Problems:
Show all three steps of using a formula - show the formula, fill in the formula, 8 solve for the answer.
22) Calculate the energy of a photon of radiation with a frequency of 9.50 x 10¹³ Hz.

HINT:
You can make the formula parts larger by dragging them to the size that you prefer. DELETE THIS BOX AFTER READING!
HINT:
To make a superscript, cntrl / cmmd. (period)

Answer:

Explanation:

one was important for the other

Answer:

The oxidation state of nitrogen in NO changes from +2 to 0, and the oxidation state of carbon in CO changes from +2 to +4 as the reaction proceeds.

Explanation:

In the catalytic converter, the oxidation number of nitrogen in NO changes from +2 to 0, and of carbon in CO changes from +2 to +4 as the reaction proceeds. Thus, option C is correct.

The catalytic converter is a device used in vehicle exhaust to reduce the emission of toxic gas. The reaction in the device occurs to convert the nitric oxide into oxygen and nitrogen.

The redox reaction is given as,

2NO(g) + 2CO(g) → N₂(g) + 2CO₂(g)

In the reduction half of the reaction, the electrons are lost (addition of oxygen) like in carbon monoxide the oxygen is added that changes the number from +2 to +4. CO is a reducing agent that oxidized the carbon atom.

In the reduction half of the reaction, the oxygen is removed (electrons are added) and is shown by NO where the oxygen was lost to form N₂ with oxidation +2 to 0.

Therefore, option C. NO is a reducing agent that reduced nitrogen in the reaction.

Learn more about catalytic converters here:

https://brainly.com/question/17093572

#SPJ6

Answer:

18.015

Explanation:

Using the periodic table of the elements to find atomic weights, we find that hydrogen has an atomic weight of 1, and oxygen's is 16. In order to calculate the molecular weight of one water molecule, we add the contributions from each atom; that is, 2(1) + 1(16) = 18 grams/mole.

Answer:

number must be 0000.999

Answer:

The cell potential for the given galvanic cell is 0.188 V.

Explanation:

To calculate the cell potential, we can use the Nernst equation:

Ecell = E°cell - (RT/nF)ln(Q)

where E°cell is the standard cell potential, R is the gas constant (8.314 J/mol·K), T is the temperature in Kelvin (25°C = 298 K), n is the number of moles of electrons transferred (in this case, n = 2), F is the Faraday constant (96,485 C/mol), and Q is the reaction quotient.

First, we need to write the half-reactions and their standard reduction potentials:

Sn4+(aq) + 2e- → Sn2+(aq) E°red = 0.15 V

Fe3+(aq) + e- → Fe2+(aq) E°red = 0.77 V

The overall reaction is the sum of the half-reactions:

Sn2+(aq) + 2Fe3+(aq) → Sn4+(aq) + 2Fe2+(aq)

The reaction quotient Q can be expressed as:

Q = [Sn4+][Fe2+]^2 / [Sn2+][Fe3+]^2

Substituting the given concentrations, we get:

Q = (0.00655)(0.01139)^2 / (0.0624)(0.0437)^2 = 0.209

Now we can calculate the cell potential:

Ecell = 0.15 V + 0.0592 V log([Fe2+]^2/[Fe3+]) + 0.0592 V log([Sn4+]/[Sn2+])

= 0.15 V + 0.0592 V log(0.01139^2/0.0437^2) + 0.0592 V log(0.00655/0.0624)

= 0.188 V

Therefore, the cell potential for the given galvanic cell is 0.188 V.

The cell potential for the given galvanic cell in which the given reaction occurs at 25 °C is 0.188 V.

To find the cell potential, we take the Nernst equation:

Ecell = E°cell - (RT/nF)ln(Q)

In which R is the gas constant (8.314 J/mol·K) and E° cell is the standard cell potential.

T temperature in Kelvin (25°C = 298 K), and n is the number of moles of electrons transferred (n = 2), Q is the reaction quotient and F is the Faraday constant (96,485 C/mol).

Firstly, write the half-reactions and then their standard reduction potentials:

Sn⁴⁺(aq) + 2e⁻  → Sn²⁺(aq) E°red = 0.15 V

Fe³⁺(aq) + e⁻ → Fe²⁺(aq) E°red = 0.77 V

The overall reaction is the sum of the half-reactions:

Sn²⁺(aq) + 2Fe³⁺(aq) → Sn⁴⁺(aq) + 2Fe²⁺(aq)

The Q reaction quotient can be written as:

Q = [Sn⁴⁺][Fe²⁺]² ÷ [Sn²⁺][Fe²⁺]²

Substituting the given concentrations, we observe:

Q = (0.00655)(0.01139)² ÷ (0.0624)(0.0437)² = 0.209

Next, we can find the cell potential:

Ecell = 0.15 V + 0.0592 V log([Fe²⁺]²/[Fe³⁺]) + 0.0592 V log([Sn⁴⁺]/[Sn²⁺])

= 0.15 V + 0.0592 V log(0.01139²÷0.0437²) + 0.0592 V log(0.00655÷0.0624)

= 0.188 V

Thus, the cell potential for the given galvanic cell is 0.188 V.

Learn more about cell potential, here:

https://brainly.com/question/29719917

#SPJ2

Answer:

Usually, the substance present in the greatest amount is considered the solvent.

Answer:

The answer is C if its wrong you can report my answer I'm 100% sure its C

The kinetic energy of a 23.2-g object moving at a speed of 98.7 m/s is  113.30 J. Option D

The kinetic energy of an object can be calculated using the formula: KE = (1/2)mv^2, where KE is the kinetic energy, m is the mass of the object, and v is the velocity or speed of the object.

Given:

Mass (m) = 23.2 g = 0.0232 kg

Speed (v) = 98.7 m/s

Substituting these values into the formula, we can calculate the kinetic energy:

KE = (1/2)(0.0232 kg)(98.7 m/s)^2

KE = (1/2)(0.0232 kg)(9756.09 m^2/s^2)

KE ≈ 113.30 J

Therefore, the kinetic energy of a 23.2-g object moving at a speed of 98.7 m/s is approximately 113.30 J.

It's worth noting that the question is repeated twice, but the answer remains the same. The kinetic energy of the object is determined by its mass and speed, and both calculations yield the same result. Option D

For more sucu questions on kinetic energy visit:

https://brainly.com/question/25959744

#SPJ8

Answer:

The rms speed of its molecules becomes. (T) has become four times. Therefore, v_(rms) will become two times,...

Answer:

Nucleus

Explanation:

they originate in the nucleus

Answer:

the answer is wind sun and water

6.02 x \(10^{20\) formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

To convert formula units of MgCl₂ to moles of MgCl₂, we need to use Avogadro's number, which relates the number of formula units to the number of moles.

Avogadro's number (NA) is approximately 6.022 x 10^23 formula units per mole.

Given that we have 6.02 x 10^20 formula units of MgCl₂, we can set up a conversion factor to convert to moles:

(6.02 x 10^20 formula units MgCl₂) * (1 mol MgCl₂ / (6.022 x 10^23 formula units MgCl₂))

The formula units of MgCl₂ cancel out, and we are left with moles of MgCl₂:

(6.02 x 10^20) * (1 mol / 6.022 x 10^23) = 0.1 mol

Therefore, 6.02 x 10^20 formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

It's important to note that this conversion assumes that each formula unit of MgCl₂ represents one mole of MgCl₂. This is based on the stoichiometry of the compound, where there is one mole of MgCl₂ for every one formula unit.

Additionally, this conversion is valid for any substance, not just MgCl₂, as long as you know the value of Avogadro's number and the number of formula units or particles you have.

For more such questions on MgCl₂ visit:

https://brainly.com/question/26311875

#SPJ8

ppm = mg/L = mg/kg

6.67 x 10⁻³ g = 6.67 mg

ppm = 6.67 mg : 0.6 L = 11.12

Answer:

D is correct.(1s22s22p63s2)

The chemical equations for these reactions are as follows

a. C10H8 + 12 O2 → 10 CO2 + 4 H2O

b. H2S(g) + MnCl2(aq) → MnS(s) + 2 HCl(aq)

c. 3 Mg(s) + N2(g) → Mg3N2(s)

d. 2 OF2(g) → 2 O2(g) + F2(g)

a. Naphthalene is a hydrocarbon with the chemical formula C10H8. When it is heated in the presence of oxygen (air), it undergoes combustion. The reaction produces carbon dioxide (CO2) and water (H2O) as the products. The combustion of naphthalene is an example of a combustion reaction.

b. Chemical reaction takes place when hydrogen sulphide gas (H2S) is bubbled through a manganese(II) chloride (MnCl2) solution dissolved in water. The result of the reaction is a precipitate of hydrochloric acid (HCl) and manganese(II) sulphide (MnS). It is an example of a double displacement or precipitation reaction.

c. Chemical reaction takes place when solid magnesium (Mg) is heated in the presence of nitrogen gas (N2). Solid magnesium nitride (Mg3N2) is the end result of the reaction. It is an example of a synthesis reaction.

d. Heat causes a chemical reaction in oxygen difluoride gas (OF2) that results in the production of oxygen gas (O2) and fluorine gas (F2). The decomposition of oxygen difluoride gas into oxygen and fluorine gases upon heating is an example of a decomposition reaction.

For more question on chemical equations click on

https://brainly.com/question/13847161

#SPJ4

Types of luminous flames:

1. Yellow Luminous Flame

2. Smoky Luminous Flame

3. Orange Luminous Flame

4. Blue Luminous Flame

Luminous flames are characterized by their visible glow, which is caused by the incomplete combustion of fuel. The presence of soot particles in the flame causes the emission of light. There are different types of luminous flames, which can be classified based on their fuel composition and burning conditions. Here are some common types of luminous flames:

1. Yellow Luminous Flame: This is the most common type of luminous flame, often seen in open fires, candles, and gas stoves. It appears yellow due to the presence of soot particles in the flame. Yellow flames indicate incomplete combustion of hydrocarbon fuels, such as methane, propane, or natural gas. The high carbon content in these fuels leads to the formation of soot, which emits visible light.

2. Smoky Luminous Flame: This type of flame is characterized by a significant amount of black smoke and soot production. It is commonly observed in poorly adjusted or malfunctioning burners or engines. The excessive presence of unburned fuel in the flame results in incomplete combustion and the emission of dark smoke particles.

3. Orange Luminous Flame: An orange flame indicates a higher combustion temperature compared to a yellow flame. It is often seen in more efficient burners or when burning fuels with a higher carbon content, such as oil or diesel. The higher temperature helps in burning more of the carbon particles, reducing the amount of soot and making the flame appear less yellow.

4. Blue Luminous Flame: A blue flame is typically associated with complete combustion. It indicates efficient burning of fuel, resulting in minimal soot formation. Blue flames are commonly observed in gas burners or Bunsen burners. The blue color is a result of the combustion of gases, such as methane, in the presence of sufficient oxygen.

It's important to note that the luminosity of a flame can vary depending on factors such as fuel-air mixture, combustion temperature, and the presence of impurities. Achieving complete combustion and minimizing the production of soot is desirable for efficient and cleaner burning processes.

for more questions on luminous

https://brainly.com/question/27163038

#SPJ8

1129.9 grams of rock salt, NaCl needs to be added to a 3.78 kg of ice, to get the temperature to drop to -19C .

Freezing point depression refers to a property of solutions where addition of a solute lowers the normal freezing point of the solvent.

The Blagden's Law given as the equation above is used to determine the freezing point depression of ice:

where;

For NaCl, i = 2

Kf for water/ice = 1.86 °C kg/mol

molalityof NaCl = (mass/molar mass

l)/kg of ice

molar mass of NaCl = 58.5

mass of ice = 3.78 kg

Let molality of NaCl = m

ΔT = 19 °C

Substituting the values:

19 = 2 x 1.86 °C kg/mol x m

m = 5.11 mol/kg

mass of NaCl = 5.11 × 3.78 × 58.5

mass of NaCl = 1129.9 g

Therefore, the mass in grams of rock salt, NaCl that needs to be added to a 3.78 kg of ice, to get the temperature to drop to -19C is 1129.9 g

Learn more about freezing point depression at: https://brainly.com/question/26525184

Answer:

Chemical properties of each element are determined by the element's electronic configuration, and particularly by its outermost valence electrons. .

B. Cao(s) (Calcium oxide)

The balanced equation would be:

Ca(s) + O2(g) --> Cao(s)

It is the product of Calcium oxide.

The product of the reaction between sodium and chlorine is sodium chloride (NaCl). When sodium (Na) and chlorine (Cl) react, they form an ionic bond, with the sodium atom losing one electron to the chlorine atom. This forms a positively charged sodium ion (Na+) and a negatively charged chloride ion (Cl-), which are held together by electrostatic attraction to form the compound sodium chloride. It is a white crystalline solid and is commonly known as table salt.

To know more about Sodium visit: https://brainly.com/question/24010534

#SPJ1

Dissolve 60g of potassium bromide in 340g of water to produce 15% (mass/mass) aqueous solution of potassium bromide.

Here we have to prepare a total of 400 g of solution. Aqueous solution means the solvent we use here is water.

So to prepare 400 g of 15% aqueous solution of potassium bromide, we need to find out how many grams of potassium bromide need to be dissolved in water and how many grams of water must be used.

Here the weight percent is given, that is 15%

       15/100 = weight of potassium bromide/ 400 g

       0 .15      = weight of potassium bromide / 400

      weight of potassium bromide needed = 0.15 × 400

                                                                       =  60 g

So, we calculated the required amount of potassium bromide as 60 grams. The total weight of the solution to be made is 400 grams.

So amount of water required = 400 - 60

                                                =  340 g

So we need to mix 60 grams of potassium bromide in 340 grams of water to get a 15% (mass/mass) aqueous solution.

For further information about preparing aqueous solutions, please refer

https://brainly.com/question/13684060

Moles of Li₂S will be required to completely react with 45.0 mL of 0.100 M Fe(NO₃)₃ is 0.00675 moles.

The reaction is as follows :

3 Li₂S(aq) + 2 Fe(NO₃)₃(aq) → Fe₂S₃(s)  + 6 LiNO₃(aq)

Molarity = mol / V in L

Molarity = 0.100 M

Volume = 45.0 mL = 0.045 L

now , putting the values in formula :

M = mol / V

mol = M × V

moles = 0.100 × 0.045

moles = 0.0045 moles of Fe(NO₃)₃

from the equation it is clear that :

2 moles of Fe(NO₃)₃ react with 3 moles of  Li₂S

therefore, 0.0045 moles of Fe(NO₃)₃ react with = (3 × 0.0045 ) / 2

                                                                               = 0.00675 moles of Li₂S

Thus, Moles of Li₂S will be required to completely react with 45.0 mL of 0.100 M Fe(NO₃)₃ is 0.00675 moles.

To learn more about number of moles here

https://brainly.com/question/26416088

#SPJ1

At pOH value  of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

In this question we will apply the formula

      pH +pOH = 14 . . . . . . . . . . . . .(1)

where pH = concentration of [\(H^{+}\) ] ion

pOH = concentration of [\(OH^{-}\) ] ion

As per the question

pOH =6.0

Putting the value of pOH in equation (1) we get the value of pH

              pH + 6.0 =14

             pH = 14 -6.0

             pH  = 8.0

 The value of pH if the pOH value is 6.0 is 8.0

To find the concentration of \(H^{+}\) ion we will use the following formula

This is calculated by the formula

                                 [\(H^{+}\)} = \(10^{-pH}\)

where we will write the values of pH

Hence the concentration of [\(H^{+}\)} ion is \(10^{-8}\)

Therefore at  pOH of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

Read more about pH

https://brainly.com/question/11300720

The complete question is -

What is the pH value and concentration of [\(H^{+}\) ] ion of the following if the pOH value of the solution is 6.0 ?

Answer:

Let's find out time using musically to we not less X elation times T um Sylvia 120 kilometer are and be known to get 70-kilometer bar are jobless acceleration. Relax. The relation is six housing kilometers where R squared times D and solving 40 t is equal to one divided by 120 hours which is equal to 32nd. Let's find a distance traveled using s is equal to a snot. Let's be not times de lis. How 50 square off 80 Um, A. Sees the exploration of car Times T's were no, that's like in numbers. So a distance is equal to 70 uh, kilometer, but are into one divided by 120 hard is less, one divided by two into x elation of God. It is a 6000-kilometer bar are square, are in duty square will t swear. He's one divided by 120 holes where so t is equal to 0.79 kilometers

Explanation:

Answer: a weak acid

Explanation:

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases. Oxidizing agent is the substance which itself gets reduced by gaining electrons and thus oxidize others.

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced. Reducing agent is the substance which itself gets oxidized by losing electrons and thus reduces others.

Weak acids are those substances which dissociate partially to give \(H^+\) ions when dissolved in water.

\(C_6H_5OH\rightleftharpoons C_6H_5O^-+H^+\)

Weak bases are those substances which dissociate partially to give \(OH^-\) ions when dissolved in water.

\(NH_4OH\rightleftharpoons NH_4^++OH^-\)

The original mass of Tritium (hydrogen-3) was 13.4mg if its current mass is 0.42 micrograms.

The formula for radioactive decay is given by:

N = N0 x (1/2)^(t/T)

where,

N = final number of radioactive atoms

N0 = initial number of radioactive atoms

t = time elapsed

T = half-life of the radioactive substance

Let's substitute the given values into the formula:

0.42 μg = N0 x (1/2)^(60/12)

0.42 μg = N0 x (1/2)^5

0.42 μg = N0 x 1/32

N0 = 0.42 μg x 32

N0 = 13.44 μg

Therefore, the original mass of the tritium sample was 13.44 micrograms.

What is radioactive decay?

Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting ionizing radiation, such as alpha particles, beta particles, and gamma rays. This process can result in a change in the number of protons and/or neutrons in the nucleus, leading to the transformation of one element into another. The rate of decay is typically characterized by a half-life, which is the time required for half of the atoms in a sample to decay.

To know more about radioactive decay, visit:

https://brainly.com/question/1770619

#SPJ1