calculate the density of a cube that measures 72g and all sides of the cube measure 2cm

the concentration of ClCH2CH2Cl in the vessel 5.80 seconds later would be 1.49 M.

The second-order rate law for the given reaction is:

rate = k[ClCH2CH2Cl]

where k is the rate constant.

We can use the integrated rate law for a second-order reaction to solve for the concentration of ClCH2CH2Cl at a later time:

1/[ClCH2CH2Cl]t = 1/[ClCH2CH2Cl]0 + kt

where [ClCH2CH2Cl]t is the concentration of ClCH2CH2Cl at time t, [ClCH2CH2Cl]0 is the initial concentration, and k is the rate constant.

Plugging in the values given in the problem, we get:

1/[ClCH2CH2Cl]t = 1/1.22 + (0.743 M-1 s-1)(5.80 s)

1/[ClCH2CH2Cl]t = 0.8205

[ClCH2CH2Cl]t = 1.220 M / 0.8205

[ClCH2CH2Cl]t = 1.487 M

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Answer:

The air in the atmosphere consists of nitrogen, oxygen, which is the life-sustaining substance for animals and humans, carbon dioxide, water vapour and small amounts of other elements (argon, neon, etc.). Higher in the atmosphere air also contains ozone, helium and hydrogen.

Explanation:

Answer:

nitrogen, oxygen, carbon dioxide, water vapour, ozone, helium, and hydrogen.

Explanation:

Answer: I believe you are talking about the world's first recorded nuclear explosion that took place on the plains of the Jornada del Muerto Dessert.

Explanation: It is to be noted that the Trinity site is still considered to be radioactive, and Trinitite which is a green glass-like substance is found abundantly in the area. Trinity was an atmospheric test conducted by the U.S. Army on July 16th of 1945. The site was chosen because of its isolated, flat grounded, non-windy lands. This experiment was so tightly gatekept that not even the military policemen whom rode with it knew of its contents.

The higher the concentration of hydrogen ions A) the lower the pH. In a solution, the concentration of hydrogen ions (H+) determines its pH. The pH scale ranges from 0 to 14, with a pH of 7 being neutral.

A pH below 7 indicates an acidic solution, while a pH above 7 represents a basic or alkaline solution.
The relationship between pH and the concentration of hydrogen ions is inversely proportional, meaning that as the concentration of hydrogen ions increases, the pH value decreases. Consequently, a higher concentration of hydrogen ions results in a lower pH, making the solution more acidic.
It is important to note that the pH scale is logarithmic, meaning that each change of one unit in pH represents a tenfold change in the concentration of hydrogen ions. For example, a solution with a pH of 3 is ten times more acidic than a solution with a pH of 4 and a hundred times more acidic than a solution with a pH of 5.
Oxygen levels, on the other hand, are not directly related to the concentration of hydrogen ions or pH in this context. Therefore, options B and D are not accurate. Similarly, option C is not correct, as a higher concentration of hydrogen ions corresponds to a lower pH, not a higher one.

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Answer:.

pharmacies, prescribers, distributors/wholesalers, researchers, manufacturers, hospitals.

Explanation:

The Controlled Substance Act is a federal drug policy of the United States which regulates the manufacture, use, importation and possession and distribution of certain substances. It was enacted by the United States Congress in the year 1971.

Under the Controlled Substance Act, the dispensing of a controlled substance to the use includes pharmacies, prescribers, distributors/wholesalers, researchers, manufacturers, hospitals, etc.

Answer:

The last digit is estimated

Explanation:

the last digit of any measurement is estimated, and it is this estimated digit that reflects uncertainty. The more decimal places there are the less uncertainty there is.

The number of significant figures is uncertain in a number that ends with a zero to the left of the decimal point location. The zeros in the measurement 1,300 grams could be significant or they could simply indicate where the decimal point is located.

According to the concept of significant figures, the last digit is uncertain digit in a measurement.

Significant figures are used for establishment  of a number which is presented in the form of digits. These digits give a meaningful representation  to the numbers.

The significant figures are the significant digits which convey the meaning according to the accuracy. These provide precision to the numbers and hence are called as significant numbers.There are rules for counting significant figures which are as follows:

1)All non-zero digits are significant .

2)All zeroes which occur between non-zero digits are significant.

3)All zeroes to the left and right of  a non-zero digit are not significant.

4) All zeroes on right  of decimal are significant if a non-zero number follows them.

5)All zeroes on right side of non-zero digit are significant.

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Answer:

192

Explanation:

Bc its 182

When products of a reaction are continuously taken away from the sight of the reaction it is unable to present for the reverse reaction. Furthermore, reaction involving energy release will not go backwards unless energy is put into them.

Chemical processes that occur within living organisms are referred to as biochemical reactions. A living thing's metabolism is the culmination of all its biochemical processes.

Both catabolic (energy-releasing or exothermic) and anabolic (energy-absorbing or endothermic) events can occur during metabolism.

A biological catalyst termed an enzyme is required for the majority of biochemical reactions to increase their rate. The activation energy required to start the reaction is decreased by enzymes. The majority of proteins that make up enzymes are those that only interact with their substrate, a single kind of material.

Humans can inherit a wide variety of metabolic diseases. A single misplaced or faulty enzyme is the root of the majority of them.

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Answer

B. CH3COOH and NaCH3COO⁻

Explanation

By definition, a buffer is a solution of a weak acid and conjugate base or a weak base and conjugate acid used to resist pH change with added solute.

However, acidic buffers are solutions that have a pH below 7 and contain a weak acid and one of its salts.

Therefore, the combination that would act as an acidic buffer among the given options is:

B. CH3COOH and NaCH3COO

Answer:

(H2O) and (O2) ??

Explanation:

I hope it helps...

Although the exact number of products can vary, it is estimated to be around 200.

These individual products are grouped into broader item categories, which generally number around 800.

What is CPI?

The CPI, or Consumer Price Index, is a commonly used economic indicator that measures the average change over time in the prices paid by urban consumers for a basket of goods and services. It is designed to gauge inflation and price fluctuations in a country's economy.

The CPI calculates and tracks the price changes of various goods and services that are representative of the typical spending habits of urban households. These goods and services include food, housing, transportation, healthcare, education, and more. The index assigns weights to different categories based on their relative importance in household expenditures.

The basket of goods in the Consumer Price Index (CPI) typically comprises several hundred specific products, representing various categories of consumer spending. Although the exact number of products can vary, it is estimated to be around 200. These products are carefully chosen to provide a representative sample of items that consumers commonly purchase.

Furthermore, these individual products are grouped into broader item categories, which generally number around 800. These categories help organize the diverse range of goods and services included in the CPI basket and facilitate meaningful analysis of consumer price trends.

It is important to note that the specific number of products and categories in the CPI basket may differ between countries and the organizations responsible for calculating the index. It is advisable to consult the relevant statistical authority in your country for precise information regarding the number of products and categories used in their CPI calculation.

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An atom is a particle of matter that uniquely defines a chemical

element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.

The d-orbital starts in the third energy level (n = 3) of an atom.

Each energy level can contain one or more sublevels, including s, p, d, and f sublevels. The first energy level (n = 1) has one s orbital and can hold a maximum of 2 electrons. The second energy level (n = 2) has one s orbital and three p orbitals, allowing for a maximum of 8 electrons. The third energy level (n = 3) has one s orbital, three p orbitals, and five d orbitals, accommodating a maximum of 18 electrons.

The d-orbitals are found in the third energy level, corresponding to the third period of the periodic table. Therefore, the period number for the energy level where the d-orbital starts is 3.

The filling order of orbitals follows the pattern: 1s, 2s, 2p, 3s, 3p, 4s, 3d, and so on. The d-orbitals start filling after the p-orbitals in the third energy level. The electron configuration for the third energy level is written as 3s^2 3p^6 3d^1-10, depending on the element.

For example, the electron configuration of iron (Fe) is 1s^2 2s^2 2p^6 3s^2 3p^6 3d^6 4s^2. This configuration indicates that the d-orbitals of iron are half-filled with 5 electrons.

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The sequence in which the events are ranked in order to attain equilibrium is as follows.

Salt is first dissolved into its cations and anions by hydration of cations and anions.

In the second stage, hydrated anions and cations start to form a solid salt.

The rate of dissolution is equal to the rate of deposition in the last stage.

White dwarf star (WD) in a binary system is the initial state of the supernova. A companion star orbits the WD, and as it does so, it is accreting material onto it and creating an accretion disc.

Growing WD with accretion disc: The accretion disc expands as the partner star keeps dumping stuff onto the WD. The WD grows larger and more gigantic as a result of this.

WD at Chandrasekhar limit: When a WD hits its Chandrasekhar limit, it no longer has the ability to support any more mass without collapsing. When the WD has a mass that is around 1.4 times that of the Sun, this happens.

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Answer: C

Explanation: Based on the periodic table, O is atomic number 8, which means it has 8 electrons. The first few atomic orbitals are 1s, 2s, and 2p.Each orbital can hold 2 electrons maximum, and there are 2l+1 of each type of orbital (s,p,d,f,g,...), where l=0 corresponds to an s orbital, l=1 means porbital, and so on. So, the configuration for neutral O atom is: 1s22s22p4. When oxygen gains two electrons, it acquires a charge of 2−. Therefore, the twoelectrons, which go into the highest-energy atomic orbitals, give you a new configuration of1s22s22p6for O2−, which is the same electron configuration as Ne. That is known as a noble-gas-like configuration, and in general it is stable if oxygen is like that in a compound (having 8 electrons in its 2s and 2p orbitals combined).

Based on the information provided, his prediction is not correct because the concentration of sugar is the same inside and outside the cell, so the mass will stay the same.

(Option B) is correct.

Mass is referred to as dimensionless quantity which represents the amount of matter in a particle or object.

The artificial cells are placed in sugar solution in three different beakers where sugar solution concentration are different.

From the figure, we can deduce that the artificial cells have a sugar solution concentration of 25%.

In the beakers with 25% sugar solution, the prediction that it will have the greatest change in mass after 24 hours is incorrect.

The reason is because  sugar concentration is artificial cells and the solution is equal therefore, no net change in mass will occur as the solutes cannot cross the membrane.

Because of equal concentrations, the mass of the cell will not change, and their mass is balanced.

In conclusion, the beaker with 0% solution will have the greatest change.

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Complete question:

A student placed artificial cells, each containing a 25% sugar solution, into three different beakers containing sugar solution which varied in concentration from 0% to 25%. The setups are shown in the picture. The student collected data on the mass of each artificial cell. The student predicted that the cell in the beaker with 25% sugar solution would have the greatest change in mass after 24 hours. Would his prediction be correct? Support your answer. A) yes because it has the highest sugar concentration for both inside and outside the cell. B) no because the concentration of sugar is the same inside and outside the cell, so the mass will stay the same. C) yes because more sugar will move into the cell since it is small enough. D) no because the cell will shrink in the sugar solution.

70.6 litres of bromine trifluoride is required to produce 106 liters of fluorine gas according to the following reaction provided that all gases are at the same temperature and pressure.

Since, 2BrF3 (g) gives Br2 (g) + 3 F2 (g)

Here 2 mole BrF3 produces 3 mole F2

If volume produced of F2 is 106 litres

Therefore, volume of BrF3 =?

Since, v1 is directly proportional to n1

Therefore, v1/n1 = v2/n2

v1/2moles = 106 litres/3 moles

v1= 212/3 = 70.6 litres

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Answer:

the answer is A, they are measured in kilograms

: PM2.5 is defined as the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter.Question 15: False, carbon dioxide (CO2) is not considered a criteria air pollutant.

Question 16: The closest answer is 50%, but the exact percentage is not provided in the question.Question 17: The term "photochemical smog" is most synonymous with ozone (O3), which is a criteria air pollutant.Question 18: True, attainment of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards.

Question 14 asks about the definition of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 micrometers. It represents the mass concentration of particles suspended in the air, which are small enough to be inhaled into the respiratory system and can have adverse health effects.

Question 15 states whether carbon dioxide (CO2) is a criteria air pollutant. Criteria air pollutants are a set of pollutants regulated by environmental agencies due to their detrimental impact on air quality and human health. However, carbon dioxide is not considered a criteria air pollutant because it does not directly cause harm to human health or the environment in the same way as pollutants like ozone or particulate matter.

Question 16 asks about the percentage of carbon monoxide (CO) emissions from mobile sources in Santa Clara County. While the exact percentage is not provided in the question, the closest answer option is 50%. However, it is important to note that the precise percentage may vary depending on specific local conditions and emissions sources.

Question 17 inquires about the criteria air pollutant most synonymous with the term "photochemical smog." Photochemical smog is primarily associated with high levels of ground-level ozone (O3). Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight, creating a hazy and polluted atmospheric condition.

Question 18 addresses the concept of "attainment" of ambient air quality standards. To achieve attainment, measured concentrations of pollutants at all monitoring stations within an air district must be below the established ambient air quality standards. This ensures that the air quality in the given area meets the required standards for protecting human health and the environment.

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B) increasesAnswer:

Explanation:

As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution increases. Therefore, the correct option is option B.

The World System representing Units (SI) uses a mole (symbol mol) as the unit of material amount. How many fundamental entities of a particular substance are present in an object and sample is determined by the quantity of that material. An elementary entity can be a single atom, a molecule, a pair of ions, an ion pair, even a subatomic particle like a proton depending on the makeup of the substance.

For instance, although having differing volumes and masses, ten molecules of liquid (a chemical compound) because 10 moles of mercurial (a chemical element) both have the same quantity of substance, because the mercury has exactly one atom every every molecular structure of the water. As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution.

Therefore, the correct option is option B.

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Kinetic molecular theory states that gas particles are in constant, random motion and have negligible volume. This means that they will fill any container they are placed in, taking on both its shape and volume.

A scientific theory that explains how gases behave is called kinetic molecular theory. It claims that gases are composed of minuscule particles, referred to as molecules or atoms, that are constantly in motion and have a very small volume. Up until they hit with one another or the walls of their container, these particles move in a straight line. At that moment, they bounce off and start going in a different direction. In a nutshell, this is what kinetic energy is all about. Many different gas-related phenomena, such as pressure, temperature, volume, and diffusion, can be explained using kinetic molecular theory.

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Answer:

100x less acidic

Explanation:

pOH is the inverse of pH, which is a measure of the acidity or basicity of a solution. The lower the pH of a solution, the more acidic it is, and the higher the pOH, the less acidic it is.

To determine how many times more acidic a solution with a pOH of 12 is compared to a solution with a pOH of 10, we can use the formula:

pH1 / pH2 = 10^(pOH1 - pOH2)

In this case, we are given that the pOH of the first solution is 12 and the pOH of the second solution is 10. We can plug these values into the formula to calculate the ratio of acidity:

pH1 / pH2 = 10^(12 - 10)

= 10^2

= 100

Therefore, a solution with a pOH of 12 is 100 times less acidic than a solution with a pOH of 10.

Answer:

H and O

Explanation:

H and O because the difference in electronegativity is 1.4 which makes the bond polar.

The bonds that haver the greatest polarity is H and O. Option D

We know that a polar bond is the kind of bond that would exists between two compounds that have a high magnitude of difference in electronegativity. Now in this case, we can see that there are different magnitudes of electronegativities of the compound.

Let us recall that hydrogen is a member of group one and oxygen is a member of group six and then we can see that these compounds would not have the same polarity.

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The correct answer choice from above which are non-price determinants of demand is: future expectation of prices.

In order words, future expectation of prices of good and services cannot determine the present demand of such commodities as the price will be determined by what factor it will rise or fall to later

This future expectation price of commodities can be predicted based on information gathered about the old price, the experience dealing the price control of such goods and others factors involved in the cost of production

Economics can be defined as a social science which studies human behavior in relation with ends and scarce means which have alternative uses

So therefore, the correct answer choice from above which are non-price determinants of demand is future expectation of prices

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Answer:

dont know

Explanation:

Answer:

equal to - it's opposite but equal energy is the third law

Answer:

C

Explanation:

35-32 = 3