what would be the ph of an aqueous solution of sulphuric acid which is 5×10^_5 mol l^_1 in concentration​

Answer:

7.07585×10^24 molecules

Explanation:

# of Moles X Avogadro's Number= # of  Molecules

According to the concept of Avogadro's number, there are 7.075×10²⁴ molecules in 11.75 moles of water.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number. Number of molecules is calculated as:number of moles×Avogadro's number

∴number of molecules= 11.75×6.022×10²³=7.075×10²⁴ molecules.

Thus, there are 7.075×10²⁴ molecules in 11.75 moles of water .

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Decreasing the TBCl concentration will not affect the rate constant in this experiment. The rate constant is determined by the specific reaction and temperature conditions and is independent of the reactant concentrations.

The rate constant (k) is a proportionality constant that relates the rate of a reaction to the concentrations of the reactants. However, the rate constant itself is not affected by the concentrations of the reactants. It is determined by the specific reaction and temperature conditions.

The rate of a chemical reaction can be expressed using the rate equation, which typically includes the concentration terms for the reactants raised to certain powers.

These powers, known as reaction orders, can be determined experimentally. However, the rate constant is a separate factor in the rate equation and is not dependent on the reactant concentrations.

By decreasing the TBCl concentration, the rate of the reaction may be affected, as the rate is directly proportional to the reactant concentrations.

However, the rate constant itself remains unchanged. The rate constant is influenced by factors such as temperature, presence of catalysts, and the nature of the reacting species, but not by the concentrations of the reactants.

Therefore, decreasing the TBCl concentration will not affect the rate constant in this experiment.

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yes.

Explanation:

water is a universal solvent.

Answer:

4 moles of H3PO4

Explanation:

Molar mass of P4O10 = 284 g/mol

Number of moles of P4O10  reacted = 284g/284 g/mol = 1 mole of P4O10

From the reeaction equation;

1 mole of P4O10 yields 4 moles of H3PO4

Hence, 284 g of P4O10 yields 4 moles of H3PO4

Taking into account the definition of Scientific notation, the correct way to write the distance in scientific notation is option B. 4.217×10⁵ km.

First of all, scientific notation is a quick way to represent a number using powers of base 10. This notation is used to be able to express very large or very small numbers very easily.

The numbers are written as a product:

a×10ⁿ

where:

In this case, to write the number 421,700 in scientific notation, the following steps are performed:

So, the correct way to write the distance in scientific notation is option B. 4.217×10⁵ km.

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A man earned a $7,500 commission by selling a coin-operated laundry business, which has six more years before the expiration of its present lease. To evaluate whether or not this sale was worth it, we must calculate the total amount of money that the laundry business will generate in the remaining six years of its current lease.

This can be calculated as follows: Monthly revenue from laundry business = $2,500Commission paid to man = $7,500Revenue generated in one year = Monthly revenue x 12 = $2,500 x 12 = $30,000Revenue generated in six years = Revenue generated in one year x 6 = $30,000 x 6 = $180,000Therefore, the laundry business will generate $180,000 in the remaining six years of its lease. Given that the man earned a $7,500 commission by selling the business, this sale was definitely worth it as the amount of money generated from the business in the remaining six years of its lease far exceeds the commission paid to the man.

The man earned a $7,500 commission by selling a coin-operated laundry business that still had six years remaining on its current lease. To determine whether this sale was worthwhile, we must first calculate the amount of money the laundry business will generate during the remaining six years of its current lease. We can do this by determining the laundry business's monthly revenue and multiplying it by 12 to get the yearly revenue.

After that, we can multiply the yearly revenue by 6 to obtain the total revenue for the next six years.Since the monthly revenue from the laundry business is $2,500, the yearly revenue is $30,000 (2,500 x 12 = 30,000). The business will earn $180,000 in the six years remaining on its lease (30,000 x 6 = 180,000).Given that the man received $7,500 in commission by selling the business, we can determine that this was a profitable sale since the total revenue generated from the business in the next six years far exceeded the commission paid to the man.

It is clear that selling the coin-operated laundry business was worth it since the total revenue generated in the remaining six years of the lease was $180,000, whereas the man earned only $7,500 in commission for selling the business. This demonstrates that this was a profitable sale and an excellent business decision.

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The man in question is a commission-based sales agent who earned $7,500 by selling a coin-operated laundry business. The laundry business is still leased for another six years before the lease expires.This information alone is insufficient to make any meaningful conclusions about the man in question.

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Answer:

The acid mist is known as laze - a term combining the words lava and haze - when laze and sea water combine. Laze is potentially deadly if inhaled and can be hot and corrosive. If anyone goes near it, they can experience breathing difficulties and irritation of their eyes and skin.

Explanation:

hope it helps :)

Answer:

cryogenic distillation process

Explanation:

Cryogenic distinction between carbohydrates and harmon process.

The London dispersion force is "the weakest intermolecular force"

Answer:

True

Explanation:

Disaccharides are made up of two linked monosaccharides and are broken back down into monosaccharides during digestion ( 1 ). Sucrose is a disaccharide consisting of one glucose molecule and one fructose molecule, or 50% glucose and 50% fructose.

Answer:

I think the answer could be 13 i hope this helps

Answer:

Conclusion.....hope this helps

Answer:

conclusion

Explanation:

Answer:

A) The solubility of NH3 increases, and the

solubility of KCl increases.

Explanation:

The solubility of ammonia and potassium chloride increases with decrease in temperature from 40°C to 20°C.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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Answer:

Solar energy. Biofuel, Nuclear power, Hydro power, Geothermal energy, Fossil, Gasoline, sun

Answer:

Q2 Ga3+

Q3 There are no gaps/sticks between the potassium ions and the sulfur ions.

Explanation:

The pH of a solution with a weak acid concentration of 0.0460 M and a salt of its conjugate at a concentration of 1.31 M, resulting in a percent ionization of 0.0054, can be calculated using the Henderson-Hasselbalch equation and the concept of acid-base equilibrium.

The Henderson-Hasselbalch equation relates the pH of a solution to the concentrations of the weak acid and its conjugate base:

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

In this equation, pKa is the negative logarithm of the acid dissociation constant (Ka), [A-] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid.

To calculate the pH, we need to determine the pKa value of the weak acid. However, the given information does not provide the pKa directly.

Since we know the percent ionization of the weak acid, we can assume that it is a very weak acid, and the percent ionization is significantly less than 5%. Therefore, we can approximate the percent ionization to be negligible, indicating that [A-] ≈ 0 and [HA] ≈ initial concentration of the weak acid.

Using this approximation, we can rewrite the Henderson-Hasselbalch equation as:

pH ≈ pKa + log(0/0.0460)

Since log(0) is undefined, we can conclude that the concentration of the conjugate base is negligible, and the weak acid is mostly unionized.

Therefore, the pH of the solution is primarily determined by the concentration of the weak acid, which is 0.0460 M.

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The efficiency of a pulley system could be increased by (option D), which is by reducing the friction on the pulleys.

This can be achieved by lubricating the pulleys or replacing them with ones that have less friction. Option A would decrease the load on the system, but it wouldn't necessarily increase the efficiency. Option B could distribute the load among more pulleys, but it wouldn't necessarily improve the efficiency unless the pulleys were specifically designed to increase efficiency.

Option C would increase the force being applied to the rope, but it wouldn't necessarily increase the efficiency unless the additional force was being applied in a way that reduced friction or improved the mechanical advantage of the pulley system. The answer is option D.

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Answer:

ammonium carbonate option e

Potassium hydroxide will have the greatest total ion concentration at 25°C. The correct option is (C)

The total ion concentration is the sum of the molar concentration of all the ions in a solution. A solution of a compound will produce ions when dissolved in water, and the sum of the molar concentration of all the ions is known as the total ion concentration.

Potassium hydroxide (KOH) is a strong base that fully dissociates in water to produce potassium ions (K+) and hydroxide ions (OH-).So, if we add 1.0 mole of KOH to 1.0 L of water, we will obtain a 1.0 molar solution of KOH in which the molar concentration of K+ and OH- will both be 1.0 M.

On the other hand, ammonium carbonate, calcium phosphate, potassium chloride, and iron (II) nitrate will produce fewer ions in solution since they do not fully dissociate, so their total ion concentration will be lower.

Hence, we can say that, when 1.0 mole of the following compounds is added to 1.0 L of water, potassium hydroxide will have the greatest total ion concentration at 25°C.

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The net change in enthalpy required to produce one mole of nitric acid from nitrogen, hydrogen, and oxygen is -376 kJ.

A reaction's net change in enthalpy is equal to the sum of the energy needed to build all the bonds in the product molecules minus the energy needed to break all the bonds in the reactant molecules. If a reaction occurs under a constant pressure, the net change in enthalpy of the reaction is the amount of heat absorbed or released as the reaction proceeds. According to the specifics of the scenario and the facts at hand, you finish the calculation in a variety of methods.

With the formula HNO3, nitric acid is an inorganic substance. A mineral acid, it is quite corrosive. Ammonium nitrate, an important part of fertilisers, is made using nitric acid. In addition, it is employed in the synthesis of explosives such as trinitrotoluene (TNT) and nitroglycerin as well as in the oxidation of metals.

given,

N2(g) + 3H2(g) -----> 2NH3(g)

ΔH1 = -92kJ

NH3(g) + 2O2(g) ----> HNO3(g) + H20 (g)

ΔH2 = -330kJ

overall result of delta

ΔH3 = 1/2 x -92kJ x  -330kJ

ΔH3 = -376 kJ

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Answer:

D

Explanation:

its just right

Answer:Reactants combine to form Products. Hope this helped! ;)

Explanation:

Answer:

40.002

Explanation:

The percent composition of carbon in acetic acid is 40.002%

The mass percentage of the carbon in the compound C₂H₄O₂ is 40.00 %.

The percentage of any element in a given compound is the number of parts by mass of that element present in 100 parts by mass of the given compound.

The mass percentage of an element can be calculated in two steps:

First, calculate the molecular mass of the compound by the addition of the atomic masses of the elements. Then, the percentage of the elements by dividing the total mass of the element present in the compound by the molar mass of the compound multiplied by 100.

Given, the molecular formula of the given compound is C₂H₄O₂. The atomic mass of carbon, hydrogen, and oxygen is 12.011 g, 1.0079 g, and 15.999g respectively.

The molecular mass of the compound =  2(12.011) + 4(1.0079) + 2(15.999)

                                                                = 60.052 g

The mass percentage of the carbon = (24.022/60.052) × 100 = 40.001%

Therefore, the mass percentage of the carbon is equal to 40.00%.

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Answer:

Temperature is the awnser

Answer:

Explanation:

4,5 diethyl-2 fluoro-3-methylheptanal

Answer:

History of composition

Years Material Weight (grains)

1944–1946 gilding metal (95% copper, 5% zinc) 48 grains

1947–1962 bronze (95% copper, 5% tin and zinc) 48 grains

1962 – September 1982 gilding metal (95% copper, 5% zinc) 48 grains

October 1982 – present copper-plated zinc (97.5% zinc, 2.5% copper) 38.6 grains

Answer:

Explanation:    

Bromoethane and aqueous KOH reaction:

When a bromoethane is treated with aqueous KOH, one of the products of the reaction is a primary alcohol, ethanol.

The reaction:

CH3CH3Br + KOH (aq) ==> CH3CH2OH + KBr

If the diameters of every planet in our solar system are added together, the sum still be less than the diameter of the sun. This means that the sun is far larger than all the planets put together.

The solar system is made up of the sun and the planets. The sun lies at the center of the solar system surrounded by all the planets.

The planets that constitute the solar system vary in size and diameter. However, if we add the diameters of all the planets in our solar system together, the sum can not equal the diameter of the sun.

This is because the sun is far larger than all the planets put together.

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