Provide an expression in which the rate of production of N₂O₂ is set equal to the rate of consumption of N₂O₂.

Answer:

I`m pretty sure that B is right

Explanation:

Answer:

(4) He

Explanation:

First would be (1) H Then (2)H and would have to be (4)He

When mercurous nitrate paper is exposed to ammonia gas then black color is produced due to the formation of Hg₂NH₂NO₃ + Hg.

The reaction of mercurous nitrate paper with ammonia gas produces the compound mercury amidonitrate and mercury metal.

This mercury amidonitrate contains the mercury I ion (Hg2^+). Since the compound contains mercury I ion, mercury amidonitrate  has the formula; Hg₂NH₂NO₃.

The compounds formed therefore are; Hg₂NH₂NO₃ + Hg

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Answer:

The correct option is;

c. Bromine, zinc, calcium, radium

Explanation:

The atomic radii of the elements as arranged in the periodic table decreases across the period and increases down the groups

The location of each of the elements are;

Zinc: Period 4, Group 12

Calcium: Period 4, Group 2

Radium: Period 7, Group 2

Bromine: Period 4, Group 17

Therefore, the element with the largest atomic radius = Radium

The element with the smallest atomic radius = Bromine

Calcium comes before zinc on period 4, therefore, the atomic radius of calcium is larger than that of zinc

The rank of the elements from smallest to largest atomic radius is therefore;

Bromine, zinc, calcium, radium.

The molecular mass of a compound is the sum of the atomic masses of all the atoms in a molecule. It is calculated by adding up the atomic masses of each element in the compound, as indicated by its molecular formula.

On the other hand, the formula mass is the sum of the atomic masses of all the atoms in a formula unit of an ionic compound. It is calculated in a similar manner as the molecular mass, but instead of using the molecular formula, we use the empirical formula or the simplest ratio of elements in the compound.

To differentiate between the two, molecular mass is used for covalent compounds, where atoms are held together by covalent bonds, while formula mass is used for ionic compounds, where ions are held together by ionic bonds.

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Answer:

D

Explanation:

Substance A is mixed with water and donates 0.4% of its H⁺ ions, therefore given substance is a weak acid & show poor conduction of electric current.

According to the Arrhenius theory of acids and bases, acids are those species which gives H⁺ ion to the solution.

In the question it is given that, substance A is mixed with water and it donates H⁺ ion, from this it is clear that given substance is acid. It is also mention that it donates only 0.4% of its H⁺ ion means partial dissociation is observed, so we conclude that this acid is weak in nature. And due to weak dissociation and less number of available H⁺ ion it did not conduct electricity effectively.

Hence, option (D) is correct i.e. it is weak acid and a poor conductor of electric current.

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Answer: B

Explanation:

The ratio for [C\(_5\)H\(_5\)N]/[C\(_5\)H\(_5\)NH⁺] if the solution has the following pH values 4.50 is 6.30.

A buffer is indeed a solution that resists pH fluctuations and contains either a weak acid as well as its salt or perhaps a weak base as well as its salt. To put it another way, a buffer is indeed an aqueous solution that includes a weak base as well as its conjugate acid, or a weak acid as well as its conjugate base.

A buffer may also be referred to as a buffer solution, hydrogen ion buffer, and pH buffer.

pOH =PKb+log[salt]/[base]

pOH =14-pH= 14-4.50=9.5

pKb= -logKb

     =-log(1.7×10⁻⁷)

     =8.7

9.5 =8.7+log[salt]/[base]

9.5 -8.7=log[salt]/[base]

0.8=log[salt]/[base]

[salt]/[base] =10^0.8=6.30

[C\(_5\)H\(_5\)N]/[C\(_5\)H\(_5\)NH⁺]=6.30

Therefore, 6.30 is the value for [C\(_5\)H\(_5\)N]/[C\(_5\)H\(_5\)NH⁺].

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In this question, we have:

31.1 grams of O2

84.3 grams of F2

94.9 L of total volume

55.77°C of temperature which is equal to 328.92 K

Now, to find the pressure of this container, we can find the number of moles of each gas, and add both values together making it one value of moles and then we will use the Ideal gas law to find the pressure, so let's start with O2

The molar mass of O2 is 32g/mol and we have 31.1 grams

32g = 1 mol

31.1g = x moles

x = 0.972 moles of O2

Now for F2, the molar mass is 38g/mol, and we have 84.3 grams

38g = 1 mol

84.3g = x moles

x = 2.22 moles of F2

Now we add these values, 0.972 + 2.22 = 3.192 moles

And now we can use the ideal gas law formula:

PV = nRT

Remember that R is the gas constant, 0.082

P * 94.9 L = 3.192 * 0.082 * 328.92

94.9P = 86.1

P = 0.91 atm

Answer:  No, the samples are not of equal masses.

Explanation:  Mass is volume X density

A:  (2ml)*(18.4g/ml) = 36.8 g

B:  (5ml(*(35.5g/ml) = 177.5 g

The gas in aerosol can is under the pressure of 304 kPa  at the temperature of 298 K. The pressure in the aerosol can be at the temperature of 1118 K is 11.2 atm.

The initial pressure,  P₁ = 304 kpa = 3 atm

The finial pressure, P₂  = ?

The initial temperature , T₁ = 298 K

The final temperature, T₂ = 1118 K

The expression is as follows :

P₁  / T₁ =  P₂  / T₂

P₂ = ( P₁ T₂) / T₁

P₂ = ( 3 × 1118) / 298

P₂ = 11.2 atm

Thus, the final pressure is 11.2 atm.

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Scotus is considering whether the escape of heat from an individual's home should pass subjective and objective privacy test.

Subjective test is based on the opinion which is given while the objective test is based on the answers given which could be right or wrong.

In this type of scenario, heat escaping from an individual's home may be as a result of boiling water or a fire incident.

Privacy of individuals isn't meant to be intruded which is why the test may be a subjective or objective one thereby making it the most appropriate choice.

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d= m/v

1.0=m/1cm^3

1.0×1cm^3=m

m=1kg/cm^3

Answer:

OD. Ka = 1.62 × 10-12

Explanation:

An acid is weak the smaller the Ka value, so the weakest acid in this case is the one with a Ka=1.62 × 10-12.

Answer: DUHHHHH!

Explanation:

Quantitative Qualitative

Male parrotfish 1.3 meters in length

Brain coral over 2 meters in circumference

Sea anemone tentacles have an average length of 7 cm

Qualitative

Angelfish has swirl patterns of black and white

Angelfish swimming in large schools

Male parrotfish has large scales and scar near base of

tail fin

Scar on parrotfish may have been caused by a bite from

another fish

Parrotfish is afraid of brain coral because the fish will

not touch the coral

Sea anemone have purple tipped tentacles

My hand brushed up against sea anemone tentacle and

it began to hurt

Most of the sand near the coral reef has been washed

away by the tide

Few divers visit this coral reef because there is no litter

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Atomic excitation and de-excitation have various applications across different fields.

Some notable applications include:

Lighting technology: Exciting atoms in gas-filled tubes or bulbs can produce different colors of light. For example, neon signs use excited neon atoms to emit bright red-orange light.

Lasers: The principle of stimulated emission, which involves the excitation and de-excitation of atoms, is fundamental to laser technology. Lasers are used in numerous applications such as telecommunications, medical procedures, scientific research, and industrial processes.

Atomic clocks: Precise timekeeping relies on the stable and predictable transitions between energy levels in atoms. Atomic clocks use atomic excitation and de-excitation processes to measure time accurately, providing the basis for global timekeeping standards.

Spectroscopy: The study of atomic excitation and de-excitation is essential for spectroscopic techniques. By analyzing the emitted or absorbed light during these processes, scientists can identify and study the composition, structure, and properties of substances.

Nuclear energy: Nuclear power plants utilize controlled atomic reactions, including excitation and de-excitation processes, to generate electricity. Excited atomic nuclei release energy in the form of heat, which is then converted into electrical energy.

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Everyday, save water. Reduce the length of your showers, patch any leaks, and switch off the flow when you're not using it. Instead of disposing of hazardous household chemicals into the drain, transport them to the a hazardous waste facility. Use resilient plants in your yard that require little to no watering, fertilizer, or pesticides.

Arthropods, including insects, are killed by insecticides. Mites can feed on both plants and animals are eliminated with miticides, also known as acaricides. Microorganisms known as microbial pesticides can kill, prevent, or outcompete pests like insects or even other microorganism pests.

Pesticides can have both acute, or short-term, negative health impacts, and chronic, or long-term, consequences, which can develop years or months after exposure. Examples of immediate health consequences include eye stinging, blisters, rashes, blindness, nausea, lightheadedness, diarrhea, and even death.

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Answer: The answer is : using a broom, and picking up litter  and pet waste.

Explanation: I just took the test and got a 100%,! that was my answer.

Answer:

the symbol of an iron is Fe (ferous, feric).

Answer:

A. When water moves into a crack and freezes, it expands and forces the crack wider.

Explanation:

A crack in a rock can fill with water which then freezes as the temperature drops. As the ice expands, it pushes the crack apart, making the crack larger. When the temperature rises again, the ice melts, and the water fills the newer parts of the crack. Once the water freezes again when the temperature drops, the expansion of the ice causes further expansion to the crack.

Answer:

i got another way forget the question thing

Explanation:

All of the properties such as ice floating on water, while most solids would sink when placed in its liquid are all due to the structure of the compounds.

The structure of the compounds includes the bonding angle, the type of bonds, the size of the molecule,  the interactions between the molecules etc.  Slight changes in the chemical structure and affect the properties if the compound.

Isomeric compounds with the same  chemical formula but different structures can have different melting and boiling point and differ in reactivity and flammability.

Another common change in isomers are with the double bonds.  A double bond can be in the cis formation or in the trans formation, and this will affect its properties as trans isomers will be having high melting point than the cis isomer.

Thus, structure of compounds  do determine the properties of the compounds.

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Explanation:

he has no controlled variables

The first mistake that the student made is drawing the start line with ink. So it will run/dissolve in the solvent / split up

The second mistake that the student made is placing the solvent above the spots or start line instead of under them. So they will mix with solvent or wash off paper or color the solvent or dissolve in the solvent.

In the first mistake, there is no clear, visible starting line for the experiment as the ink flows or dissolves in the solvent. This error can lead to confusion and inaccuracy in results as students cannot accurately measure or compare the progress of their experiments.

The second mistake, it mixes or washes away the solvent with the dirt and starts the line, making it difficult or impossible to observe or measure the progress of the experiment. This error can also lead to inaccuracies in results, as students may not be able to accurately measure or compare the progress of their experiments.

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1. Water molecules approach isopropanol molecules. 2. Intermolecular forces between water and isopropanol molecules weaken and break. 3. Water molecules insert themselves between isopropanol molecules. 4. Water molecules surround and solvate the isopropanol molecules. 5. Isopropanol molecules fully dissolve in the water solution.

Here's a step-by-step explanation of what happens on the molecular level when water is added to liquid isopropanol to form a solution of rubbing alcohol:

1. The water and isopropanol molecules are both polar, meaning they have regions of positive and negative charges.
2. As water is added to the isopropanol, the polar water molecules begin to interact with the polar isopropanol molecules.
3. The positive region of a water molecule (hydrogen) is attracted to the negative region of an isopropanol molecule (oxygen).
4. Similarly, the negative region of a water molecule (oxygen) is attracted to the positive region of an isopropanol molecule (hydrogen).
5. These attractions, known as hydrogen bonds, cause the water and isopropanol molecules to mix and form a homogeneous solution.
6. The water effectively dissolves in the isopropanol as their molecular interactions create a uniform mixture.

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The ferric chloride test for phenols indicates that both the crude and recrystallized samples of aspirin are pure.

The ferric chloride test is a qualitative test that helps to identify the presence of phenols in a given sample. When ferric chloride is added to a phenolic compound, it forms a colored complex. In this experiment, both the crude and recrystallized samples of aspirin produced a negative result for the ferric chloride test, indicating the absence of phenols. This suggests that both samples are pure and do not contain any impurities that could interfere with the test.

It is important to note that the ferric chloride test is not a definitive test for the presence of phenols, as other compounds may also produce a positive result. However, a negative result is a good indication of the absence of phenols.

In addition, the purity of the samples can also be confirmed through other tests such as melting point determination and TLC analysis. Overall, the absence of phenols in the crude and recrystallized samples of aspirin suggests that the purification process was successful in removing impurities.

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Answer:

48 mph

Explanation:

divide time by distance - 20/25 = .8 miles per minute, multiple by 60 to get mph

The balanced for the reaction is:

2KI + Pb(NO₃)₂ → Pbl₂ + 2KNO₃

When the equation is balanced, the number of atoms for each element on both the reactant and product sides of the equation are equal. This can be seen below:

      Reactant   Product

K         2                 2

I          2                  2

Pb      1                    1

N       2                   2

O       6                  6

Answer:

mineral

vitamins

carbohydrates

protien

fat