a student dissolves 4.28 moles of k3po4 in water to produce 0.836 liters of solution. What is the solutions molarity

Explanation:

First find the mass of 1 mole of water (Molecular mass)

\( H_{2} O = 2H + O \)

\(

= 2(1) + 32 \)

\(

= 34 \: grams

\)

Hence 1 mole of water is 34 g

Compare

1 mole = 34 g

1.33 mole = x g

\( \frac{x}{34} = \frac{1.33}{1} \)

\(

x = 1.33 \times 34 \)

\(

\color{blue}{\boxed{x = 45.2}} \: \: \: \: to \: 3 \: s.f.

\)

Therefore 1.33 moles of water is 45.2 grams

The mass of the substances can be given by the molar mass and the moles of the substances. The mass of 1.33 mole of water is expressed in grams as, 23.94 grams.

The mass has been defined as the product of the moles of the substance and the molar mass in grams per mole. The mass is given in grams and has a formula,

Moles = mass ÷ molar mass

Mass = molar mass × moles

Given,

Moles = 1.33 moles

Molar mass of water (H₂O) is calculated as = 2 (1) + 16= 18 grams per mole

Using the formula of mole, mass is calculated as:

Mass = molar mass × moles

mass = 1.33 × 18

= 23.94 grams

The mass of the substance can be calculated if the value of the molar mass and the moles of the substance has been known. The molar mass of the substance can be calculated by adding the mass of the individual masses of the element in a molecule.

Therefore, 1.33 mol of water contains 23.94 grams.

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Most of the positively charged particles should bounce back at a range of angles as they collide with the atoms in the foil; only a few should pass straight through the foil.

After Maria creates the solution, the amount of the drug that is left would be around 1.10729 quarts.

The goal of pharmacy is to guarantee that pharmaceuticals are used in a safe, efficient, and cost-effective manner. Pharmacy is the science and practice of discovering, producing, preparing, dispensing, reviewing, and monitoring medications. It connects health sciences with pharmaceutical sciences and natural sciences, making it a diverse field of study.

First, multiply 2 quarts by the standard American unit of 0.9463529460 to convert them to liters.

Add your product, 1.89270589, to the 3 liters that are left.

You still have 1.0729411 quarts.

Instead, you would multiply 2 quarts by 1.13652 and proceed with the procedures if you were using imperial quarts.

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The complete question is

Maria works in a local pharmacy and must prepare a stock of a drug solution for a local veterinarian. The pharmacy has in stock 3 Liters of the drug solution and the veterinarian is needing 2 quarts.

How many quarts would be remaining of the Liter after Maria makes the solution ?

The electron configuration of Lu is [Xe] 4f14 5d1 6s2. When Lu loses 3 electrons to become Lu3+, it becomes [Xe] 4f14 5d0 6s2.

Since the 5d sublevel is empty, we can condense the electron configuration to [Xe] 4f14. Therefore, the condensed electron configuration of Lu3+ is [Xe] 4f14. The electron configuration of Lu3+ can be determined by first finding the electron configuration of the neutral Lu (Lutetium) atom and then removing three electrons from it. The electron configuration for Lu is [Xe] 4f14 5d1 6s2. Since Lu3+ has lost 3 electrons, we will remove 2 electrons from the 6s orbital and 1 electron from the 5d orbital. Therefore, the condensed electron configuration for Lu3+ is [Xe] 4f14.

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Answer:

Difusión

Explanation:

La difusión es el movimiento de las partículas de una sustancia desde una región de mayor concentración a una región de menor concentración.

La difusión es una evidencia de que la materia está compuesta de partículas.

Si abro un perfume en un extremo de una habitación, la fragancia se percibe en el otro extremo de la habitación después de unos segundos debido a la difusión

Answer:

red blood cells and diffusion.

Explanation:

this process involves red blood cells and diffusion. Red Blood cells (RBCs) are a type of blood cell whose role is to transport oxygen from the lungs to the peripheral tissues of the body. Oxygen diffuses from the alveoli of the lungs in to the RBC's, where it binds to hemoglobin.

Diffusion is a very important process within the human body and is essential to the transport of molecules within a number of organs including the lungs, kidneys, stomach and eyes. The lungs process millions of tiny air sacs that are called alveoli, each of which are in close contact with capillaries.

Answer:volume

Explanation:

If you added 0.5 g of sample 1 instead of 2.0 g, the freezing point temperature of the solution would decrease.

When a solute is added to a solvent, it disrupts the formation of the solvent's crystal lattice structure, lowering the freezing point of the solution. The extent to which the freezing point is lowered depends on the concentration of the solute particles in the solution. In this case, by reducing the amount of sample 1 from 2.0 g to 0.5 g, the concentration of solute particles in the solution would decrease.

Since the freezing point depression is directly proportional to the concentration of solute particles, a decrease in the amount of sample 1 would result in a smaller decrease in the freezing point temperature compared to if 2.0 g were added. In other words, the solution would experience a less significant decrease in freezing point temperature with only 0.5 g of sample 1.

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There are a total of four possible stereoisomers for 1,2-dimethylcyclopropane. This is because there are two methyl groups on the cyclopropane ring, which can be either on the same side (cis) or opposite sides (trans) of the ring.

Additionally, each of these configurations can be either R or S stereoisomers. Therefore, there are four possible stereoisomers: cis-R, cis-S, trans-R, and trans-S. It is important to note that pairs of enantiomers (such as cis-R and cis-S) are counted as two different stereoisomers because they are mirror images of each other and cannot be superimposed. Overall, understanding the stereochemistry of molecules like 1,2-dimethylcyclopropane is crucial in fields such as organic chemistry, where understanding how molecules interact and react with one another is essential.

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If one form of a gene can mask the appearance of another form, that form is considered dominant over the other form. Option B.

According to Mendel, genes are usually made up of 2 alleles. These alleles can be the same or different. When the alleles are the same, the gene is said to be homozygous. If the alleles are different, the gene is said to be heterozygous.

When the two alleles that make up a gene are different, one will be dominant and the other will be recessive. The dominant gene masks the effect of the recessive gene. In other words, the recessive gene cannot be expressed as long as it coexists with the dominant gene. In order for it to be expressed, it has to be in two copies or a homozygous recessive form.

For the dominant allele, however, only one copy is needed for it to be expressed.

In summary, if one form of a gene can mask the appearance of another form, that form is considered dominant over the other form.

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To answer this question, we need to use the ideal gas law, which is PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature. We also need to use the concept of molar volume, which is the volume occupied by one mole of a gas at a specific temperature and pressure.

First, we need to find the number of moles of gas that occupies 350.0L at standard pressure (1 atm) and temperature (273 K). This can be calculated using the formula n = PV/RT, where P = 1 atm, V = 350.0L, R = 0.08206 L atm/mol K, and T = 273 K. Substituting these values, we get n = (1 atm x 350.0L)/(0.08206 L atm/mol K x 273 K) = 14.15 mol.

Next, we need to find the molar volume of the gas at the pressure and volume we want it to occupy. Using the same formula, but with the new pressure (P') and volume (V') values, we get V' = nRT/P'. Since we want the gas to occupy 3.00L, we have V' = 3.00L. We also know that the number of moles (n) and temperature (T) are constant, so we can rearrange the formula to solve for the new pressure (P'). Thus, P' = nRT/V' = (14.15 mol x 0.08206 L atm/mol K x 273 K)/3.00L = 2,062.58 atm.

Therefore, the gas must be compressed to a pressure of 2,062.58 atm in order to occupy a volume of 3.00L, assuming constant temperature and number of moles. This is a very high pressure, and it highlights the importance of understanding the properties of gases and how they behave under different conditions.

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Answer:

118 elements have been discovered so far

Explanation:

According to the acronym be safe included in OSHA's Electrocution hazards handbook, an electrical hazard is a situation that occurs at work that exposes employees to the following risks are burns, the most frequent injury brought on by shock.

Electric shock and burns from contact with live components are the two primary risks of working with electricity. harm from arcing exposure, fire from improper electrical installations, or both

An electrical danger can be found before it poses a problem by inspecting tools and equipment before use. Regular inspections should be performed on all tools to look for fractures, frayed cord lines, damaged insulation, broken ground pins, and loose parts.

Thus, the Occupational Safety and Health Administration when describing the dangers that electricity may pose to construction workers.

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False. The two types of nucleic acids found in living organisms are DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). Ribose and deoxyribose are not nucleic acids; instead, they are sugar molecules that form the backbone of these nucleic acids.

In DNA, the sugar molecule is deoxyribose, while in RNA, it is ribose. Nucleic acids are composed of repeating units called nucleotides, which consist of a sugar molecule (ribose or deoxyribose), a phosphate group, and a nitrogenous base. DNA and RNA play essential roles in the storage and expression of genetic information within an organism, with DNA being the main genetic material and RNA serving as an intermediate in the production of proteins.

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In plants, the Calvin cycle and gluconeogenesis enzymes are most active under solution conditions with high pH and high [Mg2+]. So the correct option is d) high pH, high [Mg2+].

The optimal pH for the Calvin cycle enzymes in plants is generally slightly alkaline, ranging from pH 7.5 to 8.5, which is typically found in the stroma of chloroplasts. . Magnesium ions are required for the binding of substrates and stabilization of enzyme-substrate complexes in the Calvin cycle. Therefore, high pH and high concentrations of magnesium ions (Mg2+) would be favorable for the activity of Calvin cycle enzymes in plants. It's worth mentioning that the term "gluconeogenesis" is not typically used in the context of plants, as plants primarily undergo photosynthesis to synthesize glucose from carbon dioxide and water,

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Answer: the direction of decreasing temperature

Answer:

I don't know 100% but im pretty sure its electrons, if im wrong im really sorry let me know in the comments ill change it

explanation

the nucleus has more weight but its more compact but the electrons are spread apart circling the nucleus and therefor take up more space

Answer:

HCl is an acid and Cl- is its conjugate base

Explanation:

Acid is any specie which donates H+ and base is any specie which accepts H+.

Accoriding to Equation HCl ionises in water and give H+ hence it is an acid. Cl- has now ability to accept proton as it has negative charge therefore it is now base.

Answer:

298.15 Kelvin.

Explanation:

To convert Celsius to Kelvin, you need to add 273.15 to the Celsius temperature.

So, to convert 25 degrees Celsius to the Kelvin scale:

Kelvin = Celsius + 273.15

Kelvin = 25 + 273.15

Kelvin = 298.15

Therefore, 25 degrees Celsius is equivalent to 298.15 Kelvin.

Boyle's Law, which states that at constant temperature, a gas's pressure and volume are inversely related, can be used to address this issue.

Boyle's Law says that P1V1 = P2V2.

Where: P1 = The gas's initial pressure (in torr)

V1 is the container's initial volume (in millilitres).

P2 stands for the gas's post-volume change pressure (unknown).

V2 is the revised volume of the container (in millilitres).

Let's solve for P2 by entering the provided values into the equation:

P₁ = 757.2 torr

V2 = 132.5 mL V1 = 81.4 mL

P2 = ambiguous

P₁V₁ = P₂V₂

P2 equals 757.2 torr x 81.4 mL x 132.5 mL.

P2 times 132.5 mL = 61702.08 torr * mL

61702.08 torr = P₂ * 132.5

P2 = 132.5 mL / 61702.08 torr

P₂ ≈ 465.69 torr

as a result, the gas's pressure

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Answer:

When the partially positive end of one water molecule is attracted to the partially negative end of another water molecule

Explanation:

Water is made of \(H_{2} O\). The polar molecules H and O forms the hydrogen bond.

A hydrogen bond exists as an inter molecular force (IMF) that forms a certain kind of dipole-dipole attraction when a hydrogen atom bonded to a strongly electronegative atom lives in the vicinity of another electronegative atom with a lone pair of electrons. Inter molecular forces (IMFs) happen between molecules.

The  partial negative charge on  oxygen  attracts the positively charged H+  forming the hydrogen bonds. In the case of water, hydrogen bonds are  formed between the neighboring hydrogen and oxygen atoms of  the adjacent water molecules. This hydrogen bonds are responsible for the liquid state of water.

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The melting points of an impure sample is a) The two melting points are the same but the impure sample has a broader range.

Impure materials generally tend to have a barely decrease melting factor than the natural substance, and a broader melting temperature range. Pure materials may be diagnosed through evaluating the melting factor located withinside the test with posted reference records of what the melting factor need to be. Impurities, even if found in small amounts, commonly decrease the melting factor and expand the melting factor range. A huge melting factor range (extra than 5°C) commonly shows that the substance is impure; a slim melting factor range (O. 5-2°C) commonly shows that the substance within reason natural.

Thus, option a is the correct choice.

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Answer: \(I_{2} (l)\)

Explanation: Because C 6 H 6 is nonpolar substance and I 2 is also nonpolar compound

According to the concept of solubility,iodine  will form a solution when mixed with liquid benzene  as both are non-polar substances.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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Answer:

Well its actually the movement of tectonic plates under the earths surface that when the slide along each other, pull away from each other, or push up against each other they create earth quakes.

Explanation: yes.

BaSO₄ is safe to ingest because of its low solubility in water and limited release of Ba²⁺ ions. The sparing solubility of BaSO₄ ensures that only a minimal amount of Ba²⁺ ions are present, reducing the risk of toxicity. This property makes BaSO₄ an effective and safe contrast agent for obtaining X-ray images of the gastrointestinal tract.

BaSO₄ (barium sulfate) is safe to ingest because it has very low solubility in water, meaning it does not readily dissolve into Ba²⁺ ions in the gastrointestinal tract. This property is crucial for its use in medicine to obtain X-ray images of the gastrointestinal tract.

When BaSO₄ is ingested, it remains mostly undissolved as a solid in the gastrointestinal tract. Only a small fraction of BaSO₄ will dissolve, leading to the release of a negligible amount of Ba²⁺ ions into the surrounding solution. The concentration of Ba²⁺ ions in the gastrointestinal tract remains extremely low due to the limited solubility of BaSO₄.

The toxicity of barium arises primarily from the presence of Ba²⁺ ions in the body, which can interfere with various physiological processes. However, since BaSO₄ does not readily dissociate into Ba²⁺ ions, the amount of toxic Ba²⁺ ions released into the body from ingested BaSO₄ is extremely minimal. As a result, the risk of toxicity or harm from ingesting BaSO₄ is negligible.

The principle that governs the limited solubility of BaSO₄ is the common ion effect. The common ion effect states that the solubility of a sparingly soluble salt is decreased in the presence of a common ion, which in this case is the Ba²⁺ ion. When BaSO₄ is ingested, the presence of Ba²⁺ ions already in the body (such as from dissolved barium salts) further decreases the solubility of BaSO₄, making it even less likely to dissolve and release toxic Ba²⁺ ions.

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Answer:

26

Explanation:

answer on here fjchcjfjdnc.com

Answer: Sodium also floats on the surface, but enough heat is given off to melt the sodium (sodium has a lower melting point than lithium and the reaction produces heat faster) and it melts almost at once to form a small silvery ball that dashes around the surface.

Explanation:

Answer:

hydroxide.

Explanation:

Alkali metals are in group 1 of the Periodic Table. They are on the left of the Periodic Table. These are the alkali metals as follows:

When alkali metals react with water they make alkaline solutions, so the universal indicator turns people and they produce hydrogen and a metal hydroxide. When sodium is put in water, the metal floats on the surface it reacts to form sodium hydroxide and hydrogen.