Platelet dense granules are storage organelles for which the substances released after activation is ADP, thromboxane A2, and FV.
Blood platelets are incredibly well-organized cells with a variety of organelles. Different sorts of components, some of which are at high concentrations, are stored in three distinct granule populations. Thus, platelets move some particular substances throughout the entire body. In the course of circulation, platelets respond to diverse stimuli and release the substances kept in the particular granules. A crucial stage of initial hemostasis is the "releasing reaction." Mitochondrial energy and the dense tubular system's messengers, which are needed for platelet reactivity, are delivered by these structures. Regarding the composition and function of the released elements, each granule population has unique characteristics. Small non-protein molecules are secreted by dense granules in order to draw in additional platelets. Large sticky and healing proteins are found in alpha-Granules.
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Which of these statements is true of a polymer? a. The subunit is always an atom. c. The subunit is always a molecule. b. Polymers cannot extend forever. d. The subunit can be a molecule or an atom.
Answer: C - Subunit (Monomer) is always a molecule
Explanation: To narrow this down, b, cannot be the answer because it is known that Polymers can extend forever with enough materials present.
It cannot be d) or a) because atoms need to have full bonds, that is, a subunit must be bonded to other units to even be considered a subunit. So it must be c) because a subunit must have full bonds. If you are talking about organic polymers, at the very least, subunits must be bonded with hydrogens, subunits cannot just be carbon atoms, same thing goes with inorganic subunits
Hope this helped and good luck with Chem!
Classify the following molecular views as representing either a physical change or a chemical change.
Changes in Chemistry:
In chemistry, there is a change in the identity of a substance only if there is a combination of one substance with any other substance. This cause the occurrence due to chemical synthesis.
The statement "In chemistry, there is a change in the identity of a substance only if there is a combination of one substance with any other substance. This cause the occurrence due to chemical synthesis" describes a chemical change.
A chemical change is a change in which one or more substances are transformed into one or more different substances through chemical reactions. This is characterized by a change in the chemical properties or composition of a substance. The statement "In chemistry, there is a change in the identity of a substance only if there is a combination of one substance with any other substance. This cause the occurrence due to chemical synthesis" describes a chemical change because it highlights that in order for a change to be considered chemical, it must involve a combination of two or more substances forming a new substance through a chemical reaction. This new substance will have different properties and characteristics than the original substances, thus a change in the identity of a substance. Examples of chemical changes are combustion, rusting, photosynthesis, and digestion.
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given below are two statements : one is labelled as assertion a and the other is labelled as reason r. assertion a : dacron is an example of polyester polymer. reason r : dacron is made up of ethylene glycol and terephthalic acid monomers. in the light of the above statements, choose the most appropriate answer from the options given below.: Both A and R are correct but R is NOT the correct explanation of A.
B
A is correct but R is not correct
C
Both A and R are correct and R is the correct explanation of A.
D
A is not correct but R is correc
C Both A and R are correct and R is the correct explanation of A. r. assertion a dacron is an example of polyester polymer. reason r dacron is made up of ethylene glycol and terephthalic acid monomers.
in the light of the above statements, Dacron or terylene (a polyester) is created by the condensation polymerization of ethylene glycol and terephthalic acid with the removal of the water molecule.one is labelled as assertion a and the other is labelled as reason r. assertion a : dacron is an example of polyester polymer. reason r : dacron is made up of ethylene glycol and terephthalic acid monomers. The reaction occurs at 420 - 460 K temperature with zinc acetate and antimony trioxide as catalysts. Dacron, commonly known as Terylene, is a polymer made by polymerizing ethylene glycol and terephthalic acid. erylene is a polyester that is also known as Dacron. It is created by the condensation of ethylene glycol with p-terephthalic acid (1,4-benzene dicarboxylic acid). As a result, condensation polymerization will occur.
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Chemistry final
HELP!!!!HELPP please
1) Shown in the image attached
2) Shown in the image attached
3)
a) Copper II sulfate
b) Aluminum chloride
c) Barium nitride
d) Iron III oxide
e) Lithium fluoride
4) Shown in the image attached
What are isotopes?We know that isotopes are the atoms that have the same atomic number but note the same mass number. The models of the isotope Lithium -8 is shown in the image attached.
The orbital diagram shows the arrangement of the elements that are in the atom. The orbital diagrams of nitrogen is shown in the image attached.
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A mass is recorded as 15.02 g. Given the accepted level of uncertainty in any recorded measurement, select the range in which this mass will fall.O 15.01 - 15.03 gO 15.00 - 15.10 g O 14.92 - 15.12 g O 14.95 - 15.05 g
A mass is recorded as 15.02 g. Given the accepted level of uncertainty in any recorded measurement, The correct answer is 15.01 - 15.03 g.
The accepted level of uncertainty in any recorded measurement is typically given as the number of significant figures in the measurement. In this case, the mass is recorded as 15.02 g, which has three significant figures. This means that the true value of the mass could be anywhere within ±0.01 g of the recorded value. Therefore, the range in which this mass will fall is 15.01 - 15.03 g.
Option-15.00 - 15.10 g is not correct as it is greater than ±0.01 g
Option-14.92 - 15.12 g is not correct as it is greater than ±0.01 g
Option-14.95 - 15.05 g is not correct as it is not including the recorded value 15.02g
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Question:
Define the following terms associated with titration:
A) Standard solution
B) Endpoint
C) Indicator
Titration
Chemical titrations are reactions performed to determine some property of a solution. In a titration experiment, there are two solutions. In one solution a property is known, and that property is used to discover something about the other solution. Often, a preset volume of the known solution is required to bring about a certain change in the unknown solution.
A titration is a method where the concentration of an unknown solution is ascertained by comparing it to a solution of known concentration.
What is the term titration?Titration is a method of chemical analysis where the amount of a sample's ingredient is determined by adding an exact known amount of a different substance to the measured sample, which the desired constituent reacts with in a specific, known proportion.
An acid-base titration involves gradually adding an unknown base to an acid solution with a known concentration (a standard solution) (or vice versa). To the base, you add a few drops of indicator solution. When the base has been neutralized (when [H+] Equals [OH-]), the indicator's color will change to indicate this. A substance's color changing due to a chemical reaction is an indicator. The pH affects the color of an acid-base indicator, such as phenolphthalein. It is also used redox indicators.
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A positively charged sphere A is brought close without touching to a neutral sphere B. Sphere B is touched with a grounded wire. What is the charge on sphere B after the wire is removed?
The contact of the charged aluminum plate with the neutral metal spherical causes it to become charged.
What occurs when two spheres with different charges come into contact?Contact between a charged object and a neutral object constitutes charging by conduction. Consider touching a neutral metal sphere with an aluminum plate that is positively charged. The contact of the charged aluminum plate with the neutral metal spherical causes it to become charged.The positive charges on a positively charged conducting sphere will migrate in the direction of the uncharged conducting sphere when it is brought close to (but not touching) an uncharged conducting sphere (that is, one with no excess charge).The contact of the charged aluminum plate with the neutral metal spherical causes it to become charged.To learn more about spheres refer to:
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If 25.0 grams of water at 100°C are heated at a constant rate of 400.0 joules/minute, calculate the time needed
to vaporize the sample completely. SHOW WORK.
I need help please
If 25.0 grams of water at 100°C are heated at a constant rate of 400.0 joules/minute, 56425J needed to vaporize the sample completely.
What is vaporization?
The process of converting a substance from its liquid or solid state into its gaseous (vapor) state is known as vaporization. Boiling is the process of vaporizing a liquid when the environment permits the development of vapor bubbles inside the liquid. Sublimation is the direct transformation of a solid into a vapor.
What is grams?
The gram is a unit of mass in the International System of Units (SI) that is equal to one thousandth of a kilogram. It was originally known as the gramme. Gram. This pen cap weighs around one gram.
Amount of heat required to convert 25g of water at 100°
C to 25g of steam at 100°
C =25×2257J=56425J
Therefore, If 25.0 grams of water at 100°C are heated at a constant rate of 400.0 joules/minute, 56425J needed to vaporize the sample completely.
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Who developed the Billard Ball Theory?
Answer:
John Dalton
Explanation:
which of the following is a product formed when 3-methylpentane is brominated under free radical conditions, then treated with naoch3, and then o3 followed by dimethyl sulfide? co2
Which of the following results from the reaction of 4-bromo-3-methyloctane with NaOCH3 O3 and dimethyl sulphide 1) Br NaOCH Og2)DMS o о
DMSP, a significant secondary metabolite in some marine algae, is the main source of DMS. The most common biological sulphur molecule released into the atmosphere is DMS [4]. [5] Phytoplankton emits gases throughout the oceans [6]. DMS is furthermore created naturally when dimethyl sulfoxide (DMSO) waste that is dumped into sewers undergoes bacterial conversion. This waste can lead to environmental odour issues. Diverse sulfur-containing chemicals, including sulphur dioxide, dimethyl sulfoxide (DMSO), dimethyl sulfone, methanesulfonic acid, and sulfuric acid, are produced when DMS is oxidised in the marine environment. [8] Among these substances, sulfuric acid has the capacity to produce fresh aerosols that serve as the basis for cloud condensation. Sulfate particles often develop in the troposphere as a result. Due to this
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The balanced equation for the decomposition of sodium bicarbonate is 2NaHCO3(s) ---> Na2CO3(s) +H2O(g) +CO2 (g),ΔH
=129.2.
Using the enthalpies of formation, calculate the enthalpy of formation of sodium bicarbonate.
Because of this, it is calculated that -1013 kJ/mol is required to produce NaHCO3 N a H C O 3 from its component elements.
How does sodium bicarbonate decompose according to a balanced equation?The balanced reaction for sodium bicarbonate, NaHCO3, which decomposes when heated to create carbon dioxide, CO2, is 2 NaHCO3(s) Na2CO3(s) + H2O(l) + CO2. Baking soda, also known as sodium bicarbonate, is used for a variety of things, including doughnuts and quick breads, where it acts as a leavener.Because of this, it is calculated that -1013 kJ/mol is required to produce NaHCO3 N a H C O 3 from its component elements.For baked items, we typically use sodium bicarbonate (NaHCO3) (N a H C O 3). Sodium carbonate (Na2CO3), carbon dioxide, and water are the products of heating baking soda.To learn more about sodium bicarbonate refer to:
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a student is given the task of determining the molar concentration of a cuso4 solution using two different procedures precipitation and spectrophotometry
The correct option which can help in defining this question is- M1V1 = M2V2 50 X 0.05 = 0.1 X V2 V2 = 25 ml H
Procedure for precipitation:
In this procedure, the Cuso4 solution is mixed with a known quantity of potassium chromate (K2CrO4). A yellow precipitate develops as a result. Filtering the solution and drying the precipitate yields the amount of this precipitate. The molar concentration of the solution is then determined using the mass of the precipitate.Procedure for Spectrophotometry:
The method of spectrophotometry is used to gauge how much light a sample has absorbed. A specific wavelength of light is used in this process to pass through the Cuso4 solutionThe solution's molar concentration is then determined by measuring the amount of light that is absorbed.The molar concentration of the Cuso4 solution can be calculated by combining the outcomes from both the precipitation and spectrophotometry procedures.To know more about molar concentration here
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in his atomic theory, dalton proposed that all atoms of a given element are identical. which of the following observations provides the best evidence that the proposal is incorrect?
In his atomic theory, Dalton postulated that every atom of a specific element is identical. Given that CuCu's mass spectrum has two peaks, one at 63 amu and the other at 65 amu, option b is correct.
A scientific theory addressing the composition of matter was put forth by English physicist and chemist John Dalton in 1808. It asserted that the fundamental units of matter are minute, indivisible particles known as "atoms." The number of protons in the nucleus of a pure substance, or chemical element, comprised exclusively of one species of atoms, is known. Chemical elements, as opposed to chemical compounds, cannot be reduced through any chemical process to less complicated molecules.
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The complete question is -
a) The mass spectrum of CuCu has a peak at 123amu and another peak at 26amu.
b) The mass spectrum of CuCu has a peak at 63amu and another peak at 65amu.
c)The mass spectrum of CuCu has a peak at 89amu and another peak at 69amu.
which statement is true in electrophilic aromatic substitution no meta directors have a nitrogen atom directly attached to the ring
The statement is true in electrophilic aromatic substitution is no meta directors have the nonbonding electrons on the atom that is directly attached to ring.
The electrophilic aromatic substitution reaction is an organic reaction. In this the electrophile replace an atom that is attached to an aromatic ring. The types of electrophilic aromatic substitution reactions are :
Electrophilic aromatic halogenation reactionsAromatic nitration reactionsAromatic sulfonation reactionsFriedel crafts alkylation reactionFriedel crafts acylation reactionThus, no meta directors have the nonbonding electrons on the atom that is directly attached to ring in the electrophilic aromatic substitution reaction. The substituents present on aromatic ring influence the reactivity.
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In each of the following pairs, circle the species with the higher ionization energy: a) Li or Cs b)Cl^- or Ar c) Ca or Br d) Na^+ or Ne e) B or Be
Circle the species with the greater ionisation energy in each of the pairings below: (a) Li, (b) Ar, (c) Br, (d) Ne, (e) Be. Ionization potential, also known as ionisation energy.
The amount of energy needed in physics and chemistry to take one electron out of a single atom or molecule. Ionization energy is the quantity of energy needed to dislodge the most loosely bound electrons from the outermost shell of an isolated gaseous atom of an element. The amount of energy needed to ionise an isolated gaseous atom is known as the ionisation energy. More energy is needed to free this outermost electron from the nucleus the more securely it is bonded. Ionization energy is often measured in electronvolts (eV) or joules in physics (J). The energy required to ionise a mole of atoms or molecules is given in chemistry as kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol), respectively.
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Which one of the following is not a valid value for the magnetic quantum number (ml) of an electron in a 5d subshell?A. 0B. -1C. 3D. 2
3 is not a valid value for the magnetic quantum number (ml) of an electron in a 5d subshell.
What is Quantum number?Quantum number is a mathematical concept used to describe the state of a quantum mechanical system, such as an electron in an atom. It is a numerical representation of the energy, angular momentum, and other properties that describe a quantum system. Quantum numbers are used to identify individual particles and to determine which energy levels of the system are available to the particle. They are essential for understanding the structure and behavior of atoms and molecules.
The magnetic quantum number (ml) describes the orbital angular momentum of an electron, and it has a maximum value of ml = l = 2 for the 5d subshell. Therefore, the only valid values for ml in a 5d subshell are -2, -1, 0, 1, and 2, so C. 3 is not a valid value.
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Solid phosphorus and chlorine gas react to form solid phosphorus pentachloride. Suppose you have 9.0 mol of P and 2.0 of Cl2 in a reactor. Calculate the largest amount of PCl5 that could be produced. Round your answer to the nearest 0.1 mol.
Solid phosphorus and chlorine gas react to form solid phosphorus pentachloride. the largest amount of PCl5 that could be produced is 0.5 mol.
The balanced equation for the reaction of solid phosphorus and chlorine gas to form solid phosphorus pentachloride (PCl5) is:
P4 + 10Cl2 -> 4PCl5We know that we have 9.0 moles of P and 2.0 moles of Cl2 in a reactor. To calculate the largest amount of PCl5 that could be produced, we need to use the limiting reagent. The limiting reagent is the reactant that will be completely consumed before the other reactant.To find the limiting reagent, we can find the ratio of reactant to product for each reactant. For P: 4 moles P/4 moles PCl5 = 1
For Cl2: 10 moles Cl2/4 moles PCl5 = 2.5
The limiting reagent is the reactant with the lowest ratio. In this case, Cl2 is the limiting reagent as it is the reactant that limits the amount of product.So we know that 2.0 moles of Cl2 are present and that 10 moles of Cl2 are required for every 4 moles of PCl5 formed.
2 moles of Cl2 = 0.5 moles of PCl5. Therefore, the largest amount of PCl5 that could be produced is 0.5 mol.
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at low temperatures and high pressures ethen gas, c2h4, does not behave like an ideal gas. use chemical principles to explain why this is.
At low temperature and high pressure Ethane gas doesn't not behave like Ideal gas because of its larger molecular size.
Ideal gas is a theoretical gas composed of many randomly moving particles. Ideal gases are called as hypothetical gases which do not exist in nature. Gases exhibit ideal behavior at certain conditions. Ideal gases are assumed to have no interactions among the molecules. The volume of the gases is negligible with respect to the total volume. At low temperature and high pressures the molecules of a gas are very close at each other such that the volume of the gas molecules become significant. The interactions between the atoms become strong enough to affect their properties.
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Calculate how many grams of Aluminum are needed to produce 21.6 grams of Aluminum oxide (Al2O3).
4Al + 3O2 → 2Al2O3
a
11.43 g Al
b
26.982 g Al
c
5.71 g Al
d
132 g Al
Answer: A. 11.43 g Al
Explanation:
To solve this problem, we need to use the process of dimensional analysis, which essentially turns all of the values into fractions that will cancel out units. We always start by using what we are given and then set up the units so that everything cancels besides what we need to solve for.
given Al2O3 g * (1molAl2O3/mass Al2O3 for periodic table) * (Al mole ratio from balanced equation / Al2O3 mole ratio from the balanced equation) * ( Al mass from periodic table / 1 mol Al)
Now, I will plug all values in and solve.
21.6 gAl2O3 * (1molAl2O3/ 101.96 g Al2O3) * (4 mol Al / 2 mol Al2O3) * (26.98 g Al / 1 mol Al)
Now, multiply across the numerator and denominator separately and then proceed with division.
11.43 g Al
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which of the following structures are meso compounds? b, d and e only a and e only d and e only b only
B and D parts are Meso compounds from the structures attached below.
Meso compounds need to contain two or more chiral centers and a symmetry plane that splits the molecule in half. We can only refer to a chemical as a meso compound if it can meet these two requirements.
Part-A-The questioned chemical lacks a plane of symmetry yet contains three chiral centers. It is not a meso compound as a result.
Part-B-In this instance, the molecules have a plane of symmetry and three chiral centers. It is a meso compound as a result.
Part-c-Three chiral centers are present in this chemical, however the symmetry plane is not present. It is not a meso compound as a result.
Part-D-Three chiral centers and one plane of symmetry may be found in this chemical. It is a meso compound as a result.
Part-E-The provided molecule is not a meso compound since it lacks a plane of symmetry.
Part-F-In this instance, a plane of symmetry exists, but there is only one chiral center. It is not a meso compound as a result.
complete question:attached below.
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what would be the moles, of 1.20 g of sulfur dioxide?
Answer:
[tex]\huge\boxed{\sf n=0.019 \ mol}[/tex]
Explanation:
Given Data:Mass in grams = m = 1.20 g
Molar mass of SO₂ = M = 32 + (16 × 2)
= 32 + 32
= 64 g/molRequired:No. of moles = n = ?
Formula:[tex]\displaystyle n=\frac{m}{M}[/tex]
Solution:[tex]\displaystyle n = \frac{1.20}{64} \\\\n=0.019 \ mol\\\\\rule[225]{225}{2}[/tex]
the reaction of 1-bromopropane and sodium hydroxide in ethanol occurs by an sn2 mechanism. what happens to the rate of this reaction under the following conditions? if we take half of the already prepared solution to perform the reaction, the reaction rate will be , compared to the previous experiment.
The rate of reaction, when half of the prepared solution is used to perform the reaction, gets reduced to half of it's initial value.
The SN2 reaction is a type of nucleophilic substitution reaction where a bond between the atoms of a reactant is broken and another one is formed synchronously. The two reacting species are involved together in the rate determining step of the reaction. The term 'SN2' in SN2 reaction stands for – Substitution Nucleophilic Bimolecular.
The reaction of organic compound 1-bromopropane with an inorganic compound sodium hydroxide gives propan-1-ol and NaBr.
CH3CH2CH2Br + OH- → CH3CH2CH2OH + Br-
Now according to the Le Chatelier's principle of Equillibrium;
when the concentration of the reactants is reduced the rate of the reaction is also reduced in accordance with the order of reaction.
The SN2 reactions are first order reactions and the rate of reaction is directly proportional to the order of reaction.
Now as the solution prepared is added in the reaction, the concentration of reactants gets reduced and so thus the rate of reaction. The order of reaction is 1. Hence the rate of reaction is reduce to half itself.
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N2 + 3H2 → 2NH3
How many moles of N2 do you need to react with 10.5 moles of H2?
a
3.5 mol
b
31.5 mol
c
15 mol
d
9 mol
According to the stoichiometry of the given chemical reaction, 3.5 moles of nitrogen will react with 10.5 moles of hydrogen.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
According to the given chemical reaction, 1 mole of nitrogen reacts with 3 moles of hydrogen , thus, 10.5 moles of hydrogen will require 10.5/3=3.5 moles.
Thus,3.5 moles of nitrogen will react with 10.5 moles of hydrogen.
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a mixture containing equal numbers of moles of ethyl acetate and butyl acetate was separated using distillation. based on the diagrams, which of the following identifies the substance that would be initially present in higher concentration in the distillate and correctly explains why that occurs?
The substance that would be initially present in higher concentration in the distillate is the component with the lower boiling point.
During distillation, a mixture is heated, and the components of the mixture vaporize at different temperatures. The component with the lower boiling point will vaporize at a lower temperature than the component with the higher boiling point. When the vapor is condensed, it will be in the form of a liquid that contains a higher concentration of the component that had a lower boiling point.In the case of a mixture containing equal numbers of moles of ethyl acetate and butyl acetate, Ethyl acetate has a boiling point of 77°C while Butyl acetate has a boiling point of 126°C. Therefore, Ethyl acetate would be the component that would be initially present in higher concentration in the distillate because it has a lower boiling point than butyl acetate and will vaporize at a lower temperature.
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lithium, cesium, potassium, sodium, rubidium place the elements above in order from smallest atomic radius to largest atomic radius: place the elements above in order from smallest ionization energy to largest ionization energy: place the elements above in order from smallest electronegativity to largest electronegativity:
Smallest atomic radius to largest atomic radius: sodium, potassium, rubidium, cesium, lithium
What is atomic radius?
Atomic radius is a measurement of an atom's size. It is usually determined by the distance between the nucleus and the outermost electron shell of an atom. Atomic radius is measured in picometers (pm), which is one trillionth of a meter. Generally, the larger the atomic radius, the larger the atom.Atomic radius is related to the element's atomic number, which is the number of protons in the nucleus of an atom.
Smallest atomic radius to largest atomic radius: sodium, potassium, rubidium, cesium, lithium
Smallest ionization energy to largest ionization energy: sodium, potassium, rubidium, lithium, cesium
Smallest electronegativity to largest electronegativity: sodium, potassium, rubidium, lithium, cesium
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Number of electrons in element F-
Answer:
10
Explanation:
Fluorine has 9 electrons but now it is in its ionic state and the charge is -1 which means it gained one more electron to make it ten
Consider the previous question again. If 3 moles of MgCl2 are put in a Liter of water then which of the following statements is TRUE? (Mark all that are TRUE...there may be more than one).a. The solution would have a molarity of 1 b. The solution would have a molarity of 3 c. The solution would have an osmolarity of 3 d. The solution would have an osmolarity of 6 e. The solution would have a molarity of 6 f. The solution would have a molarity of 1.5 g. The solution would have an osmolarity of 1.5 h. The solution would have an osmolarity of 9
If 3 moles of MgCl₂ are put in the liter of the water then the true statement are :
d) True
e) True
f) True
g) True
h) True
The true statements are given below if the 3 moles of MgCl₂ are put in the liter of the water :
d) The solution would have an osmolarity of 6
e) The solution would have a molarity of 6
f) The solution would have a molarity of 1.5
g) The solution would have an osmolarity of 1.5
h) The solution would have an osmolarity of 9
The molarity can be calculated by the following formula :
Molarity = moles / volumes in L
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What type of radioactive decay is illustrated by the following nuclear equation? N ->0 + e positron emission b. alpha decay beta decay gamma production helium emission wnar nroni Search
A nuclear equation can be used to represent alpha decay. If the total numbers of protons and neutrons on both sides of the arrow are equal, the equation is balanced.
While all radioactive decay poses a threat to life, alpha decay poses the least threat. beta decay The transformation of the uranium-238 nucleus into the thorium-234 nucleus is an illustration of this decay. Half-lives are another unit used to express the rate of nuclear decay. A particular isotope's half-life is the amount of time it takes for its radioactivity to decay by half. A radioisotope having a half-life of 14 days will have had half of its atoms decay within that time frame. For instance, after generating intermediates like Uranium-234, Thorium-230, and Lead-206, the decay chain that starts with Uranium-238 ends in Lead-206.
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A chemist adds 215.0 mL of a 3.0 mol/L sodium nitrate (NaNO3) solution to a reaction flask. Calculate the mass in grams of sodium nitrate the chemist has added to the flask. Round your answer to 2 significant digits. x10 X S
The chemist added 6.44 g of sodium nitrate to the reaction flask by adding 215.0 mL of a 3.0 mol/L sodium nitrate solution.
when we are dealing with a solution, the concentration is usually measured in molarity (mol/L) which is the number of moles of solute (the substance being dissolved) per liter of solvent (the essence doing the dissolving). In this case, the solution is 3.0 mol/L, which means there are 3.0 moles of sodium nitrate in every liter of solution.
The volume of the solution added to the reaction flask is 215 mL, equivalent to 0.215 L.
By multiplying the concentration (3.0 mol/L) by the volume (0.215 L) we get the number of moles of solute in the solution.
In this case, 3.0 x 0.215 = 0.645 moles of sodium nitrate
The molar mass of sodium nitrate is 84.99 g/mol, which is the mass of one mole of the substance. By multiplying the number of moles of sodium nitrate by its molar mass, we can find the mass of sodium nitrate added to the flask.
0.645 moles x 84.99 g/mol = 54.79 g.
So, in summary, the chemist added 6.44 g of sodium nitrate to the reaction flask by adding 215.0 mL of a 3.0 mol/L sodium nitrate solution.
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Why don't atoms collapse if they are mostly empty space?
Atoms don't even collapse in a vacuum. Because atoms are completely packed with scattered electrons, they are unable to contract. If the majority of an atom's surface area were empty space.
We could make atoms smaller. There is no empty space within an atom. Atoms are completely filled with widely spaced out electrons, making it difficult for them to contract. Electrons are located in the area termed the electron cloud that surrounds the nucleus of an atom. The set of primary particles that comprise an atom includes many other particles than the electron. Like other elementary particles, electrons can collide with other particles and, when they are diffracted, exhibit wavelike characteristics.
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