how many isomers are possible for [cr(nh3)5(no2)]cl2? consider all possible types of isomerism and draw each isomer.

Compared with Group 6A elements, Group 2A elements have two valence electrons. These valence electrons are the outermost electrons in an atom, which determine the properties of the element. Group 2A elements are known as alkaline earth metals, and they are located in the second column on the periodic table of elements.

Their reactivity is much higher than group 6A elements because of their two valence electrons, and they readily form ionic bonds with other elements, particularly halogens such as chlorine and bromine, to form compounds called metal halides. They are more reactive towards water than Group 6A elements. The reactivity of Group 2A elements increases as we go down the group because the size of the atoms increases, making it easier for the atoms to lose their two valence electrons. This causes the Group 2A elements to become more metallic, with their reactivity increasing as we go down the group.

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-12833.33 kJ/lb is the energy change for the first reaction in kJ per pound. -65000 kJ/1b is the energy change for the second reaction in kJ per pound.

Energy change in chemistry refers to the variation in a system's overall energy between two states or circumstances. It is a crucial idea in comprehending how matter behaves and how chemicals react.

Dimethyl hydrazine gives 1694 kJ of energy per mole of compound

molar mass = 60.01g/mol

mass of Dimethyl hydrazine, m = 1 mol x60.01g/mol

= 60.01gx{1lb/453.59 g}

= 0.1321b

calculate the energy change for 1st reaction in kJ/lb as follows:

=ΔΗrxn/m

=-1694 kJ/0.132lb

=-12833.33 kJ/lb

molar mass of \(\rm H_2\) = 2 gm/mol

mass of \(\rm H_2\) = 1molx 2 gm/mol

           = {2 gm x 1lb/453.59 g}

            = 0.00441b

calculate the energy change for 2nd reaction in kJ/lb as follows:

=ΔΗ/m

=-286 kJ/0.0044lb

=-65000 kJ/1b

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The difference in the amounts of chemical energy that are stored in the products and reactants accounts for the energy change in a chemical reaction. The energy change for the first reaction is -12833.33 kJ/lb and that of the second is -65000 kJ/lb.

Usually, energy shifts are connected with phase transitions. For instance, carbon dioxide molecules take in energy when solid dry ice vaporizes (physical change). Energy is released when liquid water freezes.

Dimethyl hydrazine gives 1694 kJ of energy per mole of compound

Molar mass = 60.01g/mol

Mass of Dimethyl hydrazine, m = 1 mol x60.01g/mol

m = 60.01gx[1lb/453.59 g]

m = 0.132lb

The energy change for 1st reaction in kJ/lb as follows:

Energy change = ΔΗrxn/m

E = -1694 kJ/0.132lb

E = -12833.33 kJ/lb

Molar mass of H₂ = 2 gm/mol

Mass of H₂  = 1molx 2 gm/mol

m = [2 gm x 1lb/453.59 g]

m = 0.0044lb

The energy change for 2nd reaction in kJ/lb as follows:

Energy change = ΔΗ/m

E = -286 kJ/0.0044lb

E = -65000 kJ/lb

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Answer rating0.0

(0 votes)

Answer:

8.1293534120006496

Explanation:

hope this helps

Answer:

Part 1:sodium

rubidium

Part 2: protons neutrons and electrons are all 12

The number of protons is equal to the no. of neutrons from the electronic arrangement of magnesium and the no. of electrons is got from the atomic no. of magnesium

Answer:

1. Trends that exist in the periodic table include:

- Atomic size: atomic radius generally decreases from left to right across a period and increases from top to bottom down a group.

- Ionization energy: the energy required to remove an electron from an atom generally increases from left to right across a period and decreases from top to bottom down a group.

- Electronegativity: the ability of an atom to attract electrons in a chemical bond generally increases from left to right across a period and decreases from top to bottom down a group.

- Metallic character: metals are generally located on the left side of the periodic table and become less metallic going to the right and up the table.

- Nonmetallic character: nonmetals are generally located on the right side of the periodic table and become more nonmetallic going to the right and up the table.

- Reactivity: the reactivity of elements varies depending on the type of reaction and the group or period an element is in.

2. The periodic table provides a wealth of information about each element, including:

- Atomic number: the number of protons and electrons in an atom's nucleus

- Element symbol: an abbreviation used to represent each element

- Element name: the full name of the element

- Atomic mass: the mass of an atom, expressed in atomic mass units (amu)

- Group: the vertical columns in the periodic table, which share similar chemical and physical properties

- Period: the horizontal rows in the periodic table, which show trends in atomic properties

- Electron configuration: the arrangement of electrons in an atom's orbitals

- Oxidation state: the number of electrons an atom gains, loses, or shares when forming a chemical compound

- Physical properties: such as melting point, boiling point, density, color, and state (solid, liquid, gas)

- Chemical properties: such as reactivity, bond formation, and acid-base behavior.

Answer: Precision

Explanation:

Answer: 519.4

Explanation:

Im taking the same class and just answered the exact question

The standard cell notation of a galvanic cell made with aluminum and magnesium is option A. Al3+(aq) | Al(s) || Mg(s) | Mg2(aq).

The right side is the cathode and the left side is the anode. The cell is represented by the convention that the metal is written first, then the metal ions present in the electrolyte. And these two should be separated by a vertical line. Zinc becomes the cathode of the galvanic cell.

Galvanic cells consist of two different metal electrodes connected by a conductive solution electrolyte, which are also connected externally to complete an electrical circuit. Cell notation or cell representation in chemistry is a simple way of representing reactions in an electrochemical cell. The silver half-cell is reduced due to its high standard reduction potential. Tin half-cells are oxidized.

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Answer: C

Explaination:

Answer:

I think 1 option ok basically I am a scientist

Answer:

(3)

Explanation:

The standard reduction potential of Y³+ is -0.52 V.

Y(s) | Y³+(aq) || Ag+(aq) | Ag(s)

The cell potential is 1.32 V, which means that the standard cell potential (Eºcell) is also 1.32 V.

The half-reaction for the reduction of Ag+ to Ag is:

Ag+(aq) + e- → Ag(s) Eºred = +0.80 V

To calculate the standard reduction potential of Y³+, we need to use the Nernst equation:

Eºcell = Eºred,cathode - Eºred,anode

1.32 V = Eºred,Ag+ → Ag - Eºred,Y³+ → Y

Eºred,Y³+ → Y = Eºred,Ag+ → Ag - 1.32 V

Eºred,Y³+ → Y = 0.80 V - 1.32 V

Eºred,Y³+ → Y = -0.52 V

The Nernst equation is a fundamental equation in electrochemistry that relates the concentration of a species involved in a redox reaction to the potential difference across an electrochemical cell. It is named after German chemist Walther Nernst, who developed it in 1889. The Nernst equation is given by: E = E° - (RT/nF) ln(Q)

Where E is the cell potential, E° is the standard cell potential, R is the gas constant, T is the temperature in Kelvin, n is the number of electrons transferred in the reaction, F is Faraday's constant, and Q is the reaction quotient. The equation can be used to calculate the cell potential of a half-cell or the overall potential of a complete electrochemical cell. It is also useful in determining equilibrium constants for redox reactions.

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When steel and zinc were connected, zinc is the cathode. The term cathode refers to the electrode that is reduced during an electrochemical reaction.

The electrons are moved from the anode to the cathode during an electrochemical reaction in order to maintain a current in the wire that links the two electrodes.

According to the galvanic series, zinc is more active than iron, meaning that it is more likely to lose electrons and be oxidized. As a result, when steel and zinc are connected, zinc will act as the anode and lose electrons, whereas iron (steel) will act as the cathode and receive the electrons transferred by zinc.

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The mixture of phenol and benzoic acid is separated by adding \(NaHCO_{3}\)  to produce brisk effervescence with sodium benzoate .

When benzoic acid react with \(NaHCO_{3}\) then sodium benzoate is produced which is soluble in water and separated from non aqueous solvent . Organic compounds are soluble in organic solvent and inorganic compound mainly soluble in inorganic solvent like water.

What is brisk effervescence?

Brisk effervescence is when continuous gas evolution occurs in a chemical reaction like CO2. When HCl is added in \(NaHCO_{3}\) then CO2 evolved.

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Answer:

1. 111.54 kJ

2. 944.68 kJ

3. 339 kJ

4. 94.92 kJ

5. 21.0578 kJ

Explanation:

1. The heat required to melt a given quantity of ice is known as the latent heat of fusion, \(L^{\circ}_F\), of ice

\(L^{\circ}_F\), of ice = 330 J/g

The heat required to melt a given mass of ice = Mass of ice, m × latent heat of fusion, \(L^{\circ}_F\), of ice

The heat required to melt 338 grams of ice = 338 g × 330 J/g = 111,540 J = 111.54 kJ

2. The latent heat of vaporization, l, of water = 2260 J/g

The heat required to convert, m grams of water to steam at

The heat required to convert 418 grams of boiling water into steam = 418 g × 2260 J/g = 944680 J = 944.68 kJ

3. To convert 150 grams of boiling water to steam, we have;

Heat required = 150 g × 2260 J/g = 339,000 J = 339 kJ

4. To convert 42.0 grams of boiling water to steam, we have;

Heat required = 42.0 g × 2260 J/g = 94,920 J = 94.92 kJ

5. The specific heat capacity of steam is 1.996 J/(g·°C)

The heat, Q, required to raise a given mass, m, of steam by Δt °C is given as follows;

Q = m × c × Δt

The heat required to raise the temperature of 422 grams of steam from 110.0 °C to 135.0 °C is therefore;

Q = 422 g × 1.996 J/(g·°C) × (135.0 °C - 110.0 °C) = 21057.8 J

The heat required to raise the temperature of 422 grams of steam from 110.0 °C to 135.0 °C = 21057.8 J = 21.0578 kJ

Primary source documents that can confirm the use of buttonhooks in the medical inspection of immigrants include medical reports and journals, photographs, and immigration records.

To confirm the use of buttonhooks in the medical inspection of immigrants, one can refer to primary sources such as medical reports and journals from the early 20th century.

These documents may contain descriptions of the medical examinations performed on immigrants and the tools used during the process. Photographs taken during this time may also provide evidence of the use of buttonhooks or other medical instruments.

Additionally, immigration records from the time may contain information on the medical inspections conducted on immigrants, including details on the tools used.

By consulting a variety of primary source materials, researchers can gather evidence that supports the historical use of buttonhooks in the medical inspection of immigrants.

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Answer:

just getting 5 points

Explanation:

Answer:it is Deposition

Deposition is the laying down of sediment carried by wind, water, or ice. Sediment can be transported as pebbles, sand & mud, or as salts dissolved in water. Salts may later be deposited by organic activity (e.g. as sea-shells) or by evaporation.

Explanation:

Answer: C. Deposition

Explanation:

Sodium salt might not be prepared by double decomposition because the method is used in preparing insoluble salts.

Double decomposition method serves as the method that is used in preparing compounds which entails reaction between two soluble compounds and after reaction soluble and insoluble products are produced.

Therefore, since most of the sodium salt are soluble salt , Double decomposition cannot be used to prepare them.

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Answer:

Force required = 600 N

What is Work?

Work is the energy transferred to or from an object via the application of force along a displacement or distance.

Work is calculated as the product of the force strength and the distance travelled. i.e, W = Fd.

∴ W = Fd

3600 = F×6

F = 600 N

Answer: A

Explanation:

Answer:

The answer is A

Explanation:

Answer:

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Explanation:

Answer:

If the mass of carbon in the signature is 10-12g, calculate. the number of carbon atoms in the signature. the answer is 5.01 x 10^10 atom.

Explanation:

wlcm

please mark me as brainliest

Answer:

If Black Holes Are "Black," How Do Scientists Know They Are There? A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole.

Explanation:

some examples; 1. Pushing a wheel barrow.

2. Opening or closing a door.

3. Squeezing wet clothes.

4. Gravitational force.

5. Brakes applied to stop a moving vehicle.

6. A football kicked harder that decreases due to the frictional force.

7. Rubbing a glass rod with a silk.

8. Pressure applied on a pin of a notice board.

9. Running

10. Pushing

Supernova or void is another force or phenomenon that cannot be seen directly similar to black holes.Examples of the effects are gravitational force, brakes applied to stop a moving vehicle.

Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.

It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.

The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.

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Answer:

Atomic mass = proton + neutron

31+33= 64

Number of proton = Atomic number = 31

Charge of element is +3

Explanation:

When adding ice to a hot soup, it is generally recommended to use ice made from potable or drinkable water.

The water used to make the ice should be clean and free from any contaminants that could affect the taste or safety of the soup.

It is advisable to use filtered or purify water to make the ice to ensure that it is of good quality. This helps prevent any unwanted flavors or impurities from transferring to the soup.

Using tap water can also be acceptable if it meets the drinking water standards in your area and is considered safe for consumption. However, if you have concerns about the quality of your tap water, using filtered water is a safer option.

Ultimately, the goal is to add ice made from water that is safe and of good quality to avoid any negative impact on the taste or safety of the soup.

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Explanation:

The atoms on the periodic table are grouped according to having similar properties. Therefore, atoms of group 15 has 5 valence electrons.

Answer:

The last option is correct.

The five correct steps on oxidative decarboxylation of pyruvate are:

These steps are correct in the process of oxidative decarboxylation of pyruvate, because they describe the complete process of pyruvate decarboxylation, from the initial conversion of pyruvate to hydroxyethyl-TPP, to the transfer of the acetyl group to CoA, to the reoxidation of FADH2. This sequence of steps ensures that the energy from the oxidation of pyruvate is captured and stored as energy-rich molecules, such as NADH and acetyl-CoA.

Is a type of metabolic reaction in which a carboxylic acid is converted into an aldehyde, alcohol, or ketone by the addition of an oxidizing agent, such as oxygen or a metal compound.

This reaction involves the removal of a carboxyl group (COOH) and the addition of an oxygen atom (O). The resulting product contains either an aldehyde, alcohol, or ketone group, depending on the starting material.

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The enthalpy change (ΔH) for the physical change of Br2 from the gas phase to the gas phase (Br2(g) → Br2(g)) is zero. The entropy change (ΔS) for this physical change is also zero.

In a physical change, the chemical substance remains the same, and there is no breaking or forming of chemical bonds. In the case of Br2 going from the gas phase to the gas phase, there is no change in the chemical identity or composition of the substance.

The enthalpy change (ΔH) measures the heat energy transfer during a reaction or process. Since there is no change in the chemical bonds or composition of Br2 in this physical change, there is no transfer of heat energy, and thus ΔH is zero.

The entropy change (ΔS) quantifies the degree of disorder or randomness in a system. In this physical change, the arrangement and distribution of Br2 molecules remain unchanged, leading to no change in entropy. Therefore, ΔS is also zero.

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Answer: It changed in identity and properties.

Explanation:

Answer:

C: It changed in identity and properties

Explanation:

Hope this helps! good luck :)