepts from chapter 2, chapter 3, chapter 4-slides 2-4, 1st step: draw the detailed structures of the 5-amino-acids peptides; 2nd step: identify pka values and charges of all ionizable functional groups; 3rd step: determine the net charges ) gladv rakrq
Let's begin with a pH of 1. This results in a neutral protonated carboxyl and two positive protonated five-amino-acids peptides for a net charge of +2, as this pH is below any given pKa value.
What does a peptide charge look like at various pH levels?What are the following five-amino-acid peptides' net charges at ph 1.0?
The peptide has a net charge of -1 above a pH of about 8 and +1 below a pH of about 3.5.
What is the net charge of arginine at pH 1?+2 Since the pKa value of the amino group is higher than the pH, we anticipate that it will be protonated. The R-group is also protonated. Positive charges are present on the amino and R-group.
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calculate the amount of heat needed to boil of ethanol (), beginning from a temperature of . round your answer to significant digits. also, be sure your answer contains a unit symbol.
To calculate the amount of heat needed to boil of ethanol (CH3CH2OH), beginning from a temperature of, you can use the formula:
Q = m * c * ∆T where m is the mass of ethanol, c is the specific heat capacity of ethanol, and ∆T is the change in temperature.
So, for your example, the amount of heat needed to boil of ethanol is: Q = m * c * ∆T Q = ( ) * (2.44 J/g°C) * ( - ) Q = J
Be sure to include the unit symbol "J" when answering this question.
Ethanol boiling is the process by which ethanol, also known as ethyl alcohol, is heated to a vapor state. This occurs at a temperature of 78.4°C (173.2°F).
Ethanol is a compound with a relatively low boiling point, so it evaporates relatively easily when heated. This gives ethanol many of its useful properties, such as its use as a solvent, fuel, antiseptic and in the production of alcoholic beverages.
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Question 3
If we increase the temperature of the vessel to 450 K at constant volume, what
would the pressure inside the vessel be?
O 5 atm
O 20 atm
O 15 atm
O 10 atm
The new pressure of the gas is 15 atm. Option C
What is the new pressure?We know that the gas laws can be used to obtain the parameters that ahs to do with the idea gas and in this case we have to deal with the relationship of the pressure and the temperature of the gas at a constant volume.
We know that;
Given that;
P1/T1 = P2/T2
P1T2 = P2T1
P1 = initial pressure
P2 = final pressure
T1 = initial temperature
T2 = Final temperature
Thus;
P2 = 10 * 450/300
P2 = 15 atm
The pressure of the gas is 15 atm
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Missing parts;
We are studying the properties of a 10 L vessel of an ideal gas at 300 K and 10 atm of pressure inside. We can fix the volume or the pressure of the vessel as we like.
Question 3
If we increase the temperature of the vessel to 450 K at constant volume, what would the pressure inside the vessel be?
Group of answer choices
10 atm
5 atm
20 atm
15 atm