3. Except for the bolt, note the difference between the calculated volumes and the volume
found by the displacement method. Which method is more accurate? Why?

Answer:

i think you mean what is the kingdom of plants, but its "Kingdom Plantae".

Kingdom Plantae traits: eukaryotic/have nucleus, multicellular and autotrophic. (they photosynthesis)

2nd largest kingdom

Answer:

Introduction: All the plants are placed in the Kingdom- Plantae, according to the five-kingdom classification by R.H. Whittaker. The Kingdom- Plantae consists of multicellular plants with eukaryotic organization and chlorophyllous cells.

Explanation:

What is the kingdom for plants called?

What are the 3 plant kingdoms?

Kingdom Plantae Organisms

Ferns: They fall under the division Pteridophyta and are known to have vascular tissue. ...

Mosses: They fall under the division Bryophyta and have no vascular system. ...

Cone-bearing plants: They fall under the division Spermatophyta, sub-division gymnosperms

A, B, and C take the least amount of energy to disassemble from least to greatest amount.

There are lots of molecules in matter. Most of the oceans and atmosphere are also made up of them. The majority of organic compounds are molecules. Molecules such as proteins, the amino acids that make them up, nucleic acids (DNA and RNA), sugars, carbohydrates, lipids, and vitamins are examples of the constituents of life.

The following are listed in order of how much energy each one needs to break the carbon-carbon bond:

A. C2H2: C = H

B. C₂H4: H

H/

C=C

C. C₂H6: H H

H

H-C-C-H

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Answer: The answer is glucose which has the formula C6H12O6. With carbon present in glucose, it is termed an "organic" compound. None of the other examples have any carbon in them.

Explanation:

Answer:

Start with your basic equation for pH

pH = - log [H+]

then rearrange the equation to solve for [H+]

just like to get move something multiplied from the one side to the other you divide both sides by that number ( a*b = c …. a*b/b = c/b …. a = b/c), you do the ‘inverse’ of a log function, which is 10^

first bring the - over

-pH = log [H+]

then remove the log by taking 10^ on both sides

10^(-pH) = 10^(log [H+])

10^(-pH) = [H+]

and there is your relationship.

Explanation:

one in four  are the odds of acquiring an sexually transmitted infections

during a lifetime.

Sexually transmitted infections (STI) are described as the  infections or conditions that you can get from any kind of sexual activity involving your mouth, an_us, vagi_na or pe_nis.

The chances of getting an Sexually transmitted infections  from one unprotected encounter with a partner who is infected with syphilis, gonorrhea, or chlamydia are about 30 percent.

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Answer:  d. Cyolite

Explanation:

a.bauxite   - Aluminum ore ✅

b.haematite - Iron ore  ✅

c.calamine - an ore of zinc  ✅

d.cyolite​ -   ❌  the ore is cryolite

✅ - is an ore

❌ - not an ore

Answer:

It is Noble-gas notation

Explanation:

Just did it on Edgenuity 2020

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the given electronic configuration represents noble-gas notation​.

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.

The systematic distribution of electrons in the various atomic orbitals is called its electronic configuration. The atomic number of argon is 18. The electronic configuration of argon is (Ne) 3s² 3p⁶. 1,2,3 represents the number of shells and s and represents the orbitals. The superscripts represents the number of electrons in each orbitals. The given electronic configuration represents  noble-gas notation​.

Therefore, the given electronic configuration represents noble-gas notation​.

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An exergonic reaction is a spontaneous reaction in which the standard change in free energy is negative.

Exergonic reactions are spontaneous and release energy. When a chemical reaction is exergonic, it releases energy, and its reactants have more energy than its products. This type of reaction releases energy during a reaction, resulting in a net decrease in the Gibbs free energy of the system.

The energy diagram for the exergonic reaction is as follows:It can be seen from the above figure that the reaction proceeds spontaneously from the higher energy state to the lower energy state. The difference between the initial and final states is the energy that is released by the system.Exergonic reaction releases energy and it is a spontaneous process.

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Answer:

B.

Explanation:

The atomic model represents the position of the sub-atomic particles. Model A was proposed after Rutherford's scattering experiment where the positive particles were deflected in the middle. Thus, option A is correct.

Rutherford's atomic model proposed the presence of the positive nucleus in the middle of the atom while the electrons surrounded them in their orbitals with a negative charge.

He performed the scattering experiment where alpha particles emitted by the radioactive element were used to locate the positions of the electrons, neutrons, and protons.

According to the experiment, model A, best fits as the nucleus made of protons and neutrons takes the center of the atom with negative electrons surrounding them. The nucleus is small as compared to the entire atom.

Therefore, option A. model A best proposes Rutherford's model.

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Statement 1: The Robinson annulation reaction is a method for the construction of cyclohexenones.

This statement is correct. The Robinson annulation reaction is a well-known organic reaction that allows the synthesis of cyclohexenones. It involves the formation of a cyclic enolate intermediate, followed by intramolecular aldol condensation to form the desired cyclohexenone ring system.

Statement 2: The Robinson annulation reaction proceeds through a conjugate addition reaction.

This statement is incorrect. The Robinson annulation reaction does not proceed through a conjugate addition reaction. Instead, it involves a series of steps including a nucleophilic addition, formation of a cyclic enolate, and intramolecular aldol condensation.

Statement 3: The Robinson annulation reaction requires an α,β-unsaturated ketone and a carbonyl compound as starting materials.

This statement is correct. The Robinson annulation reaction typically requires an α,β-unsaturated ketone (such as a Michael acceptor) and a carbonyl compound (such as an aldehyde or ketone) as starting materials. These reactants undergo a series of transformations to form the cyclohexenone product.

Statement 4: The Robinson annulation reaction is named after the chemist Robert Robinson.

This statement is correct. The Robinson annulation reaction is indeed named after the British chemist Sir Robert Robinson, who developed this synthetic method in the early 20th century. His pioneering work in the field of organic synthesis contributed significantly to the understanding and advancement of this reaction.

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Matthew takes a little longer to hear the train whistle on a cold winter day than he does on a warm summer day.

Temperature has an effect on sound speed, with higher temperatures resulting in faster sound speed. The speed of sound is approximately 347 m/s at 38° C, and 331 m/s at -4° C.

To calculate the time it takes for Matthew to hear a train whistle, use the formula:

time = distance / speed

On a warm summer day at 38° C:

time = 900 m / 347 m/s = 2.59 s

On a cold day at -4° C:

time = 900 m / 331 m/s = 2.72 s

Therefore, hearing the train whistle on a cold winter day takes significantly longer than on a warm summer day.

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This problem is providing the equilibrium reaction whereby SO3 is produced and asks for the value of the equilibrium constant. After the calculations, the answer turns out to be 0.124.

In chemistry, when a chemical reaction attempts to go to completion, it might experience a limitation known as equilibrium; a condition where it is not able to proceed any further.

In such a way, for the given reaction:

\(2SO_2(g)+O_2(g)\rightleftharpoons 2SO_3(g)\)

We can write the equilibrium expression as:

\(K=\frac{p_{SO_3}^2}{p_{SO_2}^2p_{O_2}}\)

Hence, given the total pressure at equilibrium, we can add the pressures of all the species at equilibrium including the reaction extent, x:

\(P_{eq}=p_{SO_3}+p_{SO_2}+p_{O_2}\\\\3.80=(2x)+(2.98-2x)+(1.18-x)\)

Thus, we solve for x to obtain:

\(3.80-2.98-1.18=2x-2x-x\\\\-0.36=-x\\\\x=0.36bar\)

Hence, we plug it in into the equilibrium expression to obtain the equilibrium constant as follows:

\(K=\frac{(2x)^2}{(2.98-2x)^2(1.18-x)}\\\\K=\frac{(2*0.36)^2}{(2.98-2*0.36)^2(1.18-0.36)}\\\\K=0.124\)

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There are 0.1141 moles of perchlorate ions in 85.8 mL of 1.33 M magnesium perchlorate.

To find the number of moles of perchlorate ions in 85.8 ml of 1.33 M magnesium perchlorate, we need to use the formula:

Moles = Molarity x Volume

Moles of magnesium perchlorate = 1.33 M x 85.8 ml = 114.114 moles

Since each molecule of magnesium perchlorate contains one perchlorate ion, the number of moles of perchlorate ions is the same as the number of moles of magnesium perchlorate. Therefore, the number of moles of perchlorate ions in 85.8 ml of 1.33 M magnesium perchlorate is 114.114 moles.

However, we need to convert the volume from ml to L in order to get the correct answer. There are 1000 ml in 1 L, so we can convert 85.8 ml to 0.0858 L:

Moles of magnesium perchlorate = 1.33 M x 0.0858 L = 0.1141 moles

Again, the number of moles of perchlorate ions is the same as the number of moles of magnesium perchlorate, so the number of moles of perchlorate ions in 85.8 ml of 1.33 M magnesium perchlorate is 0.1141 moles.

Therefore, the answer to the question is 0.1141 moles of perchlorate ions to 4 decimal places.

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Answer:

elements or compounds

Answer:

1. 1.56 M

2. Water →  0.803

Ethanol → 0.197

3. - 8.07°C

Explanation:

1. To solve this problem, we need benzene's density in order to determine the volume.

We assume the volume of solvent, as the volume of solution

Density for benzene is 0.8786 g/mL.

Density = m/V → V = m/density

Volume = 217 g /0.8786 g/mL = 247 mL

We convert the mass to moles and then, to mmoles

49.3 g . 1mol / 128g . 1000mmol / mol = 385.1 mmol

M = 385.1 mmol / 247mL = 1.56 M

2. We determine moles of each, solute and solvent

94.2 g. 1mol /18g = 5.23 moles of water

58.7 g . 1mol /46g = 1.28 moles of ethanol.

Total moles = 5.23 + 1.28 = 6.51

Mole fraction of water = Moles of water / Total moles

Mole fraction of ethanol = Moles of ethanol / Total moles

Water → 5.23 / 6.51 = 0.803

Ethanol →  1.28 / 6.51 = 0.197

3. Freezing point depression → ΔT = Kf . m . i

i = Van't Hoff factor, ions that are present in the solution.

As the solute is organic, i = 1.

Kf = 1.86 °C/m

m = molality (moles of solute in 1kg of solvent)

2.17 mol / 0.5kg = 4.34 m

ΔT = Freezing T° of pure solvent - Freezing T° of solution.

We replace data → 0° - Freezing T° of solution = 4.34m . 1.86°c/m . 1

Freezing T° of solution = - 8.07°C

The convection current pictured is associated with the sea breeze phenomenon, so the type of wind that is part of this convection current is D Sea Breeze.

Sea breeze is a local wind that is created by the temperature difference between the land and sea surfaces. During the day, the land surface heats up faster than the sea surface. This causes the air above the land to rise, creating a low-pressure area. Meanwhile, the air above the sea remains cooler and denser, creating a high-pressure area. The pressure difference between the land and sea causes air to flow from the sea to the land, resulting in the sea breeze.

In the picture, we can see that the arrows indicate air moving from the sea towards the land. This corresponds to the direction of the sea breeze flow. Therefore, the type of wind that is part of this convection current is D  Sea Breeze.

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Answer: It's B Land Breeze I swear

Explanation: I took the test

The number of days it take for a 0.240-mol sample of radium to decay to 6.00×10−2mol is approximately 1.38 × 10^12 days.

The half-life of radium is 1,620 years.

We will use the equation that relates the initial number of moles, the final number of moles, and the decay constant. We'll start by finding the decay constant (k).The decay constant (k) can be determined using the following formula:

1/2 = e^(-kt), where t is the half-life in seconds.

The half-life of radium in seconds can be determined by multiplying 1620 years by 365.25 days per year and then multiplying by 24 hours per day and then 3600 seconds per hour.

1/2 = e^(-k(1620 years * 365.25 days/year * 24 hours/day * 3600 seconds/hour)) = e^(-k)(5.02 × 10^14 s)

ln(1/2) = -5.02 × 10^14 k

ln(2) = 5.02 × 10^14 k

K = (ln(2))/(5.02 × 10^14 s)K = 1.38 × 10^−17 s^−1

Now, let's find out how long it would take to decay from 0.240 mol to 6.00 × 10^-2 mol.0.240 = (6.00 × 10^-2) e^-kt

ln(4) = -kt

ln(4)/-k = t = 1.19 × 10^16 seconds

Therefore, the number of days it would take is:

1.19 × 10^16 seconds * (1 minute/60 seconds) * (1 hour/60 minutes) * (1 day/24 hours) = 1.38 × 10^12 days

So, it would take approximately 1.38 × 10^12 days for a 0.240-mol sample of radium to decay to 6.00 × 10^-2 mol.

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Answer:

Full answer in explanation

Explanation:

Hope this helps!

Answer:

2, 3, 5

Explanation:

just the person above

The correct answer is the Ionization energy tends to increase across a period because electrons are added to the same main energy level and the ionization energies of elements in Group 13 tend to be lower than the elements in Group 2 because the full S orbital shields the electron in the p orbital from the nucleus.

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The rate of a reaction catalyzed by an enzyme that has a single polypeptide chain is may be increased or decreased by temperature. Option D is correct.

The rate of the reaction is catalyzed by an enzyme which has a single polypeptide chain will be influenced by various factors.

Allosteric effectors: Allosteric effectors are molecules that can bind to a specific site on the enzyme (allosteric site) and either activate or inhibit its activity. In the case of an enzyme with a single polypeptide chain, it is less likely to have allosteric sites. Therefore, option (a) is unlikely.

Allosteric effectors: Similarly, since an enzyme with a single polypeptide chain is less likely to have allosteric sites, it is also less likely to be inhibited by allosteric effectors. Therefore, option (b) is unlikely.

pH effect: The rate of a reaction catalyzed by an enzyme can be influenced by pH. However, stating that it is always accelerated by increasing the pH is incorrect. Enzymes have an optimal pH at which they exhibit maximum activity. Deviating from this optimal pH can lead to a decrease in enzyme activity. Therefore, option (c) is incorrect.

Temperature effect: The rate of a reaction catalyzed by an enzyme can be increased or decreased by temperature. Generally, as temperature increases, the rate of the reaction also increases due to increased molecular motion and collision frequency. Therefore, option (d) is correct.

Substrate concentration: The rate of an enzymatic reaction is typically dependent on the substrate concentration. At low substrate concentrations, the reaction rate may increase as more substrate molecules are available for binding to the enzyme. Therefore, option (e) is incorrect.

Hence, D. is the correct option.

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Calculate the number of days' supply by subtracting the total of drops given by the quantity of drops necessary for each day's dose, with a conversion ratio of 20 drips per milliliter.

The production is indeed a ratio of the level input amount of each ingredient, and the functional form is represented as Q = methods calculate, L, P, H). Of fact, not all firms need the same production parameters or input quantities.

Instead, the ending inventory will need to be added to the cost of products sold and subtracted from the beginning inventory in order to determine the total purchases. Most businesses will keep track of their supplier purchases, therefore this estimate may not be accurate.

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This issue can be resolved using the coupled gas law:

P1V1 T1 P2V2 T2where P1, V1, and T1 stand for the beginning pressure, volume, and temperature while P2, V2, and T2 stand for the ultimate pressure, volume, and temperature.When the given values are added to the equation, we obtain:2.23 atm (16.8 L)/T1 = 5.26 atm (11.6 L)/313 KWhen we simplify the equation and find T1, we obtain:

T1 is equal to (2.23 atm x (16.8 L x 313 K) / (5.26 atm x 11.6 L).

= 404.7 KThe gas's starting temperature was therefore roughly 404.7 K
the about some tere temperture while about addedfe therd  tere and some one where so that value time stand

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A pitcher of orange juice flow smoothly when you transfer it to another container because of lower viscosity value and large proportion of water in it.

Viscosity is the resistance of a fluid to a change in shape or movement of portions as compared to one another. High viscous moves slowly as compared to less viscous.

So we can conclude that a pitcher of orange juice flow smoothly when you transfer it to another container due to lower viscosity.

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Answer:

Green

Explanation:

By using the pollution prevention hierarchy, scenarios that are preferred from least to most are Least Preferred: Scenario (a) - Treatment of ammonia nitrogen to nitrate nitrogen at a wastewater treatment plant before discharge. Next: Scenario (d) - Recycling by recovering nitrogen as struvite for fertilizer. Next: Scenario (b) - Source reduction by using urine as fertilizer in a backyard garden. Most Preferred: Scenario (c) - Source reduction through backyard composting of food scraps.

Ranking the scenarios from least to most preferred based on the pollution prevention hierarchy:

Scenario (a): This scenario involves transforming ammonia nitrogen to less toxic nitrate nitrogen at the wastewater treatment plant and then discharging it into a receiving water body. This is a form of treatment, which is less preferred compared to source reduction or recycling.

Scenario (d): In this scenario, nitrogen in the wastewater is precipitated out and recovered as struvite for use as fertilizer. This is an example of recycling, which is more preferred than treatment or disposal. However, it is still not as preferred as source reduction.

Scenario (b): The collection of urine and its application as fertilizer in a backyard garden is an example of source reduction. This is a more preferred option compared to treatment, recycling, or disposal since it reduces the need for synthetic fertilizers and utilizes a natural waste product.

Scenario (c): The homeowner deciding to set up a backyard composting machine for food scraps is also an example of source reduction. This is the most preferred option among the given scenarios as it eliminates the need for treatment, recycling, or disposal. Composting allows organic waste to be converted into nutrient-rich compost, reducing waste and providing a beneficial product for soil.

Hence, the hierarchy is scenarios a, scenarios d, scenarios b, scenarios c

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Answer:

SO₃(g) + H₂O(l) → H₂SO₄(aq)

Explanation:

The molecular formula for the involved species are:

With the above information in mind we can proceed to write the reaction equation:

The volume of pure gold has a mass of 65.4g and a density of 9.3g/cm3 is   3.3886 cm3.

Solution :

∵ density = mass ÷ volume

⇒ volume = mass ÷ density

∴ volume of pure gold = (mass of gold) ÷ (density of gold)

                                      = 65.4 ÷ 19.3

  The volume of pure gold = 3.3886 cm3

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