1. Use the formula Fe2(SO4)3, iron (III) sulfate, to answer the following:
a How many moles of oxygen are in one mole of iron (III) sulfate?
b. How many atoms of sulfur are in on formula unit of iron (III) sulfate?
c. How many iron atoms are in one mole of iron (III) sulfate?
d. What is the average mass in amu's of one formula unit of iron (III) sulfate?
e. What is the molecular mass of one mole of iron (III) sulfate?

Answer:

Compound: a substance that is made up of more than one type of atom bonded together. Mixture: a combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties.

Explanation:

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Answer:

Yellow seeds

Explanation:

Dominant traits are those that are inherited unchanged in a hybridization like the yellow seeds.

Answer:

yellow seeds

Explanation:

A number of radium isotopes are artificially created or are byproducts of artificial isotope decay. Many common products, including many that are used in construction, as well as soil, minerals, food, and groundwater all contain radium.

Thus, Drinking water in areas where wells are used can be a significant source of radium intake.

Commercial luminous paints for watch and instrument dials as well as for other luminescent objects have been made with radium. Additionally, internal radiation therapy has made use of it.

The comprehensive research of 224Ra, 226Ra, and 228Ra in experimental humans and animals serve as the main sources of knowledge regarding the health consequences and dosimetry of radium isotopes.

Thus, A number of radium isotopes are artificially created or are byproducts of artificial isotope decay. Many common products, including many that are used in construction, as well as soil, minerals, food, and groundwater all contain radium.

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The pH of the original solution was approximately 5.875.

The Henderson-Hasselbalch equation is given by:

pH = pKa + log([A-]/[HA])

First calculate the concentration of the weak acid after the addition of HCl:

Initial concentration of weak acid = 0.1 M

Volume of weak acid = 100 mL = 0.1 L

Moles of weak acid = concentration * volume = 0.1 M * 0.1 L = 0.01 moles

Concentration of HCl = 1 M

Volume of HCl = 6 mL = 0.006 L

Moles of HCl = concentration * volume = 1 M * 0.006 L = 0.006 moles

After the addition of HCl, the moles of the weak acid will be reduced by the moles of HCl:

Final moles of weak acid = initial moles of weak acid - moles of HCl = 0.01 moles - 0.006 moles = 0.004 moles

Volume of the final solution = initial volume of weak acid + volume of HCl = 100 mL + 6 mL = 106 mL = 0.106 L

The concentration of the weak acid in the final solution = final moles of weak acid/volume of final solution = 0.004 moles / 0.106 L = 0.0377 M

Now using the Henderson-Hasselbalch equation to calculate the pH of the original solution:

pH = pKa + log([A-]/[HA])

pH = 6.3 + log(0.0377/0.1)

pH = 6.3 + log(0.377)

pH = 6.3 + (-0.425)

pH ≈ 5.875

So, the pH of the original solution was approximately 5.875.

If a strong base was added instead of strong acid, the pH of the solution would increase. The strong base would react with the weak acid, forming the conjugate base of the weak acid and water. This would shift the equilibrium towards the conjugate base, resulting in an increase in pH.

To calculate the concentration of protons in the original weak acid buffer solution, you can use the equation:

[H+] = 10^(-pH)

[H+] = 10^(-5.875)

[H+] ≈ 1.3 x 10^(-6) M

To calculate the concentration of hydroxide ions in the original weak acid buffer solution, you use the equation:

[OH-] = Kw / [H+]

Kw is the ion product of water, which is equal to 1 x 10^(-14) at 298 K.

So,

[OH-] = (1 x 10^(-14)) / (1.3 x 10^(-6))

[OH-] ≈ 7.7 x 10^(-9) M

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Answer:

Sugar, sodium chloride, and hydrophilic proteins are all substances that dissolve in water. Oils, fats, and certain organic solvents do not dissolve in water because they are hydrophobic.

And, water is called the "universal solvent" because it dissolves more substances than any other liquid. ... Water molecules have a polar arrangement of the oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge.

I don't see any options so there i hope it helps .

Answer:

1 oxygen atoms

Explanation:

When barium combines with oxygen to form an ionic compound, it will only require just an oxygen atom.

An ionic compound is formed due to the electrostatic attraction between oppositely charged ions

A metal loses electrons to be gained by the non - metal and in the process they attract each other with a force.

 Barium has two valence electrons, to be stable, it loses the two;

 Oxygen has six valence electrons, to be stable it will gain two valence electrons to form an octet.

 So;

     One barium atom will successfully bind with One oxygen atom to form

               BaO

One factor that influences the absorbance of a sample is the concentration (c). The expectation would be that, as the concentration goes up, more radiation is absorbed and the absorbance goes up. Therefore, the absorbance is directly proportional to the concentration.

What is beer lamberts law ?

The third factor is known as molar absorbance (ε), where concentrations are given in moles/liter and path lengths are given in centimeters. Some research areas talk more about extinction coefficients. When spectroscopy is used to measure the concentration of a sample, a specific wavelength of radiation is selected to irradiate the sample. As you probably know from other experience, certain chemical species absorb certain wavelengths of radiation and not others. Molar absorptivity is a measure of how much a species absorbs at a particular wavelength of radiation to which it is exposed. The process of absorbing electromagnetic radiation involves the excitation of species from ground states to higher energy excited states. This process is called an excited transition, and excited transitions have probabilities of occurrence. It is appropriate to talk about the allowed range of possible energy transitions within a chemical species. Some migrations are more legal or cheaper than others. Very favorable or very acceptable transitions have high molar absorptivity. Only slightly favorable or slightly tolerant transitions have low molar absorptivities. The higher the molar extinction coefficient, the higher the absorption. Therefore, molar absorbance is directly proportional to absorbance.

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For the rusting of an iron bar, a chemical change occurs; while for the freezing of a substance , a physical change occurs.

When an iron bar rusts, a chemical change occurs. Rusting is a chemical reaction that involves the oxidation of iron in the presence of oxygen and water. The iron undergoes a chemical transformation and forms a new compound, iron oxide, which gives the rusty appearance. This change is irreversible and involves a rearrangement of atoms at the molecular level.

On the other hand, when a substance freezes, a physical change takes place. Freezing is a phase transition from a liquid to a solid state. During freezing, the substance undergoes a change in its physical state without any alteration in its chemical composition. The arrangement of molecules or atoms becomes more ordered as they transition from a disordered liquid state to a more structured solid state. This change is reversible, and the substance can return to its liquid state by melting.

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Answer:

can you take a bigger picture

Explanation:

The true statement among the following options is: The average rate of a reaction over a period of time can be expressed by dividing the concentration change of any reactant or product by the elapsed time.

The rate of reaction is the speed with which a reactant is consumed or a product is produced in a chemical reaction. It's typically expressed in units of concentration per time. The average rate of a reaction over a period of time can be expressed by dividing the concentration change of any reactant or product by the elapsed time. This is the true statement.

To determine the average rate of the reaction, one can use the formula as given below:

Average Rate of Reaction=Δ Concentration / Δ Time. Where,

Δ is the symbol for "change in." For example, if the concentration of a reactant decreases from 0.10 M to 0.05 M over the course of 10 seconds, the average rate of the reaction would be:-0.05 M / 10 s = -0.005 M/s.

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Answer:

it is a result of hydrogen bonds present within water molecules.

Explanation:

when the water is transformed to ice at zero degrees Celsius, the water molecules are in crystal lattice in a structure that has a lot of empty space around each molecule.

Answer:

4 electrons

Explanation:

the valence shell of carbon (for which n=2 ) thus contains 4 electrons.

Explanation:

Eating and digesting cheese pizza is a Chemical Change because it is an irreversible reaction. It can't be undone.

The theoretical yield of product is 0.210g.

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Answer:

60 Liters

Explanation:

The equation for this reaction is given as;

N2 + 3H2 → 2NH3  

From the reaction;

3 mol of H2 produces 2 mol of NH3

At STP;

1 mol = 22.4 L

This means

67.2 L ( 3 * 22.4) of H2 produces 44.8 L ( 2 * 22.4) of NH3

How many L of H2 would produce 40 L of NH3

67.2 = 44.8

x = 40

Solving for x;

x = 40 * 67.2 / 44.8

x = 60 L

Answer:

7 no ans is C

8 no ans use of magnet .I am not sure

Answer:

Oxygen is the limiting reagent.

Explanation:

First you must make a chemical equation. Then you will do a mole bridge from the moles of each given substance to a product, you can find how much product each will create. The reactant that creates the least is the limiting reagent. I hope this helps!

If we label the reactions 1 - 3 in order as they appear in the image attached.

Reaction 1 - The yield is increased by decreasing the volume

Reaction 2 - The yield is increased by decreasing the volume

Reaction 3 - The yield is increased by increasing the volume

We know that when a constraint is imposed on a reaction system that is in equilibrium, it is usual that the equilibrium position of the system would shift. The reason why the equilibrium position would shift is so that the constraint that is on the system can be annulled and then a new position of equilibrium would become established.

We would now look at the reactions. We know that when we increase the volume of the reaction, the equilibrium position would shift to the direction in which the volume is lesser. Similarly, if the volume is decreased, the direction to which the equilibrium position would shift would be that of a higher volume.

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Answer:

region 2 and region 3

Explanation:

you can tell by the color of the land my friends^^

Answer:

2, 3 They are closest to the equator, and the equator marks to hottest places on earth.

Explanation:

I hope this helps you.

Answer:

4.70 grams of NH4Cl is needed to prepare 350 mL of a 0.25 M ammonium chloride solution.

We need approximately 4.68 grams of NH4Cl to prepare a 0.25 M ammonium chloride solution with a volume of 350 mL.

To determine the mass of NH4Cl needed to prepare the solution, we us use the formula:

m=M x V x MM ... (i)

where,

m= mass in grams

M=molarity of solution

MM= molar mass of compound

V= volume in litres

The number of moles of NH4Cl needed can be calculated using:

  Moles = Molarity x Volume ...(ii)

  Moles = 0.25 mol/L x 0.350 L

  Moles = 0.0875 mol

Hence we can replace M x V with number of moles in equation i.

The molar mass of NH4Cl is :

  Molar mass of NH4Cl = (1 x 14.01 g/mol) + (4 x 1.01 g/mol) + (1 x 35.45 g/mol)

  Molar mass of NH4Cl = 53.49 g/mol

We have all the variables

Putting them in equation i.

Hence,

  Mass (g) = Moles x Molar mass

  Mass (g) = 0.0875 mol x 53.49 g/mol

  Mass (g) = 4.68 g

Therefore, you would need approximately 4.68 grams of NH4Cl to prepare a 0.25 M ammonium chloride solution with a volume of 350 mL.

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Answer:

6626 g

Explanation:

Given that:

Density of water = 1.00 g/ml, volume of water = 42800 ml.

Since density = mass/ volume

mass of water = volume of water * density of water = 42800 ml * 1 g/ml = 42800 g

Initial temperature of water = 22°C and final temperature of water = 45°C.

specific heat capacity for water = 4.184 J/g°C

ΔT water = 45 - 22 = 23°C

For iron:

mass = m,  

specific heat capacity for iron  = 0.444 J/g°C

Initial temperature of iron = 1445°C and final temperature of water = 45°C.

ΔT iron = 45 - 1445 = -1400°C

Quantity of heat (Q) to raised the temperature of a body is given as:

Q = mCΔT

The quantity of heat required to raise the temperature of water is equal to the temperature loss by the iron.

Q water (gain) + Q iron (loss) = 0

Q water = - Q iron

42800 g ×  4.184 J/g°C × 23°C = -m × 0.444 J/g°C × -1400°C

m = 4118729.6/621.6

m = 6626 g

A): The closest orbital to the nucleus, called the 1s orbital, can hold up to two electrons. This orbital is equivalent to the innermost electron shell of the Bohr model of the atom. It is called the 1s orbital because it is spherical around the nucleus. The 1s orbital is always filled before any other orbital.

The mass percent of the sodium fluoride solution is approximately 29.8%.

Given:

Moles of sodium fluoride (NaF) = 0.64 mol

Mass of water (\(H_2O\)) = 63.5 g

To find the mass of sodium fluoride, we can use its molar mass, which is 41.99 g/mol (sodium = 22.99 g/mol, fluorine = 18.99 g/mol):

Mass of NaF = Moles of NaF * Molar mass of NaF

\(= 0.64 mol * 41.99 g/mol \\= 26.91 g\)

The total mass of the solution is the sum of the mass of sodium fluoride and the mass of water:

The total mass of solution = Mass of NaF + Mass of \(H_2O\)

\(= 26.91 g + 63.5 g \\= 90.41 g\)

Now we can calculate the mass percent:

Mass percent = (Mass of NaF / Total mass of solution) * 100

\(= (26.91 g / 90.41 g) * 100 \\= 29.8%\)

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It's important to note that these statements represent general characteristics of ion channels, but specific types of ion channels may exhibit unique properties and behaviors.

The present several statements regarding ion channels in cellular membranes and indicate whether they are true or false along with explanations:

Ion channels are selective in the ions they allow to pass through.

Ion channels require energy in the form of ATP to function.

Ion channels can open and close in response to various stimuli.

Ion channels are only found in the plasma membrane.

All ion channels allow ions to move across the membrane in both directions.

Ion channels play a crucial role in electrical signaling and nerve impulse transmission.

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Answer:

the Germany scientist Alfred Wagner describes fold mountains that are found in The world are the same also geological similarity that occur between this continent are the same for example the rock that are found in brazil are the same of that of south africa.

Answer:

ffff

Explanation:

Answer:

The higher the temperature, the faster the particles move, the lower the temperature, the slower.

All three elements  in the periodic table will for sure have characteristic of mass and volume.

An element  is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom which is characteristic of it's own. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

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