What’s the answer?? Please and thank you

The atomic number of an element tells you the number of  Electrons & Proton

A stable subatomic particle with the symbol P, H+, or 1H+, a proton has an electric charge of +1 e. Its mass is 1,836 times greater than that of an electron and only slightly less than that of a neutron. Nucleons are the collective name for protons and neutrons, which have masses of roughly one atomic mass unit apiece.

The positively charged particles called protons are found in the atom's nucleus. The strong force, which is stronger at short distances, pulls the protons together while the electromagnetic force pushes them apart.

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While at rest, a normal animal cell has a high concentration of K+ ions within and a high concentration of Na+ ions outside. Outside of the cell, there are also more Cl- ions present.

While at rest, a normal animal cell has a high concentration of K+ ions within and a high concentration of Na+ ions outside. Outside of the cell, there are also more Cl- ions present. As a result, the cell membrane experiences an electrical potential differential and concentration gradient. At a typical resting potential of -70 mV, the potential difference is negative inside the cell and positive outside the cell. This potential is kept constant and allows for cell processes like signalling and metabolism by the passage of ions across the membrane via ion channels and pumps. The total charge balance inside the cell is also influenced by other anions, such as proteins and phosphates.

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A 183 g sample of bleach contains 14.0 g NaOCl. 7.65% is the mass percent of NaOCl in the bleach.

Mass percent is the means to indicate a concentration. Moreover, it defines the element in a certain composition. A mass percentage can be used to understand the solution's composition.

It displays the amount of solute in a certain amount of solution. The solute's concentration is specified in terms of mass or moles. It's possible to represent a degree using the mass percent. Also, it describes the element during a certain mixing.

mass percent = (solute mass / mass of solution)×100

mass percent = (14.0 / 183)×100 = 7.65%

Therefore, 7.65% is the mass percent of NaOCl in the bleach.

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49.70075 grams of sulfur make up 1.55 mol of sulfur. Sulfur atoms have masses of 32.07 amu and 32.07 g per mole, respectively.

G/mol units are the starting point for calculating molar mass. We can find out how many grams make up one mole of a chemical molecule by computing its molecular weight. The weight of a particular formula is just the sum of the atomic masses of all the constituent parts.

The National Institute of Standards and Technology, or NIST, provided the atomic weights used on this website. We employ the most typical atoms. This is how isotropically weighted averages are used to determine the molar mass (average molecular weight). This differs from molecular mass, which is the weight of a singular molecule made up of distinct isotopes. For computations involving bulk stoichiometry, Typically, we are calculating molar mass, also known as normal atomic weight or average atomic masses.

1 gram of sulfur equals how many moles? 0.031186652112896 is the correct response.

It is assumed that you are changing between grams and moles of sulfur.

sulfur's chemical weight in grams

Sulfur's chemical formula is S.

The mole is the SI base measure for substance amount.

Sulfur has a molecular weight of 1 mole, or 32.065 grams.

Rounding errors could happen, so make sure to always double-check your findings.

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Therefore, the volume of the balloon when heated to 88°C is 2.432 L.

In the case of a gas, the volume is the amount of space that the gas occupies in a container. The volume of a gas can be affected by changes in pressure and temperature, as described by the ideal gas law. In this case, the volume is often expressed in terms of standard temperature and pressure (STP), which are defined as a temperature of 0°C and a pressure of 1 atmosphere (atm). In chemistry, volume is an important property for understanding the behavior of substances in chemical reactions. The volume of reactants and products can be used to determine the stoichiometry of a reaction, which is the relationship between the amounts of reactants and products in a chemical equation.

Here,

To solve this problem, we can use the ideal gas law, which states that:

PV = nRT

where P is the pressure of the gas, V is its volume, n is the number of moles of gas, R is the universal gas constant, and T is the temperature in Kelvin.

Since the pressure of the gas is assumed to remain constant, we can rearrange the ideal gas law to solve for V:

V1/T1 = V2/T2

where V1 is the initial volume of the balloon, T1 is the initial temperature in Kelvin (24°C = 297 K), V2 is the final volume we want to find, and T2 is the final temperature in Kelvin (88°C = 361 K).

Using this equation, we can plug in the given values and solve for V2:

V1/T1 = V2/T2

2.00 L / 297 K = V2 / 361 K

Multiplying both sides by 361 K, we get:

V2 = 2.00 L x (361 K / 297 K)

V2 = 2.00 L x 1.2162

V2 = 2.432 L

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The colligative properties depend only on solute concentration; the identity of the solute is not important. It is true.

The colligative properties of a solution depend on the number of molecules or ions in the solute, not on the identity of solute. Osmotic pressure, boiling point elevation, freezing point depression, and vapor pressure depression are examples of ligand-like properties.

The total number of solute particles in a solution affects the colligative property of the solution. The chemical composition of the components has no effect on these properties. Therefore, the type of solvent has no effect on colligative power.

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Answer:

approximately equal to 152 grams of uranium

Explanation:

1. to find the number of atoms in 25.0 grams of potassium, we can find the number of moles of potassium in 25.0 g by dividing that by the molar mass (found on a standard IUPAC periodic table) and then multiply that by Avogadro's constant, the number of 'items' (molecules, atoms, ions, etc...), which is 6.022×10²³ to get the number of atoms in 25.0 g of potassium.

n(K) = m/M = 25.0/39.10 = 0.639386... mol of potassium.

N(K) = n×Nₐ = 0.639386...×6.022×10²³ = 3.85038...×10²³ atoms

2. In uranium, 3.85038...×10²³ atoms also equals 0.639386... moles. We can multiply this number by the molar mass of uranium (grams per mole), to get the mass of uranium.

m(U) = nM = 0.639386...×238.0 = 152.1738...

Therefore, the mass of uranium which contains the same number of atoms as 25.0 g of potassium ≈ 152 g

Pure liquids and solids are not included in the equilibrium constant expression because their concentrations do not change significantly during the reaction and they do not affect the reaction quotient.

Pure liquids and solids are often ignored when writing the equilibrium constant expression because their concentrations remain constant and do not affect the equilibrium position. This is due to their very low vapor pressures compared to the gaseous reactants and products.

For example, in the reaction A(s) + B(g) ⇌ C(g) + D(l), the concentration of the liquid D remains constant and does not change the equilibrium position. Therefore, it is not included in the equilibrium constant expression.

In reactions involving aqueous solutions, the concentration of water is included because it can vary significantly and affect the equilibrium position.

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When trimyristin is treated with NaOH and aqueous ethanol. the products formed are sodium myristate and glycerol. Thus, c is the correct option.

Triglycerides are tri-esters formed by the combination of a glycerol molecule with three molecules of fatty acids. It is an example of fat or lipid present in the human body and a good source of energy. 3 moles of myristic acid can be produced from one (1) mole of trimyristin.

Trimyristyin can be isolated from nutmeg by extraction, it is a triglyceride, it belongs to the organic compounds known as esters and it can be base hydrolyzed to produce fatty acid salts.

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Hydrogen bonds are responsible for base pair formation of in the DNA. Covalent bonds are found in each linear strand  of the DNA double Helix.

The DNA double helix is held together by two types of bonds. Those are covalent and hydrogen. Covalent bonds occur within each linear strand of DNA. It strongly bond the bases, sugars, and phosphate groups  that both within each component and between components. Hydrogen bonds occur between the two strands and involve a base from one strand with a base from the second in complementary pairing in the DNA. The hydrogen bonds are individually weak but quite strong together. A hydrogen bond donor includes the hydrogen atom and the atom to which it is most tightly linked with.

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Carboxylic acids are important chemical compounds with a wide range of uses in various industries like food, pharmaceutical, polymers , agriculture etc.

1. Food industry: Carboxylic acids, such as acetic acid and citric acid, are used as food additives to give foods and beverages a sour or acidic taste. Certain carboxylic acids, such as fatty acids, are employed as food preservatives as well.

2. Pharmaceutical industry: Carboxylic acids are utilized as starting materials in the production of a variety of medications, including aspirin (acetylsalicylic acid) and penicillin. They are also active chemicals in several topical skin treatments, such as salicylic acid for acne.

3. Carboxylic acids, such as acrylic acid, are utilized in the synthesis of polymers such as acrylic polymers and superabsorbent polymers, which have a variety of applications such as diapers, hygiene products, and coatings.

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The point of equilibrium will shift in a way that causes the temperature to decrease after you raise it. This will be accomplished by encouraging the process that absorbs heat.

Despite recent significant price increases, central gas heating remains the most affordable method of heating a home. However, for many of us, heating with electricity is the only choice.

The most prevalent kind of house heating system is forced air distribution. They use a furnace with a blower fan that circulates heated, conditioned air through a system of ducts to the house's various rooms.

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Potassium hydroxide, or KOH, is an inorganic substance.

To create a homogenous mixture, a solvent chemically dissolves with another component.The liquid's vapour pressure will decrease.

Because the equilibrium of a vapour above its liquid is represented by the vapour pressure of a liquid.

It is, in other words, the pressure of the vapour produced as a result of a liquid evaporating above a specific sample of the liquid in a closed container.

The temperature affects a liquid's vapour pressure in a closed container.

The vapor pressure of the solvent (above the resultant solution) is lower when a solute is added than the vapour pressure above the pure solvent.

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Answer: Fingerprints are not conclusive evidence on their own.

Explanation:

The thief could have worn gloves and those fingerprints could belong to the owners. If the fingerprints don't match those of the owners', you would still need more evidence to prove that those belong to the killer, such as their whereabouts at the time the vase was stolen, motive, etc. Fingerprints are not conclusive evidence on their own.

The nonmetallic elements from the list are: Oxygen, Boron, Argon and Carbon. Option B, C, E, and G will be correct.

Nonmetallic elements are elements that generally lack metallic properties such as luster, malleability, ductility, and electrical conductivity. They are located on the right side of the periodic table, except for hydrogen, which is located on the top left corner.

Nonmetals have different physical and chemical properties, but some of their common characteristics include: They are poor conductors of heat and electricity.

They are typically brittle solids or gases at room temperature, except for bromine, which is a liquid.

They have low melting and boiling points compared to metals.

Nonmetallic elements play important roles in various chemical reactions and are essential to life, such as oxygen and carbon.

Hence, B.C.G.E. Oxygen, Boron, Argon and Carbon are the correct options.

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Fatty acids are organic molecules that consist of a long hydrocarbon chain and a carboxyl group (-COOH) at one end. They can exist in different forms, but their most common structure is a linear, unbranched chain of carbon atoms with hydrogen atoms attached to most of the carbons.

The carboxyl group at the end of the chain is polar and hydrophilic (water-loving), while the hydrocarbon chain is nonpolar and hydrophobic (water-fearing). This makes fatty acids amphipathic, meaning they have both hydrophilic and hydrophobic properties.

Fatty acids are the building blocks of many lipids, including fats, oils, and phospholipids. They play important roles in energy storage, membrane structure, and cellular signaling.

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Infrared light can be used to measure molecular polarity. Therefore, the correct option is option D.

A molecule or its chemical groups have an electric dipole moment with a negatively charged end and a positively charged end when they are polar, which in chemistry is the separation of electric charge. Because the bonded atoms' electronegativity differs, polar compounds must have one or more polar bonds. If the bond dipoles cancel one other out via symmetry, molecules with polar bonds are not polar. Infrared light can be used to measure molecular polarity. Dipole-dipole intermolecular forces and hydrogen bonding are how polar molecules communicate with one another. Many physical characteristics, including as surface tension, solubility, and melting and boiling points, are based on polarity.

Therefore, the correct option is option D.

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The correct name for NO₂ is nitrogen dioxide.

NO₂ is a chemical compound composed of one nitrogen atom and two oxygen atoms. It is a reddish-brown gas with a pungent odor and is a major component of air pollution.

Nitrogen dioxide is an important intermediate in the formation of smog and acid rain in the atmosphere. It is also used as a reagent in the production of nitric acid, which is used in the production of fertilizers and explosives. Exposure to high concentrations of NO₂ can cause respiratory problems and contribute to the development of asthma and other lung diseases.

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The two main electron carriers' reduced forms are represented by NADH and FADH2 in the list.

The electron carrier is reduced to NADH, which is then changed into NAD+. The electron carrier becomes oxidized as a result of this reaction's first half. Lactic acid is produced during this process from pyruvate.

Reduced electron carriers FADH2 and NADH carry electrons into complexes I and II, respectively, of the electron transport chain. They undergo oxidation during the process, generating NAD+ and FAD. Flavoproteins, iron-sulfur clusters, quinones, and cytochromes are additional electron carriers in the electron transport chain.

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Chlorine is an atomic number 17 chemical element with the symbol Cl. It belongs to the halogen group and is found in the periodic table's third row, or period, and second column.

or group 17. (also known as the "halogen group" or "halogens"). Other elements in the halogen group include fluorine, bromine, iodine, and astatine, which have comparable chemical features such as strong electronegativity and reactivity. At room temperature, chlorine is a yellow-green gas that is a powerful oxidizing agent that may react with a wide range of other elements and compounds. It is frequently used in water treatment, disinfection, and the manufacturing of chemicals like as solvents, insecticides, and polymers.

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°C is the symbol used for degrees Celsius, a unit of temperature in the metric system.  Thus, option D is the answer.

°C is the symbol used to represent degrees Celsius, which is a unit of temperature in the metric system. It is named after the Swedish astronomer Anders Celsius, who first proposed the Celsius temperature scale in 1742.

The Celsius scale is based on the freezing and boiling points of water, with 0 °C being the temperature at which water freezes and 100 °C being the temperature at which water boils at standard atmospheric pressure.

The Celsius scale is widely used in scientific and engineering applications, as well as in everyday life, particularly in countries that use the metric system. It is an important measurement in areas such as weather forecasting, medicine, and industrial manufacturing.

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The minimum amount of energy required for a chemical reaction to occur is known as activation energy. The energy barrier must be crossed for a reaction to progress from reactants to products.

In other words, it is the amount of energy required to break the bonds of the reactant molecules and form new bonds in order to form the product molecules.

On a reaction energy diagram, the activation energy is typically represented as a barrier, with the reactants on the left side, the products on the right side, and the activation energy barrier in between. The reaction rate is determined by the height of the activation energy barrier; the higher the barrier, the slower the reaction rate, and the lower the barrier, the faster the reaction rate.

In general, increasing the temperature, pressure, or concentration of reactants increases the probability that reactant molecules will have enough energy to overcome the activation energy barrier and undergo the reaction. Catalysts can also lower the activation energy barrier, allowing the reaction to happen faster and more efficiently.

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Tiana is developing a chemical additive to be used in swimming pools.

Chemical additives are substances added to products to alter or improve their performance. They are used in a wide range of consumer products and industrial processes for a variety of purposes including improving shelf-life, enhancing flavor, or increasing the efficiency of a process. Common examples of chemical additives are preservatives, colorants, emulsifiers, antioxidants, stabilizers, and thickeners.

This additive is designed to help keep the pool clean and sanitary, by removing bacteria and other contaminants from the water. The additive is also designed to help balance the pH of the pool water, to ensure that it is safe for swimming and does not irritate swimmers' skin or eyes. The chemical additive must also be safe to use, and must not cause any adverse reactions in swimmers. Tiana's work involves testing different chemical compounds to find the most effective and safe additive for pool water.

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d. calcium and oxygen would not be capable of forming an ionic bond. Ionic bonds form between elements with significantly different electronegativity values, where one element loses an electron and the other gains it.

Elements with similar electronegativity values would not be capable of forming an ionic bond. Option A, phosphorus and chlorine, and option B, barium and nitrogen, have significantly different electronegativity values and are capable of forming ionic bonds. Option C, iodine and sodium, can form an ionic bond since sodium is a metal and iodine is a nonmetal. Option D, calcium and oxygen, cannot form an ionic bond since both elements have similar electronegativity values and prefer to form covalent bonds.

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Complete question:

Which two elements would NOT be capable of forming an ionic

bond?

a phosphorus and chlorine

b barium and nitrogen

c iodine and sodium

d. calcium and oxyge​n

It is possible to determine the direction of blood flow from blood spatter B. By looking at the shape of the drip and tail to see the possible direction.

The shape of blood spatter can provide information about the direction and speed of blood flow, as well as the angle of impact, the type of weapon or force that caused the bloodshed, and other details about the crime scene.

One way to determine the direction of blood flow from a blood spatter pattern is to examine the shape of the spatter. Blood drops that are elongated or have a tail shape may indicate the direction of travel of the blood, since they tend to be stretched in the direction of motion.

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The one that is not classified as the hazardous is the Annoying. The correct option is d.

There are the four types of the hazards : the chemical, the biological, the ergonomic, and the physical hazard. The hazardous wastes are the solid, liquid, or the gas wastes that are the toxic, the flammable, the corrosive, reactive, or the radioactive.

When the substance is used and will thrown away and it can be lead to the damage in the environment as it will  produce the some toxic or the hazardous gases is known as the hazardous . These  can be the solid, liquid or the gaseous.

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The bond angle for a molecule with a tetrahedral shape is given as 109.5° C. Hence, the correct option is A.

Generally, bond angle is defined as the angle which is present between the two bonds i.e. angle between the two orbitals containing bonding electron pairs around the central atom in a complex molecule or ion. It is usually measured in the terms of degrees and is calculated using spectroscopic method.

Generally, the valence shell electron pair repulsion (VSEPR) theory is defined as a model used to predict 3-D molecular geometry based on the number of valence shell electron bond pairs among the atoms in a molecule or ion. This model usually assumes that the electron pairs will often arrange themselves in order to minimize the repulsion effects from one another.

Therefore, according to VSEPR Theory, the bond angle of a tetrahedral molecule is 109.5°. Hence, the correct option is A.

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The Electron Pair Geometry and molecular geometry of a molecule is determined by the electron group by counting the total number of electron pairs around a central atom.

Electron Pair Geometry defined as the the spatial arrangement of a molecule's bonds and lone pairs. It is determined by the number of electron groups. Molecular geometry can be explained as the geometry which depends on not only on the number of electron groups but also on the number of lone pairs. When the electron groups are all bond pairs, they are named exactly like the electron pair geometry. The electron pairs are the bonded electrons, lone pairs and single unpaired electrons. It the total number of electron pairs is estimated the electron pair geometry of the molecule can be drawn.

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Answer:

an iron nail

Explanation:

iron metal can be corroded in a basic medium,

so iron nail can be corroded by a base

Answer: A leather saddle

Explanation: