In which of the following compounds does iron have the lowest oxidation number?

A. All are equal
B. Fe(OH)2
C. Fe(OH)3
D. FeOH

A superacid is an exceptionally strong acid characterized by its ability to donate protons (H⁺ ions) effectively. It surpasses the acidity of common acids such as sulfuric acid or hydrochloric acid.

Superacids have extremely low values of pH and can even protonate compounds considered unreactive by normal acids.Superacidity arises from the presence of highly electronegative and superacidic counterions, such as fluorosulfonic acid (HSO₃F). These counterions stabilize the conjugate base of the acid, making it highly acidic.

Superacids are rarer than standard acids primarily due to their extreme reactivity. The conditions required to create and maintain superacidity are often hazardous and challenging to handle.

Superacids are typically produced by mixing a strong acid with a strong Lewis acid, such as antimony pentafluoride (SbF₅). The scarcity of suitable counterions and the difficulties in handling these highly reactive substances contribute to the rarity of superacids.

For more such questions on superacid

https://brainly.com/question/31410151

#SPJ11

The type of compound represented by the graph at right is a strong acid (option B).

An acid is generally any compound capable of dissociating into its respective constituent ions when in an aqueous solution.

An acid is categorised as strong or weak depending on whether it can dissociate completely or partially. A strong acid dissociates completely in water.

According to this question, HA, when added to water, dissociates into H+ and A- ions, hence, is a strong acid.

Learn more about strong acid at: https://brainly.com/question/29769012

#SPJ1

46.27 cubic feet  soil are needed to fill the flower box

Given Data

Length of Box = 5.40 feet

Width of Box =  9.52 feet

Depth of Box = 0.9 feet

Let us find the volume of the box

The volume can be found be using the expression below

Volume = L*W*D

Substitute the given data into the expression we have

Volume = 5.40*9.52*0.9

Volume = 46.27 cubic feet

Learn more about Volume here:

https://brainly.com/question/21092361

#SPJ1

Answer:

Hydrogen fuel cells do not produce any CO2 emissions during operation, even if their production is not necessarily carbon-free. This gives them an advantage over combustion engine vehicles, which can emit small amounts of poisonous carbon monoxide and require well-ventilated rooms for indoor use.

Answer:

−26.4 kcal

Explanation:

According to Hess's law, the total heat changes occuring during a chemical reaction are independent of path.

2CO(g)+O

2

(g)⟶2CO

2

(g)N ,

ΔH=−135.2 kcal

The above reaction is reversed and halved, we get-

CO

2

(g)⟶CO+

2

1

O

2

(g)

ΔH=

2

135.2

kcal ....(i)

C+O

2

(g)⟶CO

2

(g)

ΔH= -94 kcal ...(ii)

Required equation

C(s)+

2

1

O

2

(g)⟶CO(g);

Adding Eqs. (i) and (ii), we get

C(s)+

2

1

O

2

(g)⟶CO(g),

ΔH =

2

135.2

−94=−26.4 kcal

The conversions that could be performed with these two conversion factors alone, Density—> molar mass or/formula mass—> is volume ---> moles; option D

Conversion factors are expressions or values which are used to convert from one unit or value to another.

The conversion factor given is:

Density—> molar mass or/formula mass—>

volume = density/mass

moles = mass/molar mass

Volume to moles = density/mass -->  mass/ molar mass

Volume to moles = density ---> molar mass or formula mass

The conversion of volume to moles will therefore require density and molar mass or formula.

In conclusion, conversion factors are used to convert from one unit  value to another.

Learn more about conversion factor at: https://brainly.com/question/24545553

#SPJ1

Answer:

Of course I breathe air.

Explanation:

I'm not a fish.

Answer:

\(ummmmmmm \: yes \: \)

Answer:

d. End product is that product with a ketone and carboxylic acid.

Explanation:

\({ \sf{NaBH_{4} : }}\)

Sodium borohydride is a reducing agent, it reduces the ketone to a primary alcohol.

\({ \sf{H _{2} O \: and \: H {}^{ + } }}\)

Then acidified water is an oxidising mixture which reverses the reduction reaction.

Explanation:

Option D is your answer

Hope it helps

Answer:

B. rate = K[A]²

Explanation:

In a second-order reaction, the rate of the reaction is proportional to the square of the concentration of a single reactant (denoted as [A]), which is represented by the squared term [A]².

This expression signifies that the reaction rate increases exponentially with the concentration of reactant A.

The rate constant K determines the specific rate of the reaction. Option B correctly represents this relationship for a second-order reaction. Option C, which includes the concentration of a second reactant (denoted as [B]), does not accurately represent a second-order reaction.

Hope this helps!

The partial pressure of nitrogen gas is 0.95 atm and the new volume of the gas at STP would be 24.8 mL.

a. To find the partial pressure of nitrogen gas, we need to subtract the vapor pressure of water from the total pressure. As per Dalton's law, the total pressure is the sum of all the partial pressures of the gases. So, we have,

Partial pressure of nitrogen gas = Total pressure - Vapor pressure of water

Partial pressure of nitrogen gas = 0.98 atm - 0.03 atm

Partial pressure of nitrogen gas = 0.95 atm

Therefore, the partial pressure of nitrogen gas is 0.95 atm.

b. To find the new volume of the gas at STP, we can use the combined gas law, which relates the pressure, volume, and temperature of a gas. The combined gas law is given by,

(P₁V₁)/T₁ = (P₂V₂)/T₂,  initial pressure is P₁, volume is V₁, temperature is T₁, final pressure is P₂, volume is V₂, and temperature is T₂. At STP, the pressure is 1 atm and the temperature is 273 K. Solving for V₂, we get,

V₂ = (0.95 atm * 30.0 mL * 273 K) / (297 K * 1 atm)

V₂ = 24.8 mL (rounded to two significant figures)

Therefore, the new volume of the gas at STP would be 24.8 mL.

To know more about combined gas law, visit,

https://brainly.com/question/13154969

#SPJ1

The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

Learn more about heat energy:

https://brainly.com/question/31429264

#SPJ1

Answer:

Electrons

Electric charge is carried by subatomic particles such as electrons and protons, which can be created and destroyed. For example, when particles are destroyed, equal numbers of positive and negative charges are destroyed, keeping the net amount of charge unchanged.

The initial pH before any titrant is added is 13.46 after adding 5 ml of the titrant is 13.0669.

Titration is a common laboratory technique of quantitative chemical evaluation to decide the attention of a recognized analyte. A reagent, termed the titrant or titrator, is ready as a fashionable answer of regarded concentration and quantity.

1)when 0.0 mL of HBr is added

Given:

M(HBr) = 0.75 M

V(HBr) = 0 mL

M(LiOH) = 0.29 M

V(LiOH) = 25 mL

 mol(HBr) = M(HBr) * V(HBr)

mol(HBr) = 0.75 M * 0 mL = 0 mmol

mol(LiOH) = M(LiOH) * V(LiOH)

mol(LiOH) = 0.29 M * 25 mL = 7.25 mmol

So, we have,

mol(HBr) = 0 mmol

mol(LiOH) = 7.25 mmol

0 mmol of both will react

remaining mol of LiOH = 7.25 mmol

Total volume = 25.0 mL

[OH-]= mol of base remaining / volume

[OH-] = 7.25 mmol/25.0 mL

         = 0.29 M

For pH

pOH = -log [OH-]

     = -log (0.29)

     = 0.5376

PH = 14 - pOH

     = 14 - 0.5376

      = 13.46

2)when 5.0 mL of HBr is added

Given:

M(HBr) = 0.75 M

V(HBr) = 5 mL

M(LiOH) = 0.29 M

V(LiOH) = 25 mL

mol(HBr) = M(HBr) * V(HBr)

mol(HBr) = 0.75 M * 5 mL = 3.75 mmol

mol(LiOH) = M(LiOH) * V(LiOH)

mol(LiOH) = 0.29 M * 25 mL = 7.25 mmol

Now, we have

mol(HBr) = 3.75 mmol

mol(LiOH) = 7.25 mmol

3.75 mmol of both will react

remaining mol of LiOH = 3.5 mmol

Total volume = 30.0 mL

[OH-]= mol of base remaining / volume

[OH-] = 3.5 mmol/30.0 mL

         = 0.1167 M

calculating pH;

pOH = -log [OH-]

= -log (0.1167)

= 0.9331

PH = 14 - pOH

= 14 - 0.9331

= 13.0669

Titration is a way wherein an answer of acknowledged concentration is used to determine the awareness of an unknown answer. typically, the titrant is added from a buret to a recognized amount of the analyte until the response is complete.

Learn more about titration here:- https://brainly.com/question/186765

#SPJ1

Answer:

option C is correct = 1.14 × 10²² molecules of  CO₂

Explanation:

Given data:

Number of moles of CO₂ = 0.0189 mol

Number of molecules = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

For given question:

1 mole of CO₂ =  6.022 × 10²³ molecules of  CO₂

0.0189 mol of CO₂ ×  6.022 × 10²³ molecules of  CO₂ / 1mol

1.14 × 10²² molecules of  CO₂

Thus, option C is correct.

Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

For more such questions on glucose visit:

https://brainly.com/question/397060

#SPJ8

Answer: 261.5 g of fluorine was released into the air in 6 month

Explanation:

The atomic mass of the compound is 158g

fluorine makes up 24.0% of this compound.

over the 6-month period, 1089 g of this compound is leaked (# weeks x 45.38g)

Better temperatures can growth the quantity of water vapor withinside the air, that could growth the probability of precipitation.

Different factors, inclusive of air pressure, wind, and atmospheric instability, additionally play a function withinside the formation of rain, and the connection among temperature and precipitation may be complicated. The temperature of atmospheric gases could have a substantial effect at the manufacturing of rain. The environment is a complicated device that performs a vital function with inside the Earth`s water cycle, which incorporates the system of precipitation, inclusive of rain. Precipitation takes place while water vapor with inside the air condenses into liquid droplets or ice crystals, which fall to the floor as rain, snow, or hail. The temperature of the environment impacts the quantity of water vapor that the air can preserve. As temperature increases, the air can preserve extra water vapor, that could cause better tiers of humidity. When the air will become saturated with water vapor, it reaches its dew point, and the extra water vapor condenses into liquid droplets or ice crystals, that could shape clouds and subsequently precipitation. In addition, international warming, that's inflicting an growth in atmospheric temperatures, can cause modifications in precipitation styles and extra severe climate events. Understanding the connection among temperature and precipitation is vital for predicting and mitigating the affects of weather change.

For such more questions on precipitation

https://brainly.com/question/20469884

#SPJ11

Answer:

f a runner decreases his velocity from +20 m/s to +10 m/s, with average acceleration is -5m/s².

Explanation:

Answer:

\(\sf\fbox\red{Answer:-}\)

Vitamin A is a fat-soluble vitamin and an essential nutrient for humans. It is a group of organic compounds that includes retinol, retinal (also known as retinaldehyde), retinoic acid, and several provitamin A carotenoids (most notably beta-carotene (β-carotene).

\(\small\fbox{\blue{\underline{mαrk \; mє \; вrαínlíєѕt \; plєαѕє ♥}}}\)

Answer:

36.2 K

Explanation:

Step 1: Given data

Step 2: Convert T₁ to Kelvin

We will use the following expression.

K = °C +273.15

K = 38 °C +273.15 = 311 K

Step 3: Calculate T₂

We will use Gay Lussac's law.

P₁/T₁ = P₂/T₂

T₂ = P₂ × T₁/P₁

T₂ = 1.0 atm × 311 K/8.6 atm = 36.2 K

Answer:

P₄(l) + 5 O₂(g) + 6 H₂O(l) ⇒ 4 H₃PO₄(aq)

Explanation:

Phosphoric acid is synthesized using a two-step thermal process.

In the first step, phosphorus and oxygen react to form diphosphorus pentoxide. The corresponding chemical equation is:

P₄(l) + 5 O₂(g) ⇒ 2 P₂O₅(g)

In the second step, diphosphorus pentoxide and water react to form phosphoric acid. The corresponding chemical equation is:

P₂O₅(g) + 3 H₂O(l) ⇒ 2 H₃PO₄(aq)

We can get the net chemical equation by adding the first step, the second step multiplied by 2, and canceling what is repeated on both sides.

P₄(l) + 5 O₂(g) + 2 P₂O₅(g) + 6 H₂O(l) ⇒ 2 P₂O₅(g) + 4 H₃PO₄(aq)

P₄(l) + 5 O₂(g) + 6 H₂O(l) ⇒ 4 H₃PO₄(aq)

Answer:

true

Explanation:

Answer: True

Explanation:

I took the test :D

Photosynthesis is a chemical reaction in which energy from sunlight is used to convert carbon dioxide and water into glucose and oxygen. This process occurs in the chloroplasts of plant cells and is essential for the survival of plants, as well as for many other organisms that depend on plants for food.

The heat energy required to raise the temperature of the vapor q_total = q1 + q2 = 25.76 kJ + 84.39 J = 26.85 kJ.

The heat energy required to convert 66.3 g of liquid SO2 at 201.2 K to gaseous SO2 at 263.1 K is 26.85 kJ.

To solve this problem, we need to calculate the heat energy required to vaporize the given mass of liquid SO2 at its boiling point and then raise the temperature of the resulting vapor to the desired final temperature. The heat energy required for vaporization can be calculated using the molar heat of vaporization of SO2, which is given as 24.9 kJ/mol. The heat energy required to raise the temperature of the vapor can be calculated using the specific heat capacity of liquid SO2, which is given as 1.36 J/g K.

First, we need to calculate the number of moles of SO2 in 66.3 g of liquid SO2 using its molar mass. The molar mass of SO2 is 64.06 g/mol, so:

n = m/M = 66.3 g / 64.06 g/mol = 1.034 mol

The heat energy required for vaporization is then:

q1 = ΔHvap * n = 24.9 kJ/mol * 1.034 mol = 25.76 kJ

Next, we need to calculate the heat energy required to raise the temperature of the resulting vapor from 201.2 K to 263.1 K. The specific heat capacity of liquid SO2 is used because we are raising the temperature of the vapor from the boiling point of liquid SO2.

q2 = n * C * ΔT = 1.034 mol * 1.36 J/g K * (263.1 K - 201.2 K) = 84.39

The total heat energy required is the sum of the heat energy required for vaporization and the heat energy required to raise the temperature of the vapor:

q_total = q1 + q2 = 25.76 kJ + 84.39 J = 26.85 kJ

Therefore, the heat energy required to convert 66.3 g of liquid SO2 at 201.2 K to gaseous SO2 at 263.1 K is 26.85 kJ.

For more such questions on heat energy

https://brainly.com/question/17104382

#SPJ11

Answer:

The pH of the solution is 6.17.

Explanation:

To find the pH of the solution, we have to first calculate its pOH using the formula:

\(\boxed{\mathrm{pOH = - log_{10}[OH^-]}}\)

Substituting the given value of [OH⁻] into the formula, we get:

\(\mathrm{pOH = -log_{10}(1.49 \times 10^{-8})}\)

        \(= \bf 7.83\)

Now that we have the value of the pOH of the solution, we can find its pH using the following formula:

\(\boxed{\mathrm{pH + pOH = 14}}\)

∴ \(\mathrm{pH} + 7.83 = 14\)

⇒ \(\mathrm{pH } = 14 - 7.83\)

⇒ \(\mathrm{pH } = \bf 6.17\)

Salts are heated to extremely high temperatures during a display of fireworks. The salts' ions pick up energy and get excited. Exciting hues are created as energy in the form of light is emitted from the ions. Each salt's metal ion can be identified by the hue of the light that is emitted.

Subatomic particles refer to the three fundamental particles that make up the atom.

The subatomic particles include:

Electrons occupy several energy states. When electrons gain energy, they move to a higher energy state. The electrons on returning to a lower energy state emit radiation that is seen as several light color displays in fireworks.

Lear more about subatomic particles at: https://brainly.com/question/16847839

#SPJ1

Answer:

thete are 672 seeds in 14 kg

The half-life constant of a first order reaction is 12 minutes. if the initial concentration of reactant is 0.352M, it takes 12 minutes for it to decrease to 0.176M

The duration it takes for half of the radioactive atoms in a sample to decay is known as the half-life in the context of radioactive decay. Because they are unstable, radioactive substances spontaneously undergo radioactive decay, changing over time into new elements or isotopes.

A radioactive substance's half-life is one of its distinctive characteristics. For instance, if the half-life of a radioactive isotope is one hour, half of the initial quantity would have degraded after one hour, half of the remaining quantity would have degraded after another hour, and so on.

The duration it takes for the concentration of a reactant to reduce by half in a first-order reaction is known as the half-life in the context of chemical reactions.

Learn more on radioactive decay here https://brainly.com/question/1236735

#SPJ1

Answer:

True

Explanation:

Answer:

Coal Is A Combustible Black Or Brownish Black Sedimentary Rock With A High Amount Of Carbon And Hydrocarbons. Coal is Classified As As A Nonrenewable Coal Energy Source Necause It Takes Millions Of Years To Form .Coal Contain The Energy Stored By Plant That Lives Hundreds Of Millions Of Year Ago In Swamphy Forests .