A solution of iron (III) chloride has a density of 1.118 g/mL. What volume of solution would have a mass of 1.75 kg?​

Answer:

Proportion : The Equality of two ratios

Equation:  Values of two mathematical expressions are equal.

Formula: Mathematical relationship or rule expressed in symbols.

Explanation:

Empirical formula for the hydrocarbon is C₅H₂

Moles of C=6.43CO2 x 1 mol CO₂/44 g x 1 mol C/mol CO₂=0.14 moles of C

Moles of H=2.19 H₂O x 1 mol H₂O/18 g x 2 mol H/mol H₂O=0.12moles of H

Dividing both by 0.14

1 mol C=0.8571mol H

Multiplying both by 3

5 mol C

2 mol H

Empirical formula =C₅H₂

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A covalent bond involves: d. sharing electrons

The atoms of a molecule are held together by electrical forces that hold the atoms together, this is due to the electrical attraction between the electrons of the atom of one element and the nucleus of the other atom, this force of attraction is called covalent bond.

A covalent bond involves the sharing of electrons that are in the last energy layer of the atoms because they are the most likely or willing to be shared.

An example of a covalent bond is the bond between a hydrogen atom and a carbon atom in methane.

The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.

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A Scientist test a small section of a carrot root to determine the type of molecules were present. the results showed that the molecule contained carbon , hydrogen , and oxygen . the option d is correct (d) both (a) and (c)

(a)the molecule are a type of carbohydrate (c) the carrot contains some type of sugar.

Carrot is one of the important root vegetable rich in bioactive compounds. carbohydrates are made up of carbon , hydrogen and oxygen. carbohydrates are sugar molecules. The main three carbohydrates : sugar , starches and fiber. The carrot vegetable we eat is the taproot of carrot plant. The sucrose is major transport and storage sugar but it convert into starch. Carbohydrates provides energy for living things.

Thus, A Scientist test a small section of a carrot root to determine the type of molecules were present. the results showed that the molecule contained carbon , hydrogen , and oxygen . the option d is correct (d) both (a) and( c)

(a)the molecule are a type of carbohydrate

(c) the carrot contains some type of sugar.

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When combing your dry hair with a tough rubber comb, you rub electrons from your hair onto the comb then our hair is charged because On rubbing the comb with dry hair, the electrons from the hair are transferred to the comb due to Static energy.Hence comb becomes charged .

What is Static energy?

Static electricity is an imbalance of electric charges within or on the surface of a material or between materials.

Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build abreast of the surface of an object until they find a way to be released or discharged.

What is static energy used for?

Static electricity has several uses, also called applications, within the real world. One main use is in printers and photocopiers where static electric charges attract the ink, or toner, to the paper. Other uses include paint sprayers, air filters, and mud removal. electricity can also cause damage.

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Answer:

I think it's false

Explanation:

The diameter of a hydrogen atom is 1.04 × 10⁻⁷ meters.

Diameter or the atomic radius of an atom is a measure of the size of that atom. It is distance from the center of the nucleus to the outermost isolated electron of an atom.

d(H) = 1.04 × 10⁻¹⁰ m; a diameter of hydrogen atom

If a protein molecule has an overall length of 1000 times(1×10³) the diameter of a hydrogen atom, than:

d(protein) = 1.04 × 10⁻¹⁰ m × 1×10³

d(protein) = 1.04 × 10⁻⁷ m; diameter of a protein molecule

Protein is composed of amino acid linked with peptide bond.

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7.5ml distilled water is used to 0. 0 ml of a 0. 25% m/v hcl solution if 1% m/v hcl was available

Here so 2.5 ml of 1% m/v HCl and (10 - 2.5) = 7.5 ml distilled water taken to prepare 10 mL of a 0.25% m/v HCl solution. 2.5 mL of 1 % m/v HCl is needed. 7.5 ml of distilled water is used to make 10ml solution and in that solution 1% hcl means 3.6 hcl is needed. mass of hcl is 36g/mol

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At 223.3°C the solution will boil.

The organic substance methyl salicylate has the chemical formula C₈H₈O₃. It is salicylic acid's methyl ester. It is a clear, viscous liquid that is commonly referred to as "minty" since it is a component of mint candies. It has a sweet, fruity aroma reminiscent of root beer.

Lye and caustic soda are other names for sodium hydroxide, an inorganic substance having the formula NaOH. It is a white, solid ionic substance made up of the cations sodium (Na+) and the anions hydroxide (OH).

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In the original sample of substance X, there are 12 molecules and each molecule is made of 2 small red spheres and one blue sphere in the middle.

Change 1 has the same total number of red and blue spheres as the original sample, but the structure of molecules has changed. As a result, this is a chemical change.

In Change 2, the structure of molecules is changed. Some molecules contain solely red spheres, whereas others include both red and blue spheres. Furthermore, the total number of molecules is greater than the number of molecules in the original sample. This violates the principle of conservation of mass.  Hence, this is an impossible change since extra matter was created in this change.

In Change 3,  the number of the molecules and the structure of the molecules is same as the orignial sample. Hence, it is a physical change.

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carbonic acid (h2co3) is a weak acid formed when carbon dioxide dissolves in water. The ions present in a carbonic acid solution are H+ and HCO3–.

Carbonic acid is a weak acid with a chemical formula of H2CO3. In the presence of water, the partial dissociation of the carbonic acid occurs to produce H+ and HCO3– ions.

It is an inorganic compound also known as diprotic acid because it can form two types of salts; carbonates and bicarbonates. It is produced at industrial level as a by-product during the burning of the fossil fuels.

Carbonic acid is used to prepare carbonated water, sparkling wine. It can also be used to remove carbon dioxide from water.

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When you place a piece of cool metal in the sun, it is heated by the sun’s energy they show that heat flows from warmer to cooler

In the given example conduction concept are seen conduction means conduction is the transfer of heat energy from one substance to another or within a substance in which heat is transferred via conduction and when heat energy is converted through piece of metal then the substance itself does not flow and heat is transferred internally, by vibrations of atoms and molecules and electrons can also carry heat, which is the reason metals are generally very good conductors of heat

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Answer:

27.2 kg

Explanation:

13.6 * 2 L of commercial flask of mercury = 27.2 kg.

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If 16% of the nucleotides in one strand of a DNA molecule contain the base g, what percent of the nucleotides on the complementary strand will also contain the base g but it is impossible to determine from the information given.

DNA double helix. The hydrogen bonds are damaged and the helix is ​​opened. Each strand of DNA acts as a template for synthesizing a brand new complementary strand. During replication, equal DNA double helices are formed, every with a brand new strand and a vintage strand.

Also, cytosine (C) enhances guanine (G) and adenine (A) enhances thymine (T). Therefore, the complementary strand for 5'-TAGAC 3' is 3'-ATTCG 5', similar to alternative c.

His Chargaff's discovery of A = T and C = G, combined with a few very essential X-ray crystallographic research through British researchers Rosalind Franklin and Maurice Wilkins, Watson Contributed to Crick's derivation of his 3-D double helix model. DNA structure.

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Acid A is 10^4 = 10000 times stronger than B. This istrue if acid A has a pKa of 5 compared acid B with Pka of 9.

Acid strength is quantified by the acid dissociation constant (Ka). The acid is more potent the higher the value. A higher pka indicates lower acidity. Therefore, a weaker acid results from a greater pKa and a smaller Ka. A weaker acid is one with a higher pKa.

Since pKa = -log10(Ka), an acid is 10 times stronger for each pKa value of 1 below another. Acid A is therefore 10^4 = 10000 times stronger than acid B.

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The energy released when electron move from n=4 to n=3 is 0.66 eV

We know that in an atom energy of nth state is

                                     [tex]E_n = -13.6/n^{2}[/tex]  eV

where n is the energy level

Therefore,

                   [tex]E_4 = -13.6/4^{2} \\E_3 = -13.6/3^{2}[/tex]

Thus, [tex]E_4[/tex]  =   -0.85eV

         [tex]E_3[/tex]  =  -1.51eV

Therefore, total mount of energy released in moving electron from n=4 to n=3 is given by -

                                       [tex]E_4 -E_3[/tex]

                                   =  -0.85 - ( -1.51)

                                   = 0.66eV

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The volume of oxygen required at STP is 7 L.

STP is a pressure of a hundred kPa and a temperature of 273.15 k. Or, 1 mole of any perfect gasoline occupies 22.7 L at STP.

therefore, we need to discover the range of moles of oxygen required within the reaction.

using the molar mass of water,

10.five g × 1 mole of water/ 18.02 g = 0.577 moles of water.

1: 2 is the ratio between oxygen and water in a water molecule, because of this 1 mole of oxygen produces 2 moles of water.

0.577 moles of H₂O × 1 mole O₂ / 2 moles of H₂O = zero.2885 moles O₂.

So, if 22.7 L at STP is occupied via 1 mole, then

zero.2885  × 22.7 L / 1 mole = 6.548 L

Rounded to the nearest entire wide variety, we get 7 L.

consequently, the quantity of oxygen at STP is 7L.

standard temperature and strain (STP) is described as 0oC (273.15K) and 1atm strain. The molar extent of a gasoline is the extent of 1 mole of a fuel at ​​​​​​​ STP . At STP, one mole (6.02×1023 representative debris) of any gasoline occupies a volume of twenty-two.4L

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The phosphate molecule that is released it is coupled to a different ADP molecule to make new molecule of ATP.

Hydrolysis of high-energy compound (ATP) using water:

ATP + H₂O → ADP + Pi

ATP is short for adenosine triphosphate.

Hydrolysis is a reaction that breaks down the chemical bonds between molecules via the addition of a water molecule.

A condensation reaction is a reaction that joins two molecules in a chemical bond.

ATP is resynthesized in a condensation reaction that adds an inorganic phosphate group to ADP. The addition of a phosphate group is catalyzed by the enzyme ATP synthase.

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The net ionic equation for the overall reaction that occurs when aqueous solutions of carbonic acid and potassium hydroxide are combined is:-

H₂CO₃ + KOH ⇒ K₂CO₃ + H₂O

The reaction between an acid and base is known as a neutralization reaction.

In a neutralization reaction, an acid and a base react to produce a salt and water along with it.

Here H₂CO₃ is a weak acid and KOH is a base.

We have been given the information that the base i.e. KOH is present in excess amount.

Thus, the reaction between H₂CO₃ and KOH is as follows:

H₂CO₃ + KOH ⇒ K₂CO₃ + H₂O

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The metal sample with a density of 1.56 g/l  and a volume of 250ml, has a mass of: 0.39 g

The density formula and the procedure we will use is:

ρ = m/v

Where:

Information about the problem:

By converting the volume units from (ml) to (l) we have:

v= 250ml * 1 l /1000 ml

v = 0.25 l

Applying the density formula and clearing the mass (m), we get:

m = ρ * v

m = 1.56 g/l * 0.25 l

m = 0.39 g

It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.

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Fatty acids that have been chemically altered so that hydrogen atoms are on opposite sides of a double bond are called trans fatty acids.

What are fatty acids?

Fatty acids are the building blocks of fat found in both our food and our body. During digestion, the body transforms lipids into fatty acids so they may be absorbed into the bloodstream. Three fatty acid molecules are joined together to form a molecule called a triglyceride.

Saturated, monounsaturated, and polyunsaturated fatty acids are all present in dietary fats. Even while meals include all three forms of fatty acids, they are frequently grouped according to the prevalent type.

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Even though h-bonding occurs in ammonia and ethanol, they cannot be used to replace water in living cells because compared to amonia and ethanol, water is more polar.

Compared to amonia and ethanol, water is more polar and may form H bonds. Additionally, water is a better solvent or can dissolve a wide variety of solvents that are employed by living cells.

Hydrogen bonds can be formed by ammonia. When hydrogen bonds between water molecules are disrupted, comparable links between water and ammonia molecules can take their place. Ammonium and hydroxide ions are created when some of the ammonia combines with the water.

A hydrogen bond can develop between a water molecule and an ethanol molecule if there is just one pair of electrons in the water molecule, which will link with the oxygen atom and the polar hydrogen atom to create the bond.

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Aerobic refers to exercise that primarily uses the oxygen-dependent energy system, oxidative phosphorylation.

Aerobic Respiration is the method of cellular respiration that takes place in the presence of oxygen gasoline to produce electricity from food. This type of breathing is frequent in most of the plant life and animals, birds, humans, and different mammals. In this process, water and carbon dioxide are produced as quit products.

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The nurse would want to call a rapid response, place the patient on oxygen, and prepare for the administration of Epinephrine. This drug is the first-line treatment for anaphylactic shock, and It will increase blood pressure, decrease swelling, and dilate the airway.

“Nursing is not an easy job. It takes physical and mental stamina to survive a 14-hour shift.” If you believe, you may find yourself thriving. in the midst of activity.

There is much to learn. The exams are difficult, the schedules are complex, and the challenges pile up. All these factors can make life as a student difficult. Nursing is a highly competitive field from the moment you start the application process until you graduate.

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Answer: Gas has loosely packed atoms, liquids have mediumly packed atoms, and solids have tightly packed atoms.

Explanation: Solids have tightly packed atoms which is what keeps them in their defined shape. They have a defined volume and a defined shape.

Liquids have mediumly packed atoms because liquids don't have a definite shape and take the shape of the container they are placed in. It has a definite volume, but an indefinite shape.

Gases have loosely packed atoms because gases can float around anywhere. They don't have a definite volume, and they don't have a definite shape.

The volume occupied by  a 22.2 g sample of gold having a density of 0.01932 kg/cm3.

As we know that the density of a given substance is :

 Density = mass/volume

Now to find the volume, reshuffle the formula:

volume = mass/ density

Now,

density = 0.01932 kg/cm3

mass = 22.2g = 0.0222 kg

Putting the values,
volume = 0.01932/0.0222

volume = 1.49 cm3

The volume is  1.49 cm3.

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The movement of particles from an area of high concentration to an area of lower concentration is known as Diffusion. There are two types of Diffusion; simple diffusion and facilitated diffusion.

Simple diffusion and facilitated diffusion have some similarities and differences.

Both simple diffusion and facilitated diffusion are passive processes and do not require energy. They both deliver transport molecules in the direction of a concentration gradient.

There are also some differences. The speed of simple diffusion is low as compared to facilitated diffusion. Simple diffusion does not require the assistance of carrier molecules but facilitated diffusion does.

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The rms speed of the molecule is 200 m/s at a temperature of 300K. Then, the mass of the individual molecule is 3.11 ×10⁻²⁵ Kg.

Given,

The rms speed of the molecule (Vrms) = 200 m/s

The temperature of the molecule (T) = 300K

We have to find the mass (M) of individual molecules.

The expression for root mean square speed measures the speed of particles in a gas is given by:-

Vrms = √3KT/M

By squaring both sides we get,

(Vrms)² = 3KT/M

(200)² = 3 × 1.33 × 10 ⁻²³ × 300 / M

Or, M = 3.105 × 10⁻²⁵ Kg

Hence, the mass of the individual molecule is 3.105 × 10⁻²⁵ Kg.

The root mean square (R.M.S) speed V of the molecules of an ideal gas is given by the expression, v=sqrt(3RTM) and v=sqrt(3KTm) where R is universal gas constant, T is the absolute (Kelvin) temperature, m is the molar mass, K is Boltzmann's constant and M is the molecular mass.

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The average kinetic energy of the particles in a substance is measured by its temperature. It is a typical particle's kinetic energy.

The thermal energy of an object is equal to the sum of the kinetic energies of all its constituent particles.

Thermal power

The sum of all an object's atoms and molecules' energies makes up the substance's total energy. Both the potential energy resulting from the forces between molecules and the kinetic energy of the particles resulting from the motions of molecules within the substance and of atoms within molecules make up thermal energy. The sum of the kinetic and potential energies is all that constitutes mechanical energy. Simply put, this amount is the total mechanical energy (abbreviated as TME).

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Answer:

-1.42, -0.375, 32.5% (.325), 3/8 (.375), √4 (2.0), 3 (3.0), 2³ (8.0)