The decomposition of nitrogen dioxide is described by the following chemical equation:
2NO_2 (g) --------> 2NO (g) + O_2 (g)
Suppose a two-step mechanism is proposed for this reaction, beginning with this elementary reaction:
NO_2 (g) --------> NO_(g) + O_(g)
Suppose also that the second step of the mechanism should be bimolecular.
a) Suggest a reasonable second step. That is, write the balanced chemical equation of a bimolecular elementary reaction that would complete the proposed mechanism.

Answer:

For deposition to happen, thermal energy must be removed from the gas. ... As water vapor loses thermal energy, it changes into solid frost. States of Water. Water is the only substance that exists naturally as a solid, a liquid, and a gas within Earth's temperature range.

Explanation:

Answer:

9.8 × 10^21

Explanation:

Equation of the reaction;

Cd(s) + Ni^2+(aq) ----> Cd^2+(aq) + Ni(s)

E°cell= E°cathode - E°anode

E°cathode= -0.25 V

E°anode = -0.40 V

E°cell= -0.25 - (-0.40)

E°cell = 0.65 V

∆G= -nFE°cell

∆G= -(2 × 96500 × 0.65)

∆G = -125450 J

From;

∆G= -RTlnK

lnK = ∆G/-RT

K= e^∆G/-RT

K= e^-[-(125450/8.314 × 298)]

K= 9.78 × 10^21

Answer:

enzymes

Explanation:

sorry if I am wrong, have a nice day/night

Answer:

amino acids - enzyme is a protein that can control the rate of biochemical reactions

Density differences caused by temperature and salinity variations are fundamental drivers of ocean currents of seawater . Warm currents transport heat from the equator to higher latitudes, while cold currents transport cold water from higher latitudes to lower latitudes.

When seawater is heated, it expands and becomes less dense, causing it to rise. Conversely, when seawater cools, it contracts and becomes denser, causing it to sink. These density differences due to temperature variations create vertical movements in the ocean known as thermohaline circulation or convection currents. On the other hand, regions with high freshwater input from rivers or heavy precipitation have lower salinity, resulting in lower density. This lighter water tends to float on the denser seawater beneath it, leading to the formation of surface currents that transport water from areas of low salinity to areas of higher salinity. These ocean currents play a vital role in shaping global climate patterns and maintaining the balance of heat and nutrients in the ocean ecosystem.

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Answer:

The real acidity of milk is due to lactic acid. This is never found in milk when it is first drawn from the udder. It is produced by the action of the lactic acid organisms on the milk sugar. The so-called apparent acidity of milk is what gives fresh milk its acid reaction.

Answer:

The octet rule is a chemical rule of thumb that reflects the observation that main group elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas

Explanation:

The molarity of the NiSO₄ solution made by dissolving 38.81 grams of nickel (ii) sulfate, NiSO₄, in enough water to make 0.467 liters of solution is 0.535 M

First, we shall obtain the mole of 38.81 grams of nickel (ii) sulfate, NiSO₄. Details below:

Mole of NiSO₄ = mass / molar mass

= 38.81 / 154.75

= 0.25 mole

Now, we shall determine the molarity of the solution. Details below:

Molarity of solution = mole / volume

= 0.25 / 0.467

= 0.535 M

Thus, the molarity of the solution is 0.535 M

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Sharla finds a container labeled tungsten and Sharla found 2.05 moles of tungsten in the container.

Mole is the amount of substance of a system that contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12 and its symbol is “mol”. One mole of substance is equal to the value of 6.023 x 10^23 (Avogadro's number). It can be used to measure the products obtained from chemical reaction.

As, number of moles is mass / molar mass

so, molar mass of tungsten is 183.84 g/mol.

the number of moles of tungsten that Sharla found would be:

number of moles = 377.64 g / 183.84 g/mol = 2.05 mol

Therefore, Sharla found 2.05 moles of tungsten in the container.

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In this question, we have to calculate the age of a fossil after the decay of Carbon-14 436 times, with a half-life of 5730 years, and in order to do that, we can multiply both values, one example to understand this step better is:

Let's say we have a 2 times decay of a certain amount of Carbon-14, we can say that 11,460 years have passed by, and we can check it:

x grams of C 14 = 0 years

x/2 grams of C 14 = 5730 years, 1st decay

x/4 grams of C 14 = 11460 years, 2nd decay

Therefore with 436 decays

5730 * 436 = 2,498,280 years this is the age of this fossil

Part B:

For this part, we will need to use the Half-Life formula, which is the following:

N(t) = N0(1/2)^t/t1/2

Where:

N(t) = quantity of the substance remaining, 2.2*10^-78

N0 = initial quantity of the substance

t = time elapsed, 2,498,280 years

t1/2 = half life of the substance, 5730 years

Now we add these values into the formula:

2.2*10^-78 = N0(1/2)2,498,280/5730

2.2*10^-78 = N0(1/2)^436

2.2*10^-78 = 5.63*10^-132N0

N0 = 2.2*10^-78/5.63*10^-132

N0 = 3.91*10^53 was the initial quantity

Answer:

Trimethylpentane

Explanation:

(CH3)3CCH2CH(CH3)2 would represent Trimethylpentane!

In order to determine whether there is a significant difference between two samples, the Student's t-test examines their mean and standard deviation.

A significant t-score, also known as a t-value, denotes a difference between the groups, whereas a small t-score denotes similarity. Degrees of freedom are the values in a research that have the flexibility to change, and they are crucial for determining the significance and reliability of the null hypothesis.

This test is used when specimens from two distinct populations, species, or groupings are compared and analyzed. The independent T-test is another name for it.

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Explanation:

Well,

Light travels approximately 1 foot per nanosecond or 186 miles per millisecond or 300,000 kilometers per second.

Hope this helps!

Mercury (I) phosphate with the chemical formula  (Hg2)3(PO4)2 has 16 atoms.

Sum of all the atoms = 6+2+8

                                   = 16 atoms

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Answer:

False is the correct answer to this question

Answer:

A. The reaction shifts to the right (products) and the concentrations of I and H₂ decrease.

Explanation:

If gas is removed from the system at equilibrium, the system will try to compensate for the loss by shifting the reaction in a direction that produces more gas molecules. This is known as Le Chatelier's principle, which states that a system at equilibrium will respond to a disturbance by shifting in a way that minimizes the effect of the disturbance.

In this case, since gas is being removed from the system, the reaction will shift to the side that produces more gas molecules. Looking at the balanced equation, we can see that 2HI(g) has a greater number of gas molecules compared to H₂(g) and I₂(g). Therefore, the system will shift to the right (products) to produce more HI(g) and reestablish equilibrium.

Answer:So, about 0.093 g of the isotope will remain after 19.8 days.

Explanation:

The first step is to find the number of half-lives that have passed during 19.8 days:

Number of half-lives = time elapsed / half-life

Number of half-lives = 19.8 days / 3.8 days per half-life

Number of half-lives ≈ 5.21

This means that the initial amount of the isotope has been halved 5.21 times. The remaining fraction of the original amount can be calculated using the following formula:

Remaining fraction = (1/2)^(number of half-lives)

Substituting the values, we get:

Remaining fraction = (1/2)^5.21

Remaining fraction ≈ 0.031

Therefore, the amount of the isotope remaining after 19.8 days is:

Remaining amount = Remaining fraction x Initial amount

Remaining amount = 0.031 x 3.00 g

Remaining amount ≈ 0.093 g

So, about 0.093 g of the isotope will remain after 19.8 days.

The isotope in grams will remain after 19.8 days would be 0.081 grams.

The formula to calculate the left mass of a radioactive element can be deduced as -

\( \qquad\star\longrightarrow \underline{\boxed{\sf{m =m_{o} \times { \bigg(\dfrac{1}{2} \bigg)}^{ \dfrac{t}{T½}} }}} \\\)

Where-

According to the given specific parameters -

Now that we have all the required values, so we can plug them into the formula and solve for the left mass of a radioactive element-

\( \qquad \longrightarrow \sf \underline{m =m_{o} \times { \bigg(\dfrac{1}{2} \bigg)}^{ \dfrac{t}{T½} }} \\\)

\( \qquad\longrightarrow \sf m =3 \times { \bigg(\dfrac{1}{2} \bigg)}^{ \dfrac{19.8}{3.8} } \\\)

\(\qquad \longrightarrow \sf m =3 \times { \bigg(\dfrac{1}{2} \bigg)}^{ \dfrac{\cancel{19.8}}{\cancel{3.8}} } \\\)

\( \qquad\longrightarrow \sf m =3 \times { \bigg(\dfrac{1}{2} \bigg)}^{ 5.21052..... } \\\)

\( \qquad\longrightarrow \sf m =3 \times 0.02700... \\\)

\( \qquad\longrightarrow \sf m =0.081020....\;g \\\)

\( \qquad\longrightarrow \sf \underline{m =\boxed{\sf{0.081\;g}}} \\\)

Answer:

Explanation:

mass -  15.8 g = 0.0158 kg

volume = 32.5 - 22.5 = 10.2 ml

density = mass / volume

= 0.0158 / 10.2

= 0.00154 kg/ml

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The correct option is (d) To express very large or very small number.

What is the Scientific Notation?

Scientific notation is a way to present numbers that are too large or too small to be easily written in decimal form. The three components of  scientific notation are coefficient, base and exponent. The proper format to write a scientific notation is a x 10^b, where a is a number or decimal number and b is the power of 10 to make scientific notation equivalent to original number. When a number between 1 and 10 is multiplied by a power of 10 then the number is expressed in scientific notation. For example,  10000000 can be written as 10⁷, which is the scientific notation and the exponent is positive here. Similarly, for the negative exponent 0.000001 can be can be represented as 10-⁷.                             Hence, the scientific notation is used to express very large or very small numbers.

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Answer:

Explanation:

Here, we want to give a definition

Delta H of a reaction is the change in ethalpy that occurs at the end of the reaction. It is the end result of heat changes that occur in a chemical reaction

It describes what occurs at the end of the reaction

For instance, it is negative for an exothermic reaction which indicates that heat is given off. It is positive for an endothermic reaction, meaning heat is absorbed

Mathematically:

Answer:

its sodium hydroxide

Explanation:

Answer:

Example of ionic bonds— Sodium chloride and calcium oxide. Example of covalent bond— Water, carbon

Explanation:

ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.

A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.

The Rf value for the blue component is approximately 0.333, and the Rf value for the red component is 0.2.

The Rf value, or the retention factor, is a ratio used in chromatography to quantify the migration distance of a component relative to the migration distance of the solvent front. It is calculated using the formula:

Rf = (distance moved by the component) / (distance moved by the solvent front)

Given the information provided:

Distance moved by the blue component = 5 cm

Distance moved by the red component = 3 cm

Distance moved by the solvent front = 15 cm

Now we can calculate the Rf values for the blue and red components:

Rf_blue = (distance moved by the blue component) / (distance moved by the solvent front)

        = 5 cm / 15 cm

        = 1/3

        ≈ 0.333

Rf_red = (distance moved by the red component) / (distance moved by the solvent front)

       = 3 cm / 15 cm

       = 1/5

       = 0.2

Therefore, the Rf value for the blue component is approximately 0.333, and the Rf value for the red component is 0.2.

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Answer: 2.88 moles

Explanation: M = no of moles / volume of solution

1. Convection currents are caused by Differences in water density.

2. Feeling heat from a campfire is an example of   heat transfer through convection.

3. Heat always flow from a warmer object to a cooler object.

4. The best description of convection is Heat transfer through movement in fluids.

Differential heating leads to convection currents. Warm, less dense, lighter material rises while cool, more dense, heavier material sinks. Convection currents are patterns of circulation that are produced by this movement in the Earth's mantle, oceans, and atmosphere.

The transfer of heat between two bodies by currents of moving gas or fluid is known as convective heat transfer. In free convection, air or water rises and is replaced by a cooler parcel of air or water as it moves away from the hot body.

Heat energy will always transfer from the warmer object to the cooler object under normal circumstances and in nature. Up until the two substances reach the same temperature, heat energy will transfer between them. The term "thermal equilibrium" describes this.

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Answer:

cytosol

Explanation:

hope it help sorry if it is wrong

A) Bromine in carbon tetrachloride would serve as the basis for a simple chemical test that would distinguish between pure 1-hexene and pure hexane.

The correct option is A

When bromine in carbon tetrachloride is added to 1-hexene, the reddish-brown color of the bromine solution disappears due to the addition reaction between 1-hexene and bromine, forming colorless dibromohexane.

However, when bromine in carbon tetrachloride is added to hexane, the solution retains its reddish-brown color because hexane cannot react with bromine.

B) Dilute aqueous potassium permanganate and C) 10% sodium hydroxide solution would not distinguish between 1-hexene and hexane as they cannot react with these compounds in a distinctive way.

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Answer: Option A.

does work that can depend on the path of motion.

Explanation:

A non-conservative force acting on a particle does work that can depend on the path of motion because a non conservative force is a type of force that can remove energy from a progressive system and this energy cannot be restored back and the forces are path dependent because it matters where the particle begin or end.

It is a type of force such as friction or air resistance. This type of force does work that only depend on the path of motion.

Answer: A model would be useful because the model makes the concepts easier to understand.

Explanation:

Models are helpful tools in science education that can be used to enhance explanations, spark discussion, make predictions, provide visual representations of abstract concepts, and create mental models.