Which of the following is an empirical formula?
H6O2
H402
H2O
H2O2

Answer: Wowwwww

Explanation:yes

a. Perchloric acid is a strong acid and completely dissociates into hydrogen ions and perchlorate ions  

b. Cesium hydroxide is a strong base and completely dissociates into cesium ions and hydroxide ions

c. Ammonia is a weak base and partially dissociates in water to form ammonium ions and hydroxide ions

a. Perchloric acid dissociates completely in water to form hydrogen ions  and perchlorate ions:

HClO₄ (aq) → H⁺ (aq) + ClO₄⁻ (aq)

b. Cesium hydroxide dissociates completely in water to form cesium ions and hydroxide ions:

CsOH (aq) → Cs⁺ (aq) + OH⁻ (aq)

c. Ammonia reacts with water to form ammonium ions and hydroxide ions  through partial dissociation:

NH₃ (aq) + H₂O (l) ⇌ NH₄⁺ (aq) + OH⁻ (aq)

In this reaction, some ammonia molecules remain intact while others donate a proton to a water molecule to form ammonium ions and hydroxide ions.

Learn more about complete dissociation here:

brainly.com/question/1408898

#SPJ11

The equilibrium constant, K, is a value that indicates the extent to which a reaction will proceed towards products at equilibrium.

If the value of K is greater than 1, it means that the products are favored at equilibrium, indicating that the reaction will proceed more towards products. On the other hand, if the value of K is less than 1, it means that the reactants are favored at equilibrium, indicating that the reaction will proceed more towards reactants.
To determine whether the value of K is greater than 1 or less than 1 for a specific reaction, we need to look at the balanced chemical equation for the reaction and calculate the equilibrium constant using the concentrations or pressures of the reactants and products at equilibrium. Without knowing the specific reaction, we cannot provide a definitive answer.

To determine if the value of the equilibrium constant, K, for the reaction is greater than 1 or less than 1, you need to consider the relationship between the concentrations of products and reactants at equilibrium. The equilibrium constant, K, is defined as the ratio of the concentrations of products to the concentrations of reactants, raised to the power of their respective stoichiometric coefficients.
If K > 1, it indicates that the concentration of products is greater than the concentration of reactants at equilibrium, meaning the reaction favors the formation of products.
If K < 1, it indicates that the concentration of reactants is greater than the concentration of products at equilibrium, meaning the reaction favors the formation of reactants.
In order to justify the value of K for the given reaction, you would need the equilibrium concentrations of the products and reactants or other information that allows you to determine the ratio of product concentrations to reactant concentrations at equilibrium.

Visit here to learn more about  equilibrium constant:

brainly.com/question/10038290

#SPJ11

The LD50 (Lethal Dose 50) is a measure used in toxicology to determine the lethal dose of a substance that would cause death in 50% of the test population.

However, it is important to note that conducting experiments to determine the LD50 of a substance on humans is unethical and illegal. The LD50 values are typically determined through animal testing, usually on rodents such as rats or mice.To calculate the amount of a substance that would harm a person of a certain weight, various factors need to be considered, including the toxicity of the substance and the individual's weight. In toxicology, a commonly used measure is the oral median lethal dose (LD50) expressed as milligrams per kilogram of body weight (mg/kg).To estimate the harmful dose for an individual of a certain weight, you would need to know the LD50 value of the substance and apply it to the weight of the person. The calculation involves multiplying the LD50 value by the person's weight in kilograms. However, it is crucial to emphasize that estimating harmful doses for humans based on animal LD50 values alone can be inaccurate and potentially dangerous.

It is essential to consult professionals in toxicology or poison control centers to obtain accurate information regarding the toxicity of a substance and its potential effects on human health.

for such more questions on substance

https://brainly.com/question/29108029

#SPJ8

B) Surfactant is a phospholipid molecule that prevents alveoli from collapsing. It reduces surface tension in the lungs, allowing the alveoli to remain open and facilitating efficient breathing.

Phospholipid molecules that prevent the alveoli from collapsing are known as surfactants. Surfactant is a substance composed of phospholipids, proteins, and other components. It is produced by specialized cells in the lungs called type II alveolar cells.

The primary function of surfactant is to reduce the surface tension within the alveoli, which are tiny air sacs in the lungs where gas exchange takes place. Without surfactant, the surface tension would be too high, causing the alveoli to collapse during exhalation. Surfactant molecules disrupt the cohesive forces between water molecules on the alveolar surface, allowing the alveoli to remain open and preventing them from sticking together. The presence of surfactant is crucial for efficient breathing and maintaining lung function. In conditions where surfactant production is reduced or absent, such as in premature infants or certain lung diseases, respiratory distress syndrome and other breathing difficulties can occur.

learn more about phospholipid here:

https://brainly.com/question/20561742

#SPJ11

The mass of  silver chloride (AgCl) required is 390mg when it contains 56.34 % ag by mass and 165 micrograms of Ag.

Given silver chloride contains (p1) = 56.34 % ag by mass

Then, 1 mole of AgCl contains 0.5634 moles of Ag

1 mole of Ag is obtained from 1/0.5634 mole of AgCl

The mass of silver (Ag) = m = 165mg = 165 x 10^-6g

The atomic mass of silver (M) = 107g/mole

Then the number of moles of Ag required (n) = 165/107 = 0.00154mole

Now 0.00154 mole of Ag is obtained from = 0.00154/0.5634 = 0.00273 moles of AgCl.

The molar mass of AgCl = 143g/mole

mass of AgCl required = moles x molar mass = 0.00273 x 143 = 0.390g

Hence the mass of AgCl required is 390mg

To learn more about AgCl click here https://brainly.com/question/17102479

#SPJ4

Answer:

Divide; mass.

Explanation:

The acceleration of an object is equal to the net force exerted on the object divided the object's mass. This theory is known as Newton's second law of motion.

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

\( F = ma\)

Where;

F represents force.

m represents the mass of an object.

a represents acceleration.

Making acceleration (a) the subject, we have;

\(Acceleration (a) = \frac{F}{m}\)

Therefore, the acceleration of an object is equal to the net force exerted on the object divided the object's mass.

The acceleration of an object is equal to the net force exerted on the object divided by the object's mass.

The net force applied to an item divided by its mass gives the object's acceleration.

To put it another way, the equation that connects mass (m), net force (\(F_{net\)), and acceleration (a) is:

a = \(F_{net\) / m

This equation is derived from Newton's second rule of motion, which states that an object's acceleration is inversely proportional to its mass and directly proportional to the net force acting on it.

Thus, it shows that an item accelerates more quickly the more net force that is applied to it, and that an object accelerates more quickly the more mass that is added to it.

For more details regarding acceleration, visit:

https://brainly.com/question/2303856

#SPJ6

What elements forms electron rich hydride?

Formula of Calgon is

The elements which form electron-rich hydride are when the elements from groups 15-17 combine together to form compounds

The formula of Calgon is \(Na6O18P6\)

This refers to the pure substance which contains atoms with the same number of protons in their shell.

Hence, we can note in order to form an electron-rich hydride, it is important to make use of elements from groups 15-17 so that they would combine and form compounds.

Read more about hydride here:
https://brainly.com/question/8376431

Answer:

the forces i think

Explanation:

The absorption of a free moving neutron by the atoms nucleus

(A P E X)

Answer:

sidjnfjdueirb sidisjsiwijejdkdodif

Answer:

Give a brief question

Not an awful question

Answer:

ok, here is your answer

Explanation:

The value of K b for hydrogen sulfite, HSO3-, is not provided in the question. However, the options given are different values of K b for different compounds.

So, the correct answer is: Not enough information is given in the question to determine the value of K b for hydrogen sulfite, HSO3-.

Answer:

The amount left after 49.2 years is 3mg.

Explanation:

Given data:

Half life of tritium = 12.3 years

Total mass pf tritium = 48.0 mg

Mass remain after 49.2 years = ?

Solution:

First of all we will calculate the number of half lives.

Number of half lives = T elapsed/ half life

Number of half lives =  49.2 years /12.3 years

Number of half lives =  4

Now we will calculate the amount left after 49.2 years.

At time zero 48.0 mg

At first half life = 48.0mg/2 = 24 mg

At second half life = 24mg/2 = 12 mg

At 3rd half life = 12 mg/2 = 6 mg

At 4th half life =  6mg/2 = 3mg

The amount left after 49.2 years is 3mg.

The volume of the sugar solution in the beaker is 0.5 liters.

The question at hand involves finding the volume of a sugar solution that has a concentration of 4 grams per liter when the total amount of sugar in the beaker is 2 grams.

Here is the solution:Let V be the volume of the sugar solution in the beaker. The concentration of sugar is 4 grams/liter. Thus, the total amount of sugar in V liters of the sugar solution is 4V grams of sugar. The problem states that the total amount of sugar in the beaker is 2 grams.

Therefore:4V = 2V = 2/4 = 0.5 liters. Therefore, the volume of the sugar solution in the beaker is 0.5 liters.

:The volume of the sugar solution in the beaker is 0.5 liters.

To know more about sugar solution visit:

brainly.com/question/2632762

#SPJ11

Answer:

2KClO3 = 2KCl + 3O2

I hope it's helps you

the method that will usually cause a reaction to speed up from the list given is: Reducing the concentration of reactants.

Reaction can be defined as the combination of substances or a process where substances acts on each other, where substances changes into different substances.

A reaction can be said to be the event that causes a restructuring or rearrangement of atoms of a substance when it is in contact with another substance.

In conclusion, the method that will usually cause a reaction to speed up from the list given is Reducing the concentration of reactants.

Learn more about Reaction: https://brainly.com/question/26018275

#SPJ2

1.2 grams of Barium Chloride (BaCl₂) are needed to make 220 mL of 0.040 M solution.

To determine the amount of grams of Barium Chloride (BaCl₂) needed to compound a 220 mL 0.040 M solution, we can implement the following formula:

mass (in grams) = molarity × volume (in liters) × molar mass

convert the volume of the mixture from milliliters (mL) to litres (L):

220 mL =  0.220 L by : 220/1000

The molar mass of BaCl₂ is 137.33 g/mo

Therefore, when utilizing the equation above, we can deduce that:

mass = 0.040 mol/L × 0.220 L × 137.33 g/mol = 1.2 g

Learn more about Barium Chloride at

https://brainly.com/question/29519054

#SPJ1

Answer:

Answer: The mass of product left in the test tube will be less than the initial measured mass of the reactants.

Explanation: This is because one of the products of the reaction is a gas (hydrogen) and it escapes as the reaction happens in an open system.

This is the reaction,

Mg(s) + 2HCl(aq) --------> MgCl2(aq) + H2(g)

So, evidently, only MgCl2 is left in the reaction test tube together with unreacted reactants.

But, the hydrogen gas that escapes accounts for the lesser mass at the end of the reaction.

The mass in the test tube at the end of the reaction +

the mass of Hydrogen gas that escapes = the mass of reactants before the reaction; consolidating the law of conservation of mass.

In order to determine the pH in the given scenarios, several calculations and considerations need to be taken into account.Firstly, the Henderson-Hasselbalch equation can be used, which relates the pH of a solution to the pKa of the acid and the ratio of its conjugate base to the acid. This equation is pH = pKa + log([A-]/[HA]), where [A-] is the concentration of the conjugate base and [HA] is the concentration of the acid.

The first problem asks for the pH of a solution made by mixing 0.20 mol of acid HA with 0.30 mol of its conjugate base NaA. The pH can be calculated using the Henderson-Hasselbalch equation, pH = pKa + log([A-]/[HA]). Given that the pKa is 6, we can plug in the values and solve for the pH.

The second problem asks for the pH after adding 0.05 mol of NaOH to the previous solution. Since NaOH is a strong base, it will react with the acid HA and form water.

The amount of NaOH added is small compared to the amount of acid, so we can assume that the acid will be fully neutralized. We can calculate the resulting concentration of the acid and its conjugate base and use the Henderson-Hasselbalch equation to find the new pH.

The third problem involves mixing 200 mL of 0.20 M HA with 300 mL of 0.30 M NaA. We need to calculate the concentrations of the acid and its conjugate base after mixing, and then use the Henderson-Hasselbalch equation to find the pH.

The fourth problem asks for the pH after adding 10 mL of 0.50 M HCl to the previous solution. Since HCl is a strong acid, it will completely dissociate and increase the concentration of the acid HA.

We need to calculate the new concentrations of the acid and its conjugate base and use the Henderson-Hasselbalch equation to find the new pH.

Learn more about pH of a solution

brainly.com/question/3020720

#SPJ11

Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

To know more about temperature  visit:

https://brainly.com/question/7510619

#SPJ11

Answer:

A scientific experiment is a carefully organized procedure in which the scientist intervenes in a system to change something

Explanation:

Answer:

mass = 0.00000043189g

The combination of aqueous solutions that should produce a precipitate is when a solution of sodium chloride (NaCl) is mixed with a solution of silver nitrate (AgNO₃). This will result in the formation of a white precipitate of silver chloride (AgCl).

A precipitate is a solid that forms in a solution when two or more aqueous solutions are mixed together. The formation of a precipitate occurs when the cations and anions in the two solutions react to form an insoluble compound. In the case of mixing a solution of sodium chloride with a solution of silver nitrate, the cation in the sodium chloride solution is Na⁺ and the anion is Cl⁻.

The cation in the silver nitrate solution is Ag⁺ and the anion is NO₃⁻. When these two solutions are mixed together, the Ag⁺ ions combine with the Cl- ions to form a solid precipitate of AgCl, which is insoluble in water. This reaction is represented by the following equation:

NaCl(aq) + AgNO₃(aq) → AgCl(s) + NaNO₃(aq)

Therefore, mixing a solution of sodium chloride with a solution of silver nitrate should produce a precipitate of silver chloride.

To know more about the Aqueous solution, here

https://brainly.com/question/31529988

#SPJ1

Answer:

72264x10²³moles

Explanation:

By Avogadro constant one mole of a substance is equal to 6022x10²³. so 12 hydrogen atoms =

12×6022x10²³=72264x10²³ moles.

Answer:

Atom

Explanation:

Answer:

atom

Explanation:

oof its atom but i need 2p characters

a) The collision frequency of dimethyl ether can be calculated using the kinetic theory of gases. The collision frequency is given by the equation:

\(\[\text{{Collision frequency}} = \frac{1}{4} \sqrt{\frac{8 \cdot k \cdot T}{\pi \cdot m}}\]\)

where k is the Boltzmann constant, T is the temperature in Kelvin, and m is the mass of dimethyl ether molecule. Given that the angle-averaged radius of dimethyl ether is 0.25 nm, we can calculate the mass of the molecule using its density or molar mass.

b) To calculate the decomposition rate constant of (CH3)2CO, we need additional information such as the reaction mechanism and reaction conditions. The rate constant for a chemical reaction depends on factors like temperature, activation energy, and the presence of catalysts. Without these details, it is not possible to calculate the decomposition rate constant accurately.

In conclusion, the collision frequency of dimethyl ether at a specific temperature can be calculated using the kinetic theory of gases. However, to calculate the decomposition rate constant of (CH3)2CO, additional information about the reaction conditions and mechanism is needed.

To know more about Molar Mass visit-

brainly.com/question/31545539

#SPJ11

False. wood to energy source can release carbon dioxide when it is burned.so it can be considered as a renewable energy source.

Burning wood can release lots of carbon dioxide comparatively to other fossil fuels. plants and trees are considered as renewable energy source. because when it is cut again it grows. its is less dense energy source. Many solar power plants can convert carbon dioxide into fuels. and it can be recycle to other chemicals. Renewable energy emits between 11 to 750 g of carbon dioxide. As long as trees planted its a great source of renewable energy source. This also have many other environmental benefits.

To learn more about Renewable energy please visit:

https://brainly.com/question/79953

#SPJ4

Answer:

The largest of the volcanoes in the Tharsis Montes region, as well as all known volcanoes in the solar system, is Olympus Mons. Olympus Mons is a shield volcano 624 km (374 mi) in diameter (approximately the same size as the state of Arizona), 25 km (16 mi) high, and is rimmed by a 6 km (4 mi) high scarp.

Explanation:

The correct option is (-57.39 kJ) is the answer to delta G.(-61.37 kJ) is the answer to delta H.(10.68 K/J) is the answer to delta S.

Given data:

Mass of benzene = 100.0 g

Mass of toluene = 100 g

Total mass of solution, mt = 200 g

The mole fraction of benzene, x1 = moles of benzene / total moles

The mole fraction of toluene, x2 = moles of toluene / total moles

The total moles of the solution = (mass of benzene/ molar mass of benzene) + (mass of toluene/ molar mass of toluene) = (100/78.11) + (100/92.14) = 2.558 + 1.086 = 3.644 molesx1 = 2.558/3.644 = 0.7023x2 = 1.086/3.644 = 0.2977(a) Delta S = ΔS°mix= -R[x1lnx1+x2lnx2]= -8.314[0.7023

ln(0.7023)+0.2977ln(0.2977)]ΔS°mix= 10.68 K/J(b) Delta H = ΔH°mix = ΔH°fus(benzene) + ΔH°fus(toluene) = 9.91 kJ/mol + 6.93 kJ/mol = 16.84 kJ/mol

ΔH°mix = ΔH°mix x n = -16.84 kJ/mol x 3.644 mol = -61.37 kJ

(c) Delta G = ΔG°mix = RTln(x1/x2) = 8.314 x (293.15) ln(0.7023/0.2977)

ΔG°mix = -31.68 J/molΔG°mix = ΔH°mix - TΔS°mixΔG°mix = (-61.37 x 10³) - (-3.98 x 10³)ΔG°mix = -57.39 x 10³ J/mol= -57.39 kJ/mol= -57.39 kJ

As you can see, ΔG°mix = -57.39 kJ/mol.

Therefore, the correct option is (-57.39 kJ) is the answer to delta G.(-61.37 kJ) is the answer to delta H.(10.68 K/J) is the answer to delta S.

Learn more about delta with the given link,

https://brainly.com/question/908390

#SPJ11