what is the ph of a 80.0 ml solution which is 0.23 m in io− and 0.47 m in hio ? the a for hio is 2.3×10−11 .

Answer: B. X2Y3

Explanation:

The ionic compounds generally contains ionic bonds. An ionic bond is formed by the transfer of electrons from one atom to another. Here the chemical formula of the compound is X₂Y₃. The correct option is B.

The compounds which are formed by the reaction of metals with non-metals are called ionic compounds. Such compounds contains oppositely charged ions. The positively charged ions are called cations whereas the negatively charged ions are called anions.

The chemical formula of ionic compounds is written in such a way that the cation should be written first and then the anion. The cation is present on the left part whereas the anion on the right part.

The charge on the cation and the anion should be crossed over. The crossed over number should be written as subscripts. Here the charge on y (-2) is exchanged with the charge on x (+3). So the formula becomes  X₂Y₃.

Thus the correct option is B.

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Answer:

bacteria

Explanation:

Answer:

\(\boxed {\tt 944.748 \ grams}\)

Explanation:

The formula for density is:

\(d=\frac{m}{v}\)

Rearrange the formula for mass, m. Multiply both sides by v.

\(d*v=\frac{m}{v} *v\)

\(d*v=m\)

Mass is found by multiplying the mass by the volume.

The density of the gold is 19.32 grams per cubic centimeter. The volume is 48.9 cubic centimeters.

\(d= 19.32 \ g/cm^3 \\v=48.9 \ cm^3\)

Substitute the values into the formula.

\(m= 19.32 \ g/cm^3 *48.9 \ cm^3\)

Multiply. Note the centimeters cubed will cancel out.

\(m= 19.32 \ g * 48.9\)

\(m= 944.748 \ g\)

The mass of the gold is 944.748 grams.

Answer:

digestive system

.

Explanation:

There are 0.0002 moles of sodium chloride in the test tube, assuming a concentration of 0.1 M.

In order to calculate the number of moles of sodium chloride in the test tube, we would need to know the concentration of the sodium chloride solution. This information is required because the number of moles of a substance is directly proportional to the concentration and volume of the solution.

Once we have the concentration of the sodium chloride solution, we can use the formula:

moles of solute = concentration (in moles per liter) x volume (in liters)

To illustrate, let's assume that the concentration of the sodium chloride solution is 0.1 M (0.1 moles per liter). Therefore, the number of moles of sodium chloride in the 2.0 mL test tube can be calculated as follows:

Volume in liters = 2.0 mL ÷ 1000 mL/L = 0.002 L

moles of NaCl = concentration x volume

= 0.1 mol/L x 0.002 L

= 0.0002 moles

Therefore, there are 0.0002 moles of sodium chloride in the test tube, assuming a concentration of 0.1 M.

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Answer:

2

Explanation:

Answer:

Liquids have more kinetic energy than solids. When a substance increases in temperature, heat is being added, and its particles are gaining kinetic energy. Because of their close proximity to one another, liquid and solid particles experience intermolecular forces. These forces keep particles close together.

Explanation:

hope it helps U

Answer:

44 grams/mole

Explanation:

If 1 mol of XO₂ contains the same number of atoms as 60 g of XO3, what is the molar mass of XO₂?

60 grams of XO3 is one mole XO3, since it has the same number of atoms as 1 mole of XO2.

Let c be the molar mass of X.  The molar mass of XO3 is comprised of:

X:  c

3O:  3 x 16 = 48

Total molar mass of XO3 is = 48 + c

We know that the molar mass of XO3 = 60 g/mole, so:

48 + c  = 60 g/mole

c = 12 g/mole

The molar mass of XO2 would be:

1 X = 12

2 O = 32

Molar mass = 44 grams/mole, same as carbon dioxide.  Carbon's molar mass is 12 grams.

The correct answer is:

Keq<1, ΔG∘>0

When a system is at equilibrium, the forward and reverse reactions occur at equal rates. At this point, the concentrations of the reactants and products do not change over time. The equilibrium constant (Keq) is a measure of the relative concentrations of the reactants and products at equilibrium.

If the reactants are more abundant at equilibrium, it means that the equilibrium lies towards the side of the reactants. This suggests that the value of Keq is less than 1, since the ratio of products to reactants is low. Additionally, a positive ΔG∘ (standard free energy change) indicates that the reaction is not spontaneous in the forward direction, meaning that energy must be added to the system to proceed in that direction.

Therefore, the correct statement is: Keq<1, ΔG∘>0.

It's important to note that this answer assumes standard conditions (25°C, 1 atm pressure, and 1 M concentration). At different temperatures and concentrations, the values of Keq and ΔG∘ may change.

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Answer:

1.03L

Explanation:

M1V1=M2V2

0.200L×18M=3.5M×V1

3.6=3.5M×V1

divide both sides by 3.5M to cancel out on the right

3.6÷3.5M=1.028L

Claim:  Earth's atmospheric CO2 levels were measured over the past 1000 years and correlated with average world temperatures.  The data demostrate that Earth's temperature did not change during the period CO2 levels were steady.  But the past 100 years show a dramatic rise in CO2 levels, with a corresponding rise in world temperatures.  The CO2 rise can be traced back to the start of the industrial revolution, when machines began doing much of the work.  These machine burn fossil fuels and the increased CO2 levels have led to a dramatic rise in world temperatures.  The data clearly show the importance of reducing fossil fuel useage, as well as other CO2 emitters.  A world of incresing temperatures will lead to greater natural disasters, such as storms, flooding, hurricanes, and drought - all of which upset the ecological balance of the planet.

Answer:  6 miles

Explanation:

(1 gallon/4 quarts)*(1 quart)*(24 miles/gallon)= 6 miles

Answer:

Nepal is a multilingual, multiethnic, multicultural and multi-religious nation. Unity in diversity is the defining characteristics of Nepali society. Mutual coexistence, tolerance and cooperation have guided the people in achieving social cohesion, peace and happiness.

Explanation:

Please mark as brainliest!

Answer:

In the context of radical polymerization, the initiators are substances that generate free radicals to initiate the polymerization reaction. Among the options you provided, the initiators for radical polymerization are:

KOH (potassium hydroxide): KOH is not typically used as an initiator in radical polymerization. It is more commonly used as a base or catalyst in other types of reactions.

BuLi (n-butyllithium): BuLi is a strong base and is often used as an initiator in anionic polymerization but not in radical polymerization.

CH3OOCH3 (methyl ethyl ketone peroxide, MEKP): MEKP is a commonly used initiator in radical polymerization. It decomposes to generate free radicals, which initiate the polymerization process.

HCl (hydrochloric acid): HCl is not typically used as an initiator in radical polymerization. It is an acid and can be used for other purposes in polymerization reactions, such as catalysis.

BF3 (boron trifluoride): BF3 is not typically used as an initiator in radical polymerization. It is more commonly used as a Lewis acid catalyst in various chemical reactions.

H2O (water): Water is not typically used as an initiator in radical polymerization. It can be present in the reaction as a solvent or reactant, but it does not generate free radicals to initiate the polymerization.

Therefore, among the options you provided, CH3OOCH3 (methyl ethyl ketone peroxide, MEKP) is the initiator commonly used in radical polymerization.

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Answer:

A

Explanation:

on edge

Answer:

The answer is a

Explanation:

The pH values at which amino acid have the best buffering capacity are 2.34 and 9.69.

The largest buffering capabilities of monoamino monocarboxylic acids are found in the two pH ranges closest to their pK′ values. Buffer capacity refers to the ability of a solution to resist changes in pH which can be either absorbing or desorbing H+ and OH- ions. It is the moles of an acid or base required to change the pH of a solution by 1, divided by the pH change and the volume of buffer in liters. Buffer capacity is a unitless number. When an acid or base is added to a buffer system, the pH change can be small or large which depends on both the initial pH and the capacity of the buffer to resist change in pH. Hence, a buffer resists changes in pH due to the addition of an acid or base though consumption of the buffer.

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The substance that would be least likely to dissolve in dichloromethane among the three mentioned in the question is sucrose.

A headache is a common symptom that causes discomfort or pain in the head, scalp, or neck. It's one of the most common medical complaints. Most headaches are harmless and go away on their own, although some people have headaches that are a sign of a more severe medical problem. Dichloromethane, also known as methylene chloride, is a colourless, volatile liquid with a slightly sweet aroma. It is a nonflammable, chlorinated organic solvent used for a variety of purposes, including paint stripping, degreasing, and cleaning.

Headache Gone contains sucrose, aspirin, and the unknown component (phenacetin or acetanilide). Sucrose, also known as table sugar, is a disaccharide composed of glucose and fructose. Sucrose is a type of carbohydrate that is water-soluble and highly soluble in ethanol but not soluble in dichloromethane. As a result, sucrose is the substance in Headache Gone that is least likely to dissolve in dichloromethane.

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Answer: 68 and liquid

Explanation:

68 because the room temperature is balanced with the fish bowl and liquid because milk can flow and doesn’t have a fixed volume

The mass of sodium tetraoxosulphate (VI) formed when 0.5 mole of sodium hydroxide reacts with tetraoxosulphate ions is 71.0 g.

To calculate the mass of sodium tetraoxosulphate (VI) formed, we first need to write a balanced chemical equation for the reaction between sodium hydroxide (NaOH) and tetraoxosulphate (VI) ions (\(SO4^2\)-):

\(NaOH + H_{2}SO_{4} \rightarrow Na_{2}SO_{4} + 2H_{2}O\)

From the balanced equation, we can see that 1 mole of NaOH reacts with 1 mole of \(H_{2}SO_{4}\) to produce 1 mole of \(Na_{2}SO_{4}\). Therefore, the number of moles of \(Na_{2}SO_{4}\) produced can be calculated using the following formula:

moles of \(Na_{2}SO_{4}\) = moles of NaOH

Since we are given 0.5 moles of NaOH, we know that 0.5 moles of \(Na_{2}SO_{4}\) will be produced.

To calculate the mass of \(Na_{2}SO_{4}\) produced, we need to know its molar mass.

\(Na_{2}SO_{4}\) molar mass = 2(Na atomic mass) + 1(S atomic mass) + 4(O atomic mass)

\(Na_{2}SO_{4}\) molar mass = 2(23.0 g/mol) + 32.1 g/mol + 4(16.0 g/mol)

\(Na_{2}SO_{4}\) molar mass = 142.0 g/mol

Now, we can use the following formula to calculate the mass of \(Na_{2}SO_{4}\) produced:

mass = moles * molar mass

mass = 0.5 mol * 142.0 g/mol

mass = 71.0 g

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We have the following formula for concentration:

M = n/V

where M is molarity (concentration), n is number of moles of the solute, or it can be the amount of the solute and V is the volume of the solution.

If you kept constant V and increases n, M will increase as well.

So the concentration will increase.

Answer: D.) it increases (becomes more concentrated)

Answer:

M2 = 0.95M

Explanation:

M1V1 = M2V2

(1.9)(0.5) = M2(1)

M2 = 0.95M

Answer:

Because.in theory, it's impossible for philosophers (Greeks) don't have the proper equipment and also they don't have enough facts to back it up

Explanation:

Hope this helps

(a) The difference in Gibbs free energy (∆G) between the alternative chair conformations of trans-4-Methylcyclohexanol is 0 kJ/mol.

(b) The difference in Gibbs free energy (∆G) between the alternative chair conformations of cis-4-Methylcyclohexanol is 0 kJ/mol.

(c) The difference in Gibbs free energy (∆G) between the alternative chair conformations of trans-1,4-Dicyanocyclohexane is -1.6 kJ/mol.

(a) In trans-4-Methylcyclohexanol, the methyl group is in an equatorial position in both chair conformations. Since the Gibbs free energy for a methyl group is -7.28 kJ/mol, and there is no change in its position, the difference in ∆G is 0 kJ/mol.

(b) In cis-4-Methylcyclohexanol, the methyl group is in an axial position in both chair conformations. Similar to the previous case, there is no change in the position of the methyl group, so the difference in ∆G is 0 kJ/mol.

(c) In trans-1,4-Dicyanocyclohexane, the cyano groups are in a trans configuration in both chair conformations. Since the Gibbs free energy for a cyano group is -0.8 kJ/mol, and there are two cyano groups involved, the difference in ∆G is -0.8 kJ/mol × 2 = -1.6 kJ/mol.

These calculations are based on the given Gibbs free energy values for the respective substituents, assuming they are the only factors contributing to the differences in ∆G. Other factors such as steric effects and electronic interactions may also influence the conformational stability to some extent.

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Answer:

d

Explanation:

its right to be sydinachiondical

Answer:

D. Kinetic energy converting to gravitational potential energy.

APEX

The processes have a negative ΔS are N₂ (g) + 3 H₂ (g) → 2 NH₃ and N₂ (g) → N₂ (l)

So the correct answer is B and E

In the given processes, those with a negative ΔS (change in entropy) involve a decrease in disorder.

Process (b) N₂ (g) + 3 H₂ (g) → 2 NH₃ (g) has a negative ΔS, as the number of gas particles decreases from 4 moles to 2 moles, reducing the disorder.

Process (e) N₂ (g) → N₂ (l) also has a negative ΔS, as the transition from gas to liquid represents a decrease in entropy due to the more structured arrangement of particles in the liquid state.

The other processes increase the disorder and have a positive ΔS.

Hence,the answer if the question is B and E.

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