the pKa of EDA (doubly protonated) is ?

A proportional relationship means that the ratio of ingredients remains the same. Therefore, the sets of ingredients that are in a proportional relationship with the recipe are:

6 Tbsp oil, 1.5 Tbsp vinegar, 1 Tbsp honey (the ratio of oil:vinegar:honey is 2:0.5:0.33)

15 Tbsp oil, 4 Tbsp vinegar, 3 Tbsp honey (the ratio of oil:vinegar:honey is 12:3:2)

24 Tbsp oil, 6 Tbsp vinegar, 4 Tbsp honey (the ratio of oil:vinegar:honey is 12:3:2)

The other options are not in a proportional relationship with the recipe, as the ratio of ingredients does not remain the same.

The effects of exposure were more pronounced in fish that had been raised in a less stressful environment, suggesting that environmental conditions can influence the impact of exposure to antidepressants.

1. The class of drugs being investigated in this study is antidepressants. They enter our waterways through excretion by individuals taking the medication, and disposal of unused medication into toilets or sinks that are connected to wastewater treatment plants.

2. C-start is an evasive maneuver that young fish use when they perceive a predator. This is important for larval fish survival because it helps them to avoid being eaten by predators.

3. In this investigation, researchers are testing two hypotheses. The first is that exposure to low levels of antidepressants can affect larval fathead minnows' behavior, and the second is that the effects of exposure will be more pronounced in fish that have been raised in a less stressful environment.

4. The researchers found that exposure to antidepressants at levels found in waterways can have a significant impact on the behavior of larval fathead minnows. Specifically, they found that the fish exposed to antidepressants were less likely to respond to the presence of predators, which could increase their risk of being eaten.

They also found that the effects of exposure were more pronounced in fish that had been raised in a less stressful environment, suggesting that environmental conditions can influence the impact of exposure to antidepressants.

To learn more about antidepressants,

https://brainly.com/question/28209828

#SPJ4

Answer:

I believe it may be-

1. Series

2. Parallel

3. Parallel

4. Series

Explanation:

In a series circuit, electricity only has one path to follow while a parallel circuit has more than one path to follow.

The order of the four liquids in the test tube based on their densities, from top to bottom, is as follows: Oil, Water, Honey, and Mercury.

In a test tube, the liquids will arrange themselves in order of increasing density. The least dense liquid will float on top, while the denser liquids will sink below. The first liquid, oil, has the lowest density and will float on top. Next, water, with a higher density, will settle beneath the oil.

Following water, honey, which is denser than water, will sink further down. Lastly, mercury, being the densest of the four liquids, will settle at the bottom of the test tube. This arrangement is a result of the liquids' different densities, with the denser liquids displacing the less dense ones.

To learn more about densities, click here:

brainly.com/question/15164682

#SPJ11

The spin quantum number has values of +1212 or -1212.

The spin quantum number is a property of the electron itself.

The electron is a subatomic particle with an electric charge of one elementary charge less than positive. It is represented by the symbol for. Given that they have no known components or substructure and are a member of the first generation of lepton particles, electrons are typically regarded as elementary particles. Approximately 1/1836th of a proton's mass is that of an electron. An intrinsic half-integer value angular momentum (spin) with units of the decreased Planck constant, is one of the electron's quantum mechanical properties. The Pauli exclusion principle states that since electrons are fermions, they can never share the same quantum state. Electrons, like all elementary particles, have the ability to interact with other particles and behave like waves when they are diffracted, similar to how light does.

Learn more about electron here:

https://brainly.com/question/1255220

#SPJ4

Electrons have a negative electrical charge, whereas protons have a positive charge.

Subatomic particles like electrons and protons are essential in defining how atoms and molecules behave. Electrons are negatively charged particles that move in shells or energy levels around an atom's nucleus. The positive charge of protons and the negative charge of electrons are identical in magnitude but diametrically opposed in sign. Together with neutral neutrons, protons are positively charged particles that make up an atom's nucleus. An atom's proton count establishes the element it belongs to. Atoms' chemical activity, particularly their capacity to form chemical bonds and reactions, is greatly influenced by the charges of their protons and electrons.

learn more about Subatomic particles here:

https://brainly.com/question/29765133

#SPJ4

Answer:

The main features of plate tectonics are:

Convection currents beneath the plates move the crustal plates in different directions. The source of heat driving the convection currents is radioactivity deep in the Earths mantle.

The important features of earth's plates are seismicity,volcanicity  and tectonic activity along plate margins.

It is a generally accepted scientific theory which takes into consideration earth's crust to be made up of tectonic plates. These plates move slowly and are moving since 3.4 billion years ago.

The model is developed on the concept of continental drift .Earth's lithosphere is split up in to seven-eight major plates and many minor plates.The position where plates meet their relative motion determines the plate boundary.

Tectonic plates are made up of lithosphere of ocean and thicker continental lithosphere.These plates are able to move because lithosphere has high mechanical strength.Lateral density variations occurring in mantle cause convection.

Learn more about plate tectonics here:

https://brainly.com/question/16926233

#SPJ2

Answer:

22.4/3.8=5.89

Explanation:

The increase in pressure when a basketball is pumped up is caused by the change in the number of molecules (optionC).

When air is pumped into a basketball, the air molecules are forced into a smaller space, which increases the number of molecules in that space. This increase in the number of molecules leads to an increase in the pressure of the gas within the ball.To better understand why this is the case, we can use the ideal gas law, which describes the behavior of gases under various conditions. The ideal gas law is expressed as PV = nRT, where P is pressure, V is volume, n is the number of molecules, R is the gas constant, and T is temperature.
When air is pumped into a basketball, the volume of the ball remains the same (assuming the ball is rigid and does not expand), and the temperature of the air inside the ball does not change significantly. Therefore, according to the ideal gas law, the only way the pressure can increase is if the number of molecules (n) increases.
This increase in pressure is what makes the ball bouncy and allows it to be used for games and activities. It is important to note that overinflating a basketball can lead to a rupture or bursting of the ball due to the excessive pressure created by the increased number of molecules.

for such more questions on pressure

https://brainly.com/question/24719118

#SPJ8

Answer: 10 grams

Explanation: Original sample is 80 gram and every three days half of its composition decays so 80 down to 40 in the first 3 days, 20 in the next three days, and  10 in the last three days

Answer:

Leucippus and Democritus

Explanation:

Hope this helps~ :D

Thank you so much! :D

The result table indicate that A. The solute is a SOLID because it has a DECREASE in the amount dissolved as temperature decreases.

The solubility of a solid solute in a liquid solvent generally decreases as the temperature decreases. This is because the kinetic energy of the solute molecules decreases as the temperature decreases. As the kinetic energy of the solute molecules decreases, they are less likely to have enough energy to escape from the solution and enter the gas phase.

In the table, as the temperature decreases, the concentration of the solute in the solution decreases. This indicates that the solute is a solid and that the solubility of the solute decreases as the temperature decreases.

Find out more on solute here: https://brainly.com/question/25326161

#SPJ1

The linear regression equation for the relationship between temperature (x) and efficiency ratio (y) is y = a + bx, where y represents the efficiency ratio and x represents the tank temperature.

In order to analyze the relationship between temperature and efficiency ratio, we can use the method of linear regression. Linear regression helps us determine the equation of a straight line that best fits the given data points. This equation allows us to estimate the efficiency ratio for any given tank temperature.

By using the least squares method, we calculate the values of the regression coefficients a and b. The coefficient a represents the y-intercept of the line, while the coefficient b represents the slope of the line. These coefficients allow us to determine the equation of the line that represents the relationship between temperature and efficiency ratio.

Once we have the regression equation, we can calculate the correlation coefficient and coefficient of determination. The correlation coefficient, denoted by r, measures the strength and direction of the linear relationship between the two variables. It ranges between -1 and 1, where values close to -1 or 1 indicate a strong linear relationship. The coefficient of determination, denoted by \(r^2\), represents the proportion of the total variation in the efficiency ratio that can be explained by the variation in temperature.

By analyzing the scatter diagram, we can visually observe the trend between temperature and efficiency ratio. The linear regression equation and the correlation coefficient provide quantitative measures to further understand and interpret the relationship between these two parameters.

Learn more about Linear regression

brainly.com/question/32505018

#SPJ11

The volume of gas is 3,949.31 litre, occupied by 1.74 moles of SF6 (g) at 273 K and 1 atm.

The ideal gas law is also called as perfect gas law. It is the relation between the pressure P, volume V, and temperature T of a gas.  

Given:

Volume of gas = ?

Number of moles (n) = 1.74 moles

Temperature (T) = 273K

Pressure (P) = 1 atm

R (gas constant) = 8.314

By an ideal gas equation

PV = nRT

By putting above value in ideal gas equation, we get

1 × V = 1.74 × 8.314 × 273

V = 3,949.31 litre

Thus, The volume of gas, in L is 3,949.31 litre, occupied by 1.74 moles of SF6 (g) at 273 K and 1 atm.

To learn more about an ideal gas law, follow the link;

https://brainly.com/question/4147359

#SPJ1

a) The sphere emits thermal radiation at a rate of 139.75 Watts.

b) The sphere absorbs thermal radiation at a rate of 37.66 Watts.

c) The sphere's net rate of energy exchange is 102.09 Watts.

To calculate the rates of thermal radiation emission and absorption, we can use the Stefan-Boltzmann law, which states that the rate of thermal radiation emitted or absorbed by an object is proportional to its surface area, temperature, and the Stefan-Boltzmann constant.

a) The rate of thermal radiation emitted by the sphere can be calculated using the formula:

Emitting Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(temperature^4 - environment\ temperature^4\))

Plugging in the given values:

Emitting Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((32.2 + 273.15)^4 - (82.9 + 273.15)^4)\)

Emitting Rate ≈ 139.75 Watts

b) The rate of thermal radiation absorbed by the sphere can be calculated in a similar way but using the environment temperature as the object's temperature:

Absorbing Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(environment\ temperature^4 - temperature^4\))

Plugging in the given values:

Absorbing Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((82.9 + 273.15)^4 - (32.2 + 273.15)^4)\)

Absorbing Rate ≈ 37.66 Watts

c) The net rate of energy exchange is the difference between the emitting rate and the absorbing rate:

Net Rate = Emitting Rate - Absorbing Rate

Net Rate = 139.75 Watts - 37.66 Watts

Net Rate ≈ 102.09 Watts

Therefore, the sphere emits thermal radiation at a rate of 139.75 Watts, absorbs thermal radiation at a rate of 37.66 Watts, and has a net rate of energy exchange of 102.09 Watts.

Note: The units for all the rates are Watts.

Learn more about thermal radiation emission

brainly.com/question/28517392

#SPJ11

The compounds can be ranked from least positive to most positive character of the carbon atom as follows:

The carbon atom in each of these compounds will have increasing positive character as the molecule moves down the list. The least positive is carbon (C) and the most positive is CH3F.

The carbon atom is the sixth element in the periodic table and has an atomic number of 6. It has four electrons in its outer shell, which can form four covalent bonds. It has four protons in its nucleus, and the most common isotopes are carbon-12 and carbon-14. In nature, carbon can be found in four allotropic forms: diamond, graphite, fullerenes and nanotubes. Carbon is an important element in many organic molecules, including proteins, carbohydrates and lipids, and is essential for life.

Learn more about carbon atom:

https://brainly.com/question/6841018

#SPJ4

Explanation:

Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. In nature, crystals can form when liquid rock, called magma, cools.

Answer: Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. In nature, crystals can form when liquid rock, called magma, cools.

Explanation: Can i have BrainLiest

The most stable examples of unpaired electrons are established on the atoms and ions of lanthanides and actinides.

For finding the figure of unpaired electrons, then first have to find the atomic number of the element then write the arrangement in the ground state, then according to the oxidation state deduct the number of electrons from the outside shell. So, there are 4 unpaired electrons.

One of the most important atoms with unpaired electrons is iron. However, the individual magnetic moments do not interact magnetically, like diamagnetism.

So we can conclude that  Boron has three unpaired electrons but only one is unpaired. the first two are in the 2s orbital and the third is in a p orbital.

Learn more about unpaired electrons  here: https://brainly.com/question/14657932

#SPJ1

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

Learn more about mixture at: https://brainly.com/question/12160179

#SPJ1

A. Ammonia is the limiting reactant.

B. Theoretical yield of urea is 215.3 kg.

C. Percent yield for the reaction is 86.0%

D. The mass of the excess carbon dioxide left is approximately 54.1 kg.

a) To identify the limiting reactant, we should compare the amount of products formed from each reactant. The chemical equation for the formation of urea \((NH_2CONH_2)\) by combining ammonia \((NH_3)\) and carbon dioxide \((CO_2)\) is as follows:

\(2 NH_3 + CO_2 - > NH_2CONH_2 + H_2O\)

The stoichiometry of the balanced equation indicates that the ratio of ammonia to urea is 2:1.

We can find the number of moles for each reactant using the following masses:

Moles of ammonia = 122.0 kg / 17.03 g/mol = 7.17 mol

Moles of carbon dioxide = 211.4 kg / 44.01 g/mol = 4.80 mol

It takes 14.34 moles of ammonia to react completely with the available carbon dioxide because the ratio of ammonia to urea is 2:1. But the amount of ammonia we have is less than we need - only 7.17 mol. As a result, ammonia is the limiting reactant.

b. Based on the limiting reactant, it is possible to calculate the theoretical yield of urea. We can use the moles of ammonia, which is the limiting reactant, to calculate the moles of urea:

Moles of urea = 7.17 mol / 2 = 3.58 mol

We can determine the theoretical yield of urea using the molar mass of urea (60.06 g/mol) as a starting point:

Theoretical yield of urea = 3.58 mol * 60.06 g/mol = 215.3 kg

C. The actual yield (185.1 kg) is calculated by dividing it by the theoretical yield (215.3 kg), then multiplying the result by 100%.

Percent yield = (185.1 kg / 215.3 kg) * 100% = 86.0%

D. We can calculate the amount of non-limiting reactant that has not reacted yet to determine the excess reactant. Since ammonia is the limiting reactant, we must determine how much excess carbon dioxide there is:

Moles of excess carbon dioxide = Moles of carbon dioxide initially - Moles of carbon dioxide used

= 4.80 mol - (7.17 mol / 2) = 1.23 mol

We can determine the mass of excess carbon dioxide using the molar mass of carbon dioxide (44.01 g/mol):

Excess carbon dioxide = 1.23 mol * 44.01 g/mol = 54.1 kg

Therefore, the mass of the excess carbon dioxide left is approximately 54.1 kg.

Learn more about Limiting reactant, here:

https://brainly.com/question/10090573

#SPJ4

Three products of this reaction is useful in cooking for making cakes rise is sodium carbonate

Here given reaction is

sodium hydrogen carbonate → sodium carbonate + carbon dioxide + water

NaHCO₃ → Na₂CO₃ + CO₂ + H₂O

The baking powder decomposed during cooking and released carbon dioxide gas and this make the cake rise by putting bubbles of gas in it and baking powder is included in the recipe to make the cake light and fluffy and the baking powder makes the syrup and mixture puff up and turn into a honeycomb with lots of little bubbles in it and it happen because the baking powder break down to form carbon dioxide and carbon dioxide is a gas and it causes the bubble in the mixture

Know more about cooking

https://brainly.com/question/2924658

#SPJ1

Answer:

0.4 M

Explanation:

M=moles/Liters

Convert grams to moles (446/223.37=1.99668711)

Convert 5000 mL to liters (5000/1000)

Plug in the values and solve

M=2/5

M=0.4

Answer:

because it's way to confusing and something that gets harder

Δsys = -139 kJ (since ΔH° is given as -139 kJ)

Δsurr = -Δsys = 139 kJ (since the system releases -139 kJ, the surroundings gain +139 kJ)

Δuniv = Δsys + Δsurr = -139 kJ + 139 kJ = 0 kJ (since Δuniv accounts for the total change in the universe, which is the sum of the changes in the system and surroundings)

The given reaction is C(graphite) + 2Cl2(g) ⟶ CCl4(l), and the enthalpy change (ΔH°) for the reaction is -139 kJ. To calculate the change in entropy of the system (Δsys), we would need the standard entropy values of the reactants and products. However, these values are not provided, so we cannot calculate the exact value of Δsys.

The change in entropy of the surroundings (Δsurr) can be determined using the enthalpy change and the fact that Δsurr = -Δsys. Therefore, Δsurr = -(-139 kJ) = 139 kJ.

Finally, the change in the total entropy of the universe (Δuniv) is the sum of Δsys and Δsurr. In this case, since Δsys is not provided and Δsurr is 139 kJ, the overall change in the universe's entropy is Δuniv = -139 kJ + 139 kJ = 0 kJ.

The change in entropy of the system (Δsys) cannot be determined without the standard entropy values. However, the change in entropy of the surroundings (Δsurr) is 139 kJ, and the change in the total entropy of the universe (Δuniv) is 0 kJ.

To know more about entropy, visit :

brainly.com/question/24278877

#SPJ11

Answer:

it's false the correct answer will be There are more red blood cells than white blood cells in the blood

Ionic compounds are composed of positively charged ions (called cations) and negatively charged ions (called anions). The chemical formula of an ionic compound is written by combining the chemical symbol for the cation and the chemical symbol for the anion.

For example, the ionic compound formed by the cation sodium (Na+) and the anion chloride (Cl-), would be written as NaCl.

When writing the chemical formula for an ionic compound, the cation is written first followed by the anion. This is because the cation and anion are attracted to each other and they combine to form a neutral compound.

Naming ionic compounds follows specific rules:

In summary, to write the chemical formula of ionic compounds, one must know the ionic charges of the elements and to name them, one must know the element names and the suffix -ide, if the cation has variable charge use roman numeral to indicate its charge.

Learn more about Ionic Compounds here: https://brainly.com/question/29005103

#SPJ4

Based on the tabulated data, compound B represents B) a metallic compound. Hence, option B) a metallic compound is the correct answer.

Characteristics of metals are:

Because electrons are mobile in metallic solids , they are good conductors of heat and electricity. Metallic solids are also malleable and ductile due to the ability of the metal nuclei to move past each other without disrupting the bonding.

To know more about metals, refer

https://brainly.com/question/4701542

#SPJ13

Answer:an ionic compound

Explanation: