what happens when equal volumes of 2×10–4 m aqueous solutions of calcium nitrate, ca(no3)2, and sodium fluoride, naf, are combined? the ksp of calcium fluoride, caf2, is 4.0×10–11.

The correct formula for calcium phosphate is B) \(Ca_{3}(PO_{4})_{2}\).

The formula for calcium phosphate is \(Ca_{3}(PO_{4})_{2}\). Calcium phosphate is an ionic compound that consists of calcium cations (\(Ca^{2+}\)) and phosphate anions (\(PO_{4}^{3-}\)). The compound has a 3:2 ratio of calcium ions to phosphate ions. Therefore, the correct formula for calcium phosphate is \(Ca_{3}(PO_{4})_{2}\), where there are three calcium ions and two phosphate ions.

It is a white, crystalline powder that is odorless and tasteless. Calcium phosphate is the main mineral component of bones and teeth in animals, and it also plays an important role in many biological processes, including the regulation of enzyme activity and the formation of cell membranes.

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Answer:

The change from a liquid phase to a gaseous phase.

so the answer would be it changed to a gaseous phase

---------------

This is what occurs when the vapor pressure of the liquid is equal to the atmospheric pressure exerted on the liquid.

The number of moles of gas is the same on both sides, the change in volume will not affect the equilibrium position of the reaction. The answer is B) There is no change because there are the same number of moles of gas on both sides.

To determine the change that will occur when the container is shrunk from 9.0 L to 3.0 L for the given reaction:

51.8 kJ + H₂(g) + I₂(g) → 2HI(g)

We need to consider the number of moles of gas on each side of the reaction.

On the left side, there are 2 moles of gas (H₂ and I₂), while on the right side, there are 2 moles of gas (2HI). Both sides have an equal number of moles of gas.

Therefore, the correct answer is B) There is no change because there are the same number of moles of gas on both sides.

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The best description of the result of the addition of a small amount of solid NaNO2 to a solution of HNO2 is that it will increase the concentration of NO2- ions, thereby increasing the pH of the solution.

This is because NaNO2 will dissociate into Na+ and NO2- ions in the solution, and the NO2- ions will react with HNO2 to form more HNO3 and NO. The increase in NO2- ions will lead to a shift in the equilibrium of the reaction, ultimately increasing the pH of the solution.

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Answer:

the answer is b. 2

hope it helps

If we need 18.9 grams of HCl for a reaction, and we have a 1.5 M solution of HCl, the mL of this solution should we use is 345.3 mL.

Given that :

mass of the HCl =  18.9 grams.

molar mass of the HCl = 36.45 g/mol

moles of the HCl = mass / molar mass

                             = 18.9 / 36.45

                             = 0.518 mol

the molarity of the HCl = 1.5 M

The molarity is given as:

molarity = moles / volumes

volume in L = moles / molarity

                    = 0.518 / 1.5

                    = 0.3453 L

                    = 345.3 mL

Thus, the volume is 345.3 mL.

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Answer:

matter is conserved because atoms are conserved in physical and chemical process

Explanation:

energy takes different forms. the transfer of energy drives the motion of matter.

The percent yield of the reaction is 64.0%. This means that out of a theoretical yield of 183.0 g of product, the reaction actually produced 118 g of product, for a yield of 64.0%.

To calculate the percent yield of a reaction, you need to know the actual yield of the product and the theoretical yield of the product. The actual yield is the amount of product that is actually produced in the reaction, and the theoretical yield is the amount of product that would be produced if the reaction proceeded perfectly, with no loss of reactants or products.

In this case, the actual yield of the product is 118 g of HCl and aqueous phosphorous acid (H3PO3), and the theoretical yield can be calculated using the balanced chemical equation for the reaction.

The balanced chemical equation for the reaction of phosphorus trichloride with water to form HCl and aqueous phosphorous acid is:

3 PCl3 + 6 H2O -> 3 HCl + H3PO3

From this equation, we can see that for every 3 moles of PCl3 that react, 3 moles of HCl and 1 mole of H3PO3 are produced.

percent yield = (118 g / 183.0 g) × 100% = 64.0%

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The overall heat transfer coefficient, U, is the sum of the individual heat transfer coefficients on the inner and outer surfaces of the pipe. To find U, we need to calculate the individual heat transfer coefficients and then sum them.

First, let's calculate the individual heat transfer coefficient on the inner surface of the pipe. We can use the convective heat transfer coefficient formula:

h_inner = 5680 W/m^2 K

Next, let's calculate the individual heat transfer coefficient on the outer surface of the pipe. Again, we can use the convective heat transfer coefficient formula:

h_outer = 22.7 W/m^2 K

Now, let's find the overall heat transfer coefficient, U:

U = (1 / h_inner + 1 / h_outer)^-1

Substituting the values we have:

U = (1 / 5680 + 1 / 22.7)^-1

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The modern periodic law states that the physical and chemical properties of the elements are periodic functions of their atomic numbers. The elements are arranged in the increasing order of their atomic numbers.

Here the element Lithium is a alkali metal which is located in the group 1 of the periodic table and placed in the second period. Its atomic number is 3. Alkali metals are highly electropositive and are good reducing agents.

Lithium reacts with the elements of groups 16 and 17 and form compounds, they also burn in oxygen and react with water.

The reaction of lithium with water is:

2Li + 2H₂O → 2LiOH + H₂

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\(\huge \boxed{\sf C}\)

Conduction: Heat transfers into hands when holding a hot cup of coffee. Heat energy is transferred between or inside substances by conduction. We can use any media for conduction, but physical media is required.

The kind of thermal energy transfer that warms your hand when you hold a hot mug of tea is called conduction. The correct option is C.

Direct contact between molecules inside a substance allows for the transfer of energy, typically in the form of heat and/or electricity. Conduction can occur in gases, liquids, and solids.

Conduction heat transfer primarily takes place in stationary mediums, including solids or fluids that are at rest.

When holding a hot cup of coffee, heat is transferred to the hands. Conduction is the method of transferring heat energy inside or between materials. Any medium can be used for conduction, although physical mediums are necessary.

Therefore, the correct option is C. Conduction is correct for the process mentioned above.

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Answer:

Gas Pressure

Explanation:

Gas pressure is caused by the force exerted by gas molecules colliding with the surfaces of objects (Figure 5.2. 1). Although the force of each collision is very small, any surface of appreciable area experiences a large number of collisions in a short time, which can result in a high pressure.

Answer:

Collisions

Explanation:

It says that it was the answer.

Sodium is a reactant in the chemical reaction.

The chemical equation is: 2Na + Cl2 -> 2NaCl, where Na represents sodium, Cl2 represents chlorine, and NaCl represents sodium chloride.

Sodium is a reactant in the chemical reaction, meaning it is one of the substances that react to form a new substance.

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Answer:

Explanation:

To solve this problem, we can use the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

At STP (standard temperature and pressure), the temperature is 0°C or 273.15 K, and the pressure is 1 atm or 101.325 kPa.

We can use the ideal gas law to find the number of moles of chlorine gas in the sample:

n = PV/RT

where P is the pressure, V is the volume, R is the gas constant, and T is the temperature in Kelvin.

First, we need to convert the given temperature of 25.2°C to Kelvin:

T = 25.2°C + 273.15 = 298.35 K

Now we can calculate the number of moles of chlorine gas in the sample:

n = (100.8 kPa)(353.2 mL)/(8.314 J/K/mol)(298.35 K)

n = 0.0158 mol

Next, we can use the number of moles and the ideal gas law to find the volume at STP:

V = nRT/P

V = (0.0158 mol)(8.314 J/K/mol)(273.15 K)/(101.325 kPa)

V = 0.364 L or 364 mL

Therefore, the volume of the chlorine gas at STP would be 364 mL.

The main answer to your question is: ΔGo > 0 indicates if a reaction will proceed in reverse at any given conditions.

ΔGo (the change in Gibbs free energy) is a measure of spontaneity of a reaction.

If ΔGo is positive, it means that the reaction is not spontaneous and requires energy input to occur.

In this case, the reaction will tend to proceed in the reverse direction in order to minimize the free energy of the system.

Therefore, if ΔGo > 0, the reaction will proceed in reverse at any given conditions.

Summary: ΔGo > 0 indicates that a reaction will proceed in reverse at any given conditions.

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Explanation:

you are to see cells By doing an experiment.

The limiting reactant refers to the reactant that is in small amount. The extent of the reaction depends on the amount of the limiting reactant.

The term limiting reactant refers to the reactant that is in small amount, We shall now solve the questions individually.

1) The reaction equation is;

CaO + H2O → Ca(OH)2

Number of moles of CaO = 10 g/56 g/mol = 0.18 moles

Number of moles of H2O = 10 g/18 g/mol = 0.56

Since the reaction is 1:1, CaO is the limiting reactant

Mass of calcium hydroxide = 0.18 moles * 74 g/mol = 13.32 g

2) The reaction equation is;

Mg + Br2 → MgBr2

Number of moles of Mg = 1 g/24 g/mol = 0.042 moles

Number of moles of Br2= 5 g/160 g/mol = 0.031 moles

Since the reaction is 1:1, Br2 is the limiting reactant

Mass of MgBr2 =  0.031 moles * 184 g/mol = 5.7 g

3) The reaction equation is;

CuO + H2 → Cu + H2O

Number of moles of CuO= 2.00 g/80 g/mol = 0.025 moles

Number of moles of H2 = 1.00g/2 g/mol = 0.5 moles

Since the reaction is 1:1, CuO is the limiting reactant

Mass of Cu = 0.025 moles * 63.5 g/mol = 1.59 g

4) The reaction equation is;

2Na + F2 → 2NaF

Number of moles of Na = 2.30 g/23 g/mol = 0.10 moles

Number of moles of F2 =  2.85 g/38 g/mol = 0.075 moles

If 2 moles of Na react with 1 mole of F2

x moles of  Na reacts with 0.075 moles of F2

x = 0.15

Hence Na is the limiting reactant

Mass of NaF = 0.10 moles * 42 g/mol = 4.2 g

5) The equation of the reaction is;

Fe2O3 + 2Al → 2Fe + Al2O3

Number of moles of Fe2O3  =  8.00 g/160 g/mol = 0.05 moles

Number of moles of Al = 2.16 g/27 g/mol = 0.08 moles

If 1 mole of Fe2O3  reacts with 2 mole of Al

x moles of Fe2O3 reacts with 0.08 moles of Al

x = 0.04 moles

Hence, Fe2O3 is the limiting reactant

1 mole of Fe2O3  yileds 2 moles of Fe

0.05 moles yileds 0.05 moles  * 2 moles/1 mole = 0.1 moles

Mass of Fe = 0.1 moles * 56 g/mol = 5.6 g

6) The equation of the reaction is;

2Al + 3Cl2 → 2AlCl3

Number of moles of Al = 13.5 g/27 g/mol = 0.5 moles

Num ber of moles of Cl2 =  42.6 g /71 g/mol = 0.6 moles

If 2 moles of Al reacts with 3 moles of Cl2

x moles of Al reacts with 0.6 moles of Cl2

x = 0.4 moles

Al is the limiting reactant

Mass of AlCl3 = 0.4 moles * 133 g/mol = 53.2 g

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When the child sits on the partially filled balloon, the pressure of the balloon increases. The pressure change is a doubling of the initial pressure, indicating a factor of 2 increase.

When the child sits on a partially filled balloon, the volume of the balloon decreases by half. According to Boyle's Law, which states that the pressure of a gas is inversely proportional to its volume at constant temperature, the pressure inside the balloon increases.

Let's consider the initial volume of the balloon as V and the initial pressure as P. When the volume decreases by half, it becomes V/2. Since the amount of gas remains constant, the pressure increases to maintain equilibrium. The new pressure can be denoted as P'.

According to Boyle's Law, P₁V₁ = P₂V₂, where P₁ and V₁ are the initial pressure and volume, and P₂ and V₂ are the final pressure and volume. Plugging in the values, we have P * V = P' * (V/2).

Simplifying the equation, we get P' = 2P. This means the pressure of the balloon increases by a factor of 2, or it doubles. So, the pressure change can be expressed as an increase of two times the original pressure.

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Pulp

distillation

chromatography

Acetone is captured and cooled.

Substance A is rice, and substance B is sugar.

To separate the components of a mixture the substances to be separated must differ in a given physical property.

In chemistry, there are diverse separation techniques used to separate the components of a mixture. Separation depends on differences in a given physical property such as boiling point, solubility in a solvent, difference in particle size etc.

Filtration can be used to separate a solid from a liquid hence it can be used to separate pulp from orange juice.

To separate water and alcohol, distillation is used because such a separation depends on the difference in the boiling points of water and alcohol. Water boils at a higher temperature than alcohol hence the mixture can be separated by distillation.

Chromatography is a method of separation that is dependent on how quickly a the components of a  mixture move through a stationary phase.

Acetone has a lower boiling point than water hence it collected first and cooled before water.

Clearly, substance A must be a solid since it is filtered out after adding water. Substance B must be a water soluble substance which can be recovered from water by evaporation to dryness. Hence substance A is rice, and substance B is sugar.

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As you proceed down the periodic table, the metallic character becomes stronger. This is because as the atomic radius increases, there is less attraction between the nucleus and the valence electrons due to the greater distance between them, making electrons simpler to shed.

Sulphur Trioxide = So3

Sodium Hydroxide = NaoH

Answer:

\(\huge\boxed{Sulfur \ Trioxide\hookleftarrow}\)

\(\huge\boxed{Sodium \ Hydroxide\hookleftarrow}\)

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Answer:

a) 6.17 g of solid KOH

b) 88.0 mL of a 1.25 M potassium hydroxide solution​

Explanation:

a) We have to determine the mass of solid potassium hydroxide that has to be weighed to prepare 220 mL of a 0.500 M potassium hydroxide solution. We will also require the molar mass of potassium hydroxide, KOH, 56.11 g/mol.

0.220 L × (0.500 mol/L) × (56.11 g/mol) = 6.17 g

b) We will use the dilution rule to determine the volume of the 1.25 M potassium hydroxide solution​ to be measured.

C₁ × V₁ = C₂ × V₂

V₁ = C₂ × V₂ / C₁

V₁ = 0.500 M × 220 mL / 1.25 M = 88.0 mL

Answer:

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triamminechloroplatinum(II) nitrite

The pH is 0.660.

To calculate the pH of the solution, we need to determine the concentration of hydronium ions ([H3O+]) in the solution.

First, we need to find the concentration of the pyridinium fluoride \((C5H5NHF)\)that ionizes to form hydronium ions (H3O+) and fluoride ions (F-).

Initial moles of pyridinium fluoride \((C5H5NHF)\) = 0.219 mol

Volume of the solution = 1.00 L

Since the solution is made up to 1.00 L, the concentration of pyridinium fluoride is:

C(C5H5NHF) = 0.219 mol / 1.00 L = 0.219 M

Next, we need to determine the equilibrium concentrations of hydronium ions ([H3O+]) and fluoride ions ([F-]) using the dissociation reaction of pyridinium fluoride:

C5H5NHF + H2O ⇌ C5H5NH+ + F-

From the dissociation reaction, we can see that for every 1 mole of pyridinium fluoride that dissociates, we get 1 mole of hydronium ions and 1 mole of fluoride ions.

Therefore, the equilibrium concentrations of [H3O+] and [F-] are both equal to the concentration of pyridinium fluoride:

[H3O+] = [F-] = 0.219 M

Since we have the concentration of hydronium ions, we can calculate the pH using the formula:

pH = -log[H3O+]

pH = -log(0.219) = 0.660

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Answer:

44 neutrons

Explanation:

To find the neutrons of an atom subtract the atomic number from the mass of the atom

in this case

80-36=44

tge number of neutrons that are in that atom is 48

The charge of the ion from the sulfur atom would have 2- ionic state.

Sulfides/sulfur ions are inorganic sulfur anions of the formula S2- or compounds containing one or more S2- ions. Solutions of sulfide salts are corrosive. Sulfides also refer to a large family of chemical compounds, inorganic and organic compounds. Lead sulfide and dimethyl sulfide. Hydrogen sulfide and disulfide are conjugate acids of sulfides.

However, the name sulfide is also used in IUPAC nomenclature for compositions that do not assume the type of bond involved. Examples of such names are selenium disulfide and titanium sulfide, which do not contain sulfide ions.

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Answer:

c.1.5 moles of cu Will contain a total of 9.0 * 10 ^ 23 ATOMS.

To convert moles into atoms they molar amount and number of atom is múltiples by avagadro's number.

Answer: alright people, they're talking about the ro.ck candy experiment. how do I know this? because I need this answer.

Answer:

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Explanation: