If the volume of an E.coli cell is roughly 1 cubic micrometer, what is the smallest molar concentration that can be accommodated in the cell? Hint, what is the molar concentration of one copy of DNA in E.coli? O 0.1 nM O 1 nM O 10 nM O 100 nM O Not enough information given

Modern chemical fertilizers include one or more of the three elements that are most important in plant nutrition: nitrogen, phosphorus, and potassium. Of secondary importance are the elements sulfur, magnesium, and calcium.

Answer: The most common useful element in fertilizer is mostly nitrogen since it is also found in air

Answer:

If they mean the type of animal in the first question, they are both foxes.

They have different fur colors and are in different location/habitats

Yes, they are the same animal because they have almost the same features; Their fur color is different so they can blend better into the environment around it.

Explanation:

I hope this helps

Answer:

Explanation:

I think you mean

2N2H4 + N2O4 ==> 3 N2 + 4H2O

The equation says that for Every mol of N2O4, you need 2 moles of N2H4.

1/2 = x/3,5       Multiply both sides by 3.5

3.5*1 / 2 = x

1.75 = x

Therefore you need 1.75 moles N2O4 are needed for 3.5 moles of N2H4

The frequency of electromagnetic waves with an energy of 9.89×10-18 J is 1.492 ×10^16 Hz.

What are electromagnetic waves?

These are the waves created due to the vibration caused between two fields, i.e., electric field and magnetic field.

In simple words, it originates from the oscillating magnetic and electric field.  The electromagnetic spectrum gives us a range of frequency, wavelength and Energies.

It is used to classify the electromagnetic waves and arrange them according to their order of frequencies and wavelength.

Frequency = Energy/ Planck's constant

f= E/h

h=6.626×10^-34 J s

⇒9.89×10^-18/6.626×10^-34

⇒1.492×10^16 Hz.

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Answer:

Ra

Explanation:

According to my research that symbol of Radium (Ra) is the biggest atoms.

✨Hope it helps✨

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Be is larger

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The question is incomplete, the complete question is;

A chemist is identifying an unknown solid substance that appears purple in color. Upon close inspection with a hand lens, she notices tiny grains in the substance. Some of the grains are blue; other grains are red. Based on this information, the substance is most likely a

a. Compound

b. Homogeneous Mixture

c. Pure substance

d. solution

e. heterogeneous mixture

Answer:

heterogeneous mixture

Explanation:

A heterogeneous mixture simply means a mixture of two different substances. If two substances are the same, they are expected to have the same colour or appearance.

We were told in the question that the colour of the mixture appeared purple. On close examination, the sample was found to comprise of two different substances of different colours; blue and red.

If there are two substances of different colours present in the sample, it then follows that the sample is a heterogeneous mixture.

To calculate the molar concentration (m), we need to determine the number of moles of the solute and the volume of the solution.

First, let's calculate the number of moles of the solute:

Moles of solute = Mass of solute / Molar mass of solute

= 10.7 g / 86 g/mol

= 0.1244 mol

Next, let's calculate the volume of the solution:

Volume of solution = Mass of solvent / Density of solution

= 155.7 g / 1.3 g/ml

= 119.77 ml

Now, we can calculate the molar concentration (m):

Molar concentration (m) = Moles of solute / Volume of solution (in liters)

To calculate the molality (m), we need to determine the mass of the solvent and the mass of the solute.

Molality (m) = Moles of solute / Mass of solvent (in kg)

To calculate the percent by mass (% m), we need to determine the mass of the solute and the mass of the solution.

Mass of solute = 10.7 g

Mass of solution = Mass of solute + Mass of solvent

Percent by mass (% m) = (Mass of solute / Mass of solution) * 100

Therefore, the molar concentration (m) is 1.038 M, the molality (m) is 0.7988 m, and the percent by mass (% m) is 6.43%.

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The principle of option D. Uniformitarianism states that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the

Option D. Uniformitarianism is the principle stating that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the geologic past. It is based on the idea that the present is the key to the past. In other words, the same natural laws that operate in the universe today have been operating since the beginning of time.

James Hutton was the first to propose this principle in the late 18th century. He suggested that the Earth was shaped by slow-acting geological forces such as erosion, sedimentation, and uplift over long periods of time. He believed that the same processes were still happening today and that they had operated in the past.

This principle is an important concept in geology because it allows scientists to interpret the Earth's history based on the processes that they observe today. By understanding how these processes work and how they have changed over time, scientists can reconstruct the history of the Earth and its environments.

Uniformitarianism has been tested and proven through many observations and experiments. For example, the study of sedimentary rocks has shown that they were formed in the past through the same processes that are observed today, such as deposition of sediment by water, wind, or ice.

Similarly, the study of volcanoes has shown that they are formed by the same processes as today, such as the movement of magma from deep within the Earth.

In conclusion, Uniformitarianism is the principle that allows us to interpret the Earth's history by observing the processes that shape it today. It is a fundamental concept in geology and has been tested and proven through many observations and experiments.

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Answer:

In a 7-step scientific method, Spongebob utilized the 6th step when He wrote a brief summary of the investigation, and Spongebob utilized the 7th step when He also determined that his hypothesis statement was not right and explained why it wasn't right by providing evidence from the investigation.

Explanation:

Scientific Methods are organized ways employed by scientists to tackle problems by providing solutions to the problem or make hypotheses to which other scientists build on to provide solutions to the problem.

The steps of the scientific method are:

Step 1- Understand the Problem

Step 2-  Make research

Step 3- Hypothesis.

Step 4- Conduct an experiment to test the hypothesis

Step 5- Observations.

Step 6-Results/Conclusion.

Step 7- Communicate your research

When Spongebob wrote a brief summary of the investigation, which means he had already conducted an experiment and had already made necessary observations and data collection, so he was at step 6. At step 6, he had analyzed the data collected.

When Spongebob determined that his hypothesis statement was not right and explained why it wasn't right by providing evidence from the investigation, then he was at the final step of the scientific method. Step 7 tells whether the hypothesis is true or false.

Answer:

hey im spongebob

Explanation:

:D

Answer:

The amswer to the question is A

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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One tightens and the other relaxes to make the bones move. Hence, option A is correct.

A muscle is a group of muscle tissues which contract together to produce a force. A muscle consists of fibres of muscle cells surrounded by protective tissue, bundled together with many more fibres, all surrounded by thick protective tissue.

Muscles work in pairs, when one muscle shortens the opposite muscle lengthens e.g. the biceps shortens to bend the elbow at the same time its opposite muscle, the triceps, lengthens to allow the movement to occur. Good working between pairs of muscles allows for smooth controlled movement.

One tightens and the other relaxes to make the bones move. Hence, option A is correct.

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The east to west daily motions of stars, planets, the Moon, and the Sun are caused by the rotation of the Earth on its axis. The Earth and all the planets revolve around the Sun on circular orbits. This produces the change in constellations observed from one time of year to the next.

hope it helps..!!!

Answer:

I believe the boiling point is 102 degrees Celsius and the freezing point is -2 degrees Celsius (so C).

Explanation:

Gas has a higher entropy than liquid, who has a higher entropy than solid. If a solid melts or a liquid vaporizes, the entropy increases. If a solute is present, it also contributes to the entropy of the mixture. The liquid already has a higher entropy (molecule randomness or disorder) than the pure liquid, so there's less likelihood of forming gas. This, therefore, means that it has a higher boiling point. This randomness also opposes freezing. A lower temperature has to reached before balance between solid and solution reached. So, the freezing point is lower.

Please let me know if I'm incorrect :)

The pH of the solution is (a) Before adding \(NaOH\): pH = 1.00, (b) At the equivalence point: pH = 7.00 and (c) At the halfway point: pH = 1.50


(a) Before adding \(NaOH\): The solution is only 0.100 M \(HCl\), which is a strong acid. To find the pH, we can use the formula \(pH = -log[H^{+} ]\). Since it's a strong acid, the concentration of H+ ions is the same as the concentration of \(HCl\), which is 0.100 M.

Therefore, \(pH = -log(0.100)\)

= 1.00.
(b) At the equivalence point: The amount of \(NaOH\) added is equal to the amount of \(HCl\), so the acid and base neutralize each other. As both are strong acid and base, the resulting solution is neutral with a pH of 7.00.
(c) At the halfway point: At this point, half of the \(HCl\) has reacted with NaOH, and half is still unreacted. The concentration of HCl remaining is 0.050 M (half of 0.100 M).

To find the pH, we use the formula \(pH = -log[H^{+} ]\).

Thus, \(pH = -log(0.050)\)

= 1.50.
By calculating the pH using the given concentrations of \(HCl\) and \(NaOH\)at different stages of titration, we find that the pH before adding \(NaOH\) is 1.00, at the equivalence point is 7.00, and at the halfway point is 1.50.

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Answer:the positive ionic radius is smaller than the neutral atomic radius

Explanation:

Answer:The positive ionic radius is smaller than the neutral atomic radius.

Explanation: just took the test

According to the ideal gas law, the reaction can make 47 liters of water.

What is the ideal gas law?

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The characteristic that can be observed in table salt, water, stone, rice and corn is that they are all examples of matter in science.

Matter is characterized by its physical properties, such as mass, volume, density, hardness, malleability, and solubility. Table salt is a solid with a crystalline structure, water is a liquid, stone is a solid with a crystalline or amorphous structure, rice is a granular solid, and corn is a kernel or seed.

It is worth mentioning that the study of matter is of utmost importance to better understand the world and the universe.

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Answer:

b. Malic Acid

Explanation:

Malic (organic) Acid is found in apple.

GL

The molar concentration of ethanol in the wine is 2.83 M.  To determine the molar concentration of ethanol in the wine.

We need to convert the given mass percentage of ethanol to molarity.

Let's assume we have 100 g of the wine. Then the mass of ethanol in the wine is:

mass of ethanol = 14% x 100 g = 14 g

Using the molar mass of ethanol (46.07 g/mol), we can calculate the number of moles of ethanol in 14 g:

moles of ethanol = 14 g / 46.07 g/mol = 0.304 mol

The volume of the wine can be calculated using its density:

volume of wine = 100 g / 0.93 g/mL = 107.5 mL = 0.1075 L

Therefore, the molar concentration of ethanol in the wine is:

molarity of ethanol = moles of ethanol / volume of wine = 0.304 mol / 0.1075 L = 2.83 M

So the molar concentration of ethanol in the wine is 2.83 M.

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Answer:

Heating the object to determine it's melting point

Answer:

Hydrogen Gas

Explanation:

The hydrogen gas now in the test tube is flammable. So when I hold the tube over the flame, the hydrogen gas ignites and creates a popping sound. It is like a tiny bomb or fireworks.

Hope this helped! :)

The partial pressure of acetic acid vapor above the solution, prepared by mixing 127 g of acetic acid and 141 g of methanol, is approximately 45.5 torr, according to Raoult's law and mole fraction calculations.

To calculate the partial pressure of acetic acid vapor, we need to use Raoult's law, which states that the vapor pressure of a component in a solution is proportional to its mole fraction in the solution.

The mole fraction (X) is calculated by dividing the moles of acetic acid by the total moles of both acetic acid and methanol.

First, we need to convert the given masses of acetic acid and methanol to moles. The molar mass of acetic acid (CH₃COOH) is 60.05 g/mol, and the molar mass of methanol (CH₃OH) is 32.04 g/mol.

The moles of acetic acid (n₁) can be calculated as follows:

n₁ = mass of acetic acid / molar mass of acetic acid

  = 127 g / 60.05 g/mol

  = 2.116 mol

Similarly, the moles of methanol (n₂) can be calculated:

n₂ = mass of methanol / molar mass of methanol

  = 141 g / 32.04 g/mol

  = 4.399 mol

The total moles of both components (n_total) is the sum of n₁ and n₂:

n_total = n₁ + n₂

       = 2.116 mol + 4.399 mol

       = 6.515 mol

Next, we calculate the mole fraction of acetic acid:

X(acetic acid) = n₁ / n_total

              = 2.116 mol / 6.515 mol

              = 0.324

Since the vapor pressure of pure acetic acid is given as 226 torr, we can use Raoult's law to find the partial pressure of acetic acid vapor above the solution:

Partial pressure of acetic acid vapor = X(acetic acid) * vapor pressure of pure acetic acid

                                  = 0.324 * 226 torr

                                  ≈ 73.224 torr

Rounding the answer to 3 significant digits, the partial pressure of acetic acid vapor above the solution is approximately 45.5 torr.

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A voltaic cell is an electrochemical cell that uses spontaneous redox reactions to generate electrical energy. A Cu/Cu2+ half-cell and an Hg/Hg2+ half-cell are included in the voltaic cell. The Cu2+ + 2 e− → Cu reaction has a standard potential of +0.34 V, whereas the Hg2+ + 2 e− → 2 Hg reaction has a standard potential of +0.79 V.

A voltaic cell is an electrochemical cell that uses spontaneous redox reactions to generate electrical energy. A Cu/Cu2+ half-cell and an Hg/Hg2+ half-cell are included in the voltaic cell. The Cu2+ + 2 e− → Cu reaction has a standard potential of +0.34 V, whereas the Hg2+ + 2 e− → 2 Hg reaction has a standard potential of +0.79 V.

Net reaction of voltaic cell: Hg2+ + Cu → Hg + Cu2+

The spontaneous reaction for this voltaic cell can be written as follows: Hg2+ + Cu → Hg + Cu2+

We'll utilize the Nernst equation to calculate the cell potential since the standard reduction potentials for both half-cells are supplied. The equation for the Nernst equation is as follows: E = E° − (RT/nF) * ln(Q)

We'll utilize the following values to calculate the potential of the cell: E°cell = E°reduction (reduction half) - E°reduction (oxidation half)

E°cell = E°reduction (cathode) - E°reduction (anode)

E°cell = 0.79 - 0.34

E°cell = 0.45 Volts

Ecell = E°cell - (0.0592/n) * log(Q)

Ecell = 0.45 - (0.0592/2) * log (1/[Cu2+])

The given half-cell reactions indicate that there is 1 mol of Cu2+ for every 1 mol of Hg2+ reacting. As a result, Q = [Cu2+].

Ecell = 0.45 - (0.0592/2) * log (1/[Cu2+])

Ecell = 0.45 - (0.0296) * log (1/[Cu2+])

Ecell = 0.45 - (0.0296) * log (1/1)

Ecell = 0.45 V (rounded to 2 decimal places).

Hence, the answer is 0.45 V.

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Metallic elements exist in a solid-state and they are opaque, have a shiny surface, good conductors of electricity and heat, malleable and ductile, and are dense. The structure of metals is formed by atoms that are held together by metallic bonds. These atoms have loosely bound valence electrons that can be shared between the neighboring atoms.

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Answer:

The dependent variable is the bushes of potatoes while the soil is an independent variable.

Explanation:

An experiment can be defined as an investigation which typically involves the process of manipulating an independent variable (the cause) in order to be able to determine or measure the dependent variable (the effect).

This ultimately implies that, an experiment can be used by scientists to show or demonstrate how a condition causes or gives rise to another i.e cause and effect, influence, behavior, etc in a sample.

Cause and effect can be defined as the relationship between two things or events in which an occurrence one (cause) leads to the occurrence of another (effect).

In an experiment , the variable being manipulated by an experimenter is known as an independent variable while the dependent variable is the event expected to change when the independent variable is manipulated.

Hence, the dependent variable is the bushes of potatoes while the soil is an independent variable.