I am highly confused on the drawing from part A. I understand
that the COOH group is deprotonated first, then the R group, and
then the amine group, however I don't understand how I would know
which N
4. Ionization State of Histidine Each ionizable group of an amino acid can exist in one of two states, charged or neutral. The electric charge on the functional group is deteined by the relationship

Answer:

a pH above 7 is alkali

a pH lower than 7 is acidic

The pressure when the volume is 3.50 cm³ is 816 kPa

Pressure and volume of a gas have an inverse relationship at constant temperature

The relationship between the volume and pressure of a gas at constant temperature is given by the equation of Boyle's law:

P₁ = 476 kPa

V₁ = 6.00 cm³

V₂ = 3.50 cm³

P₂ = P₁V₁/V₂

P₂ = 476 * 6 /3.50

P₂ = 816 kPa

In conclusion, pressure and volume are inversely related at constant temperature.

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Answer: C

Explanation: Because I just did the test lol.

Chemicals are substances that can be natural or man-made. It can both hurt and help the environment as they pollute water and can also clean water. Thus, option C is correct.

Chemicals are compounds that are synthesized artificially and have various uses and applications in various fields. They can be both beneficial and detrimental to the environment and the ecosystem.

Chemicals like that from factories, pesticides run-off from agricultural fields, drugs, microorganisms, fertilizers, radioactive substances, etc, cause water pollution by acting as contaminants.

On the contrary, chemicals can be used to clean water pollution. Chloramine and chlorine are the most common chemical disinfectants that cleanse contaminated water to make it useful.

Therefore, option C. chemicals can both clean and pollute water.

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Moles of ammonia is 2.4 moles

Molarity of solution after dilution is 2.4 M

Given:

volume of ammonia solution = 0.40 l

molarity of solution = 6.00 m

To Find:

moles of ammonia

Solution:

1 molar (M) solution will contain 1.0 GMW of a substance dissolved in water to make 1 liter of final solution

M = n / V

M is the molality of the solution that is to be calculated

n is the number of moles of the solute

V is the volume of solution given in terms of litres

n = M x V

= 6 x 0.4

= 2.4 moles

So moles of ammonia are 2.4 moles

molarity of the resulting solution after dilution

M = n/V

= 2.4/1

= 2.4 M

So Molarity after dilution will be 2.4 M

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Answer:

Temperature is one of the major factors that affects the rate of change of the liquid colour, this is because ; like when if you freeze hot water the ice formed will be clear transparent, while on the other hand, if we freeze cold water it would be foggy inside the ice. This change occurs because of the temperature difference of the cold and hot water.

If my answer helped, kindly mark me as the brainliest!!

Thank You!!

Answer:

Salt and water is produced.

For example:-

NaOH(base)+HCl(Acid)=>NaCl(salt)+H20(water)

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Answer:

Answer:

The correct answer would be B.

Hope this helps :D

Answer:

2 are number of coloum o

Answer:

Relative volume of ether to water that should be used for the extraction = 1.205

Explanation:

The extraction/distribution coefficient of an arbitrary solvent to water for a given substance is expressed as the mass concentration of the substance in the arbitrary solvent (C₁) divided by the mass concentration of the substance in water (C₂).

K = (C₁/C₂)

Let the initial mass of the organic substance X in water be 1 g (it could be any mass basically, it is just to select a right basis, since we are basically working with percentages here).

If 94% of the organic substance X is extracted by ether in a single extraction, 0.94 g ends up in ether and 0.06 g of the organic substance X that remains in water.

Let the volume of ether required be x mL.

Let the volume of water required be y mL.

Relative volume of ether to water that should be used for the extraction = (x/y)

Mass concentration of the organic substance X in ether = (0.94/x)

Mass concentration of organic substance X in water = (0.06/y)

The distribution coefficient , Ko (Cether / C water), for an organic substance X at room temperature is 13.

13 = (0.94/x) ÷ (0.06/y)

13 = (0.94/x) × (y/0.06)

13 = (15.667y/x)

(x/y) = (15.667/13) = 1.205

Hope this Helps!!!

Answer:

Explanation:

So, to begin answering your question, Earth has a greater gravitational pull than the moon simply because the Earth is more massive. The moon's gravitational pull also affects Earth, though; the rising and falling of the tides are an effect of the moon's gravity.      HOPE THIS HELPS ^^

A student should request a replacement liquid hazardous waste bottle for the lab when the current bottle is full or nearing its capacity, or if it is damaged or compromised in any way that could lead to leaks or spills. It is important to handle and dispose of hazardous waste properly to ensure the safety of both the individuals working in the lab and the environment.

When the liquid hazardous waste bottle is close to being full, it increases the risk of spills or overflows, which can be hazardous and pose a threat to health and safety. Therefore, it is important to request a replacement bottle to ensure that there is sufficient space to collect and store additional hazardous waste materials.

Additionally, if the current bottle is damaged or compromised, it can increase the likelihood of leaks or spills, which can lead to exposure to hazardous substances. In such cases, it is essential to request a replacement bottle promptly to prevent any accidents or environmental contamination.

By requesting a replacement liquid hazardous waste bottle when necessary, students can maintain a safe and compliant laboratory environment while ensuring the proper handling and disposal of hazardous waste materials.

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Answer:

5 x 10^6

Explanation:

Answer:

The freezing point of a substance is the temperature at which it changes from a liquid to a solid. When tin is added to a substance, it can lower the freezing point of the substance. This is known as a colligative property of matter, which refers to the ability of certain substances, such as solutes, to alter the physical properties of a solvent (such as the freezing point or boiling point) without changing the chemical composition of the solvent.

In the case of tin, when it is dissolved in a solvent, it can disrupt the interactions between the solvent molecules, making it more difficult for the solvent to form a solid. As a result, the freezing point of the solvent is lowered. This effect is more pronounced when the concentration of the solute is higher.

It's important to note that the freezing point depression caused by tin (or any other solute) is dependent on the concentration of the solute and the nature of the solvent. Different solvents will have different freezing points, and the freezing point depression caused by a given solute may vary depending on the solvent used.

Explanation:

Answer:

The answer is "\(1 \times 10^{-6}\ s\)"

Explanation:

\(v = velocity = 55.5 \ \frac{cm}{s} = 55.5 \times 10^{-2} \ \frac{m}{s}\\\\\lambda = wavelength = 555 \ nm = 555 \times 10^{-9}\ m\\\\\upsilon = frequency\\\\v = \lambda \upsilon \\\\\upsilon = \frac{v}{ \lambda}\\\\\)

\(\upsilon= 55.5 \times 10^{-2} \ \frac{m}{s} \div 555 \times 10^{-9}\ m\\\\\ \ \ \ \ = \frac{10^6}{s}\)

In 1 second, \(10^6\) cycles take place.

1 wavelength cycle included. Thus, \(10^6\) cycles include \(10^6\) wavelengths.

\(10^6\) wavelengths 1 second until point A \(10^6\)

1 wavelength is \(\frac{1}{10^6}\ sec = 10^{-6}\)seconds after A.

Answer:

true trust ong gotta be true fff

The wavelength of light with a frequency of 4.36 x 10^15 Hz is approximately 68.9 nanometers.

To calculate the wavelength of light in nanometers, we can use the formula:

wavelength = speed of light/frequency

The speed of light is approximately 3.00 x 10^8 meters per second. We need to convert the frequency of 4.36 x 10^15 Hz to Hz. Thus,

wavelength = (3.00 x 10^8 m/s) / (4.36 x 10^15 Hz)

Simplifying this expression, we get:

wavelength = 0.0689 x 10^-6 m = 68.9 x 10^-9 m

Finally, we convert meters to nanometers by multiplying by 10^9:

wavelength = 68.9 x 10^-9 m x 10^9 nm/m

wavelength = 68.9 nm

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17.4 grams is the mass of a piece of iron that releases 367.05 joules of heat as it cools from 82.08 degrees Celsius to 12.98 degrees Celsius.

Given:

Heat energy = 367.05 joules

Temperature = 12.98°C

The specific heat of iron = 0.450 J/gC

The formula to calculate the heat released by a substance is:

Q = mcΔT

where Q is the heat released, m is the mass of the substance, c is its specific heat, and ΔT is the change in temperature.

Substitute the values in the equation:

m = Q / (c × ΔT)

m = 367.05 J / (0.450 J/g°C × 69.1°C)

m ≈ 17.4 g

Therefore, the mass of the piece of iron is approximately 17.4 grams.

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ANSWER

The mass of water is 0.0536 kg

STEP-BY-STEP EXPLANATION;

Given information

The mass of KNO3 = 175g

The molarity of the solution = 32.25 M

The molality formula is given below as

The first step is to find the mole of the solute using the below formula

Recall, the molar mass of KNO3 is 101.1032 g/mol

The second step is to find the mass of water using the molality formula

Hence, the mass of water is 0.0536 kg

The correct ground state electron configuration for Sr (strontium) is:

d. [Kr]5s^24d^2.

In the electron configuration, [Kr] represents the noble gas krypton, which comes before strontium in the periodic table and accounts for the filled electron shells prior to strontium. The 5s^2 portion indicates that there are two electrons occupying the 5s orbital, which are the valence electrons of strontium.

Following the noble gas notation, we start with the electron configuration of krypton: [Kr] = 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6.

To complete the electron configuration for strontium, we add the remaining electrons. The 5s orbital is lower in energy than the 4d orbital, so the 5s electrons are added before the 4d electrons. Thus, we have [Kr]5s^2.

Finally, since strontium has an atomic number of 38, its full electron configuration is: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^2.

This electron configuration accurately represents the distribution of electrons within strontium in its ground state, indicating the specific orbitals and the number of electrons present in each.

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Strontium (Sr)'s precise ground state electron configuration is [Kr]5s2, which is represented by option b in the notation for electron configurations.

The distribution of electrons in the ground state electron configuration of strontium (Sr) depicts the atomic structure of that element.. The electron configuration for a ground state Sr atom is [Kr]5s2. In this configuration, 'Kr' represents a core of electrons identical to that in a krypton atom, and '5s2' indicates two electrons in the 5s subshell. This correct answer aligns with option b [kr]5s2. The core notation [Kr] helps simplify the representation of the electron configuration.

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The molarity of the 100 ml of diluted ASA prepared in step a-2 of the experiment is 0.0556 M.

To calculate the molarity of the 100 ml of diluted ASA prepared in step a-2 of the experiment, we first need to know the amount of ASA that was added to the solution. Let's assume that we added 1 gram of ASA to the 100 ml of water.

The molecular weight of ASA is 180 g/mol. This means that 1 mole of ASA weighs 180 grams. We can use this information to calculate the number of moles of ASA in the solution:

1 gram of asa = 1/180 moles of ASA
= 0.00556 moles of ASA

Now we can calculate the molarity of the solution by dividing the number of moles by the volume of the solution in liters:

Molarity = moles of solute/liters of solution

We have 100 ml of solution, which is equal to 0.1 liters.

Therefore,

Molarity = 0.00556 moles / 0.1 liters
= 0.0556 M

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Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

We know that the leaves are the parts of the plant that are involved in photosynthesis. Photosynthesis is the process by which green plants produce their own food in the presence of sunlight and chlorophyll. We know that the leave has an outer protective covering.

The tissue that plays this outer covering of a plant for is the  epidermis and its waxy cuticle. It prevents damage to the plant.

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

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Answer:

without fission reactions you wouldn't react, and we need to react

Explanation:

1. Some reactions will present an actual yield lower than the theoretical yield, and this can occur due to many situations, a couple of the reasons why that we can list is that some reactions don't have the reactants actually reacting to form the products, and another reason why is the loss of reactants in the process for many possible situations.

4. According to the solubility curve, if we have 30 grams of NH4Cl at 50°C, the reaction will be unsaturated

The element first discovered in the Sun's spectrum and then found on Earth 30 years later is helium. In 1868, French astronomer Pierre Janssen and English astronomer Sir Norman Lockyer observed a yellow spectral line in the Sun's light during a solar eclipse.

This line did not correspond to any known element at that time. Lockyer and British chemist Edward Frankland suggested that the line was due to a new element, which they named "helium," after the Greek word for the Sun, "Helios." It was not until 1895, nearly 30 years after its initial discovery in the Sun's spectrum, that helium was found on Earth.

Scottish chemist Sir William Ramsay isolated helium by treating the mineral cleveite with acid. Ramsay's discovery confirmed the existence of helium as an element both in the Sun and on Earth. Helium is the second most abundant element in the universe and has various applications, including as a coolant in medical and scientific equipment, and in lighter-than-air balloons.

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Both solid and liquid wastes need to be transported in different ways because they both have different properties and characteristics.

solid and liquid wastes need to be disposed of in different ways as the liquid wastes are in a liquid nature and have to be transported into closed containers where as the solid are of solid nature and they require open trucks to transport them. It is important to do solid waste management so that there can be hygiene around the environment and fresh air is available.

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Answer:

low melting point, high density, and acid resistance

Explanation:

The region surrounding the nucleus where electrons are found is called the  electron Cloud

The electron cloud of an atom refers to the region around the nucleus where electrons are most likely to be found. Electrons are negatively charged particles that occupy specific energy levels or orbitals around the nucleus. These energy levels or orbitals are also referred to as electron shells.

The electron cloud is not a well-defined boundary or structure, but rather a probability distribution that indicates the likelihood of finding an electron at a particular location relative to the nucleus. The shape and size of the electron cloud are determined by the energy level and sublevel of the electrons in the atom.

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