The industrial production of hydroiodic acid takes place by treatment of iodine with hydrazine N2H4: 2I2 + N2H4 = 4HI + N2 a) how many grams of I2 needed to react with 36. 7 g of N2H4? b) how many grams of HI are produced from the reaction of 115. 7 g of N2H4 with excess iodine?

The average atomic mass of the element is 204.40 amu

Average atomic mass = sum of isotopic mass * abundance of each isotope

Average atomic mass = 202.99 * 29.524% + 70.476% * 204.99 amu.

Average atomic mass = 204.40 amu

Therefore,  the average atomic mass of the element is 204.40 amu

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Answer:

The boiling point of water at sea level is 100 degrees Celsius, or 212 degrees Fahrenheit.

The mole fraction of NH₃ in the solution is 0.076. The mole fraction is a way of expressing the concentration of a component in a solution. It is defined as the number of moles of a particular component divided by the total number of moles in the solution.

To determine the mole fraction of  NH₃ in the solution, we need to first calculate the total mass of the solution.

Total mass of solution = mass of  NH₃ + mass of water

Total mass of solution = 15.0g + 250g

Total mass of solution = 265.0g

Next, we can use the density of the solution to calculate its volume:

Density = mass/volume

0.974 g/ml = 265.0g/volume

Volume = 272.11 ml

Now we can use the mass of  NH₃ and the total volume of the solution to calculate the mole fraction of  NH₃:

Mole fraction of  NH₃= moles of  NH₃/total moles in solution

To find the moles of  NH₃, we need to first convert the mass of  NH₃ to moles using its molar mass:

Molar mass of  NH₃ = 14.01 g/mol

Moles of  NH₃= 15.0g / 14.01 g/mol

Moles of  NH₃= 1.07 mol

To find the total moles in the solution, we need to use the density and the molar volume of water (which is 18.02 mL/mol at room temperature and pressure):

Volume of water = total volume - volume of  NH₃

Volume of water = 272.11 ml - (15.0g / 1.00 g/ml)

Volume of water = 257.11 ml

Total moles in solution = (257.11 ml / 1000 ml/L) * (1 L/1000 ml) * (1 mol/18.02 L)

Total moles in solution = 0.014 mol

Now we can calculate the mole fraction of  NH₃:

Mole fraction of  NH₃= 1.07 mol / 0.014 mol

Mole fraction of  NH₃= 0.076

Therefore, the mole fraction of  NH₃ in the solution is 0.076.

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It have no definete points, with high kinetic energy ions, and called supercooled liquid.

When the constituent particles of a solid lack a regular three-dimensional configuration, the solid is said to be amorphous.

Crystalline solids are described as having highly organised arrangements of their atoms, ions, and molecules in tiny structures.

Amorphouse solids do not have definite no definite points and do not share the same wanderwal forces, so some of their particles melt faster than the other

Some substances that are normally crystalline may become amorphous if they are bombarding it with high-kinetic-energy ions.

A substance that retains certain liquid characteristics, even at temperatures at which it appears to be a solid is a super cooled liquid.

matches to the respective questions:

cubic= a

tetragonal= e

hexagonal =d

trigonal= f

orthorhombic= g

monoclinic= b

triclinic= c

simple cubic= i

face-centered cubic= h

body-centered cubic= j

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Answer:

it will have 6 valence electrons

it will gain electrons

charge will be 2-

Answer:

C

Explanation:

Answer: The answer is C

Explanation:

The technique used to separate calcium carbonate from a mixture of calcium carbonate and water is called filtration.

This method involves pouring the mixture through a porous substance, such as filter paper, to keep the solid calcium carbonate in place while allowing water to pass through. After being collected and dried, the resultant residue on the filter paper can be used to make pure calcium carbonate.

Decantation and sedimentation are other potential methods. In this method, the mixture is left to remain for a while, during which the calcium carbonate particles gravitationally sink to the bottom. The calcium carbonate sediment can then be removed by carefully pouring out or decanting the clear water at the top.

Keep in mind that the technique used will rely on the unique characteristics of the combination and the desired level of calcium carbonate purity. Depending on the circumstances, other methods may also be utilized, such as evaporation or centrifugation.

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Answer:

C. Battery acid burning the floor

Explanation:

C. Battery acid burning the floor

in combustion fire is created

Battery acid burning the floor is NOT an example of combustion occurring.

The answer is option C.

Combustion is a chemical process or a reaction between the gas (Hydrocarbon) and Oxygen. while gasoline and oxygen react it releases warmth and light energy. heat and light energy then result in the flame. So, the system for Combustion reaction is Hydrobcarbon + Oxygen = warmness electricity.

Combustion in daily existence examples is: Burning of wooden or Coal for the family functions. Burning of Petrol or Diesel for using vehicles like vehicles. Combustion of herbal gas or LPG.

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Answer: 2 moles of sodium bicarbonate is required for each mole of H2SO4. Originally Answered: How many moles of sodium bicarbonate are needed to neutralise 0.8 ml of sulphuric acid at STP?

Explanation:

The 0.03 moles of sodium bicarbonate are needed to neutralize 0.8ml of sulfuric acid at STP.

Calculation,

Let's consider 0.8ml = 100% pure

Density of 100% pure sulfuric acid = mass/volume = 1.839 g/ml

Mass of  0.8ml sulfuric acid = 1.839 g/ml ×   0.8ml = 1.47 g

Moles of sulfuric acid = given mass/ molar mass = 1.47/98 = 0.015 moles

Chemical equation is written as,

\(2NaHCO_{3} + H_{2}SO_{4}\)→\(Na_{2}SO_{4} +2H_{2}O+ 2CO_{2}\)

The mole ratio is 2:1

it means two moles of sodium bicarbonate are needed to neutralize 1 mole of sulfuric acid.

So,  0.015 moles of sulfuric acid need 0.015 × 2  moles of sodium bicarbonate.

So,  0.03 moles of sodium bicarbonate are needed to neutralize 0.015 moles of sulfuric acid at STP.

The reaction in which acid and base combine to form complete salt and water is called neutralization reaction.

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                         4

-----________-------_________------

The name of the compound with the formula CoP is Cobalt phosphide.

Chemical reactions between cobalt and other elements result in cobalt compounds. The +2 oxidation state of cobalt is the most stable one in the complex, while there exist stable compounds with +3 valence when certain ligands are present. Furthermore, cobalt compounds exist in low oxidation states (-1, 0) and high oxidation states (+4, +5).

An inorganic substance having the chemical formula Co3P2 is cobalt(II) phosphide.

The number of atoms in each element of a compound is revealed by the chemical formula. It includes the symbols for the atoms of each element found in the compound, together with a count of how many of each element there are overall in the form of subscripts.

A semiconductor called cobalt phosphide is employed in laser diodes as well as high power and high frequency applications.

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Answer:

Heat, in the form of thermal energy, naturally moves from warmer substances to colder ones. When the ocean is warmer than the atmosphere, it transfers heat — through conduction and radiation — to make the air warmer. ... This redistributes thermal energy and causes changes in the weather.

Answer:

a . Mixture

Explanation:

When solids, liquids and gases mix with one another, the product is usually a mixture.

Mixtures are classified as impure substances because:

Pure substances are elements and compounds with typically definite compositions.

So, when substances in different phases combines, an heterogeneous mixture is produced.

Answer:

The balloon transport system or Hot Air Balloon is one of several transportation methods in RuneScape. During the Enlightened Journey quest it can be used for travel between two locations. After the quest is complete, four more locations are available to be unlocked by completing respective journeys to those locations.

Explanation:

transportation

Answer:

A. can be separated by physical means.

Explanation:

A mixture is when two different materials are put in the same container and no reaction occurs.

Answer:

(a) The maximum amount of work that can be obtained from the first galvanic cell is -510.5kJ.

(b) The maximum amount of work that can be obtained from the second galvanic cell is -318.5kJ.

Explanation:

In this question, we need to use the standard reduction potentials to calculate the standard cell potential of each galvanic cell, and then use the formula AG = -nFE to calculate the maximum amount of work that can be obtained from each galvanic cell.

Solve the Problem

(a) Cr₂02 +14H++6e → 2Cr³++7H₂O

The standard reduction potential of Cr2O2 is 1.33V, and the standard reduction potential of His 0V. Therefore, the standard cell potential of this galvanic cell is:

E cell = reduction (Cr202) - E reduction (H+) = 1.33V

The number of electrons transferred in this reaction is 6, so the maximum amount of work that can be obtained from this galvanic cell is:

AG= -nFE = -696485C/mol 1.33J/C = −51

(b) 2H+ + 2e→ H₂

The standard reduction potential of H+ is 0V, and the standard reduction potential of Al3+ is -1.66V.

Therefore, the standard cell potential of this galvanic cell is:

EO =E0 cell reduction (H+)-E0 reduction (A13+) = 0V – (−1

The number of electrons transferred in this reaction is 2, so the maximum amount of work that can be obtained from this galvanic cell is:

AG-nFE-2 96485C/mol 1.66J/C-31

Draw the Conclusion

(a) The maximum amount of work that can be obtained from the first galvanic cell is -510.5kJ.

(b) The maximum amount of work that can be obtained from the second galvanic cell is -318.5kJ.

Answer:

Na+ lost one electron:    1s2 2s2 2p6

Cl- gained an electron:   1s2 2s2 2p6 3s2 3p6

Explanation:

Answer:

Im not sure how to get it off but i know if you put like some make up or foundation it will cover it.

Explanation:

Are you being abused

Answer

Conditions that would favour the production of nitrogen monoxide.

1. Changing of concentration

If you add more concentration of the reactants, the forward reaction will be favoured, the reaction will shift to the right, therefore more NO will be produced, to restore the equilibrium.

2. Changing of temperature

Since this reaction is exothermic (since heat is the product), if the temperature is decreased, the reaction will shift forward, meaning it will shift to the right, this will then produce more NO.

3. Changing the volume/pressure

If we increase the volume, meaning if we decrease the pressure, the reaction will shift towards the side with more particles, the forward reaction has more particles, so the equilibrium will shift to the right and produce more NO.

Answer:

C

Explanation:

Because how would you know what the reaction rate is and how it is affected by the concentrations

The information that the rate constant give from the rate law is it tells how much the reaction rate is affected by activation energy.

Hence, Option (D) is correct answer.

The rate law is also known as rate equation which is defined as the law which is used to predict the relationship between the rate of the reaction and the concentration of the reactants participating in it.

It is expressed as

Rate = k [A]ˣ [B]ⁿ

where,

k is rate constant

A is concentration of species A

x is order of reaction w.r.t A

B is concentration of species B

n is order of reaction w.r.t B

Thus from the above conclusion we can say that The information that the rate constant give from the rate law is it tells how much the reaction rate is affected by activation energy.

Hence, Option (D) is correct answer.

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When 60.0 g of carbon is burned in 160.0 g of oxygen, 220.0 g of carbon dioxide is formed. 60.0 g mass of carbon dioxide is formed when 60.0 g of carbon is burned in 750.0g of oxygen.

To solve this problem, we can use the concept of stoichiometry and the balanced chemical equation for the combustion of carbon to form carbon dioxide. The balanced equation is as follows:

C + O₂ → CO₂

According to the equation, one mole of carbon reacts with one mole of oxygen to produce one mole of carbon dioxide.

Calculate the number of moles of carbon and oxygen in the given scenario:

Molar mass of carbon (C) = 12.01 g/mol

Molar mass of oxygen (O₂) = 32.00 g/mol (16.00 g/mol × 2)

Number of moles of carbon = Mass of carbon / Molar mass of carbon

Number of moles of carbon = 60.0 g / 12.01 g/mol = 4.998 mol (rounded to three decimal places)

Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen

Number of moles of oxygen = 750.0 g / 32.00 g/mol = 23.438 mol (rounded to three decimal places)

Since the balanced equation shows a 1:1 ratio between carbon and carbon dioxide, we can infer that 4.998 moles of carbon will produce 4.998 moles of carbon dioxide.

Now, using the molar mass of carbon dioxide (44.01 g/mol), we can calculate the mass of carbon dioxide produced:

Mass of carbon dioxide = Number of moles of carbon dioxide × Molar mass of carbon dioxide

Mass of carbon dioxide = 4.998 mol × 44.01 g/mol = 219.92 g (rounded to two decimal places)

Therefore, when 60.0 g of carbon is burned in 750.0 g of oxygen, approximately 219.92 g of carbon dioxide is formed.

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Answer:

Plantae. Plants are multicellular and most don't move, although gametes of some plants move using cilia or flagella. Organelles including nucleus, chloroplasts are present, and cell walls are present. Nutrients are acquired by photosynthesis (they all require sunlight).

Answer:

Two ions that produced similar colors in the flame test were Ca+2 and Sr+2. 3.

Explanation:

The colors are produced when an electron jumps to a higher level and then jump back down.

Ba2+ and Cu2+ and Sr2+ and Li+ were the pair with the similar color. Sr and Li displayed red colors, while Ba and Cu had mild greenish yellowish hues.

Why do some ions in the flame test generate colors that are similar?

The precise sizes of the potential energy jumps differ from metal to metal. As a result, the flame color of each metal will differ due to its unique spectral line pattern. The movement of the electrons in the metal ions contained in the compounds results in the hues of the flame.

The energy released by each electron when it returns to its initial condition determines the hue of the light that is produced.

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The type of reaction that occurs without the addition of heat is called spontaneous reaction. That is option D.

Spontaneous reaction is defined as the reaction where by new substances are formed naturally without the addition of extra energy in the form of heat.

Therefore, the type of reaction that occurs without the addition of heat is called spontaneous reaction

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Rainforests are not generally considered a source of none of the above choices. You can get food from Rainforests, and also spices and medicines. In fact, Rainforests have a variety of plants that have medicinal properties. When you know how to find the right plant in the rainforests, you can access almost everything.

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Answer:

D. None of the above

Explanation:

trusttt

A polar solvent is prepared by mixing 27.5 mL of propanone with 222.5 mL of water the percentage by volume of propanone in the mixture is 11%.

The percentage by volume of propanone in the mixture can be calculated as follows:

Find the total volume of the mixture:

Total volume = volume of propanone + volume of water

Total volume = 27.5 mL + 222.5 mL

Total volume = 250 mL

Calculate the volume fraction of propanone:

Volume fraction of propanone = volume of propanone / total volume

Volume fraction of propanone = 27.5 mL / 250 mL

Volume fraction of propanone = 0.11

Convert the volume fraction to a percentage:

Percentage by volume of propanone = volume fraction of propanone x 100%

Percentage by volume of propanone = 0.11 x 100%

Percentage by volume of propanone = 11%

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