In order to extract isobutyric acid from a solution of diethyl ether, one should wash the solution with what?

Answer:

a b, c

Explanation:

starch is a polymer-polymeric carbohydrate

cellulose is also one-straight chain polymer

polyvinylchloride -a synthetic plastic polymer

sun flower-used for folate medication

Answer:

Metallic character of the element

Explanation:

It is clear from the tabular data that, the monkeys in troop 2 were better to avoid predators and more of them  were able to reproduce. Hence, option D is correct.

In the biosphere, not all living things are fit to survive for a longer life time. Most of them are pray of other higher level animals. Some organisms adopt some strategies to hide from their predators and they can survive more.

It is clear from the table that, the monkeys residing in the ground are more prone to the attacks by their predators. Whereas monkeys living in trees can survive more.

In each year the survival rate is increasing for both troop. However the more number of monkeys which can sustain their population is in troop 2. Therefore, option D is correct.

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Answer:Water contains Oxygen the purified the methane gas

Explanation:

The given statement "A change in the concentration of the reactant or the product do not change keq" will be false. Because a change in the concentration of a reactant or product will change the value of Keq.

According to Le Chatelier's principle, when a stress is applied to a system at equilibrium, the system will respond in a way that partially counteracts the stress and reestablishes equilibrium. Changes in the concentration of a reactant or product will alter the concentrations of all species present in the reaction, and thus will disturb the equilibrium.

For example, if the concentration of a reactant is increased, the reaction will shift towards the product side to partially counteract the increase in the concentration of the reactant. This will result in an increase in the concentration of products and a decrease in the concentration of reactants. As a result, the value of Keq will change to reflect the new equilibrium concentrations of reactants and products.

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From the following \(H_3PO_4\) is a polyprotic acid. Polyprotic acids are acids that have more than one ionizable hydrogen atom.

When these acids dissolve in water, they can release multiple protons (H+) in a stepwise manner. In the options you provided: \(H_3PO_4\) (phosphoric acid) is a polyprotic acid because it has three ionizable hydrogen atoms. It can release one proton at a time, forming \(H_2PO4^-\), then \(H_2PO4^-\), and finally \(PO_4^{3-}\). \(H_2SO_3\) (sulfurous acid) is also a polyprotic acid with two ionizable hydrogen atoms. It can release one proton and then release another proton . On the other hand, \(CH_3COOH\) (acetic acid) and \(CH_4\) (methane) are not polyprotic acids. Acetic acid only has one ionizable hydrogen atom and can release one proton to form \(CH_3COO^-\). Methane, which is not an acid, does not have any ionizable hydrogen atoms.

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Answer:392 lambo

Explanation:

No, if the hydrogen atom's energy were proportional to n (or any power of n), it would become infinite as n increased in size. However, n2 has an inverse relationship with the atom's energy. As a result, as n increases to infinity, the atom's energy gets closer to the ionization energy, or 13.6 eV, which is a value that is a finite amount above the ground state. Its energy loss is never greater than the ionization energy as the electron transitions from one bound state to another. Any emitted photon has a limited amount of energy and frequency.

As n rises, energy magnitude decreases, but the electron's energy rises because of the negative sign.

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Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the radius of magnesium atom is 141×10⁻¹²m.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

In the given figure, the radius of magnesium is 5.5 times the radius of hydrogen.

radius of hydrogen is 25 ×10⁻¹²m

radius of magnesium is 5.5  × 25 ×10⁻¹²m

radius of magnesium is 141×10⁻¹²m.

Therefore, the radius of magnesium atom is 141×10⁻¹²m.

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Answer:

Black eyed susan

Explanation:

...

Answer:

The laboratory equipment is called beaker

Answer: 2Al+6HCl→2AlCl3+3H22Al+6HCl → 2AlCl3 + 3H2

Explanation:

Answer:

Buoyancy.

Explanation:

Buoyancy is a force created by the water that is displaced by an object. It is directly proportional to the amount of water that is being displaced by an object.

Hence, the greater the amount of water an object displaces; the greater is the force of buoyancy pushing the object up.

The buoyancy of an object is given by the formula;

\(Fb = pgV\\\\But, V = Ah\\\\Hence, Fb = pgAh\)

Where;

Fb = buoyant force of a liquid acting on an object.

g = acceleration due to gravity.

p = density of the liquid.

v = volume of the liquid displaced.

h = height of liquid (water) displaced by an object.

A = surface area of the floating object.

The unit of measurement for the buoyancy of an object is Newton (N).

Answer:

One reason for Jennelle's designs working better is because her aluminum foil sunlight reflector was larger. So. the size of the reflective surface does affect the temperature of the oven. For any given design, the larger the insolated area, the greater the power. Meaning a smaller cooker only collects a small amount of sunlight; no matter how good the design. 

That is one reason why the parabolic solar oven design works so well. Parabolic solar cookers use a parabolic-shaped reflector to direct sunlight to a small area in order to generate heat for cooking. They are able to reach temperatures as high as 400°F. 

Insulating the oven would help it retain heat. Insulation lets you collect more heat and light energy, which allows you to raise the temperature to even higher levels. So, insulation is anything that lets you "hold on to" that collected heat and lose less of it.

A tighter cover would heat the oven faster rather than a looser cover. The parabolic design doesn't have a cover, although the food itself is usually in a pot or container.  

Explanation:

In most designs, using a tighter cover and increasing the reflecting surface will both raise the temperature. Insulation will, however, typically lower the temperature.

It is frequently necessary to add, remove, or adjust elements while designing a product in order to increase its efficiency. The temperature and how to raise or lower it is among the aspects taken into account in items like ovens.

Some methods for raising the temperature include:

Insulation: Since insulation is primarily employed to disrupt the cycle of heat transfer, applying insulation typically entails lowering the product's internal temperature or concentrating the heat in a single location.

Thus, In most designs, using a tighter cover and increasing the reflecting surface will both raise the temperature.

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Answer:

The levels, from smallest to largest, are: molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.

Explanation:

The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.

Answer:

the matter

from largest to smallest.

- organism-organ-organelle-tissue-cell-atom-elements-molecule

Answer:

volume is the amount of space something occupies

Explanation:

Answer:The space an object takes up

Explanation:

Answer:

3.2 MJ or 3200KJ or 3200000J

Explanation:

To calculate the Kinetic energy, we use the following formula:

\( \alpha ke \: = \frac{1}{2} m {v}^{2} \)

Where, ∆KE = change in kinetic energy

m = mass

v = velocity

From our question, we have

m = 16000 kg

v = 20 m/s

Substitute the values into the equation gives,

\(ke \: = \: \frac{1}{2} \: \times \: 16000 \: \times \: {20}^{2} \\ = 3200000 \: joules\)

Therefore, the Kinetic energy of the car

∆KE = 3200000 J = 3200 KJ = 3.2 MJ

And we have the solution to our problem.

Answer:

Nickel(III) Sulfate Ni2(SO4)3 Molecular Weight -- EndMemo.

Explanation:

this will explain everything

Answer:

2.53•10^23 atoms

Explanation:

23 is the exponent btw

Answer:

The short general principle of solubility states that "like dissolves like." Solvents that have similar polarity or charge to the solute tend to dissolve it more readily.

Solubility is the ability of a substance to dissolve based on chemical nature, intermolecular forces, and "like dissolves like" principle. Factors like particle size, temperature, and pressure affect solubility. It is expressed as the maximum amount of solute that can dissolve in a solvent.

The standard enthalpy change for reaction (3) is 117.1 kJ.

The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.

To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.

First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):

C2H4(g)C2H6(g) ΔH° = -52.3 kJ

Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):

2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

Now, we add the two modified equations together:

C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):

C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ

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Answer:

3845

Explanation:

Answer:

it is 3845 grams

Explanation:

Answer:

Transition metals (Group C) have different numbers of valence electrons compared to the other groups mentioned. Therefore option C is correct.

Transition metals (Group 3-12) have varying numbers of valence electrons. This is because their valence electrons are located in more than one energy level or subshell.

The number of valence electrons for transition metals can range from 1 to 12, depending on the specific element within the group. The varying numbers of valence electrons in transition metals contribute to their diverse chemical properties and ability to form multiple oxidation states.

Therefore, transition metals (Group C) have different numbers of valence electrons compared to the other groups mentioned.

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The chart is showing the position -time graph of the movement of ball. The x-axis represents the time of travel and y-axis represents the position of the ball with respect to the time.

The position - time graph is plotting the position of a moving object in with respect to different time. From this plot we can easily understand the displacement by an object. Similarly we can determine the speed of the object from the slope of the line.

The position is expressed in meters and the time is expressed in seconds. If the plot shows a linear curve, then the object is moving with constant speed.

Here, the position of the moving ball is given in  y-axis  0, 2.5 m, 6, 8 and 10 meters with respect to the time given in x-axis as 0 ,4,8,12 and 16 seconds.

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The dependent variable in this type of experiment is referred to as the Plant growth and is therefore denoted as option D.

This refers to a type of  variable whose value will change depending on the value of another variable which is referred to as the independent variable. It is also referred to the variable which is usually tested or measured when an experiment is done by scientists.

In this case, we were told that the plant were exposed to different criteria such as the music types and the constants such as light and water and the effect on the plant growth will be measured after sometime.

Since the parameter to be measured is the plant growth then it is referred to as the most appropriate choice for dependent variable.

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Answer: True

Explanation:

The new volume of the gas is 2.38 L when the temperature is raised to 80°C and the pressure is increased to 245 kPa.

Given:

P1 = 110 kPa

V1 = 4.00 L

T1 = 30°C = 30 + 273.15 K = 303.15 K

P2 = 245 kPa

T2 = 80°C = 80 + 273.15 K = 353.15 K

Use the combined gas lawc, which states:

(P1V1) / (T1) = (P2V2) / (T2)

Where:

P1 and P2 are the initial and final pressures, respectively.

V1 and V2 are the initial and final volumes, respectively.

T1 and T2 are the initial and final temperatures, respectively.

Substitute these values into the equation:

(110 kPa × 4.00 L) / (303.15 K) = (245 kPa × V2) / (353.15 K)

Now, let's solve for V2:

(110 kPa × 4.00 L × 353.15 K) = (245 kPa × V2 × 303.15 K)

(176860 kPaLK) = (74235 kPa × V2 × K)

Dividing both sides by 74235 kPa × K:

(176860 kPaLK) / (74235 kPa × K) = V2

V2 = 2.38 L

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