What does the enthalpy change of solution value tells us about the solubility of the compound?

When both parents shared different traits either it will be heterogeneous or homogenous traits,in that case offspring traits neither belongs to parents.However,chances are very that traits of children neither belongs to parents.

Unaffected parents can create impacted offsprings assuming that the two guardians are transporters (heterozygous) for the attribute being followed in the family. Latent traits are normally not communicated in each age. Finally, guys and females are similarly prone to communicate a latently acquired characteristic.

In the event that the latent characteristic is more than prevailing, the recessive traits will really become predominant and the predominant attribute will become recessive.Recessive alleles are meant by a lowercase letter (a versus A). Just people with an aa genotype will communicate a latent characteristic; consequently, posterity should get one passive allele from each parent to display a latent traits.

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Answer: Exploratorium Senior Scientist Paul Doherty explains why not—the orbit of the moon is tilted relative to the orbit of the Earth around the sun, so the moon often passes below or above Earth. At those times, it does not cross the line between the sun and the Earth, and therefore does not create a solar eclipse.

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Answer:

if my calculation are correct, it's 295 grams

Explanation:

because liters converted to grams is .1=100 so if you take 2.95 times 100, it equals 295

The light emitted by an element when its electrons return to a lower energy state can be viewed as a bright line emission spectrum.

The distribution of electromagnetic radiation released by a substance whose atoms have been excited by heat or radiation.

A spectroscope can be used to determine which frequencies have been emitted by a substance.

An emission line will appear in a spectrum if the source emits specific wavelengths of radiation.

This emission occurs when an atom, element or molecule in an excited state returns to a configuration of lower energy.

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Answer:

By not playing with sharp objects.

By not running on a slippery floor.

By not jumping on the desks and benches.

Explanation:

Hang safety posters in common areas such as the lunchroom, and office, near the restrooms and in the front hallway. Implement safety training for all students. Ask teachers to conduct classroom safety training based on the rules.

Answer:

a. KCl

Explanation:

a. KCl - made of 2 elements

b. NH4Cl

c. KClO3

d. NH4ClO3

C. Walking on wet floors shows that Friction is undesirable

Answer:

Blank 1 - Microscope

Blank 2 - Cell Theory

Explanation:

Answer:

microscope. and cell theory

Explanation:

with the invention of the microscope. scientists were able to create cell theory

Answer: An insulator would be made out of material unable to conduct electricity due to lack of fluid movement for electrons, such as rubber. Rubber properties not only prevents them from freely moving, but also helps electrons stay tightly bound to each other.

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In living organisms, glucose is the most fundamental kind of fuel. It is soluble in multicellular organisms and is carried by bodily fluids to all cells, where it is digested to release energy.

Organic compounds in chemistry are any chemical compounds that have carbon-hydrogen or carbon-carbon bonds. Millions of organic compounds have been identified as a result of carbon's capacity to catenate. Any of a wide range of chemical compounds in which one or more carbon atoms are covalently connected to atoms of other elements, most typically hydrogen, oxygen, or nitrogen. Carbides, carbonates, and cyanides are among the few carbon-containing chemicals that are not categorized as organic. Because of their relationship with animals and because they include carbon, the chemical components of living things are known as organic substances. Organic chemistry is concerned with organic chemicals, which are substances related with living activities.

Here,

Glucose is the most basic type of fuel in living creatures. It is soluble in multicellular organisms and is transported to all cells via body fluids, where it is digested to release energy.

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Answer:

Thomson's results showed that atoms contain smaller particles, so Dalton's theory had to be modified. Rutherford's results showed that most of an atom is empty space and that the mass is concentrated in the center of the atom.

Explanation:

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Answer:

Remains the same

Explanation:

I just got it right on Acellus!

Considering the Dalton's partial pressure, the partial pressure of nitrogen and oxygen is 3.634 atm and 0.966 atm  respectively.

The pressure exerted by a particular gas in a mixture is known as its partial pressure.

So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:

\(P_{T} =P_{1} +P_{2} +...+P_{n}\)

where n is the amount of gases.

Dalton's partial pressure law can also be expressed in terms of the mole fraction of the gas in the mixture.

The mole fraction is a dimensionless quantity that expresses the ratio of the number of moles of a component to the number of moles of all the components present:

\(x_{A} =\frac{n_{A} }{n_{total} }\)

So in a mixture of two or more gases, the partial pressure of gas A can be expressed as:

\(P_{A} =x_{A} P_{T}\)

In this case, the mixture contains 5.4 mol of nitrogen and 1.4 mol of oxygen. So, the total number of moles of all the components present is 5.4 moles + 1.4 moles=  6.8 moles.

Then, the mole fraction of each gas can be calculated as:

So, being 4.6 atm the total pressure of the gas mixture, the partial pressure of each gas can be calculated as:

\(P_{nitrogen} =x_{nitrogen} P_{T}\)= 0.79× 4.6 atm= 3.634 atm

\(P_{oxygen} =x_{oxygen} P_{T}\)= 0.21× 4.6 atm= 0.966 atm

In summary, the partial pressure of nitrogen and oxygen is 3.634 atm and 0.966 atm  respectively.

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To make up 1 L of a 0.5 M solution of EDTA starting with the free acid, the pH must be adjusted to 7.0. EDTA is a weak acid with a pKa of 2.0, 2.67, 6.16, and 10.26 for the four acetic acid groups.

At a pH of 7.0, EDTA will exist in a buffered state, meaning that it will be partially protonated and partially deprotonated.

To adjust the pH of the EDTA solution to 7.0, an alkali solution such as 10 M NaOH must be added. The amount of NaOH required can be calculated using the Henderson-Hasselbalch equation:

pH = pK a + log([base]/[acid])

where [base] is the concentration of the deprotonated form of EDTA and [acid] is the concentration of the protonated form of EDTA.

At a pH of 7.0, the acid-base equilibrium of EDTA will be:

[EDTA-] = [HEDTA]

At this pH, the buffer capacity is high. Since the pKa of EDTA is close to the desired pH, the buffer will resist changes in pH caused by added acids or bases.

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The product is dried using anhydrous sodium sulfate by using the intermolecular forces of adsorption. Ion-dipole interactions are the intermolecular forces that make salt water (brine) more effective in removing water from an organic layer than pure water alone. Le Chatelier's principle is the term used to describe the occurrence of upsetting an equilibrium and causing it to rebalance.

The product is dried using anhydrous sodium sulfate by using the intermolecular forces of adsorption. Since sodium sulfate has a high affinity for water molecules, it is very hygroscopic. By hydrogen attaching the water molecules to its surface, it may efficiently absorb water from the product.

Ion-dipole interactions are the intermolecular forces that make salt water (brine) more effective in removing water from an organic layer than pure water alone. Sodium ions (Na⁺) and chloride ions (Cl⁻) are formed when salt (sodium chloride) dissolves in water. The solubility of water in the brine can be improved by these ions' ability to create ion-dipole interactions with the polar water molecules. The dissolved ions make the solution more polar, which improves its ability to draw water out of the organic layer.

Le Chatelier's principle is the term used to describe the occurrence of upsetting an equilibrium and causing it to rebalance. According to Le Chatelier's principle, if a system that is in equilibrium is subjected to a change in circumstances like concentration, temperature, or pressure, the system will move in a way that helps re-establish equilibrium by counteracting the imposed change. The system shifts in the direction that produces more of the alkene product to restore equilibrium in the scenario provided when the alkene product is physically removed from the equilibrium mixture.

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A spontaneous reaction is one in which the change in free energy is negative and the standard cell potential is positive.

For a redox reaction to be spontaneous, the electrode potential of the cell must be positive and this depends on the relative electrode potentials of the species involved in the reaction. A metal can not displace a metal above it in the electrochemical series from solution.

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There are approximately 2.21 × 10²² oxygen atoms present in 2.00 g of troegerite.

To find the number of oxygen atoms in 2.00 g of troegerite, we need to calculate the number of moles of troegerite, and then use the mole ratio between oxygen atoms and uranium atoms.

First, we calculate the molar mass of troegerite:

Molar mass of (UO₂)₃(AsO₄)₂·12H₂O =

[3 × (238.03 g/mol) (molar mass of uranium) + 2 × (141.94 g/mol) (molar mass of arsenic) + 12 × (18.02 g/mol) (molar mass of water) + 16 × (15.99 g/mol) (molar mass of oxygen)] =

746.95 g/mol.

Next, we calculate the number of moles of troegerite in 2.00 g:

Number of moles = mass / molar mass = 2.00 g / 746.95 g/mol = 0.00268 mol.

Since the formula (UO₂)₃(AsO₄)2·12₂O contains 16 oxygen atoms, the mole ratio between uranium atoms and oxygen atoms is 1:16.

Therefore, the number of oxygen atoms in 2.00 g of troegerite can be calculated as follows:

Number of oxygen atoms = 1.38 × 10²¹ uranium atoms × (16 oxygen atoms / 1 uranium atom) = 2.21 × 10²² oxygen atoms.

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Answer:

Atomic particles

Explanation:

A scanning tunneling microscope is an instrument used to view any surfaces at the levels of an atom. It was invented in the nineteenth century.

Answer:

The answer is allotropes

Explanation:

As known by studying and research the ansqer came out to be allotropes

The correct answer is option c. 10.48. To calculate the pH of a solution of NaBO2, we need to first identify the relevant chemical reaction. NaBO2 is a salt of a weak base (BO2-) and a strong acid (Na+). When it dissolves in water, it undergoes hydrolysis, meaning it reacts with water to form its conjugate acid and base:

NaBO2 + H2O ⇌ BO2- + Na+ + H2O
The equilibrium constant for this reaction is called the base dissociation constant (Kb). To find the pH of the solution, we need to use the Kb value of BO2- and the concentration of NaBO2 to calculate the concentration of OH- ions in the solution. The Kb value of BO2- is 5.6 x 10^-10. Using the concentration of NaBO2 (0.10 M), we can calculate the concentration of BO2- in the solution. Since NaBO2 is a strong electrolyte, it completely dissociates into its ions, so the concentration of Na+ can be ignored in this case: [BO2-] = [OH-] = Kb * [NaBO2] / [H2O]
Substituting the values, we get: [BO2-] = [OH-] = 5.6 x 10^-10 * 0.10 / 1.0 = 5.6 x 10^-11 M
Now, to find the pH, we need to calculate the pOH first:
pOH = -log[OH-] = -log(5.6 x 10^-11) = 10.25
pH + pOH = 14 (at 25°C)
pH = 14 - 10.25 = 3.75

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Explanation:

STP= 0 degrees

1atm or 101.3 kpa

\(pv = nrt\)

P=101.3 kpa

v=?

n=mass/molar mass of co2=56/44.01

r=8.314

T=-273 K

\(101.3 \times v = \frac{56}{44.01} \times 8.314 \times 273 \)

\(v = 28.5l\)

a) The cell potential at 25 degrees Celsius under standard conditions for the given redox reaction is 0.0 V.

b) The cell potential at 25 degrees Celsius with [Sn2+] = 0.0100 M and [Mn2+] = 2.00 M is -0.059 V.

c) The cell potential at 25 degrees Celsius with [Sn2+] = 2.00 M and [Mn2+] = 0.0100 M is 0.059 V.

The cell potential of a voltaic cell can be calculated using the Nernst equation:

Ecell = E°cell - (RT/nF) * ln(Q)

Where:

Ecell is the cell potential

E°cell is the standard cell potential

R is the gas constant (8.314 J/(mol·K))

T is the temperature in Kelvin

n is the number of electrons transferred in the balanced redox equation

F is the Faraday constant (96,485 C/mol)

ln is the natural logarithm

Q is the reaction quotient

a) In standard conditions, the concentrations of all species are 1 M and the cell potential is 0.0 V. This means that the reaction is at equilibrium and there is no net flow of electrons.

b) In this case, [Sn2+] = 0.0100 M and [Mn2+] = 2.00 M. Plugging these values into the Nernst equation, we can calculate the cell potential to be -0.059 V. The negative value indicates that the reaction is not at equilibrium and proceeds spontaneously in the forward direction.

c) Here, [Sn2+] = 2.00 M and [Mn2+] = 0.0100 M. By substituting these concentrations into the Nernst equation, we find the cell potential to be 0.059 V. The positive value indicates that the reaction is not at equilibrium and proceeds spontaneously in the reverse direction.

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Oyster populations are primarily, if not exclusively, composed of Adults (option B.).

Oysters are found in coastal areas that are either salty or brackish, and they tend to congregate on older shells, rocks, piers, or any other submerged surface that is hard. They eventually build rock-like reefs by fusing together as they grow, which provides a habitat for a variety of other marine animals and plants.

The word "oyster" refers to a number of different families of bivalve mollusks that live in marine or brackish environments and are known together by the name "oyster." In other species, the valves are extremely calcified, and the shape of several of them is rather asymmetrical. The superfamily Ostreoidea contains a significant number of oysters, although not all of them.

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Answer: oh i thought i knew it nvm im sorry love

Explanation:

A, the total number of valence electron is 24 for Silicon Tetrachloride , SiCl₄ .

In Lewis Dot structure S=N-A is used to calculate the total number of shared and unshared electrons in a molecule.

S is the number of shared electrons ,N is the number of total valence shell electrons required by all the atom of the molecule, A is the total number of valence electrons available from all the atoms in the molecule

For SiCl₄,

• We have to first count the valence electron on each atom that is coming to form a molecule .

Valence electron on Si = 4

Valence Electron on Cl = 7

Total valence electron on SiCl₄ = 4+ 4 * 7 = 32

• Then we find the least electronegative atom in the molecule and place it at the center , In SiCl₄ , Si has 1.8 and Cl has 3.16 and so Si is placed at the center and four Cl atoms are connected with a single bond

• A single bond takes up 2 valence electron and so for four bonds 8 valence electrons have been occupied , so we are left with 32-8=24 valence electrons.

Therefore In the Lewis Dot structure S=N-A , Total number of valence electrons available from all the atoms in molecule of SiCl₄ is 24.

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Answer: Love is when you feel like you can touch the sky when your around that person, when your at your best self or that person and when you put their needs before yours because your needs just don't matter. When you feel like you can't stop thinking about that person or you can stop smiling when you think of them. Its when you feel this warm, safe feeling when your around them. And if you really love them then my answer should be true for you.

Explanation:

because iv'e felt and have been in love before....

Answer:

Love is an intense, deep affection for another person. Love also means to feel this intense affection for someone. Love can also refer to a strong like for something or to like something a lot. Love has many other senses both as a verb and a noun

Answer:

The correct answer is -

Independent Variable:​ change of speed​ ​

Dependent Variable:​ time takes to stop​ ​

Controlled Variables:​ stop at a stop sign

Explanation:

To know the effect of the speed to take the time to stop at a stop sign Bobbye perform this exercise where he changes the speed at each time that he is driving to know the time it takes to stop at a stop sign. There is a change that takes place purposely is in the speed of driving so it is an independent variable as the independent variable is a variable that is manipulated in an experiment or investigation.

The time it takes to stop is the factor that depends on the speed so it is the dependent variable as the dependent variable is the variable that depends on the independent variable.

The control variable remains the same or constant in an investigation which is stoping at a stop time irrespective of speed.  

Answer:

26.981539

Explanation:

Answer:

2

Explanation:

The helium atom has 2 protons, 2 electrons and 2 neutrons. So the atomic number is 2.

The number of atoms of any element in the given chemical formula is the number that is written on the foot of the symbol of that element.  The atomic number of  helium atom is 2.

Atom is the smallest particle of any matter. Atom combines to form element and element combine to form molecule or compound.

Atom consists of electron, proton and neutron. The total mass of atom is inside the nucleus. Inside the nucleus proton and neutron is there. So calculate mass of an atom, total mass of all protons is added to the total mass of neutron. Electrons revolve around the nucleus.

For a given atom

Number of proton= number of electrons = number of neutrons

number of protons =2

number of electrons =2

number of neutrons =2

So atomic number will be 2

Therefore, the atomic number of  helium atom is 2.

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To produce a 0.40 M solution of KCl from a 0.15 M solution, you must add 1.53 grams of KCl.

To solve this problem, you need to use the formula for dilution, which is:

M1V1 = M2V2

where M1 and V1 represent the concentration and volume of the starting solution, and M2 and V2 represent the concentration and volume of the final solution.

Plugging in the values from the problem, we have:

M1 = 0.15 M

V1 = 500 mL

M2 = 0.40 M

V2 = ?

Solving for V2, we get:

V2 = M1V1 / M2 = (0.15 M)(500 mL) / (0.40 M) = 375 mL

Since 1 mL of water has a mass of 1 gram, you can use the volume of the final solution to calculate the mass of KCl you need to add:

Mass of KCl = (375 mL)(1 g/mL) = 375 g

Therefore, you need to add 1.53 grams of KCl to 500 mL of a 0.15 M KCl solution to produce a 0.40 M solution.

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Answer: the answer is a

Explanation:

you should always keep lab coat on when in lab

Answer:

its  A. chemistry labs have a lot of things that can hurt you, even with just a few drops . its one of the most dangerous experiment types you do in science. even if your not doing an experiment  but your in the room you should have on protection in case of a spill or something.  it is always impotent  to have safety  gear on. even more so in chemistry