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The reaction C(s) + O₂ (g) → CO₂ (s) has a AH=-394kJ .
How much heat will be required to produce 1 mole of Fe by the reverse reaction?

A) -394 kJ
B) -197 kJ
C) 394 kJ
D) 788 kJ

To calculate the time it will take to plate out 1.86 g of chromium metal when a current of 15.0 A is applied to a solution of Cr3+ ions, we can use Faraday's Law of Electrolysis:

This law states that the amount of substance deposited at an electrode during electrolysis is directly proportional to the amount of electric charge that passes through the solution.

t = (1.86 g Cr) / (F * I * n * m)

Where F is Faraday's Constant (96485 C/mol), I is the current (15 A), n is the number of electrons exchanged (3) and m is the molar mass of chromium (52 g/mol).

Substituting the values in place we get

t = 1.86 g / 96485 * 15 * 3 * 52

[The units for a charge, electricity and gram get canceled out and we are left with the unit of time]

Thus giving us a result of t = 1.6 seconds.

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The approximate height of the barrel is 22.9 inches. They are also important in mathematics and engineering, as they are used to model and solve problems in various fields, such as calculus, geometry, physics, and fluid mechanics.

What is Cylinder?

A cylinder is a three-dimensional geometric shape that consists of two parallel, congruent circular bases connected by a curved surface. The curved surface is composed of a set of parallel lines that connect the two circular bases.

The cylinder can be described by several measurements, including its height (the distance between the two circular bases), its radius (the distance from the center of one circular base to its edge), and its diameter (the distance across the cylinder at its widest point, passing through the center of the circular bases).

We can use the formula for the volume of a cylinder to find the height of the barrel:

V = πr²h

We are given that the volume of the oil is 10,164 cubic inches and the diameter (which is twice the radius) is 23 inches.

r = 23/2 = 11.5 inches

10,164 = π(11.5)²h

Solving for h, we get:

h = 10,164 / (π(11.5)²) ≈ 22.9 inches

So the approximate height of the barrel is 22.9 inches.

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-1113.5kJ is the theoretical enthalpy of combustion.

What makes energy different from enthalpy?

The entire amount of heat energy that is either absorbed or released in a thermodynamic system is measured by enthalpy. Internal energy denotes all of the potential or moving energy present in a thermodynamic system.

Enthalpy of combustion is the term used to describe the change in a system's enthalpy that occurs when one mole of a substance fully burns in oxygen or air at a specific temperature.

C₂H5OH()+302(g) → 2CO2(g) + 3H₂O(1)

Reactants:

5 C-H : 5*412

1 C-C : 348

1 C-O: 358

3 O=O: 3* 496

1 O-H: 463

Products:

2*2 C=O : 4*743

2*3 O-H: 6*463

Enthalpy of Vaporization (kJ mol-¹) for :

Ethanol 42.5

Water 41​

Enthalpy of combustion : (5*412 + 348 + 358 + 3* 496 + 463 + 42.5) - ( 3*41 + 4*743 + 6*463)    

                                        : -1113.5kJ

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The precipitate that forms is lead(II) chloride (PbCl2), which is a white solid.

A chemical reaction is a process in which one or more substances are transformed into one or more different substances. During a chemical reaction, the bonds between the atoms in the reactants are broken, and new bonds are formed to create the products.

The chemical formula for lead(II) nitrate is Pb(NO3)2. When dissolved in water, it dissociates into Pb2+ and 2NO3- ions:

Pb(NO3)2 (aq) → Pb2+ (aq) + 2NO3- (aq)

If a solution of lead(II) nitrate is mixed with a solution containing chloride ions (Cl-), a precipitate of lead(II) chloride (PbCl2) will form, since lead(II) chloride is insoluble in water. The balanced chemical equation for the reaction is:

Pb(NO3)2 (aq) + 2NaCl (aq) → PbCl2 (s) + 2NaNO3 (aq)

The precipitate that forms is lead(II) chloride (PbCl2), which is a white solid.

Therefore, the  spectator ions in the reaction are Na+ and NO3-. These ions do not participate in the reaction, and they remain in solution after the reaction is complete.

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To convert propane to butan-2-ol, follow a multi-step synthesis, which is specified below.

It is a chemical strategy where a series of chemical reactions are employed  to synthesize a desired compound from the provided substrate.

Here's how we can synthesize butan-2-ol from propane:

                                         C₃H₈ + 2[O] → CH₃CH₂CH₂O

                                       CH₃CH₂CH₂OH → CH₃CH=CH₂+ H₂O

                                       CH₃CH=CH₂ + H₂ → CH₃CH₂CH₃

                                     C₄H₁₀+ 3[O] → CH₃COCH₂CH₃ + H₂O

                                 CH₃COCH₂CH₃ + 2[H] → CH₃CH(OH)CH₂CH₃

So the overall reaction would be:

C₃H₈ + 5[O] + 2[H] → CH₃CH(OH)CH₂CH₃

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The calorific value of the candle is 40 J/g.

The calorific value (CV) of the candle is the amount of heat energy released when 1 kg of the candle is burned.

To calculate the CV, first convert the mass of the candle burnt from kg to g:

4.5 kg = 4500 g

Next, use the formula:

CV = Heat produced / Mass of candle burnt

where heat produced is in joules and mass of candle burnt is in grams.

First, let's convert the heat produced from kJ to J:

180.000 kJ = 180000 J

Now calculate the CV:

CV = 180000 J / 4500 g

CV = 40 J/g

Therefore, the calorific value of the candle is 40 J/g.

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Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

QUESTION 5:

According to question 5, 4 moles of iron reacts with 3 moles of oxygen gas to produce 2 moles of ferric oxide.

56.33 grams of iron is equivalent to 1.01 moles

This means that 1.01 moles of iron will produce 0.51 moles of ferric oxide.

Mass of ferric oxide = 0.51 × 159.69 = 80.6 grams.

QUESTION 6:

According to question 6, 3 moles of hydrogen gas reacts with 1 mole of nitrogen gas to produce 2 moles of ammonia.

13.55 grams of hydrogen is equivalent to 6.78 moles

This means that 6.78 moles of hydrogen will produce 4.52 moles of ammonia

Mass of ammonia = 4.52 × 17 = 76.8 grams.

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The mass of the baking soda is 4.5 g

A conversion factor is a ratio that is used to convert one unit of measurement to another. Conversion factors are commonly used in scientific calculations and in everyday life, when we need to convert one unit of measurement to another.

A conversion factor can be derived from the relationship between two different units of measurement.

Given that;

1 oz = 28.35 g

But

1 tsp = 0.212 oz

Thus;

0.750 tsp will be  0.750 tsp * 0.212 oz/1 tsp

= 0.159 oz

Then;

1 oz = 28.35 g

Thus;

0.159 oz =  0.159 oz * 28.35 g/ 1oz

= 4.5 g

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Answer:

2.637 L

Explanation:

The volume of oxygen O2 found in 41.1 grams of oxygen at STP can be calculated using the ideal gas law equation PV = nRT, where P is the pressure, V is the volume, n is the number of moles of oxygen, R is the ideal gas constant, and T is the temperature.

Using the molar mass of oxygen, which is 32 g/mol, we can calculate the number of moles of oxygen in 41.1 g of oxygen:

n = 41.1 g/ 32 g/mol = 1.28125 moles

At STP, the pressure is 101.325 kPa and the temperature is 273.15 K. Plugging these values into the ideal gas law equation gives us:

V = (1.28125 mol)(0.08206 L•atm/mol•K)(273.15 K) / (101.325 kPa) = 2.637 L

The heat capacity is obtained from; c= q/mdT

Specific heat is the amount of heat energy required to raise the temperature of one unit mass of a substance by one degree Celsius (or one degree Kelvin) without a change in state. It is a property of a substance that depends on its chemical composition and molecular structure.

The specific heat of a substance is usually measured in units of joules per kilogram per degree Celsius (J/kg°C) or in calories per gram per degree Celsius (cal/g°C). The specific heat of a substance can be measured experimentally by heating a known mass of the substance and measuring the amount of heat energy required to raise its temperature by a certain amount.

Since the question is incomplete and the values are missing, We can see that the specific heat can be obtained when it is made the subject of the formula as shown below.

We now know that;

q=mcdT

Then c is obtained from;

c= q/mdT

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Liters of a 40% solution are equivalent to 252 liters, whereas liters of a 15% solution are equivalent to 448 liters.

How much is a percentage?

The hundredth part of a given number is what is meant by the word "percentage."

The answer to the query is

Given,

700 litres of solution total.

Acid solution percentage is equal to 24%.

'x' stands for a 40% acid solution.

"700-x" stands for the 15% of the solution.

Replace the value according to the condition we are provided,

Therefore,

252 litres of acid solution with a 40% concentration

Moreover, 15% of the solution is

As a result, 252 liters of a 40 percent solution are equal to one liter, and 448 liters of a 15 percent solution are.

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The manufacturer needs to use 252 liters of the 40% solution and 448 liters of the 15% solution to obtain 700 liters of a 24% acid solution.

Let x be the number of liters of the 40% solution and y be the number of liters of the 15% solution needed.

Since we want to obtain 700 liters of a 24% solution, we can set up the following system of equations based on the concentration and amount of acid in each solution:

x + y = 700 (total volume of the solution)

0.4x + 0.15y = 0.24(700) (total amount of acid in the solution)

Simplifying the second equation, we get:

0.4x + 0.15y = 168

We can now use the first equation to solve for one of the variables in terms of the other:

y = 700 - x

Substituting this expression into the second equation, we get:

0.4x + 0.15(700 - x) = 168

Simplifying and solving for x, we get:

0.4x + 105 - 0.15x = 168

0.25x = 63

x = 252

So we need 252 liters of the 40% solution and 700 - 252 = 448 liters of the 15% solution.

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The release of heat energy and the formation of water (H2O) indicate a release of bond energy.

Heat energy is the energy transferred between two objects or systems that have different temperatures. It is a form of energy that is created when molecules move faster, creating kinetic energy in the form of heat. Heat energy is transferred by conduction, convection, and radiation. Conduction is the transfer of heat energy through direct contact between two objects. Convection is the transfer of heat energy through the movement of a fluid, such as air or water. Radiation is the transfer of heat energy through electromagnetic waves. Heat energy is used in many applications, including cooking, heating, and power generation.

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In comparison to cyclohexane, those following will be much more soluble in water.

The majority of cyclohexane is used to make thermoplastic intermediates and other typical uses for nylon, including garments, tents, and carpets. In recent years, benzene has been replaced by cyclohexane in many applications and is still utilized as a solvent in industrial and chemical operations.

Consuming cyclohexane could upset your stomach. At cyclohexane concentrations typically present in the environment, these effects are unlikely to manifest. The skin may become irritated if cyclohexane is spilled on it. Skin dryness and cracking may result from prolonged or repetitive skin contact.

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The solubility of barium iodate is 2.73 g/L.

Solubility is a measure of how much of a solid, liquid or gas can be dissolved in a solvent, such as water or another liquid. It is a property of a substance that determines how much of a given substance can be dissolved in a given amount of solvent. Solubility is an important factor in many areas of science and technology, such as chemistry, pharmacology, and food production. Solubility affects the rate of reaction, the process of forming a new substance, and the physical characteristics of a solution. It is also important for predicting the solubility of a given material and for understanding the behavior of a solution.

Solubility of barium iodate can be calculated using the Ksp expression:

Ksp = [Ba2+][IO3-]2

At equilibrium, we can assume that the concentration of Ba2+ and IO3- is equal to the solubility of barium iodate, s, in moles per litre.

[Ba2+] = [IO3-] = s

Substituting this into the Ksp expression, we get:

Ksp = s2 x (2s)2 = 4.01 x 10-9

Rearranging this equation to solve for s, we get:

s2 = 4.01 x 10-9/ (2s)2

s2 = 0.5 x 10-9

s = 0.007 moles/L

To convert this to grams per litre, we need to multiply by the molar mass of barium iodate, which is 391 g/mol.

s = 0.007 moles/L x 391 g/mol = 2.73 g/L

Therefore, the solubility of barium iodate is 2.73 g/L.

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The molecular and net ionic equations of reaction between potassium oxide (K₂O) and water (H₂O) are [tex]\mathrm{K_2O(aq)+H_2O(l)\rightarrow 2 KOH(aq)}[/tex] and [tex]\mathrm{O_2^{-}(aq)+H_2O(l)\rightarrow 2OH^{-}(aq)}[/tex]. The base, acid, and spectator ions in this reaction are O²⁻, water, and potassium.

The ions that do not participate in the interaction are referred to as spectator ions. They are found in the chemical reaction's reactant and product sides. The proton donor ion is referred to as acid and the proton acceptor ion is referred to as the base.

Let's write the complete ionic equation for the reaction between potassium oxide (K₂O) and water (H₂O).

[tex]\mathrm{2K^{+}(aq)+O^{2-}(aq)+H_2O(l)\rightarrow 2 K^{+}(aq)+2OH^{-}(aq)}[/tex]

Now, the net ionic equation is written as,

[tex]\mathrm{O_2^{-}(aq)+H_2O(l)\rightarrow 2OH^{-}(aq)}[/tex]

Then, the molecular equation is,

[tex]\mathrm{K_2O(aq)+H_2O(l)\rightarrow 2 KOH(aq)}[/tex]

From the equations, we can tell the acid ion is water, the base ion is O²⁻, and the potassium ion is the spectator ion.

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The complete question is -

As K₂O dissolves in water, the oxide ion reacts with water molecules to form hydroxide ions. (a) Write the molecular and net ionic equations for this reaction. (b) Based on the definitions of acid and base, what ion is the base in this reaction? (c) What is the acid in the reaction? (d) What is the spectator ion in the reaction?

Option (d) is correct. The total number of grams of sodium hydroxide needed to make 1. 0 liter of a 0. 20 m solution is 8.0 gram. It is calculated using the expression of molarity.  

Molarity is defined as the ratio of solute moles and solution length. We can obtain the acid solution molarity by dividing the amount of moles  of the solution in which it was dissolved. It is a measure of the concentration of a chemical species, in particular of a solute in a solution in terms of amount of substance per unit volume of solution. It can be expressed as,

Molarity = Moles / volume in liter

So the moles of sodium hydroxide = 0.2 mole

The Mole of sodium hydroxide is 0.2 mole and Molar mass of sodium hydroxide is 40 g/mole. We have to determine the mass of sodium hydroxide.

Mass is the product of the moles and the molar mass. It can be expressed as,

mass = moles * molar mass

          = 0.2 * 40

          = 8 gram

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The complete question is,

What is the total number of grams of NaOH (formula mass = 40.) needed to make 1.0 liter of a 0.20 M solution?

(1) 20. g (2) 2.0 g (3) 80. g (4) 8.0 g​

The number of atoms of titanium in 1.67 moles of each compound is calculated below.

We can use Avogadro's number to convert moles of each compound to the number of atoms of titanium in each compound. Avogadro's number is approximately 6.022 x 10^23 particles per mole.

FeTiO3 contains one atom of titanium per formula unit.

Number of moles of ilmenite = 1.67 mol

Number of atoms of titanium in 1.67 mol of ilmenite = 1.67 mol x (6.022 x 10^23 atoms/mol) = 1.005 x 10^24 atoms of titanium.

TiCl4 contains one atom of titanium per molecule.

Number of moles of TiCl4 = 1.67 mol

Number of molecules of TiCl4 in 1.67 mol = 1.67 mol x (6.022 x 10^23 molecules/mol) = 1.006 x 10^24 molecules

Number of atoms of titanium in 1.67 mol of TiCl4 = 1.006 x 10^24 molecules x 1 atom/molecule = 1.006 x 10^24 atoms of titanium.

One molecule of Ti3O5, there are 3 titanium atoms and 5 oxygen atoms.

Number of titanium atoms in 1.67 moles of Ti3O5 = (3 Ti atoms/molecule) x (1.67 moles) x (6.022 × 10^23 atoms/mole) = 1.0 x 10^24 Ti atoms.

One molecule of Ti2O3, there are 2 titanium atoms and 3 oxygen atoms.

Number of titanium atoms in 1.67 moles of Ti2O3 = (2 Ti atoms/molecule) x (1.67 moles) x (6.022 × 10^23 atoms/mole) = 2.0 x 10^24 Ti atoms

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The solubility of the solute in the solvent depends on intermolecular interactions.

The nature of the solute and the solvent alone determines how soluble they are in a solvent. In a polar solvent, a polar solute dissolves. In a non-polar solvent, a polar solute is poorly soluble. In a non-polar solvent, a non-polar solute dissolves.

Since the question is incomplete, we can not see what the solute or the solvent ought to have been. However, we must know that the solubility of the solute in the solvent must depend on intermolecular interactions between the both.

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Answer:

the concentration of the sodium chloride solution is 0.34 mmol/L, rounded to two significant digits.

Explanation:

To calculate the concentration of the sodium chloride solution, we first need to convert the amount of NaCl from micromoles (umol) to moles (mol) using the following conversion factor:

1 umol = 1 × 10^-6 mol

So, 68. umol of NaCl is equal to:

umol x (1 mol / 1 × 10^6 umol) = 6.8 × 10^-5 mol

Next, we can use the formula for molarity to calculate the concentration of the solution:

Molarity = moles of solute / volume of solution in liters

The volume of the solution is given as 200. mL, or 0.200 L. Substituting the values we have calculated, we get:

Molarity = 6.8 × 10^-5 mol / 0.200 L = 0.00034 mol/L

Finally, we can convert the concentration from mol/L to mmol/L by multiplying by 1000:

0.00034 mol/L x 1000 mmol/mol = 0.34 mmol/L

C. Weak acids are only partially ionized in an aqueous solution. When a weak acid is dissolved in water, only a fraction of the acid molecules will donate a proton to water to form hydronium ions, resulting in a solution with a lower concentration of hydronium ions and a higher pH compared to a strong acid with the same concentration.

What is Aqueous Solution?

An aqueous solution is a solution in which the solvent is water. In such a solution, water molecules surround and interact with the solute ions or molecules. Aqueous solutions are very common in nature and are widely used in chemistry, biology, and industry. For example, the fluids in our bodies are aqueous solutions, and many chemical reactions occur in aqueous solutions. The properties of aqueous solutions, such as their acidity or alkalinity, electrical conductivity, and freezing point, depend on the nature and concentration of the solute dissolved in the water.

Weak acids are substances that do not completely dissociate into ions in aqueous solutions. Instead, they exist as a mixture of ions and undissociated molecules in a dynamic equilibrium. This means that only a fraction of the acid molecules dissociate into their respective ions, while the rest remain undissociated.

Because of this partial dissociation, waek acids are not strong sources of hydronium ions (H3O+), which determine the pH of a solution. Instead, they provide a buffer system that can help resist changes in pH when small amounts of acid or base are added to the solution.

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In the model of isostasy, the wooden block represents a landmass or a portion of the Earth's crust.

Isostasy is the equilibrium that exists between the Earth's crust and the mantle, where the crust "floats" on the denser mantle like an iceberg floats on water.

The wooden block in the beaker of water simulates the concept of buoyancy. The block displaces an amount of water equal to its own weight, which means that the block's weight is supported by the upward buoyant force of the water. This is similar to how the Earth's crust is supported by the denser mantle below it.

By adding weights to the wooden block, the student can simulate the effects of additional mass or load on the Earth's crust, which can cause it to sink or rise relative to the mantle. This model helps to demonstrate the dynamic equilibrium that exists between the Earth's crust and mantle, and how changes to one can affect the other.

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Answer:

The overall balanced chemical equation for the reaction is: 3O3 → 3O2 + O b. The intermediate in the mechanism is O3. c. The order of the reaction is first order with respect to O3 and second order with respect to O. d. The rate law for the overall reaction is rate = k[O3]^1[O]^2.

Assuming that the volume of the tyre does not change, and that air behaves as an ideal gas, find the gauge pressure of the air in the tyre.

What is volume ?

Volume is nothing but the quantity of area the container fills or holds. Volume is always in a dimensional space, especially three. A solid always has a definite shape. Volume is anything to be held, like solid, liquid, or gas. The volume should be in ml, l, and so on. Finding the volume to know the weight and depth of the container.

What is pressure ?

The pressure is nothing but the vital force applied to the object or particle. Pressure calculates how much force will be gone or extended to the object. Pressure is the force that is perpendicular to the power of extension. The standard unit of pressure is the pascal (pa). The formula for pressure, p= F/ A, p= pressure, F= magnitude, A= area of the surface

pressure is the scalar quantity. Pressure is also expressed in the term atmospheric pressure, atm.

Therefore, Assuming that the volume of the tyre does not change, and that air behaves as an ideal gas, find the gauge pressure of the air in the tyre.

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Answer:

2.94 g/cm3

Explanation:

To find the bulk density of the rock, we need to consider the weighted average of the densities of each mineral component, taking into account their respective proportions:

Bulk density = (0.3 x 2.65 g/cm3) + (0.25 x 3.50 g/cm3) + (0.35 x 2.70 g/cm3) + (0.1 x 3.28 g/cm3)

Bulk density = 0.795 + 0.875 + 0.945 + 0.328

Bulk density = 2.943 g/cm3

Therefore, the bulk density of the rock is 2.94 g/cm3 (rounded to two decimal places).

To obtain  experimental measurements with maximum accuracy one should select a liquid with a larger value of Kf as there should be larger difference in depression in freezing point.

Accuracy  in terms of chemistry can be defined as to how close a measurement is to the true value.There are three types of accuracy:

1) Point accuracy-It means accuracy is present at that point of scale only.It does not give any information about the accuracy of the instrument.

2)Percentage of true value--It is the accuracy  which is determined by identifying accuracy of the instrument  and comparing it with the measured true value.

3)Percentage of scale range- It is the accuracy  which determines accuracy of the measurement.

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The empirical formula of the compound is C2H0O0N0S0, or C2H0NS.

The empirical formula is a type of chemical formula that gives the simplest whole number ratio of atoms present in a molecule. It is the simplest type of formula that indicates the type of atoms and the ratio of atoms present in a molecule, rather than the actual number of atoms. For example, the empirical formula of glucose is CH₂O, which tells us that there is one carbon atom, two hydrogen atoms and one oxygen atom present in each molecule of glucose.

The empirical formula can be determined by finding the ratio of the mass of each element from the combustion of each sample.

Sample 1:

C: 3.93 g/12.01 g/mol = 0.3283 mol

H: 0.674 g/1.008 g/mol = 0.6689 mol

O: 5.50 g/15.999 g/mol = 0.3441 mol

N: 0 mol

S: 0 mol

Sample 2:

C: 6.32 g/12.01 g/mol = 0.5267 mol

H: 0 mol

O: 0 mol

N: 0 mol

S: 3.22 g/32.06 g/mol = 0.1001 mol

Sample 3:

C: 8.93 g/12.01 g/mol = 0.7417 mol

H: 3.58 g/1.008 g/mol = 3.5479 mol

O: 0 mol

N: 0.674 g/14.007 g/mol = 0.0481 mol

S: 0 mol

The ratio of the moles of each element can be determined by taking the moles of each element from sample 1, and dividing them by the moles of the respective element from sample 2 and 3:

C: 0.3283 / 0.5267 = 0.625

H: 0.6689 / 3.5479 = 0.189

O: 0.3441 / 0 = undefined

N: 0 / 0.0481 = 0

S: 0 / 0.1001 = 0

Rounding the ratios, we get C: 2, H: 0, O: 0, N: 0, and S: 0.

The empirical formula of the compound is C2H0O0N0S0, or C2H0NS.

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Granulocytes are leukocytes that have visible granules and agranulocytes are leukocytes that don't have visible granules.

Leukocytes, widely known as white blood cells, are blood cells that lack haemoglobin, have nucleus, and can move. They protect the body from disease and infection by swallowing foreign objects and cell debris, eradicating infectious agents, killing cancer cells, or manufacturing antibodies. Bone marrow produces white blood cells, and organs like the kidneys, liver, and spleen control how much of them are generated at any given time.

The two categories of white blood cells, are granulocytes and agranulocytes.

Agranulocytes lack cytoplasmic granules or sacs, whereas granulocytes do. In the battle against infection and disease, each type of granulocyte and agranulocyte serves different function.

Basophils, neutrophils, and eosinophils are the three different types of granulocytes.

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The 0.0500 M HNO2 solution has a pH of 1.81 and a 44.5% ionisation percentage.

A solution's acidity or basicity is determined by its pH. It is described as the solution's hydrogen ion concentration's negative logarithm. While lower pH values denote acidity and higher ones denote basicity, a pH of 7 is regarded as neutral.

Since HNO2 is a weak acid, the percent ionisation and pH of the solution can be determined using the acid dissociation constant (Ka) formula.

Ka = (H+)(NO2-)/(HNO2)

We can write: Ka = x2 /, where x is the concentration of H+ and NO2- and (0.0500-x) is the concentration of HNO2 (0.0500 - x)

The quadratic formula is used to solve for x, and the result is x = 0.0154 M

For these reasons, [H+] = [NO2-] = 0.0154 M and [HNO2] = 0.0346 M.

We apply the formula: to determine the % ionisation.

% ionisation is calculated as [H+]/[HNO2] x 100%, or (0.0154 / 0.0346) x 100, or 44.5%

We use the following formula to determine pH:

pH = -log(0.0154) = 1.81 where pH = -log(H+)

As a result, the 0.0500 M HNO2 solution has a pH of 1.81 and a 44.5% ionisation percentage.

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Answer: The name of the following compounds are:

a. Magnesium nitride                                                                                                 b. Potassium Fluoride                                                                                                 c. Sodium Oxide                                                                                                               d. Lithium sulfide                                                                                                        e. Cesium Fluoride                                                                                                         f. Potassium iodide

Explanation:

The name of ionic compounds, Mg₃N₂ is magnesium nitride, KF is potassium fluoride, Na₂O is sodium oxide, Li₂S is lithium sulfide, CsF is cesium fluoride, and KI is potassium iodide.

Ionic compounds are compounds that are formed through the combination of positive and negative ions. They consist of a metal cation and a nonmetal anion. These compounds are held together by electrostatic forces, known as ionic bonds, resulting from the attraction between opposite charges.

The names of ionic compounds are often derived from the names of the constituent ions.

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