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The IUPAC name of the compound that have been shown in the image here is 1-methyl cyclopenta-1,4 diene

The IUPAC (International Union of Pure and Applied Chemistry) nomenclature system is a set of rules and guidelines used to name organic and inorganic compounds systematically. It provides a standardized way to name chemical compounds, ensuring clarity and consistency in scientific communication.

The IUPAC name is derived based on the structure and functional groups present in the compound. The name typically consists of several components that provide information about the compound's structure, substituents, and functional groups.

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The empirical formula for this compound is CH₂Cl₂.

C = 14.14% / 12 = 1.17

H = 2.38% / 1 = 2.38

Cl = 83.48% / 35.5 = 2.35

Now, divide by 1.17

C = 1.17 / 1.17 = 1

H = 2.38 / 1.17 = 2

Cl = 2.35 / 1.17 = 2

Therefore, The empirical formula for this compound is CH₂Cl₂.

In chemistry, the  empirical formula of a chemical compound is the best entire variety ratio of atoms found in a compound.

There are three main types of chemical formulas: empirical, molecular and structural. Empirical formulas display the best whole-range ratio of atoms in a compound, molecular formulas show the quantity of every kind of atom in a molecule, and structural formulas display how the atoms in a molecule are bonded to every different.

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Answer:

yes

Explanation: took quiz

The vapor pressure at 85.0°C of a solution prepared by dissolving 0.300 mol of liquid dibromoethane the vapor pressure at 85.0°C of a solution prepared by dissolving 0.300 mol of liquid dibromoethane is 164.83 torr.

The term vapor pressure is defined as the tendency of a material to change into the vapour state, and it increases with temperature.

For calculating mole fraction of C₂H₄Br₂ as follows

X C₂H₄Br₂ = moles of C₂H₄Br₂ / moles of C₂H₄Br₂ + moles of C₃H₆Br₂

= 0.3 / 0.3 + 1.80

= 0.14

For calculating mole fraction of C₃H₆Br₂ as follows:

XC₃H₆Br₂ =  moles of C₃H₆Br₂ / moles of C₂H₄Br₂ + moles of C₃H₆Br₂

= 1.80 / 2.1

= 0.85

For calculating total vapor pressure as follows:

P total = [ ( 0.14 × 127) + (0.85 × 173) ]

= 17.78 + 147.05

= 164.83 torr

Thus, The vapor pressure at 85.0°C of a solution prepared by dissolving 0.300 mol of liquid dibromoethane the vapor pressure at 85.0°C of a solution prepared by dissolving 0.300 mol of liquid dibromoethane is 164.83 torr.

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Answer:

Explanation:

Except on Star Trek (the original there was a creature made of Silicon as a base) every organic compound has Carbon in it and usually hydrogen (but there are exceptions).

There is no reason to run these solutes at the 20 MWCO because they are both much smaller than the MWCO of the membrane.

The MWCO (molecular weight cut off) is the molecular weight of a solute at which it will be retained by a membrane during a process such as ultrafiltration or dialysis. If a solute has a molecular weight higher than the MWCO of a membrane, it will be retained and not pass through the membrane. If the molecular weight of a solute is lower than the MWCO, it will pass through the membrane.

In this case, glucose has a molecular weight of 180 g/mol (6 carbons x 12 g/mol per carbon + 6 oxygens x 16 g/mol per oxygen) and albumin has a molecular weight of approximately 81,942 g/mol (607 amino acids x 135 g/mol per amino acid). Both of these solutes have molecular weights that are much lower than 20,000 g/mol, which is a typical MWCO for ultrafiltration or dialysis membranes.

They would both easily pass through the membrane and be lost during the process. Instead, a membrane with a much lower MWCO would be needed if we wanted to retain these solutes during a process such as ultrafiltration or dialysis.

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Answer: The final pressure inside the tank is 8.41 kPa.

Explanation: We can use the combined gas law to solve this problem, which relates the pressure, volume, and temperature of a gas:

(P1V1)/T1 = (P2V2)/T2

where P1, V1, and T1 are the initial pressure, volume, and temperature, respectively, and P2, V2, and T2 are the final pressure, volume, and temperature, respectively.

We are given P1 = 25.0 kPa, T1 = -50 C = 223 K, and V1 is unknown. We also know that the temperature decreases by a factor of three, so T2 = T1/3 = 223/3 K.

To find V2, we need to assume that the steel container is rigid and its volume remains constant. Therefore, V1 = V2, and we can cancel out the volume from the equation:

P1/T1 = P2/T2

Substituting the values, we get:

P2 = P1 * T2 / T1 = 25.0 * (223/3) / 223 = 8.41 kPa

Therefore, the final pressure inside the tank is 8.41 kPa.

Answer:

So if pressure of a gas is increased by 25%, the volume of a gas is decreased by 25%.

Explanation:

Answer:

Therefore, the specific heat capacity of the iron is 0.567J/g.°C.

Note: The question is incomplete. The complete question is given as follows:

A 59.1 g sample of iron is put into a calorimeter (see sketch attached) that contains 100.0 g of water. The iron sample starts off at 85.0 °C and the temperature of the water starts off at 23.0 °C. When the temperature of the water stops changing it's 27.6 °C. The pressure remains constant at 1 atm.

Calculate the specific heat capacity of iron according to this experiment. Be sure your answer is rounded to the correct number of significant digits

Explanation:

Using the formula of heat, Q = mc∆T  

where Q = heat energy (Joules, J), m = mass of a substance (g)

c = specific heat capacity (J/g∙°C), ∆T = change in temperature (°C)

When the hot iron is placed in the water, the temperature of the iron and water attains equilibrium when the temperature stops changing at 27.6 °C. Since it is assumed that heat exchange occurs only between the iron metal and water; Heat lost by Iron = Heat gained by water

mass of iron  = 59.1 g, c = ?, Tinitial = 85.0 °C, Tfinal = 27.6 °C

∆T = 85.0 °C - 27.6 °C = 57.4 °C

mass of water = 100.0 g, c = 4.184 J/g∙°C, Tinitial = 23.0 °C, Tfinal = 27.6 °C

∆T = 27.6°C - 23.0°C = 4.6 °C

Substituting the values above in the equation; Heat lost by Iron = Heat gained by water

59.1 g * c * 57.4 °C  = 100.0 g * 4.184 J/g.°C * 4.6 °C

c = 0.567 J/g.°C

Therefore, the specific heat capacity of the iron is 0.567 J/g.°C.

The statement "when a bottle of soda was opened, bubbles rapidly appeared in the liquid and were given off at the surface" can be categorized as an observation.

Observation refers to the act of noticing or perceiving something through the senses. In this case, the statement describes a specific event that was directly observed: the opening of a bottle of soda and the rapid appearance of bubbles in the liquid, which were then given off at the surface. This observation describes a phenomenon that can be witnessed and measured.

The appearance of bubbles when a bottle of soda is opened is a well-known and predictable occurrence. It can be explained by the principles of gas solubility and pressure.

The soda contains dissolved carbon dioxide (CO2) under high pressure, which is responsible for the carbonation. When the bottle is opened, the sudden release of pressure causes the dissolved CO2 to come out of solution, forming bubbles. These bubbles then rise to the surface and are released into the air.

While this statement captures an observed phenomenon, it does not propose a general principle or provide a comprehensive explanation of the underlying mechanisms. Therefore, it does not qualify as a law or theory, but rather as an observation based on direct sensory perception.

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Answer:

Electrons are shared when ionic bonds are formed

The statement which describes an ionic bond formation is  " a metal donates one or more of its electron to a non-metal.

An ionic bond is formed between two atoms by electron donating by one atom and gaining by the second atom. The electron donating element is electropositive and the electron accepting one is electronegative.

Normally the electropositive elements are metals of 1st or 2nd group of periodic table. They can make bond with non-metals like halogens and other electronegative elements like nitrogen, oxygen etc.

Therefore, the force of attraction which binds two atoms together in an ionic bond is formed by electron donation by a metal to a non-metal.

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According to the concept of molar concentration, molarity of the solution is 1.525 M.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.

In the given problem, by substituting values in mentioned formula related to moles we get,7.32/4.80=1.525 M.

Thus , the molarity of solution is 1.525 M.

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Answer:

HI>HBr>HCL>HF

Explanation:

An electron has a negative charge.

The charge of an electron is a fundamental property of the particle, and it is denoted by the symbol "e." The magnitude of the charge of an electron is approximately 1.602 × 10^-19 coulombs (C). This value is considered the elementary charge and is used as a reference for other charges. The charge of an electron plays a significant role in determining the behavior and interactions of atoms and molecules. It is opposite in sign to the charge of a proton, which is positive. The electron's charge allows it to interact with other charged particles, such as protons and ions, through electrostatic forces. Electrons are subatomic particles that orbit the nucleus of an atom in specific energy levels or orbitals. They contribute to the overall stability and chemical properties of atoms and participate in chemical bonding and reactions. The movement of electrons between atoms is what enables the formation of chemical bonds and the sharing or transfer of electrons to create ions. In summary, the charge of an electron is negative, and it plays a fundamental role in the structure and behavior of atoms and molecules.

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The molarity of a sample of NaCl dissolved in 250mL of solution is 5.46 M.

Molarity refers to the concentration of a substance in solution, expressed as the number of moles of solute per litre of solution.

The molarity of a solution can be calculated by dividing the number of moles in the substance by its volume as follows;

Molarity = no of moles ÷ volume

According to this question, 79.91 grams of NaCl is equivalent to 79.91g ÷ 58.5g/mol = 1.37 moles.

Molarity = 1.37 mol ÷ 0.250 L = 5.46 M

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Answer:

Less than 7

Explanation:

during the titration of strong acid and weak base, the weak base is usually kept in the flask and strong acid is kept in the burette. So when we add strong acid slowly drop by drop, slowly the pH level of solution starts to decrease and at equivalence point the acid overpowers the base as a strong acid was taken over a weak base.

Answer: C

Explanation:

4.26 is the pH of this solution.  pH has historically stood for "potential of hydrogen".

In chemistry, the pH scale is used to define the level of basicity or acidity of an aqueous. pH has historically stood for "potential of hydrogen" (sometimes "power of hydrogen").

Lower pH values are recorded for acid solution (solutions with greater H ion concentrations) than for basic or alkaline solutions.

1)pH= pka + log ([base]/[acid])

pka = -log ka=  -log 1.8×10⁻⁵=4.74

pH=4.74+ log ([0.2]/[0.6])

   =4.26

2)Moles of HC\(_2\)H\(_3\)O\(_2\) = 0.60 mol per L ×1 L = 0.60 mol

Moles of NaC\(_2\)H\(_3\)O\(_2\) = 0.20 mol per L ×1 L =0.20 mol

HC\(_2\)H\(_3\)O\(_2\)= 0.60 mol + 0.10 mol = 0.70 mol

NaC\(_2\)H\(_3\)O\(_2\) = 0.20 mol – 0.10 mol = 0.10 mol

pH= pka + log ([base]/[acid])

pH = 4.74 + log [0.10/0.70]

     = 3.89

3)HC\(_2\)H\(_3\)O\(_2\)  = 0.60 mol -0.20 mol = 0.40 mol

NaC\(_2\)H\(_3\)O\(_2\) = 0.20 mol + 0.20 mol = 0.40 mol

pH= pka + log ([base]/[acid])

pH= 4.74 + log [0.40 /0.40]

pH=  4.74

Therefore, 4.26 is the pH of this solution.

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Answer:

1.  2.28 g

2. 0.82 g

3. 1.35 g

4. 36 %

5. 59 %

6. 2.17 g

7. 95 %

Explanation:

Hello,

1. In this case, the mass of the unknown mixture is obtained by subtracting the mass of the dish plus sample and the mass of the dish:

m = 26.57 g- 24.29 g = 2.28 g

2. In this case, the mass of the NaCl recovered is obtained by subtracting the mass of the dish plus NaCl and the mass of the dish:

m = 68.66 g- 67.84 g = 0.82 g

3. In this case, the mass of the sand recovered is obtained by subtracting the mass of the filter paper plus sand and the mass of the filter paper:

m = 37.69 g- 36.34 g = 1.35 g

4. The percentage of NaCl is computed by considering its mass and the mass of the unknown mixture:

% NaCl = 0.82 g / 2.28 g * 100 % = 36 %

5. The percentage of sand is computed by considering its mass and the mass of the unknown mixture:

% sand = 1.35 g / 2.28 g * 100 % = 59 %

6. Here,we have to add the mass of NaCl and sand:

m = 0.82 g + 1.35 g = 2.17 g

7. Finally, the percent recovery is obtained by diving the total recovered mass by the total obtained mass of the mixture:

% recovery = 2.17 g / 2.28 g * 100 % = 95 %

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The  name of the organic compound with structural formula of nine carbons and sixteen hydrogens  depends on different factors

The nomenclature of the organic molecule comprising nine carbons and sixteen hydrogens is determined by the arrangement of its atoms as well as the nature of the chemical bonds linking them together. Cyclononane is a circular formation of nine carbon atoms.

An organic substance belongs to a group of chemicals that have carbon atoms linked to each other and other atoms through covalent bonds, and are present in the biological cells. Organic compounds contain usual elements such as carbon, as well as hydrogen, oxygen, and nitrogen.

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Answer:

I would say the batteries is the answer

Explanation:

because the circuit is depending on the electricity while the batteries are already charged with electricity. the stop watch is depending on the light bulb to go out and the light bulb is depending on the circuit electricity.

I hope this is the correct answer and that my reasoning makes sense

Answer:

Liquid to gas.

Explanation:

Answer:

b

Explanation:

Water in to a gas or evaporation

So, the speed of the proton is approximately 2.30 x 10⁶ m/s.

The de Broglie wavelength is a concept in quantum mechanics that was introduced by Louis de Broglie in 1924. It refers to the wavelength associated with a moving particle, such as an electron, proton, or other type of particle, and is proportional to its momentum.

To find the speed of the proton (v): v = h/(mλ)

v = (6.626 x 10⁻³⁴ Js) / [(1.67 x 10⁻²⁷kg)(154 x 10⁻¹² m)]

= 2.30 x 10⁶ m/s

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The energy in joules of one mole of photons of visible light having a wavelength of 4.11×10^2 nm? can be expressed as 2.9*10^5 J

From the question we were told to find the energy and the parameters that is needed to calculate these are;

c=3*10^8

h= 6.626 * 10^-34 J.s

1 mol photons = 6.023x10^23 photon

λ = 4.11×10^2 nm  = 4.11 × 10-7 meters

The parameters can be input  as Energy of one mole photon (E) = ( 6.023x10^23 * 6.626 * 10^-34 * 3*10^8)/ (4.11 × 10^-7)

=291302

=2.9*10^5 J

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Answer:

part 1

3) 5.47 molecules

4) 11.15 moles

5) 2.95 × 10^23 molecules

6) 7670.9g

part2

1) 216000g

2) 5.71 molecules

3) 0.18 moles

4) 737.40g

5) 2.89×10^23 molecules

Explanation:

part 1

3) number of moles = (6.02 × 10^23)/11.0

=5.47molecules.

4) moles= (6.02 × 10^23)/(5.40×10^23)

= 11.15 moles

5) molar mass of NH3= 14+(3×1)= 14+3=17

number of molecules= (6.02 × 10^23) × 17/35

= (6.02 × 10^23)× 0.49 =2.95 × 10^23 molecules

6) molar mass of N2I6= (2×14) + (6×127)

= 28+762= 790g/mol

mass= 790 × (6.02 × 10^23)/(6.20×10^22)

=790× 9.71= 7670.9g

part 2

1) molar mass of CuBr= 64+80= 144g/mol

mass= 1500 × 144= 216000g

2) molecules = (6.02 × 10^23)/1.055

= 5.71 molecules

3) moles = (6.02 × 10^23)/(3.35×10^24)

= 0.18 moles

4) molar mass of SiO2= 28+ (2×16)= 28+32

=60gmol

mass= 60 × (6.02 × 10^23)/(4.90×10^22)

= 60× 12.29= 737.40g

5) molar mass of CH4= 12+(4×1)= 12+4=16g/mol

number of molecules= (6.02 × 10^23) × 16/33.6

= (6.02 × 10^23)× 0.48

= 2.89×10^23 molecules

The mole fraction is the ratio of the number of moles of a component of a solution to the total number of moles. For example:

mole fraction of H₂O = number of moles of H₂O/(total number of moles)

To find the mole fraction of each component we only have to find the total number of moles and then apply the formula.

total number of moles = moles of H₂O + moles of C₂H₅OH

total number of moles = 6.8 moles + 1.5 moles

total number of moles = 8.3 moles

mole fraction of H₂O = moles of H₂O/total number of moles

mole fraction of H₂O = 6.8 moles/(8.3 moles)

mole fraction of H₂O = 0.82

mole fraction of C₂H₅OH = moles of C₂H₅OH/total number of moles

mole fraction of C₂H₅OH = 1.5 moles/(8.3 moles)

mole fraction of C₂H₅OH = 0.18

Answer: the mole fraction of H₂O is 0.82 and the mole fraction of C₂H₅OH is 0.18.

Answer:

before

Explanation:

Answer:

Does evaporation happen before of after condensation?

Explanation:

Condensation, the opposite of evaporation, occurs when saturated air is cooled below the dew point (the temperature to which air must be cooled at a constant pressure for it to become fully saturated with water), such as on the outside of a glass of ice water.

Or

Heat (energy) is necessary for evaporation to occur. Condensation, the opposite of evaporation, occurs when saturated air is cooled below the dew point (the temperature to which air must be cooled at a constant pressure for it to become fully saturated with water), such as on the outside of a glass of ice water.

Answer:

1) Length - Meter

2) Mass - Pound

3) Time - Minute

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If 105.5mg sample of a white substance, suspected of being

cocaine (C17H21NO4), forms 2.79.3mg of CO2 and 66.46mg of

water on combustion, then the white solid is cocaine.

A Combustion reaction is defined as the chemical reaction which is generally a fuel that undergoes an oxidation by the reaction by the help of an oxidizing agent, which further results in the emission of energy.

Thus, we concluded that the white solid is cocaine if If 105.5mg sample of a white substance, suspected of being

cocaine (C17H21NO4), forms 2.79.3mg of CO2 and 66.46mg of water on combustion.

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59g

Amount of salt (solute) = 9g amount of solvent = 50g mass of solution= Mass of solute + mass of solvent=

50+9=59g