The Kp for the reaction A (g) = 2 B (g) is 0.0380. What is Kp for the reaction 4 B (g) = 2 A (g)?​

The flash of green light 525 nm that contains 189kJ of total energy is  2.39 ×10^29 photons.

The formula below gives the energy EE of a single photon of wavelength lambda.

E = hc/λ, where c is the speed of light and h is the plank constant, with a value of 6.62607015 ×10^34.

To determine the overall number of photons n in a green light flash (525 mm) with a total energy of 189 kJ.

We'll apply the following formula.

n= Et/ E

When we enter the given values into the formula, we see that n= Et/E.

= \(\frac{189 *10^3}{6.62607015 *10^−34 × 3*10^8}/ 525 *10^-3\)

Therefore, there are 2.39 ×10^29 photons in a green light with 189 kJ of energy.

For more information on photons kindly visit to

https://brainly.com/question/20912241

#SPJ1

​

​

Answer:

jbfnuebufubdbybefydbybdruubedbusbubedbufyubrfybrfbyfrybburuefubfburbufbu

Explanation:

jbfwbyeybfybefbueujdhyevfbyrcybyebcybrcybybcrybeyfybrfybfrybrgyb

Answer:

Just one valence so Cs*

Explanation:

Cs*

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

MARK BRAINLIEST

answer: what

explanation: what

Answer:

The answer is A

Explanation:

Answer:

1. bond in the molecule on the right

Explanation:

CH3CH2-OH

The compound above is an alcohol due to the presence of the OH bond. The wave number of the C - O bond is given as; 1050-1150 cm^-1.

CH3CH__O

The compound above is an aldehyde due to the presence of the CHO bond. The wave number of the C = O  bond is given as; 1740-1720 cm^-1

Comparing both bonds, the C = O bond absorbs at a higher wave number.

Answer:

0.00000000910938;

9.109380 * 10^-9

Explanation:

Given the question :

Given :

1.602176*10-¹⁹/ 1.758820*10¹¹

The numbers are expressed in the form:

A * 10^b ; Where;

A = Coefficient ; 10 = base ; b = exponent

The Coefficients can be divided directly as :

1.602176 / 1.758820 = 0.9109380

Using the division law of indices, the exponents acn be worked out as follows since they have the same base :

10^-19 / 10^-11 = 10^(-19 - (-11)) = 10^(-19+11) = 10^-8

Thus, we have ;

0.9109380 × 10^-8

In standard form:

9.109380 * 10^-9

In Expanded form:

10^-8 = 0.00000001

0.9109380 * 0.00000001 = 0.00000000910938

0.000000009 +

0.0000000001 +

0.00000000000 +

0.000000000009 +

0.0000000000003 +

0.00000000000008

__________________

0.00000000910938

___________________

Answer: A crystalline structure has a repeating pattern called unit cell.

The question is incomplete, the complete question is;

A molecule that contains three identical polar bonds to the central atom will be ________.

nonpolar if the geometry is planar triangular

polar in all cases

nonpolar in all cases

impossible to tell the polarity

either polar or nonpolar depending on the identity of the atoms bonded to the central atom

Answer:

Nonpolar if the geometry is planar triangular

Explanation:

The polarity of molecules depends both on the polarity of individual bonds in the molecule as well as the overall dipole moment of the molecule. We must remember that dipole moment is a vector quantity hence direction of the resultant vector is very important.

Now, if i have a molecule that contains three identical polar bonds, a planar triangular geometry means that the molecule is symmetrical and will have an overall dipole moment of zero. Hence the molecule is nonpolar.

Answer:

1413.386

Explanation:

Answer:

false

Explanation:

The order of acidity of the protons that is correct is option B.

We must look into the reason  for the acidity of the hydrogen atoms if we want to get the real answer to the question that we have here. We have to note that the hydrogen atom that is closest to the place where there is an electron withdrawing group would be most acidic.

This implies that the hydrogen atom that is close to the highly electron withdrawing carboxyl group would be quite more acidic that an alkane hydrogen.

Learn more about acidic hydrogen:https://brainly.com/question/11659058

#SPJ1

The total kilojoules in two tablespoons is  836.8 kJ.

To determine the total kilojoules in two tablespoons of a substance, we need to know the specific substance and its energy content per tablespoon. Different substances have different energy values, so without this information, it is not possible to provide an accurate calculation.

The energy content of food or substances is typically measured in kilocalories (kcal) or kilojoules (kJ). 1 kilocalorie is equal to 4.184 kilojoules. The energy content of a substance is often listed on food labels or in nutritional databases.

For example, if we have the energy content of a substance as 100 kilocalories (kcal) per tablespoon, we can convert it to kilojoules by multiplying it by 4.184:

100 kcal * 4.184 kJ/kcal = 418.4 kJ

So, if we have two tablespoons of this substance, the total energy would be:

418.4 kJ/tablespoon * 2 tablespoons = 836.8 kJ

It's important to note that the energy content of a substance can vary depending on its composition, density, and other factors. Therefore, it is always recommended to refer to reliable sources such as food labels, nutritional databases, or consult a qualified professional to obtain accurate information regarding the energy content of specific substances.

For more such information on: kilojoules

https://brainly.com/question/29497478

#SPJ8

The answer is 1ml. The answer is 1ml because of calibration of this graduated cylinder

Answer:

1 mL

Explanation:

According to your definition, it is the difference between marked spaces divided by the # of spaces between marked values.

Difference between 2 marked values: 5 mL

# Of Spaces between marked values: 5

Calibration: 5 mL / 5 mL = 1 mL

The gas that has a volume of 752 mL at 1.98 atm and 62°C is most likely NO₂ (option D).

The volume of a sample of gas can be calculated using the following formula:

PV = nRT

Where;

According to this question, the volume of a sample of gas (2.49 g) was 752 mL at 1.98 atm and 62°C. The number of moles is as follows:

1.98 × 0.752 = n × 0.0821 × 335

1.489 = 27.5n

n = 0.054mol

molar mass of the gas = 2.49g ÷ 0.054mol = 45.99g/mol

The gaseous substance with the molar mass of 45.99g/mol is NO₂.

Learn more about moles at: https://brainly.com/question/27058396

#SPJ1

Answer:

Supercalifragilisticexpialidocious...

Explanation: beacause...so...yeah...

The property of water that causes polar water molecules to surround ions, reducing the likelihood of them interacting with other ions, is known as its solvation or hydration ability.

This solvation property is a result of water's high polarity, which arises from its asymmetrical molecular structure and the presence of polar covalent bonds. Water molecules have a partially positive (+) and partially negative (-) end due to the electronegativity difference between oxygen and hydrogen atoms. This polarity enables water molecules to form hydrogen bonds with other water molecules and with polar solutes, such as ions. When ions dissolve in water, the partially positive hydrogen atoms of water molecules are attracted to the negatively charged ions, and the partially negative oxygen atoms of water molecules are attracted to the positively charged ions.

Learn more about the hydrating nature of water here.

https://brainly.com/question/2709403

#SPJ1

FeCl₃ has a van't Hoff factor of 3.400. -3.858ºC is the freezing point (in °C) of an aqueous solution made with 0.4100 m FeCl₃.

A liquid's freezing point is the temperature at which it turns into a solid. Similar to the melting point, the freezing point often rises with increasing pressure. In the case of combinations and for some organic substances, such as lipids, the freezing point usually below the melting point.

The first solid that forms when a combination freezes often differs in composition from the liquid, and the development of the solid alters the constitution of the remaining water, typically lowering the freezing point gradually.

∆T = i×m×Kf

i = van't Hoff factor = 3.400

m = molality = 0.4100 m

Kf = freezing constant = 1.860º/m

∆T = (3.400)(0.4100)(1.860)

∆T = 3.858º

Freezing point = 0º - 3.858º = -3.858ºC

Therefore, -3.858ºC is the freezing point.

To learn more about freezing point, here:

brainly.com/question/30168966

#SPJ1

The balanced equation for the reaction of guanidine with water is: (NH2)2CNH (aq) + H2O (l) ⇌ (NH2)2CNH2+ (aq) + OH- (aq).

The Kb expression for this reaction is: Kb = [OH-] [(NH2)2CNH2+] / [(NH2)2CNH]

In this reaction, guanidine acts as a Brønsted-Lowry base by accepting a proton from water to form the conjugate acid (NH2)2CNH2+ and the hydroxide ion (OH-).

The Kb expression reflects the equilibrium between the reactants and products, with the concentrations of the products in the numerator and the concentration of the base in the denominator.

know more about guanidine here

https://brainly.com/question/30901805#

#SPJ11

Answer:

the degree of their disorderliness increases

The theoretical yield of Acetylsalicylic acid is found out to be: 3.01 grams.

The limiting reagent is a substance that prevents a chemical reaction from occurring completely.

When a limiting reagent is used in a chemical reaction, the atoms, molecules, or ions of the other reactant that it (the limiting reagent) reacts with will either stay free or unreacted.

Popular compounds called acids and bases interact with one another to create salt and water. The Latin word "acere," which meaning "sour," is where the term "acid" originates.

According to the problem, we have 2.31 grams of salicylic acid. We need to determine the theoretical yield of acetylsalicylic acid.

The molar mass of salicylic acid is 138.12 g/mol. Therefore, the number of moles of salicylic acid we have is:

n = mass / molar mass

n = 2.31 g / 138.12 g/mol

n = 0.0167 mol

According to the balanced equation, 1 mole of salicylic acid reacts with 1 mole of acetic anhydride to produce 1 mole of acetylsalicylic acid. Therefore, the number of moles of acetylsalicylic acid produced is also 0.0167 mol.

The molar mass of acetylsalicylic acid is 180.16 g/mol. Therefore, the theoretical yield of acetylsalicylic acid is:

mass = n x molar mass

mass = 0.0167 mol x 180.16 g/mol

mass = 3.01 g

Therefore, the theoretical yield of acetylsalicylic acid is 3.01 grams.

To know more about reagent visit:

https://brainly.com/question/31228572

#SPJ1

Answer:

136.63 °C

Explanation:

ΔTb=Tb solution - Tb pure

Where; Tb pure = 133.60°C

molar mass of solute = 121.14 g/mol

number of moles of solute; 52.2g/121.14 g/mol = 0.431 moles

molality = 0.431 moles/350 * 10^-3 = 1.23 molal

Then;

ΔTb = Kb * m * i

Kb = 2.46°C kg mol^-1

m = 1.23 molal

i = 1

ΔTb = 2.46 * 1.23 * 1

ΔTb = 3.03 °C

Hence;

Tb solution = ΔTb + Tb pure

Tb solution = 3.03 °C + 133.60°C

Tb solution = 136.63 °C

Answer:

C, energy cannot be created nor destroyed.

Explanation:

In the 1920s, western powers began to expand their influence in the middle east primarily due to A. The discovery of oil in the region.

In the 1920s, the Western powers, such as Britain and France, began to expand their influence in the Middle East primarily due to the discovery of oil in the region. The discovery of oil brought enormous economic and strategic importance to the region, and the Western powers sought to secure their access to this valuable resource. The discovery of oil also helped to modernize the region, as the Western powers invested in infrastructure development, such as pipelines, ports, and railways, which facilitated the transportation of oil and other goods. The Western powers also sought to protect their interests in the region by establishing protectorates, such as Kuwait and Bahrain, and by dividing up the former Ottoman Empire into new nation-states that would be more amenable to Western influence. This led to a backlash from some in the region, who saw the Western powers as meddling in their affairs, and who called for greater independence and self-determination. Nonetheless, the discovery of oil in the region had a profound impact on the political and economic development of the Middle East and continues to shape the region's geopolitics today.

To know more about the discovery of oil, visit:https://brainly.com/question/11429760

#SPJ4

The volume units that are greater than one liter are kiloliter and megaliter. Kiloliter is equal to 1,000 liters, and megaliter is equal to 1,000,000 liters.

The other volume units listed are smaller than one liter. Milliliter is equal to one-thousandth of a liter, centiliter is equal to one-hundredth of a liter, deciliter is equal to one-tenth of a liter, and nanoliter is equal to one-billionth of a liter.

Knowing the conversions between these volume units is essential in science and everyday life, as they are used to measure the volumes of liquids and gases in different contexts.

To know more about Megaliter , visit :

https://brainly.com/question/14439506

#SPJ1

According to stoichiometry, the mass of phosphorus would be present in the sample is 77.66 grams.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

In the given example, 98 g of phosphorous acid has 30 g phosphorous, thus 253.7 g sample of phosphorous acid will have 253.7×30/98=77.66 grams.

Thus, the mass of phosphorus would be present in the sample is 77.66 grams.

Learn more about stoichiometry,here:

https://brainly.com/question/9743981

#SPJ1

Answer:

Explanation:

Step 1: Data given

The equilibrium constant, Kc, for the following reaction is 4.76 * 10^-4 at 431 K

The equilibrium concentration of Cl2(g) is  0.233 M

Step 2: The balanced equation

PCl5(g)  ⇄ PCl3(g) + Cl2(g)

Step 3: The initial concentration

[PCl5]= Y M

[PCl] = 0M

[Cl2] = 0M

Step 4: Calculate the concentration at equilibrium

[PCl5] = Y + X M = Y - 0.233 M

[PCl]= XM = 0.233 M

[Cl2]= XM = 0.233 M

Step 5: Define Kc

Kc =  [Cl2]* [PCl3] / [PCl5]

4.76 * 10^-4 = 0.233² / (Y -0.233)

0.000476 = 0.05429 / (Y - 0.233)

Y - 0.233 = 0.05429 / 0.000476

Y - 0.233 = 114.05 M

Y = 114.283 M = the initial concentration

The concentration of PCl5 at the equilibrium is 114.05 M

The volume of hydrogen gas collected over water is approximately 25.10 liters. We need to consider the stoichiometry of the reaction, the ideal gas law, and the partial pressure of hydrogen gas.

First, let's balance the equation for the reaction between magnesium (Mg) and hydrochloric acid (HCl):

Mg + 2HCl -> MgCl₂ + H₂

From the balanced equation, we can see that 1 mole of magnesium reacts to produce 1 mole of hydrogen gas.

1. Calculate the number of moles of magnesium (Mg):

Molar mass of Mg = 24.31 g/mol

Number of moles of Mg = Mass of Mg / Molar mass of Mg = 25.6 g / 24.31 g/mol = 1.054 mol

2. Calculate the number of moles of hydrogen gas (H₂):

Number of moles of H₂ = Number of moles of Mg = 1.054 mol

3. Apply the ideal gas law to calculate the volume of hydrogen gas (V₂):

PV = nRT

Given:

Pressure (P) = 785.4 torr

Temperature (T) = 36.5 °C = 36.5 + 273.15 K = 309.65 K

R = 0.0821 L·atm/(mol·K) (gas constant)

Number of moles (n) = 1.054 mol

Convert the pressure to atm:

785.4 torr = 785.4 torr * (1 atm / 760 torr) = 1.032 atm

Substituting the values into the ideal gas law equation:

V₂ = (nRT) / P = (1.054 mol * 0.0821 L·atm/(mol·K) * 309.65 K) / 1.032 atm ≈ 25.10 L

For more such questions on stoichiometry.

https://brainly.com/question/16060223

#SPJ8