The ranking of the indicated species in water based on their relative nucleophilicity is as follows:
\(CH_3S^- > CH_3O^- > CH_3OH > CH_3COO^- > CH_3COOH\)
Nucleophilicity is the ability of a species to donate an electron pair and participate in a chemical reaction. In water, nucleophilicity is influenced by the ability of the species to interact with the partially positive hydrogen atoms of water (Hδ\(^+\)). The higher the electron density on the nucleophilic species, the stronger its interaction with the partially positive hydrogen atoms of water and hence, the higher its nucleophilicity.
In the given list, \(CH_3S^-\) has the highest nucleophilicity because the negative charge is present on a sulfur atom, which is larger than oxygen and can accommodate more electrons, resulting in higher electron density on the nucleophilic site.
[tex]CH_3O^-\) is the next most nucleophilic species because oxygen is also electronegative and has a higher electron density than the carbon atoms in the other species.
\(CH_3OH\) is a weaker nucleophile than \(CH_3O^-\) because the methoxide ion has a negative charge, whereas \(CH_3OH\) is neutral and has less electron density. \(CH_3COO^-\) and \(CH_3COOH\) have even lower nucleophilicity because the carbonyl group in these species reduces the electron density on the nucleophilic site.
In summary, the relative nucleophilicity of the indicated species in water is \(CH_3S^- > CH_3O^- > CH_3OH > CH_3COO^- > CH_3COOH.\)
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How many atoms are there in 7.95 moles of carbon dioxide?
Answer:3
Explanation:
Including soluble fiber into your diet can __________.
A. digest amino acids
B. digest cellulose
C. raise cholesterol levels
D. lower cholesterol levels
Answer:
The answer is D.
Explanation:
Including soluble fiber into your diet can lower cholesterol levels.
Erik has a handful of whitish gray stones with a nonmetallic luster that leave a colorless streak. They can be scratched by a steel file but not by a knife. What does he have
Erik has a handful of quartz stones. Quartz is an extremely common mineral made up of silicon dioxide, which is often found in a variety of colors.
What is silicon?Chemical element silicon has the chemical symbol Si the atomic number 14. It is a tetravalent metalloid as semiconductor that has a blue-gray metallic lustre and is a hard, brittle crystalline solid. By mass, silicon makes up the eighth most common element in the cosmos, although it only very infrequently appears in the crust of the Earth as a pure element. It is most commonly found as different types of silicon dioxide (silica) and silicates in dusts, sands, planetoids, & planets.
Quartz is a hard mineral, with a hardness of 7 on the Mohs scale, meaning it can be scratched by a steel file but not a knife. Quartz also has a nonmetallic luster and leaves a colorless streak when scratched.
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City A in the Southern Hemisphere and City B in the Northern Hemisphere are located at the same latitude. Which statement is likely true about these
cities?
City B has the larger annual temperature range.
Both cities should have nearly identical winter temperatures.
City A has the larger annual temperature range.
Both cities likely have the same annual temperature range.
Answer:
City B has the larger annual temperature range
Explanation:
This is correct option because generally the northern side of the equator is high in temperature than the southern hemisphere part.
Since the southern side of the equator or Southern Hemisphere, where city A resides will generally have higher altitude or rise, so this creates higher average temperature.
Seaweed attached to rocks in the ocean performs photosynthesis underwater. Which statement best explains how some seaweed can survive in very deep and dark places in the ocean? It can use a small amount of sunlight for photosynthesis. It can use a small amount of sunlight for photosynthesis. It moves to the upper levels of the ocean to get sunlight for photosynthesis. It moves to the upper levels of the ocean to get sunlight for photosynthesis. It does not need any sunlight to perform photosynthesis. It does not need any sunlight to perform photosynthesis. It produces its own sunlight to perform photosynthesis. It produces its own sunlight to perform photosynthesis.
Answer:
It can use a small amount of sunlight for photosynthesis
Explanation:
Seaweeds are a group of marine plants/algae that grow attached to rocks underwater. However, despite their depth underwater, they still perform photosynthesis, which is a process that requires energy from sunlight.
Seaweeds are able to perform photosynthesis underwater because they are efficient users of sunlight energy. Hence, they require only a small amount of sunlight that penetrates the ocean to perform photosynthesis.
do chemical equations with no reaction still have to be balanced
Answer:
The same number of atoms of each element must appear on both sides of a chemical equation. However, simply writing down the chemical formulas of reactants and products does not always result in equal numbers of atoms. You have to balance the equation to make the number of atoms equal on each side of an equation.
Explanation:
The first order reaction,so2cl2 to so2+cl2,has a half life of 8.75 hours at 593k.How long will it take for the concentration of so2cl2 to fall to 12.5% of its initial value? 6.24hours 26.2hours 16.2hours 22.6hours
Answer: The time after which the concentration of \(SO_2Cl_2\) fall to 12.5% of its initial value is 26.2 hours
Explanation:
Expression for rate law for first order kinetics is given by:
\(t=\frac{2.303}{k}\log\frac{a}{a-x}\)
where,
k = rate constant
t = age of sample
a = let initial amount of the reactant = 100
a - x = amount left after decay process = 12.5
a) for completion of half life:
Half life is the amount of time taken by a radioactive material to decay to half of its original value.
\(t_{\frac{1}{2}}=\frac{0.693}{k}\)
\(k=\frac{0.693}{8.75hour}=0.0792hour^{-1}\)
b) for concentration to fall to 12.5 % of initial value
\(t=\frac{2.303}{0.0792}\log\frac{100}{12.5}\)
\(t=26.2hours\)
The time after which the concentration of \(SO_2Cl_2\) fall to 12.5% of its initial value is 26.2 hours
Which of the following Periodic Table trends (characteristics) is incorrect?
a) electron affinity decreases from top to bottom on the periodic table
b) electronegativity decreases left to right across the periodic table
c) atomic radii decreases left to right across the periodic table
d) ionization energy decreases from top to bottom on the periodic table
(b) electronegativity decreases left to right across the periodic table
Electronegativity increases from left to right in a period across the periodic table.
Electronegativity is a relative property that defines the tendency to attract shared pair of electrons. It is a unitless parameter that is calculated by different formulae.
Pauling scale is widely used to calculate the electronegativity values of a covalent bond. e.g. F = 4.0, Cl = 3.0, etc.
⇒Electron affinity decreases from top to bottom in the periodic table.
⇒Atomic radii decrease from left to right in the periodic table.
⇒Ionization energy decreases from top to bottom in the periodic table.
given the equation, N2H4 + N2O4 -> N2 + H2O, how many moles of N2)=O4 are needed to react with 3.5 moles of N2H4
Answer:
Explanation:
I think you mean
2N2H4 + N2O4 ==> 3 N2 + 4H2O
The equation says that for Every mol of N2O4, you need 2 moles of N2H4.
1/2 = x/3,5 Multiply both sides by 3.5
3.5*1 / 2 = x
1.75 = x
Therefore you need 1.75 moles N2O4 are needed for 3.5 moles of N2H4
Describe each layer of Earth’s current atmosphere below:
Answer:
exosphere thermosphere mesosphere stratosphere troposphere
Why can’t a smartphone disappear completely in liquid acid?
Answer:
its metal because its metal
Organic molecules form _________ bonds and inorganic compounds form _________ bonds.
Organic molecules form covalent bonds and inorganic compounds form ionic bonds.
What are ionic and covalent bonds?
The main interaction in ionic compounds is ionic bonding, a type of chemical bonding that involves the electrostatic attraction between two atoms or ions with dramatically different electronegativities.
A chemical link known as a covalent bond includes the sharing of electrons between atoms to generate electron pairs. Covalent bonding is the stable equilibrium of the forces of attraction and repulsion between atoms when they share electrons.
Inorganic compounds have ionic bonds. There is always an ion-dipole attraction when inorganic compounds are combined with water, meaning the ions are solvated (hydrated)
Covalent bonding is frequently seen in molecules containing carbon, usually known as organic compounds. The two atoms' common pair of electrons has now extended around their nucleus, resulting in the formation of a molecule.
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What happens to that atom of magnesium-24 if it GAINS a PROTON
Answer:
Adding or removing protons from the nucleus changes the charge of the nucleus and changes that atom's atomic number. So, adding or removing protons from the nucleus changes what element that atom is! For example, adding a proton to the nucleus of an atom of hydrogen creates an atom of helium
Explanation:
014
Question 5
(02.02 MC)
Which of the following is the best example of chemical weathering? (4 points)
a. Limestone rocks dissolving in water
b. Plant roots growing through concrete and splitting it
c. Waves carrying sand away from a beach
d. A large rock splitting into pieces because of ice
Answer:
my guess would be limestone disolving in water
Explanation:
Answer:
It is Limestone rocks dissolving in water
Explanation:
I did same exact quiz and I got it correct
Contains a nonmetal and metal
A) base
B) acid
C) covalent bond
D) salt
Which is an example of the consequences of unhealthy eating?
Answer: An unhealthy diet can increase the risk of some cancers. Overweight and obesity are associated with at least 13 types of cancer, including endometrial (uterine) cancer, breast cancer in postmenopausal women, and colorectal cancer. These cancers make up 40% of all cancers diagnosed.
The temperature at 9 p.m. was -4 degrees Fahrenheit, which is one-third of the temperature at midnight. What was the temperature at midnight? Write an equation that could represent this situation.
Temperature at midnight would be -12 degrees Fahrenheit and is determined using the equation that represents this situation i.e., T/3 = -4.
In mathematics, an equation is a representation of a formula or statement that illustrated an equality relationship of two expressions. The expressions are connected with an equals sign. Solving an equation containing variables involves calculating values of the variables that make the equality true. The variables for which the equation has to be solved are also called unknowns, and the values of the unknowns that satisfy the equality are called solutions of the equation.
Based on the information provided, as the temperature at 9am is -4 and it is the 1/3 of the temperature at midnight T, the equation would be:
1/3* Midnight temperature = 9am temperature
1/3*T = -4 or T/3 = -4
Solving the equation,
T = 3*-4 = -12.
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What is the formula of phosphorus atoms and calcium atoms?
Answer:
Calcium phosphate chemical formula is given as Ca3(PO4)2.
Explanation:
Answer:
Calcium Phosphate is written as Ca3(PO4)2.
Explanation:
How many moles are in 6.243 x 10^24 molecules of H2O
Taking into account the definition of Avogadro's Number, 10.365 moles of H₂O are 6.243×10²⁴ molecules of H₂O.
Definition of Avogadro's NumberAvogadro's Numberis called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance.
Its value is 6.023×10²³ particles per mole and it applies to any substance.
Number of moles of H₂OYou can apply the following rule of three: if 6.023×10²³ molecules are contained in 1 mole of H₂O, then 6.243×10²⁴ molecules are contained in how many moles of H₂O?
amount of moles of H₂O= (6.243×10²⁴ molecules× 1 mole)÷ 6.023×10²³ molecules
amount of moles of H₂O= 10.365 moles
Finally, 10.365 moles of H₂O are 6.243×10²⁴ molecules of H₂O.
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What are the similarities in the chemical formula?
Chemical similarity (or molecular similarity) is the likeness of chemical elements, molecules, or chemical compounds in terms of either structural or functional features, i.e. the impact that the chemical substance has on reaction partners in inorganic or biological environments.
What parallels exist between the empirical and molecular formulas?The empirical formula of a molecular simplification is defined as the lowest ratio of atoms. The empirical formula and the molecular formula are therefore connected. The information about the elements contained in a molecule and their ratios is provided by both the molecular formula and the empirical formula.
While a compound's structural formula provides the same information as its molecular formula, it additionally reveals the atoms' connections inside the molecule.
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Which of the following is NOT a type of mucle tissue?
Cardiac
Smooth
Striped
Skeletal
Answer:
Striped should be the answer
1pt Twins raised in different families still exhibit similar mannerisms, indicating that at least some behavior is
O A. genetis
OB. environmental
O C. instinctual
OD. learned
Which halogen has 5 energy levels?
O iodine
bromine
Xenon
O nitrogen
Answer:
nitrogeno
Explanation:
creo xdddd
Answer:
bromine
Explanation:
(Ar)3d10,4s2,4p5
Which statement best defines kinetic energy? A. kinetic energy is highest at the highest point of structure or model.
B. kinetic energy is stored in a battery.
C. kinetic energy is energy that is stored up. D. kinetic energy is the energy of motion. help me pls!!
Answer:
The answer is D. Kinetic energy is the energy of motion.
Pls mark brainliest. Hope this helped. :D
If an atom has a mass number of 52 and has 28 neutrons, what is the atomic number?
Answer:
24
Explanation:
52-28=24
to which grop and period do the following elements belong carbon,neon,aluminium,potassium ,calcium,sulphur
Answer:
C:4A second period Ne:8A second period Al:3A third period K:1A fourth period Ca:2A fourth S:6A third period
Explanation:
There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, with the help of periodic table we can locate the element's position.
What is periodic table?Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.
Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.
carbon belongs to period 2 and group 14
neon belongs to period 2 and group 18
aluminium belongs to period 3 and group 13
potassium belongs to period 4 and group 1
calcium belongs to period 4 and group 2
sulfur belongs to period 3 and group 16
Therefore, with the help of periodic table we can locate the element's position.
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Mr. Mcphillip has a ribbon of magnesium (mg), a silvery metal. As a demonstration for his class, he sets the metal on fire. It burns brightly, leaving behind a whitish powder. The magnesium is and the powder produced by burning it is.
The magnesium and the powder produced by burning it is an Element, compound.
A burning magnesium ribbon produces light of sufficient intensity to cause temporary vision loss. Do not look directly into the light source. Burning magnesium in the air produces intense heat that can cause burns and ignite combustible materials. When magnesium reacts with oxygen it emits a bright light that can temporarily blind you.
Magnesium burns very brightly because the reaction releases a lot of heat. As a result of this exothermic reaction, magnesium donates two electrons to oxygen-producing powdered magnesium oxide. Combustion of magnesium ribbon in the air is a chemical change for the following reasons: It is an irreversible change because once the ribbon burns it cannot be reignited. A new product with new properties is created.
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in the space provided, write the net ionic equation for when solutions of cobalt(ii) chloride and carbonic acid react. [1] tip: don't forget the state of matter.
The net ionic equation for the reaction of cobalt(ii) chloride and carbonic acid is Co2+ (aq) + CO32- (aq) -> CoCO3 (s).
The net ionic equation for when solutions of cobalt(ii) chloride and carbonic acid react is:
CoCl2 (aq) + H2CO3 (aq) -> CoCO3 (s) + 2 HCl (aq)
In this equation, CoCl2 represents the dissolved cobalt(ii) chloride, and H2CO3 represents the dissolved carbonic acid. The arrow indicates the direction of the reaction, and the state of matter for each compound is shown in parentheses.
When the two solutions are mixed, they undergo a double displacement reaction, where the cobalt(ii) cation (Co2+) and the carbonate ion (CO32-) switch partners to form cobalt carbonate (CoCO3), which is a solid precipitate that falls out of solution, and hydrochloric acid (HCl), which remains in solution.
The net ionic equation shows only the species that are directly involved in the reaction, in their ionized form. In this case, the chloride ion (Cl-) and the hydrogen ion (H+) are spectator ions that do not participate in the reaction and therefore are not shown in the net ionic equation. The net ionic equation is a way to simplify the overall reaction and highlight the key chemical species involved.
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What benefit does the release of carbon dioxide have on kelp and other producers?
The benefit of the release of carbon dioxide have on kelp and other producers is its ability to absorb and lock away huge quantities of carbon dioxide.
What is kelp and its benefits?Kelp is a type of seaweed which being developed for its nutritional value. Kelp is high in antioxidants, including carotenoids and flavonoids, that help fight against disease-causing free radicals. Antioxidant minerals, such as manganese and zinc, help combat oxidative stress and may help protect cardiovascular health and prevent cancer.
Kelp has an ability to absorb and lock away huge quantities of carbon dioxide. Seaweed absorbs CO2 more effectively than trees. It also improves water quality by extracting harmful nutrients such as nitrogen from the sea.
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which standard iv solution has an osmolarity of approximately 150 mosm?
A standard IV solution with an osmolarity of approximately 150 mosm is a 0.9% (w/v) sodium chloride (NaCl) solution.
Osmolarity is a measure of the concentration of solute particles in a solution per unit volume. In the context of IV solutions, osmolarity is an important parameter to ensure compatibility with the patient's body fluids.
A 0.9% (w/v) NaCl solution, also known as normal saline or physiological saline, is commonly used as a standard IV solution. This solution is prepared by dissolving 0.9 grams of NaCl in 100 mL of water.
To determine the osmolarity of the solution, we need to calculate the number of moles of NaCl and then convert it to osmoles.
The molar mass of NaCl is 58.44 g/mol. By calculating the moles of NaCl in the 0.9% solution, we have:
Moles of NaCl = (0.9 g / 58.44 g/mol) = 0.0154 mol
Since each NaCl molecule dissociates into two ions (Na⁺ and Cl⁻) in solution, the total number of solute particles is doubled:
Total osmoles = 2 × Moles of NaCl = 2 × 0.0154 mol = 0.0308 osmoles
Since the osmolarity is expressed per liter of solution, we need to convert the osmoles to mosmoles (osmoles per liter):
Osmolarity = Total osmoles / Volume of solution
Assuming a volume of 1 liter, the osmolarity is 0.0308 mosmoles/L = 30.8 mosm.
Therefore, to achieve an osmolarity of approximately 150 mosm, the 0.9% NaCl solution is commonly used as a standard IV solution.
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