select the best explanation for why methanol, ch3oh, cannot be used as a solvent for the deprotonation of a terminal alkyne by sodium amide, nanh2.
Answer:
d. Methanol is more acidic than the alkyne and will be deprotonated instead.
Explanation:
because acidity is the ability to lose H+, leaving an anion behind; acidity depends on the stability of the anion.
Potassium-40 (40k) is a radioactive material that decays into argon-40 (40ar). the half-life of a sample of 40k is 1.3 billion years. rocks containing 40k have been around since the formation of the earth, and 40ar gas has been accumulating in those rocks since the earth formed. however, when rocks are heated by volcanic action, all the 40ar leaves the rock when the gases escape. create a scenario and discuss, based on your knowledge of half-life, the value of potassium-argon dating to geologists.
The Potassium-40 (40k) is a radioactive material that decays into argon-40 . the half-life of a sample of 40k is 1.3 billion years. the potassium - argon dating is the method that based on the radiometric dating.
The potassium - argon dating is the type of the geological method that is based on the radiometric dating. it detect the volcanic ash of rocks. the principles it is based on the is the radioactive disintegration. the half life of the sample is 1.3 billion years. the radioactive potassium isotope that is potassium 40 is in volcanic rocks. this will disintegrate at the known rate is inert gas that is argon 40.
The gas will be accumulated in the rock crystal. and determine several billions years. the potassium found in the micas, hornblendes and the feldspars.
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HELP THIS IS DUE SOON AND I HAVE MORE WORK TO DO
Answer:
A
Explanation:
Most of the world's active volcanoes are located along or near the boundaries between shifting plates and are called "plate-boundary" volcanoes.
What is the primary source of energy on Earth?
Answer:
the sun
Explanation:
edge 2020
I’m not sure what the answer is
a chemical (e.g., co2) represents the elementary composition of any pure substance.
A chemical formula represents the elementary composition of any pure substance. The best answer to fill the blank is formula.
A chemical formula uses chemical symbols to denote the types of atoms and numerical subscripts to indicate the number of each atom in the molecule. In the example given, CO2 represents carbon dioxide, which is a compound composed of one carbon atom (C) and two oxygen atoms (O). The subscript "2" indicates that there are two oxygen atoms for each carbon atom.
By knowing the chemical formula of a substance, we can determine the elements it contains and the relative proportions of those elements. Chemical formulas provide essential information about the composition of a substance at the elemental level, allowing us to understand its properties and behavior.
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_____ use boxes to represent the various positions or departments within a firm and lines to connect the boxes, indicating who reports to whom..
This diagrammatic representation is called an organizational chart or an organogram.
Organizational charts use boxes or rectangles to represent positions or departments within a firm, and lines or arrows to connect them, indicating the reporting relationships and hierarchy within the organization. Organizational charts can vary in complexity depending on the size and structure of the firm. They provide a visual representation of the reporting relationships and help individuals understand the hierarchy and structure of the organization.
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Given the following information:
Heat of sublimation of Li(s) = 166 kJ/mol
Bond energy of HCl = 427 kJ/mol
Ionization energy of Li(g) = 520. kJ/mol
Electron affinity of Cl(g) = -2349 kJ/mol
Lattice energy of LiCl(s) = -2829 kJ/mol
Bond energy of H₂ = -432 kJ/mol
Calculate the net change in energy for the following reaction:
2Li(s) + 2HCl(g) --> 2LiCl(s) + H₂(g)
Answer:
Ya'll should really practice more because things like these are easy
Explanation:
You guys need to practice more since stuff like this are pretty simple.
What is net change?According to the net change theorem, the ultimate value of a quantity equals the beginning value plus the integral of the rate of change when a quantity changes. The net change can be positive, negative, or zero.The term "Net Change in Cash" indicates how much Cash and Cash Equivalents changed in value during the reporting period. It is the main punchline of the Cash Flow Statement. Net Cash Change quantifies how much the value of Cash and Cash Equivalents changed during the reporting period. The main punchline on the Cash Flow Statement is this. When using net cash as a barometer to determine a company's financial health, it is critical to analyse what activities contribute to positive or negative net cash.To learn more about net change refer to:
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using this information answer the following questions and submit your responses: what is the law of the conservation of mass and how does it relate to chemical equations? why is it necessary to balance a chemical equation? what role do coefficients play in balancing a chemical equation? how is mass conserved when a substance has a physical or chemical change?
The Law of Conservation of Mass states that mass cannot be created or destroyed in a chemical reaction; it can only be changed from one form to another.
This means that the total mass of substances before the reaction is the same as the total mass of substances after the reaction. Balancing a chemical equation ensures that the Law of Conservation of Mass is observed. It ensures that the same amount of each element that was present before the reaction is also present after the reaction.
Coefficients are used to balance chemical equations. They are placed in front of the reactants and products in a reaction to ensure that the number of atoms of each element on the left side of the equation is equal to the number of atoms of each element on the right side.
In a physical or chemical change, the mass of the reactants is equal to the mass of the products. This is because mass is conserved according to the Law of Conservation of Mass, and so no matter what form a substance takes, the same amount of mass will remain.
However , In a chemical change, the mass of the reactants is equal to the mass of the products obtained from the reaction. Thus, mass is always conserved during a physical or chemical change.
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Which of the following examples is a compound containing an ionic bond?
O A. 0₂
о B. H20
O C. Cao
OD. CHA
Metals and non-metals come together to produce CaO ionic bonds. The only metals and non-metals, respectively, are calcium and oxygen. The remaining choices are covalent bonding (bonds between non-metals).
Ionic bonds, also known as electrovalent bonds, are a type of linkage created in a chemical molecule by the electrostatic attraction of ions with opposing charges. When the valence (outermost) electrons of one atom are permanently transferred to another atom, a bond of this kind is created.The exchange of one or more electrons between atoms results in the formation of ionic bonds between two or more atoms. Positive ions called cations and negative ions called anions are created during electron transfer. Ionic materials can be found as crystalline solids.For more information on ionic bonds kindly visit to
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what is the scientific name for the layer of gas that surrounds the earth A. hydrosphere B. biosphere C. atmosphere D. lithosphere
Answer:
hydro
Explanation: hydrogen
Answer:
C. Atmosphere
Explanation:
First, let’s define each answer choice.
Hydrosphere: all of the water on Earth
Biosphere: the global ecosystem where organisms live
Atmosphere: the envelope of gases around the planet
Lithosphere: the outermost part of the Earth( the crust and upper mantle)
The question asks us to find the scientific name for the layer of gas that surrounds the Earth. The best choice is C. Atmosphere.
Describing Metallic Bonding Theories
Which statements describe the electron sea
model? Check all that apply.
Electrons all have approximately the same
energy.
Electrons move among orbitals of different
energies.
Electrons move freely among atoms
(delocalized)
Answer:
A. Electrons all have approximately the same energy.
C. Electrons move freely among atoms (delocalized).
Next Question:
B. Electrons move among orbitals of different energies.
C. Electrons move freely among atoms (delocalized).
Explanation:
Electron sea model
Electrons move freely among atoms (delocalized).Electrons all have approximately the same energy.Metallic Band theory
Electrons move among orbitals of different energies.Electrons move freely among atoms (delocalized).Electron sea model is one of the simplest form of metal bonding model. Its bonding is as a result of the sharing of valence electrons. The electrons here are delocalized which serve as the gum that keeps the metal atoms together.
Conclusively, we can say Electron sea model
Electrons move freely among atoms (delocalized).Electrons all have approximately the same energy.Metallic Band theory
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environmentalists, worried about sulfur dioxide in the air, pressure the government to require bus manufacturers to modify exhaust systems in buses. in this situation,
The government is being pressured by environmentalists to require modifications to bus exhaust systems due to concerns about sulfur dioxide in the air.
In this situation, environmentalists are expressing their concerns about sulfur dioxide pollution in the air and advocating for stricter regulations on bus manufacturers to modify their exhaust systems.
Sulfur dioxide is a harmful air pollutant that is primarily released from burning fossil fuels, particularly in vehicles and industrial processes. It is known to contribute to respiratory problems, acid rain formation, and environmental degradation.
By pressuring the government to enforce modifications in bus exhaust systems, environmentalists aim to reduce sulfur dioxide emissions from buses, which can significantly contribute to air pollution in urban areas.
These modifications may involve the installation of advanced pollution control technologies such as catalytic converters or particulate filters to minimize the release of harmful pollutants, including sulfur dioxide.
The action taken by environmentalists and the government's response demonstrate a proactive approach towards addressing environmental concerns and promoting cleaner and healthier air quality for the community.
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bromothymol blue (btb) is a chemical that indicates the presence of carbon dioxide in water. if a beaker of water is mixed with btb, what color will water turn to determine if there is a large amount of carbon dioxide present in the water
An indicator dye called bromothymol blue (BMB) turns yellow in the presence of an acid. The pH of the solution is lowered when carbon dioxide is added because carbonic acid is formed as a result.
What takes place when carbon dioxide and bromothymol blue interact?An indicator dye called bromothymol blue (BMB) turns yellow in the presence of an acid. The pH of the solution is lowered when carbon dioxide is added because carbonic acid is formed as a result.
What shade of blue does bromothymol take on in hydrochloric acid?Bromothymol blue with concentrated hydrochloric acid is the magenta color on the left. Bromothymol blue can be used as a respiratory indicator or for monitoring photosynthetic processes (turns yellow as CO 2 is added). Exhaling via a tube into a neutral BTB solution is a typical way to demonstrate BTB's pH indicator abilities.
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Which of the following best describes an acyl substituent effect in an electrophilic aromatic substitution reaction?
A) activating and ortho/para directing
B) activating and meta directing
C) deactivating and ortho/para directing
D) deactivating and meta directing
E) no effect on benzene
The acyl substituent effect in an electrophilic aromatic substitution reaction is deactivating and meta-directing. Therefore, the correct option is (D) deactivating and meta-directing.
An electrophilic aromatic substitution (EAS) reaction is a type of organic reaction that involves the substitution of an aromatic hydrogen atom with an electrophile.
The electrophile attacks the aromatic ring, forming a positively charged intermediate, which is then stabilized by a nearby electron-donating group (if present) or a neighboring double bond. This type of reaction is commonly used in the synthesis of a variety of organic compounds, including pharmaceuticals, dyes, and polymers
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Calculate the mass of 4.95 x 10^15 Ag atoms
Answer:
8.87 × 10⁻⁷ grams
Explanation:
Moles = No. of Particles / 6.022 × 10²³ Particles/mol
Moles = 4.95 × 10¹⁵ atoms / 6.022 × 10²³ atoms/mol
Moles = 8.22 × 10⁻⁹ mol
Also,
Mass = Moles × M.Mass
Mass = 8.22 × 10⁻⁹ mol × 107.87 g/mol
Mass = 8.87 × 10⁻⁷ grams
calculate and record the following data in the table. name propane butane methane molar volume (l/mol) average molar volume (l/mol)
Name Molar volume(L/mol) Average Molar volume(L/mol)
Propane 22.045 987.6
Butane 23.43 1303.8
Methane 22.37 359.3
How is the Molar volume calculated ?Molar volume is directly proportional to molar mass and inversely proportional to density. The formula for molar volume is expressed as:
\(Vm = \frac{Molar mass}{Density}\)
where,
\(Vm\) is the molar volume of the substance
For Propane : The molar mass of propane is 44.09 g/mol
The Density of propane is 2 kg/m³
Therefore,
\(Vm = \frac{Molar mass}{Density}\)
\(Vm\) = 44.09 / 2
Hence, Molar volume is 22.045 L/mol
For Butane :
The molar mass of butane is 58.12 g/mol
The Density of butane is 2.48 kg/m³
Therefore,
\(Vm = \frac{Molar mass}{Density}\)
\(Vm\) = 58.12 / 2.48
Hence, Molar volume is 23.43 L/mol
For Methane :
The molar mass of methane is 16.04 g/mol
The Density of methane is 0.717 kg/m³
Therefore,
\(Vm = \frac{Molar mass}{Density}\)
\(Vm\) = 16.04 / 0.717
Hence, Molar volume is 22.37 L/mol
How to calculate average molar volume ?Average molar volume is given by ,
1 mole of gas = 22.4 L volume
For propane:
average volume is 22.4 × 1 mole
average volume is = 22.4 × 44.09
Therefore , Average volume is 987.6 L/mol
For butane:
average volume is 22.4 × 1 mole
average volume is = 22.4 × 58.12
Therefore , Average volume is 1301.8 L/mol
For methane:
average volume is 22.4 × 1 mole
average volume is = 22.4 × 16.04
Therefore , Average volume is 359.3 L/mol
What is molar volume ?At standard temperature and pressure (STP), molar volume (Vm) is the volume occupied by one mole of a chemical element or compound. It can be calculated by dividing the molar mass (M) by the mass density (ρ). A molar gas volume is one mole of any gas at a given temperature and pressure has a constant volume.Can learn more about molar volume from https://brainly.com/question/28141239
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What is the empirical formula of a compound composed of 72. 36% fe and 27. 64% o by mass?.
The empirical formula of the compound is Fe₂O₃, representing the simplest mole ratio of Fe and O.
The empirical formula represents the relative proportion of elements in a compound, showing the simplest, whole-number ratio of atoms.
It is often referred to as the molecular formula. While molecular formulas provide the actual number of atoms in a molecule, empirical formulas convey the ratios of the elements.
In the given compound composed of 72.36% Fe and 27.64% O by mass, the empirical formula is Fe₂O₃.
To determine the empirical formula:
Assume 100 g of the compound.
Calculate the number of moles for each element.
Find the ratio of moles for each element.
Divide each mole value by the smallest mole value to obtain the simplest mole ratio.
Write the empirical formula.
Following these steps:
Assuming 100 g of the compound, there are 72.36 g of Fe and 27.64 g of O.
Calculate the moles of Fe: Moles of Fe = (72.36 g Fe) / (55.85 g/mol) = 1.294 mol Fe
Calculate the moles of O: Moles of O = (27.64 g O) / (16 g/mol) = 1.7275 mol O
The ratio of moles is Fe:O = 1.294 mol Fe : 1.7275 mol O
Dividing each value by the smallest value of 1.294, we get Fe:O = 1 : 1.33
The empirical formula is Fe₂O₃.
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___________ is defined as the amount of heat required to raise the temperature of the calorimeter by one degree. Group of answer choices qrxn Cp Ccal qsoln
Ccal is defined as the amount of heat required to raise the temperature of the calorimeter by one degree.
Heat is a type of energy that is transferred from one body to another as a result of a temperature difference. Heat always flows from the body with a higher temperature to the body with a lower temperature.
Temperature is a measure of the hotness or coldness of a body or an object. The SI unit of temperature is Kelvin (K).
A calorimeter is an instrument used to measure the quantity of heat absorbed or released by a body or a system during a chemical or physical change. The heat capacity of a calorimeter is known as Ccal. It is defined as the amount of heat required to raise the temperature of the calorimeter by one degree.
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PLZ HELP ME 20 POINTS AND BRAINLEIST What do you suppose would happen if you placed an ice cube in a beater containing pure ethanol (density = 0.789 g(mL) wounldn it sink or float?
Explanation: The Ice Would Sink Toward the Bottom
Density of Ice at 0 Celsius is 0.92 grams per milliliter. Therefore the Ice has a greater density than ethanol, and the ice cube should sink toward the bottom
(1.945 X 10^18) + (4.70 X 10^20)
Answer: 471944999999999967232
Explanation:
(1.945)(1000000000000000000)+4.7(1020)
=1945000000000000000+4.7(1020)
=1945000000000000000+(4.7)(100000000000000000000)
=1945000000000000000+470000000000000000000
=471944999999999967232
describe the basic assumptions of the kinetic molecular theory of gases that confirm the ideal behavior of gases.
The kinetic-molecular principle of gases assumes that perfect gasoline molecules are constantly moving.
have negligible quantity;have negligible intermolecular forces undergo flawlessly elastic collisions have a median kinetic strength proportional to the suitable fuel's absolute temperature.The gasoline debris has a negligible extent. The gas debris is similarly sized and no longer has intermolecular forces (enchantment or repulsion) with other fuel particles. The gasoline debris flows randomly in settlement with Newton's legal guidelines of motion. The gasoline debris has perfect elastic collisions without energy loss.
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Non-ferrous metal is NOT hardenable by heat treatment; it must
gain strength through a process such as tempering. Is this
statement TRUE or FALSE?
Group of answer choices
True
False
The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.
Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.
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Which of the following is a chemical property?
A:
mass
B:
oxidizes in air
C:
boiling point
D:
solubility
which lewis dot structure represents an eleemtn that should be placed in column viia of the periodic table
The Lewis dot structure that represents an element that should be placed in column VIIA of the periodic table is a structure that has 7 valence electrons.
The VIIA column of the periodic table, also known as the halogens, contains elements that have 7 valence electrons in their outermost energy level. Therefore, the Lewis dot structure for any of these elements should have 7 dots or electrons placed around the element's symbol.
The Lewis dot structure is a visual representation of an element's valence electrons, which are the electrons that participate in chemical bonding. In this type of structure, the element's symbol is placed in the center, and dots or lines are used to represent its valence electrons. The dots are placed around the symbol, with each dot representing a single valence electron. The number of valence electrons an element has determines its position in the periodic table and its reactivity.
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Polarities of analyte functional group increase in the order of hydrocarbon ethers < esters
The correct order of the increasing polarity of the analyte functional group isEthers < Esters.
The given statement is "Polarities of analyte functional group increase in the order of hydrocarbon ethers < esters." The order of polarities of functional groups is the order of their increasing polarity (i.e., less polar to more polar) based on their electron-donating or withdrawing ability from the rest of the molecule.Polarity of analyte: The analyte's polarity is directly proportional to the dipole moment of the functional group, which is associated with a difference in electronegativity between the atoms that make up the functional group.The electronegativity of an element is its ability to attract electrons towards itself. The greater the difference in electronegativity between two atoms, the more polar their bond, and hence the greater the polarity of the molecule.
To find the correct order of the increasing polarity of the analyte functional group, let's first compare the two groups: hydrocarbon ethers and esters. Here, esters have a carbonyl group while ethers have an oxygen atom with two alkyl or aryl groups. The carbonyl group has more electronegative oxygen, which pulls electrons away from the carbon atom, resulting in a polar molecule. On the other hand, ethers have a less polar oxygen atom with two alkyl or aryl groups, making them less polar than esters. Therefore, the correct order of the increasing polarity of the analyte functional group isEthers < Esters.
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Match 4 terms with definitions.
Answer:
A- Solid
B-Plasma
C-Liquid
D-Gas
True or False: The periodic table has changed very little since it was originally developed by Mendeleev and Meyer.
The periodic table has changed very little since it was originally developed by Mendeleev and Meyer is referred to as a false statement.
What is a Periodic table?
This is defined as the arrangement of elements based on their atomic number in a tabular form. It consists of 18 vertical columns which re referred to as groups and seven horizontal rows called period.
Henry Moseley in 1913 organized Mendeleev's periodic table based on physical properties.This took into consideration their atomic number rather than atomic mass and other missing elements.
This is the periodic table which is used currently and therefore hasn't changed much which is why false was chosen.
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2. A force of 600 Newtons acts on a ball for 1.5 seconds after being hit by a volleyball player.
a. What is the change in momentum of the ball?
b. If the ball has a mass of 275 grams, what is its velocity?
a) Data:
F = 600 N
t = 1.5 s
The equation for Impulse:
Impulse = I = F x t,
then the change in momentum: pf - pi
Impulse and the change in momentum are related like this:
pf - pi = I = F x t = 600 N x 1.5 s = 900 N.s
Therefore the change in momentum: pf-pi = 900 N.s
b) Velocity (t) = initial velocity + a x t
We can assume initial velocity = 0 m/s
From F = m x a = mass x acceleration, we clear "a",
m = 275 g = 0.275 kg (1 kg = 1000 g)
Then, F/m = a => 600 N/0.275 kg = 2182 m/s^2
Velocity (t) = 0 + 2182 m/s^2 x 1.5 s = 3273 m/s
Velocity = 3273 m/s
Can someone please explain the steps to the correct answers?
Explanation:
1. b is correct because 10^-2 is 1/100. multiplying that by 1.862 is 0.01862
2. 6 feet 10 inches = 82 inches. multiplying 82 by 2.54 we get 208.28. there are only two sig figs so it's 210 cm, not 0.21 cm.
3. 25.2 x 39370 = 992000, which is 9.92 x 10^5.