Who wants to do my acellus work? Or know how to get the answers ?

one in four  are the odds of acquiring an sexually transmitted infections

during a lifetime.

Sexually transmitted infections (STI) are described as the  infections or conditions that you can get from any kind of sexual activity involving your mouth, an_us, vagi_na or pe_nis.

The chances of getting an Sexually transmitted infections  from one unprotected encounter with a partner who is infected with syphilis, gonorrhea, or chlamydia are about 30 percent.

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Answer:

The bowling ball has more kinetic energy than the tennis ball

Explanation:

Using the formula 1/2 mass × acceleration we found that the tennis ball had a kinetic energy of 0.75 while the bowling ball had a kinetic energy of 10.5 hence the bowling ball has the ability to do more work

The bowling ball has more kinetic energy than the tennis ball.

Given the following data:

Mathematically, kinetic energy is given by this formula:

\(K.E = \frac{1}{2} MV^2\)

Where:

For tennis ball:

\(K.E = \frac{1}{2} \times 0.5 \times 3^2\\\\K.E = \frac{1}{2} \times 0.5 \times 9\)

K.E = 2.25 Joules.

For bowling ball:

\(K.E = \frac{1}{2} \times 7 \times 2^2\\\\K.E =3.5 \times 4\)

K.E = 14 Joules.

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answer

1.1 Carbon is the sixth element in the periodic table.

(IV A)

1.2 electric configuration: O⁸ (He²) 2s² 2p⁴ .

atomic number: 8

1.3 protons= 8 , electron = 7

1.4 oxygen has 6 valence electrons .

carbon has 4 valence electrons.

1.5 the answer is in the photo.

Answer:

Causative/sensitizing factors of pancreatic injury include refluxed bile acids, alcohol, and pH. They largely mediate downstream events such as elevated intracellular Ca2+ via influx through TRPC3 channels and release from IP3 and ryanodine-sensitive Ca2+ stores.

Explanation:

Here, we have to draw the main organic products of a given bimolecular substitution reaction and the curved arrow mechanism of the reaction.

(Answer is attached in the picture)

Substitution reactions involve the replacement of one functional group in a molecule by another functional group. Nucleophilic substitution reactions involve a nucleophilic reagent with a substrate that has a positively or partially positively charged portion of the molecule (electrophile).

An electrophile is an atom or molecule that lacks electrons. In organic reactions, electrophiles act as electron acceptors (Lewis's acids). These reagents can be cations or neutral molecules that have relatively positively charged atoms.

Meanwhile, a nucleophile is an atom or molecule that is rich in electrons. The nucleophile has an electron pair that can be donated (a Lewis base). Some nucleophiles are neutral molecules that have a PEB and some are negatively charged. In a chemical reaction, electrons from the nucleophile strike the electrophile center to form new bonds as a result of the reaction.

On the question:

Use of curved arrows to indicate: A broken or formed bond.

Electron layer protective layer arrow

In the reaction of this problem, I replaced Br (Substitution) and Br bonded with Na⁺.

The nucleophile "replaces" the leaving group.

Called a substitution reaction: I replace Br (change places).

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Solutions characterized by the formation of hydroxide ions (OH⁻) are basic.

Solutions that have a pH greater than 7 are considered basic or alkaline, and they are characterized by the presence of hydroxide ions (OH⁻). Hydroxide ions are formed when water (H₂O) undergoes autoionization, in which a small fraction of water molecules dissociate into hydrogen ions (H⁺) and hydroxide ions (OH⁻).

In a basic solution, the concentration of hydroxide ions is greater than the concentration of hydrogen ions. Basic solutions have a slippery feel and a bitter taste, and they can be corrosive to some metals. Understanding the properties of basic solutions is important in fields like chemistry, biology, and environmental science.

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If it forms ions with ammonium in the ratio of (NH4)3X, X could be in Group IV A. Group IVA (14) metals form cations with +4 charge, although tin (Sn) and lead (Pb) can form cations having +2 charge.

A covalent link (a shared pair of electrons) in which both electrons originate from the same atom is known as a coordinate bond (also known as a dative covalent bond). Two atoms sharing a pair of electrons make a covalent connection. Because the electron pair is drawn to both nuclei, the atoms are kept together.

An arrow pointing from the donor to the acceptor, with a positive charge on the donor and a negative charge on the acceptor, is used to symbolize a coordinate bond.

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The balanced reaction of this chemical reaction is as follows :

• As we can see, this is a double-displament reaction

Answers: Analyze the ingredients in ice cream and how to separate gasoline from other substances. These answers half to do with chemicals and molecular structure. The other answer choices are not for a chemist. Hope this helps. :)

Answer:

It only makes objects float if they are less dense than their surroundings, like a boat on water, or a helium balloon in air. Buoyancy works due to displacement. ... In the case of a balloon, the helium inside the balloon weighs less than the same volume of air the balloon displaces

Explanation:

Answer:

In the case of a balloon, the helium inside the balloon weighs less than the same volume of air the balloon displaces. ... So a helium balloon has two opposing forces acting on it: gravity pulling it down, and buoyancy pushing it up. Buoyancy wins, so you can't really weigh a balloon, even though it does have weight.

Knowing the volume of air displaced by the helium balloon, we can calculate the maximum mass the balloon can lift. ... Helium, which has a mass of 4.00 g/mol, has a density of 0.164 g/l. Thus, a one-liter balloon of helium can lift a mass of (1.18-0.164) = 1.02 g.

Answer:

-ide

Explanation:

Ionic compounds are made up of two parts: a cation and an anion. The cation is positively charged (less electrons) and the anion is negatively charged (more electrons). When naming these compounds, if the anions are nonmetals, they have their endings dropped in order to add the new ending: -ide.

Examples,

CaCl₂ ----> calcium chloride

BaF₂ -----> barium fluoride

MgO -----> magnesium oxide

The molar mass of a substance, you need to add up the atomic masses of all one mole of the substance. In the case of CaCl2, you have one calcium atom with a molar mass of 40.08 g/mol and two chlorine atoms with a molar mass of 35.45 g/mol each.

which  gives a total molar mass of 110.98 g/mol.  CaCl2 has a molar mass of 110.98 g/mol, which is closest to the given molar mass of 40.00 g/mol the molar mass of K2SO4 is 174.26 g/mol, the molar mass of is 40.00 g/mol  the molar mass of CH is 13.01 g/mol, none of which match the given molar mass.

The substance with a molar mass of 40.00 g/mol is NaOH. To calculate the molar mass of a compound, you need to sum the atomic masses of all the elements present in it. For NaOH Adding these atomic masses together, we get: 22.99 + 16.00 + 1.01 = 40.00 g/mol.

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The evidence that indicated that the map made near Lake Tapps in Washington was a massive lahar from Mt. Rainier and not an old glacier: Whole logs mixed in with the rocks, Clay-sized particles and An abundance of snow and ice

The following evidence indicated that the map made near Lake Tapps in Washington was a massive lahar from Mt. Rainier and not an old glacier:

Whole logs mixed in with the rocks: The presence of whole logs mixed in with the rocks suggests a rapid and powerful flow, characteristic of a lahar, rather than the slow movement associated with glaciers.

Clay-sized particles: The presence of clay-sized particles is often associated with lahars, as they can be easily transported by the flowing volcanic material.

An abundance of snow and ice: The presence of snow and ice is indicative of a recent event, as glaciers tend to accumulate and retain snow and ice over time. In the case of a lahar, the presence of snow and ice suggests a more recent deposition.

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Answer: group 1A (or IA)

Explanation:

Answer:

C. The dissolving reaction of A was exothermic and the dissolving of reaction B was endothermic

Explanation:

Here is stuff to help you:

Hope this helps! Please let me know if you need more help, or if you think my answer is incorrect. Brainliest would be MUCH appreciated. Have a great day!

−xXheyoXx

a) The sphere emits thermal radiation at a rate of 139.75 Watts.

b) The sphere absorbs thermal radiation at a rate of 37.66 Watts.

c) The sphere's net rate of energy exchange is 102.09 Watts.

To calculate the rates of thermal radiation emission and absorption, we can use the Stefan-Boltzmann law, which states that the rate of thermal radiation emitted or absorbed by an object is proportional to its surface area, temperature, and the Stefan-Boltzmann constant.

a) The rate of thermal radiation emitted by the sphere can be calculated using the formula:

Emitting Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(temperature^4 - environment\ temperature^4\))

Plugging in the given values:

Emitting Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((32.2 + 273.15)^4 - (82.9 + 273.15)^4)\)

Emitting Rate ≈ 139.75 Watts

b) The rate of thermal radiation absorbed by the sphere can be calculated in a similar way but using the environment temperature as the object's temperature:

Absorbing Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(environment\ temperature^4 - temperature^4\))

Plugging in the given values:

Absorbing Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((82.9 + 273.15)^4 - (32.2 + 273.15)^4)\)

Absorbing Rate ≈ 37.66 Watts

c) The net rate of energy exchange is the difference between the emitting rate and the absorbing rate:

Net Rate = Emitting Rate - Absorbing Rate

Net Rate = 139.75 Watts - 37.66 Watts

Net Rate ≈ 102.09 Watts

Therefore, the sphere emits thermal radiation at a rate of 139.75 Watts, absorbs thermal radiation at a rate of 37.66 Watts, and has a net rate of energy exchange of 102.09 Watts.

Note: The units for all the rates are Watts.

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Therefore, the monomers used to make the polyester would be propanedioic acid and ethylene glycol.

Polyesters are polymers created by a condensation process between monomers in which ester groups are formed to connect the molecules together.

PET is converted into a high-strength textile fibre that is sold under the trademarked names Terylene (Imperial Chemical Industries Ltd.) and Dacron (DuPont). Because of their rigidity and great resistance to deformation, PET fibres provide exceptional resistance to wrinkling in textiles. They are frequently used in durable-press mixes with other fibres like rayon, wool, and cotton, enhancing their natural qualities while enhancing the fabric's capacity to recover from wrinkles.

To make a polyester, the monomers typically used are a dicarboxylic acid and a diol. Based on the options provided, the suitable monomers for making a polyester would be:

Propanedioic acid (also known as malonic acid) - a dicarboxylic acid

Ethylene glycol - a diol

Therefore, the monomers used to make the polyester would be propanedioic acid and ethylene glycol.

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We need to consider the ionization energy to remove the remaining electron. The ionization energy is the amount of energy needed to remove an electron from an atom or ion.

A single ionized helium atom, already has one electron missing, leaving behind a \(He^{+}\) ion with a charge of +1.  In the case of removing the remaining electron from \(He^+\), we need to find the ionization energy of helium, which is the energy required to remove the first electron from a neutral helium atom (He). The ionization energy of helium is known to be approximately 24.6 electron volts (eV). This means that it takes 24.6 eV of energy to remove the first electron from a neutral helium atom. Since He+ already has one electron missing, we can say that the energy required to remove the remaining electron from He+ is also 24.6 eV. This is because the ionization energy remains the same regardless of the charge of the ion. Therefore, the energy required to remove the remaining electron from a singly ionized helium atom is approximately 24.6 electron volts (eV).

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The answer to question 58 is c. Aluminum. When aluminum dissolves in acid waters, it can be extremely toxic to fish, causing death or other negative effects on their health. Acid waters are bodies of water that have a low pH due to acid rain or other sources of acidity.

These acid waters can dissolve metals and other pollutants, making them even more harmful to aquatic life. It is important to monitor and regulate the pH and pollution levels in bodies of water to ensure the health and survival of fish and other aquatic organisms. The most fatal metal to fish when it becomes dissolved in acid waters is c. Aluminum. In acidic environments, aluminum becomes more soluble and toxic to aquatic life, including fish. Elevated levels of dissolved aluminum can lead to gill damage, reduced growth, and even death in fish populations. Although manganese, lead, and zinc can also be harmful in high concentrations, aluminum poses a greater threat in acid waters due to its increased solubility and toxicity.

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When calculating the number of neutrons you subtract the mass number from the atomic number?

Since the vast majority of an atom's mass is found its protons and neutrons, subtracting the number of protons (i.e. the atomic number) from the atomic mass will give you the calculated number of neutrons in the atom. In our example, this is: 14 (atomic mass) – 6 (number of protons) = 8 (number of neutrons).

Mass of Cl₂ : 164.01 g

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

mol Cl₂ :

\(\tt n=\dfrac{N}{No}\\\\n=\dfrac{1.39.10^{24}}{6.02.10^{23}}\\\\n=2.31\)

mass Cl₂(MW=71 g/mol) :

\(\tt mass=mol\times MW\\\\mass=2.31\times 71=164.01\)

Answer:

hui

Explanation:

The correct answer is C. Hydrocarbons are composed primarily of hydrogen and carbon.

Hydrocarbons are composed primarily of hydrogen and carbon. They are organic compounds made up of only carbon and hydrogen atoms. Hydrogen is the most abundant element in the universe, while carbon is the fourth most abundant element in the universe and is essential for life.

Hydrocarbons are found naturally in fossil fuels such as coal, oil, and natural gas, as well as in living organisms. They play a crucial role in modern society as a source of energy and as raw materials for the production of a wide range of products, including plastics, pharmaceuticals, and fertilizers.

The properties of hydrocarbons depend on their molecular structure and can vary widely, from gases such as methane and propane to liquids such as gasoline and diesel fuel to solids such as paraffin wax.

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Answer: Carbon

K12 quiz test

Nanomaterials, whether natural, engineered, organic, or inorganic, offer various applications across industries. However, their environmental health and safety impacts need to be carefully evaluated and managed to mitigate any potential risks.

Understanding their properties, fate, and behavior in different environments is crucial for responsible development, use, and disposal of nanomaterials.

Natural Nanomaterials:

Examples: Carbon nanotubes (CNTs) derived from natural sources like bamboo or cotton, silver nanoparticles in natural colloids, clay minerals (e.g., montmorillonite), iron oxide nanoparticles found in magnetite.

Uses: Natural nanomaterials have various applications in medicine, electronics, water treatment, energy storage, and environmental remediation.

Environmental health and safety impacts: The environmental impacts of natural nanomaterials can vary depending on their specific properties and applications. Concerns may arise regarding their potential toxicity, persistence in the environment, and possible accumulation in organisms. Proper disposal and regulation of their use are essential to minimize any adverse effects.

Engineered Nanomaterials:

Examples: Gold nanoparticles, quantum dots, titanium dioxide nanoparticles, carbon nanomaterials (e.g., graphene), silica nanoparticles.

Uses: Engineered nanomaterials have widespread applications in electronics, cosmetics, catalysis, energy storage, drug delivery systems, and sensors.

Environmental health and safety impacts: Engineered nanomaterials may pose potential risks to human health and the environment. Their small size and unique properties can lead to increased toxicity, bioaccumulation, and potential ecological disruptions. Safe handling, proper waste management, and risk assessment are necessary to mitigate any adverse effects.

Organic Nanomaterials:

Examples: Nanocellulose, dendrimers, liposomes, organic nanoparticles (e.g., polymeric nanoparticles), nanotubes made of organic polymers.

Uses: Organic nanomaterials find applications in drug delivery, tissue engineering, electronics, flexible displays, sensors, and optoelectronics.

Environmental health and safety impacts: The environmental impact of organic nanomaterials is still under investigation. Depending on their composition and properties, they may exhibit varying levels of biocompatibility and potential toxicity. Assessments of their environmental fate, exposure routes, and potential hazards are crucial for ensuring their safe use and minimizing any adverse effects.

Inorganic Nanomaterials:

Examples: Quantum dots (e.g., cadmium selenide), metal oxide nanoparticles (e.g., titanium dioxide), silver nanoparticles, magnetic nanoparticles (e.g., iron oxide), nanoscale zeolites.

Uses: Inorganic nanomaterials are utilized in electronics, catalysis, solar cells, water treatment, imaging, and antimicrobial applications.

Environmental health and safety impacts: Inorganic nanomaterials may have environmental impacts related to their potential toxicity, persistence, and release into ecosystems. Their interactions with living organisms and ecosystems require careful assessment to ensure their safe use and minimize any negative effects.

Understanding their properties, fate, and behavior in different environments is crucial for responsible development, use, and disposal of nanomaterials.

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Answer:

ocean

Explanation:

because its easy

Answer:

Explanation:

Overuse of antibiotics leads to bacteria's resistance against our drugs. This is increasing at an alarming rate and the reason is that overuse of antibiotics kills bacteria that lack the "resistance" gene or gene that can help them survive the antibiotics (similar is the case for insects that die to insecticides). But, some bacteria can have random mutations in their gene that can help them survive the antibiotic (similar is the case for some insects that can survive the insecticide), thus the surviving bacteria give rise to next generation of bacteria that are resistant to the given antibiotic (similar to how insects that survive the insecticide give birth to new insects that are resistant to insecticide too). Soon, every generation adds new antibiotic resistant bacteria (or new insecticide resistant insects in the case of insects) which is dangerous for all of life on this planet. Therefore, both are similar in the sense that new generations of these organisms will be resistant to our weapons against them.

Answer:

1. Svante Arrhenius

2. Johannes Nicolaus Brønsted and Thomas Martin Lowry

3. Gilbert N. Lewis

Explanation:

The scientist mentioned above researched and made their tested hypothesis available for further research to be built on them and they do these researches to help human understanding of the field and therefore improve knowledge.

Through their different definitions of acid which includes the ability of hydrogen ion (H+) to be produced when a substance is separated from water, the ability of acid to donate a proton (H +), It can be concluded that acids contain hydrogen and they have the ability to donate that  (H +) to other substance.

Answer:

A) Shaken is the correct answer

Explanation:

The other three don't fit in with the solution if you think about it. When you shake something with lemonade crystals (Like a lemonade flavor packet in poured in a water bottle) it dissolves faster when you shake it rather than it sit on the bottom for 15 minutes! :) .

Hope this helps! :)

Answer:

The Person above me is correct

Explanation:

I got it right first try 100%

Answer: See below

Explanation:

1.

\(\text{2.57 grams C} \, \, \cdot \frac{1 \text{mol C}}{12.011 \text{g}} \cdot \frac{6.022 \cdot 10^{23} \text{atoms}}{1 \text{mol}} = 1.29 \cdot 10^{23} \text{ atoms of C}\)

2.

\(108 \text{ grams Cl}_2} \,\, \cdot \frac{2 \text{ Cl atoms}}{1 \text{Cl}_2 \text{ molecule}} \cdot \frac{1 \text{ mol Cl}}{35.453 \text{g}} \cdot \frac{6.022 \cdot 10^{23} \text{atoms}}{1 \text{ mol Cl}} = 3.67 \cdot 10^{24} \text{ atoms of Cl}\)

3.

\(1.00 \,\cdot 10^{20} \text{ atoms Na } \cdot \frac{1 \text{mol Na}}{6.022 \cdot 10^{23} \text{ atoms}} \cdot \frac{22.990 \text{g}}{1 \text{mol Na}} = 0.00382 \text{ grams Na}\)