What is the concentration of phosphate ions in a 2.5 M aqueous solution of phosphoric acid if the pH of the solution is 0.87 at 25 ºC?Ka1 = 7.5×10–3, Ka2 = 6.2×10–8, and Ka3 = 4.2×10–13.

Answer:

A.  6.0 mol H₂O

Explanation:

3 mol O₂ x  [tex]\frac{2 mol H2O}{1 mol O2}[/tex] = 6 mol H₂O

According to the mole concept , there are 184.8 grams in 4.62 moles of sodium hydroxide.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.Number of moles is given as, mass/ molar mass

∴mass=number of moles×molar mass

On substitution, mass= 4.62×40=184.8 g

Thus, there are 184.8 g in 4.62 mole of sodium hydroxide.

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(っ^-^  )っ Hey There!

Answer →  As light travels a certain distance, the intensity of the light will decrease by a square of the distance.

Why →  The farther away the light is the dimer it gets but the close light gets the bright it gets

✨Hope this Helps!✨

Answer:

Newton

Explanation:

A force is measured in terms of the acceleration it gives a standard mass. The SI unit of force in physics is named after the father of physics; Newton.

Answer:

8.05 x 10^25 atoms O

Explanation:

moles O = moles Al2(CO3)3 x (6 moles O/1 mol Al2(CO3)3) = 22.3 x 6 = 133.8 moles O

atoms O = moles O x Avogadro number = 133.8 x 6.02 x 10^23 = 8.05 x 10^25 atoms O

Answer:

The metals are on the bottom left in the periodic table, and the nonmetals are at the top right. The semimetals lie along a diagonal line separating the metals and nonmetals. The elements are arranged in a periodic table, which is probably the single most important learning aid in chemistry.

Explanation:

im not sure if there was supposed to options to that question or not

Based on Table F, the chemical compound which is least soluble in water is: 1. [tex]AlPO_4[/tex].

Solubility can be defined as a terminology that describes how readily a chemical substance or compound can be dissolved in a solvent to form a solution.

In Chemistry, a chemical substance or compound is said to be soluble if it dissolves completely in a solvent such as water.

Based on Table F, the chemical compound which is least soluble in water is [tex]AlPO_4[/tex] because phosphates are generally insoluble.

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Answer:

Explanation:

In any empirical formula problem you must first find the mass % of the elements in the compound. ...

Then change the % to grams. ...

Next, divide all the masses by their respective molar masses. ...

Pick the smallest answer of moles and divide all figures by that.

Since our answer for magnesium is not close enough to round to the nearest whole number we must choose a factor to multiply all the figures by that will yield us whole numbers

Lastly, the coefficients calculated in the previous step will become the subscripts in the chemical formula.

Answer:

[tex]\Large \boxed{\sf 0.714 \ moles}[/tex]

Explanation:

Avogadro's number can be used as a conversion factor from atoms to moles or moles to atoms.

[tex]\displaystyle \frac{4.3 \times 10^{23}}{6.022 \times 10^{23} } =0.714048[/tex]

Answer:

less

Explanation:

the more heat it has, the less a given heat will affect it

Answer:

more heat

Explanation:

Answer:

Li + HCl = LiCl + H2 - Chemical Equation Balancer.

Explanation:

Answer:I dont know about this one

Explanation:

Answer:  B) KCl

Explanation: Potassium chloride, KCl , is an ionic compound formed by the electrostatic force of attraction that holds the potassium cations and the chlorine anions together. Potassium, K , is located in group 1 of the Periodic Table.

Answer:

The three components of a chemical formula are the empirical formula, the molecular formula, and the structural formula.Hope this answer helps.

The given question is incomplete. The complete question is:

When 136 g of glycine are dissolved in 950 g of a certain mystery liquid X, the freezing point of the solution is 8.2C lower than the freezing point of pure X. On the other hand, when 136 g of sodium chloride are dissolved in the same mass of X, the freezing point of the solution is 20.0C lower than the freezing point of pure X. Calculate the van't Hoff factor for sodium chloride in X.

Answer: The vant hoff factor for sodium chloride in X is 1.9

Explanation:

Depression in freezing point is given by:

[tex]\Delta T_f=i\times K_f\times m[/tex]

[tex]\Delta T_f=T_f^0-T_f=8.2^0C[/tex] = Depression in freezing point

[tex]K_f[/tex] = freezing point constant

i = vant hoff factor = 1 ( for non electrolyte)

m= molality =[tex]\frac{136g\times 1000}{950g\times 75.07g/mol}=1.9[/tex]

[tex]8.2^0C=1\times K_f\times 1.9[/tex]

[tex]K_f=4.32^0C/m[/tex]

Now Depression in freezing point for sodium chloride is given by:

[tex]\Delta T_f=i\times K_f\times m[/tex]

[tex]\Delta T_f=20.0^0C[/tex] = Depression in freezing point

[tex]K_f[/tex] = freezing point constant  

m= molality = [tex]\frac{136g\times 1000}{950g\times 58.5g/mol}=2.45[/tex]

[tex]20.0^0C=i\times 4.32^0C\times 2.45[/tex]

[tex]i=1.9[/tex]

Thus vant hoff factor for sodium chloride in X is 1.9

Answer:

where is the question?

Explanation:

Answer:

hydrated ferric oxide is ferric hydoxide sol and is positively charged. When aqueous solution of NaCl is added to it,the Cl- ions neutralise the positive charge on the sol particles. In the absence of charge, brown precipitate is formes due to colloids can be coagulation of particles.Nov 11, 2020

Explanation: hope this help

Answer:

Electronegativity refers to the ability of an atom to attract shared electrons in a covalent bond. The higher the value of the electronegativity, the more strongly that element attracts the shared electrons.

Your welcome

Answer:

the total kinetic andd potential energies of all its particles

Explanation:

other brainly questions

Answer:

Hey mate....

Explanation:

This is ur answer....

The thermal energy of an object is the energy contained in the motion and vibration of its molecules. Thermal energy is measured through temperature. The energy contained in the small motions of the object's molecules can be broken up into a combination of microscopic kinetic energy and potential energy.

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Answer:

The volume is decreasing at a rate of 30 cm³/min.

Explanation:

From the question given above, pressure (P) and volume (V) are related by the following equation

PV = C

C => constant

If we make P the subject of the above, we shall have:

P = C/V

From the equation above (i.e P = C/V),

We can say that P is inversely proportional to V. This implies that as P is increasing, V will be decreasing and also, as P is decreasing, V will be increasing.

Considering the question given above, the pressure (P) is increasing at a rate of 30 kPa/min. Therefore, the volume will be decreasing at a rate of 30 cm³/min.

Answer:

a b c :]

Explanation:

Computers play a role in meteorology by equating to;

There options that best describe computers in Meteorology above are:

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Answer:

An atomic number of 94

Explanation:

Just took the practice

Answer:

An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions. Ionic bonds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. A covalent bond involves a pair of electrons being shared between atoms.

Answer:

Hi! An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions. Ionic bonds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. A covalent bond involves a pair of electrons being shared between atoms.

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Explanation:

Answer:Concentration of products can vary.

As more solute dissolves, more ions form; but the volume in which they are contained does not change.

Concentration of the solid phase does not change.

Explanation:

Answer:

A. bacteria

Explanation:

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Answer:

your answer is C

Explanation:

because when u make P1 the subject formula then P2 V2 will be divided with V1

ill answer if u answer this FAST

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The true statement about metamorphosis is the physical form of the young animal is completely different from the physical form of the adult.

Metamorphosis is the change in the structure of the animal in several stages until it changes into an adult form.

Animals that undergo metamorphosis are amphibians, insects, mollusk, crustaceans, fishes, etc.

The changes that occur in every stage are shape, nutrition form, behavior, etc.

The importance of metamorphosis is to change in every stage to reduce competition for food, predators, etc.

Thus, the correct option is D.

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Answer:

I think it would be B.

Explanation: