What role does DNA play in living organisms?

It will take approximately 72.9 years (to the nearest tenth of a year) for the trichloroethene  (TCE) concentration to degrade down to the MCL of 5 μg/L.

To calculate the time it will take for TCE to degrade down to the MCL (Maximum Contaminant Level) concentration of 5 μg/L, we can use the concept of "first-order decay" for the degradation process. The formula for first-order decay is:

C(t) = C0 * e^(-kt)

where:

C(t) = concentration at time t

C0 = initial concentration (120 kg/L)

e = base of the natural logarithm (approximately 2.71828)

k = first-order decay rate constant

t = time

The half-life (t1/2) of TCE is given as 24 months, which means that the concentration will decrease to half its initial value in 24 months. The half-life is related to the first-order decay rate constant (k) as follows:

t1/2 = ln(2) / k

Solving for k:

k = ln(2) / t1/2

k = ln(2) / 24 months

Now, we can calculate the time (t) it will take for the concentration to reach 5 μg/L (MCL):

5 μg/L = 120 kg/L * e^(-kt)

t = ln(5 μg/L / 120 kg/L) / -k

t = ln(5e-6 / 120) / - (ln(2) / 24)

t ≈ 72.9 years

To know more about trichloroethene  (TCE)

https://brainly.com/question/9961821

#SPJ11

Answer:

You can find the volume of an irregular object by immersing it in water in a beaker or other container with volume markings, and by seeing how much the level goes up. You can use this relation backwards too -- if you know what material an object is made of, you can look up its density in a book. hOPE THIS HELPS! =)

Answer:

d

Explanation:

Answer: B. Mass number minus atomic number

Explanation: The atomic # is equal to the # of protons. The mass number is the total mass of neutrons & protons. You subtract the protons (atomic number) from the mass of the atom, the formula would be as shown:

Mass - Protons = Neutrons

An example is shown below

Element: Tin

Name shown on periodic table: Sn

Atomic #: 50

Mass # 118.711

118.711 - 50 = 68.711    <--- answer

Mass^     ^Protons/ Atomic #

I hope this helps :)

Answer:

\(\% O=24.6\%\)

Explanation:

Hello!

In this case, since the by-mass percent of an element in a compound is computed by taking into account its atomic mass, the number of atoms in the molecules and the molar mass of the compound, we can write:

\(\% O=\frac{2*16.00}{130.18 } *100\%\\\\\% O=24.6\%\)

Best regards!

The number of moles of the hydrocarbon gas is 0.081. FRom this the molecular weight is calculated as 28 g/mol. The formula of hydrocarbon having this molecular weight is ethene, C₂H₄.

Ethene is an unsaturated hydrocarbon thus it have a double bond with the formula C₂H₄. It is written as CH₂=CH₂ .

It is given that the pressure of the system is 53.4 mmhg that is 0.69 atm and temperature of the system is 55.3 degree celsius that is 328.3 K and volume is 3.14 L.The universal gas constant is 0.082 L atm (K mol). Apply these values in ideal gas equation.

PV = nRT

n = PV/RT

  = (0.69 atm × 3.14 l) / (0.082 L atm (K mol) ) × 328.3 K

   = 0.08 mole.

The molecular weight of this gas is 2.28 /0.08 =28 g/mol.

Hence, a hydrocarbon gas with a mass of 28 g/mol is ethene C₂H₄ .

To find more about ethene, refer the link below:

https://brainly.com/question/2720922

#SPJ1

Answer:

373 K; 253 K

0°C ; -258°C

Explanation:

In order to change Temperatures to Absolute Value (Kelvin) you shoud do this sum:

T° in C  + 273 = T° in K

For question 1:

100°C + 273 = 373K

-20°C + 273 = 253K

For question 2:

T° K - 273 = T° C

273 K - 273 = 0°C

15 k + 273 = -258 °C

Answer:

-67.8

Explanation:

Answer:

Maritime air mass, vast body of air of oceanic origin; also, an air mass (q.v.) that has had a long trajectory over water and has been so modified that it has the characteristics of an air mass of oceanic origin

Water has a much higher specific heat, than air, because it takes more energy to heat water than it does to heat air.

This is a term which is referred to as the quantity of heat which is required to raise the temperature of one gram of a substance by one Celsius degree.

Water has a higher specific heat because it requires more energy to heat water than it does to heat air and an example is result of the specific heat  of the two variables from various studies by scientists in various parts of the world.

Water has a specific heat of 4.186 J/g degrees celsius, versus air, which has a specific heat of 1.005 J/g degrees celsius which is therefore the reason why water was chosen as the correct choice and the one which has a higher specific heat.

Read more about Specific heat here https://brainly.com/question/27991746

#SPJ1

Answer:

ALPHA

Explanation:

Answer:

because they have the same number of valence electrons in their outer shells

Explanation:

The atoms of all group 1 elements have similar chemical properties and reactions because they all have one electron in their outer shell.

The standard form of the function (m = mx + b) most quickly reveals the y-intercept as b represents the y-intercept.

The form that most quickly reveals the y-intercept of a function is the slope-intercept form, which is written as y = mx + b, where m represents the slope and b represents the y-intercept. In this form, the y-intercept is immediately visible as the constant term (b). To find the y-intercept, you simply need to look at the value of b in the equation. Other forms, like standard form (Ax + By = C) or point-slope form (y - y1 = m(x - x1)), require additional calculations to find the y-intercept.

To know more about y-intercept visit:

https://brainly.com/question/14180189

#SPJ11

Answer:

C) Chalk powder

Explanation:

that's why it's often used in gymnastics ~~sweaty hands yk

There are 23 atoms of Fe in a 55.845 gram. As a result, after dividing our mass of 239 grams by the iron formula mass of 55.84 grams per bole, formol equals after calculation.

Use the millimeters to mole formula to calculate the molecular weight n, of a substance with a given mass, m, (in grams) accurately. n = m / M, where M is the substance's molar mass also known as gram-molecular weight. a substance's molecular weight expressed as a mass in grams. Example: NaCl salt weighs 58.44 grams per gram-mole. American Meteorological Society, copyright 2022.

Number of Avogadro = 6.023 × 10²³. The products of every chemical reaction are measured using the Avogadro number. 1 mole of atoms, molecules, or particles is equal to 6.023 x 1023. Calculating the number of molecules is as follows: mole number = quantity of material / mass of one mole.

To know more about mass visit :

https://brainly.com/question/26789700

#SPJ4

There are 23 atoms of Fe in a 55.845 gram. As a result, after dividing our mass of 239 grams by the iron formula mass of 55.84 grams per bole, formol equals after calculation.

Use the millimeters to mole formula to calculate the molecular weight n, of a substance with a given mass, m, (in grams) accurately. n = m / M, where M is the substance's molar mass also known as gram-molecular weight. a substance's molecular weight expressed as a mass in grams. Example: NaCl salt weighs 58.44 grams per gram-mole. American Meteorological Society, copyright 2022.

Number of Avogadro = 6.023 × 10²³. The products of every chemical reaction are measured using the Avogadro number. 1 mole of atoms, molecules, or particles is equal to 6.023 x 1023. Calculating the number of molecules is as follows: mole number = quantity of material / mass of one mole.

To know more about mass visit :

brainly.com/question/26789700

#SPJ1

Hey there !

Mass = 237 g

Volume 237 mL

Therefore:

Density = mass / Volume

D = 237 / 237

D = 1.0 g/mL

Hope this helps!

Explanation:

Ionic compounds are compounds formed by the bonding of a metal with  a non metal.

A. NO2

This is not an ionic compound because N and O are non metals.

B. CaCl2

This is an ionic compound because Ca is a metal and Cl is a non metal.

C. KI

This is an ionic compound because K is a metal and I is a non metal.

D. CO2

This is not an ionic compound because C and O are non metals.

E. H2O

This is not an ionic compound because H and O are non metals.

F. NaCl

This is an ionic compound because Na is a metal and Cl is a non metal.

Any specie that has d^0 or d^10 is unlikely to have color in coordination compounds.

A coordination compound has color if there are incompletely filled d orbitals present in the central metal atom/ion in the compound. The colors are believed to arise from weak d - d transitions that result in spectral bands in the visible region of the spectrum.

Though the options in the question were not shown, any specie that has d^0 or d^10 is unlikely to have color in coordination compounds.

Learn more: https://brainly.com/question/967776

After the death of the Buddha, Buddhism became a formal religion through the efforts of his followers, who continued to spread his teachings and organized into communities known as sanghas. Over time, these sanghas developed a system of governance, with monastic councils, hierarchical structures, and formalized practices and rituals.

One key factor in the formalization of Buddhism was the development of the Tripitaka, a collection of the Buddha's teachings, which were written down in the Pali language and preserved by monastic communities. The Tripitaka contains three major sections: the Vinaya Pitaka, which outlines the rules and guidelines for monastic life; the Sutta Pitaka, which contains the Buddha's discourses on a wide range of topics; and the Abhidhamma Pitaka, which provides a detailed analysis of Buddhist psychology and philosophy.
The spread of Buddhism was also facilitated by the patronage of rulers such as Asoka, who supported the religion and helped to spread it throughout his empire. However, this support was not always consistent, and Buddhism faced periods of persecution and decline in various parts of the world. Despite these challenges, Buddhism has continued to evolve and adapt over the centuries, with different schools and traditions emerging in different regions. Today, Buddhism is practiced by millions of people around the world, and continues to offer a unique and powerful perspective on the nature of reality, the human condition, and the path to liberation.

for such more questions on system

https://brainly.com/question/23117865

#SPJ8

The statement "Reaction of heating potassium permanganate produces potassium manganate" is false.

The reaction of heating potassium permanganate (KMnO₄) does not produce potassium manganate (K₂MnO₄). Instead, it undergoes a thermal decomposition reaction, resulting in the formation of different products.

When heated, potassium permanganate decomposes into potassium manganate (K₂MnO₄), manganese dioxide (MnO₂), and oxygen gas (O₂).

The reaction can be represented as follows:

2 KMnO₄(s) → K₂MnO₄(s) + MnO₂(s) + O₂(g)

Therefore, heating potassium permanganate leads to the formation of potassium manganate, along with manganese dioxide and oxygen gas. The color change from purple to green observed during the reaction is due to the formation of potassium manganate.

However, it is important to note that potassium manganate is not the sole product of the reaction but one of the products alongside manganese dioxide and oxygen gas.

To know more about the reaction of heating refer here :

https://brainly.com/question/30464598#

#SPJ11

Complete question :

Reaction of heating potassium permanganate produces potassium manganate. T/F

Answer:

Cobalt? LOL

Explanation:

Explanation

To find the molar mass of sulfur dihydride, you will need to find the sum of all the atomic masses making up sulfur dihydride.

sulfur dihydride is H2S.

Atomic mass of H = 1,00784 u

Atomic mass of S = 32,065 u

Molar mass = (1.00784 x 2) + 32,065 = 34.081 g/mol

Answer

34.081 g/mol

Doubling the atmospheric CO₂ concentration then C₃ plants has faster growth rate

CO₂ level are usually measured in percent of air or part per million and because of CO₂ the plants can maintain high photosynthetic rates with relatively low stomatal conductance and it has been suggested that increase CO₂ will increase water use efficiency of C₃ species because it caused a reduction in transpiration rate and an increases in CO₂ assimilation rate of the plant and C₃ would have faster growth rate and C₄ would be minimally affected

Know more about C₃ plants

https://brainly.com/question/13321231

#SPJ4

Answer:

The hypothesis is that you are going to have lots of energy due to \you having the energy drink! so it would be "A" for the first question. For the 2nd question i would have to guess "B"! :)  Number 3 wouldn't be "C" because it is a specified the theory, so it might be "A"! Number 4 would be "B" cause you do controlled experiments to prove your hypothesis to make a theory! Hypothesis are built off certain beliefs our guesses you think would happen so I believe it would be "D". Hopefully this helped and have a wonderful day!!

The compounds arranged from highest to lowest standard molar entropy are: CH₃OH(g) > O₂(g) ≈ N₂(g).

To arrange the compounds from highest to lowest standard molar entropy (S°) we can make use of the following principles:

Gaseous state has higher entropy compared to liquid or solid states.

More complex molecules tend to have higher entropy.

Larger molecules tend to have higher entropy.

O₂(g) - Oxygen gas consists of diatomic molecules and is in the gaseous state. It has a relatively simple structure and is a small molecule. Based on the principles mentioned, O₂(g) is expected to have moderate entropy.

N₂(g) - Nitrogen gas also consists of diatomic molecules and is in the gaseous state. It has a similar structure and size as O₂(g). Therefore, N₂(g) is expected to have a similar entropy to O₂(g).

CH₃OH(g) - Methanol gas is a larger and more complex molecule compared to O₂(g) and N₂(g). It contains carbon, hydrogen, and oxygen atoms, which adds complexity to its structure. Additionally, it is in the gaseous state. Therefore, CH₃OH(g) is expected to have the highest entropy among the given compounds.

Based on this analysis, we can arrange the compounds from highest to lowest standard molar entropy (S°) as follows:

CH₃OH(g) > O₂(g) ≈ N₂(g)

Learn more about entropy here:

https://brainly.com/question/31066828

#SPJ4

Answer: a) copy tissue

Explanation:

Tissue and cells in general get damaged, or just break down from wear and tear. So the cells divide to make up for this shortcoming, effectively replacing any broken parts with fresh new ones.

Answer:

Mass and Velocity

Explanation:

hope this is the right answer might wrong tho

Answer:

its velocity and mass

Explanation:

I got it right on edg

If we had used 4 grams of NaOH instead of 2 grams, the heat gained by the solution would have been higher.

The term enthalpy has to do with the heat that could be emitted or evolved in a given reaction. We know that in a neutralization reaction, there is an evolution of heat and as such the reaction  vessel would feel warm at the end of the reaction.

Also, the enthalpy would depend on the amount of the limiting reactant. In this case, the limiting reactant would be the sodium hydroxide and as such the enthalpy would affected by a change in the amount of the sodium hydroxide.

Learn more about enthalpy:https://brainly.com/question/13996238

#SPJ1

The boiling point of the solution in number 12 would be 100.624 °C.

The boiling point of a solution depends on many factors, including the concentration of the solute and the nature of the solvent. The value you provided (Kb of water = 0.512 °C/m) is the molal boiling point elevation constant, which is used to calculate the change in boiling point of a solvent when a solute is added. Using the molar boiling point to multiply the number ascribed to the degree Celsius of the solution which is 12 plus the boiling point of water. which is 100..

Therefore, the correct answer is as given above

learn more about boiling point: https://brainly.com/question/40140

#SPJ1