Select the name for an amine that has the following structural formula: (CH3)2-CH-CH2-CH2-CH2-CH2-NH2. Expert Answer. Who are the experts?

Explanation:

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Answer:

17.04%

Explanation:

Actual Value = 173.1

Measured Value = 143.6

Percent error is obtained using the equation;

Percent error = (Measured - Actual) / Actual ]* 100

Percent error = [ (143.6 - 173.1) / 173.1 ] * 100

The absolute value of (Measured - Actual) is taken,

Percent Error = [29.5 / 173.1 ] * 100

Percent Error = 0.1704 * 100 = 17.04%

Answer: A typical hydrogen fuel cell produces 0.5 V to 0.8 V per cell. To increase the voltage individual cells can be connected in series.

Answer:

See explanation

Explanation:

The reduction potential of Cr III is more negative than that of NH4+ hence NH4+ will be displaced by Cr III from a solution of its salt according to the following reaction equation;

Cr2(SO4)3 + 2(NH4)3PO4--------->2CrPO4 + 3(NH4)2(SO4)

Hence;

A reaction occurs when aqueous solutions of chromium(III) sulfate and ammonium phosphate are combined.

The general method/rule/formula for calculating where a ball will land depends on various factors such as the initial velocity, angle of projection, air resistance, and gravity.

In general, the most common method to calculate the landing position of a projectile is to use the kinematic equations of motion, which relate the position, velocity, and acceleration of an object. These equations can be used to determine the time it takes for the ball to hit the ground and the horizontal distance it travels during that time.

However, the calculation can become more complex when considering factors like air resistance and varying conditions, and may require more advanced mathematical models.

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Answer: The gas generated by two antacid tablets has a smaller volume.

Explanation:

Since the antiacid is the limiting reagent, we know that the more tablets there are, the more gas there will be.

This means that there will be more gas generated by the four antiacid tablets when compared to the two antiacid tablets, which gives us that the gas generated by the two antiacid tablets has a smaller volume.

The ideal gas law may be used to determine the volume of oxygen created in the electrolysis that produces 548 litres of hydrogen at STP (Standard Temperature and Pressure). PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature, according to the ideal gas equation.

The pressure is 1 atm, the temperature is 273 K, and the number of moles of hydrogen is 548/22.4 = 24.5 in this example. We may compute the volume of oxygen created by rearranging the ideal gas law: V = nRT/P = 24.5*0.082*273/1 = 483.3 litres.

As a result, the volume of oxygen created in the electrolysis at STP that produces 548 litres of hydrogen is 483.3 litres.

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The electrochemical cell converts the electrical energy from chemical reaction, while the daniel cell works with the zinc and the copper cathode.

Working Of Electrochemical Cell:

Electrochemical cell is a working device which is commonly used to generates the electrical energy from the chemical reactions. The electrochemical cell device has the ability for converting the chemical energy into electrical energy.

In electrochemical cell the electrons moves into the cathode.

Working Of Daniel Cell:

The daniel cell works if we dissolve the zinc and the plating on the copper cathode and also by providing the positive potential difference of 1.1 V. The daniel cell only works in the forward direction process and it does not works in the direction of reverse process. The reason behind this is that the copper atoms are more closely and strongly bounded in the solid metal than zinc atoms.

So we can conclude that the electrochemical cell converts the electrical energy from chemical reaction, while the daniel cell works with the zinc and the copper cathode.

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Answer:

I cant see it that well but id be happy to help if u post a clearer picture!

Explanation:

Answer:

joib

Explanation:

The statement which best describes the impacts that building dams can have on wildlife and the environment include the following: C) When a dam is built on a river, it increases the available water, allowing people to irrigate crops and raise livestock, and it allows the inhabitants of the river to move freely along the length of the river.

A river can be defined as a large natural body of fresh water that continuously flow into an ocean, lake, sea or another river. Additionally, some examples of a river include the following:

Generally speaking, a dam can be built on a river in order to increase the availability of water, which then allows people to irrigate their crops and raise livestock, without affecting the free movement of the living organisms living in the river.

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The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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Answer:

Science is:

objective

based on fact

must be ethical

Explanation:

Science is considered to be objective because it is based on empirical evidence and systematic observation, and it strives to eliminate personal bias and opinions from the scientific process. Science is based on fact, as it relies on repeatable and verifiable experiments to test hypotheses and theories. And, it is important for science to be ethical because the scientific community has a responsibility to ensure that research is conducted in an ethical and responsible manner, and that the results are reported accurately and honestly.

The body of scientific knowledge is based on different Observations (Option C).

Observations in the scientific method are fundamental because it is the first step to raising scientific questions that may be explained through plausible hypotheses. Subsequently, hypotheses must be tested by experimental procedures.

In conclusion, the body of scientific knowledge is based on different Observations (Option C).

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The temperature of the reaction should be decreased

This change in temperature would make the equilibrium to shift to the right.

The Le Chatelier's principle, commonly referred to as the Le Chatelier's principle of equilibrium, is a chemical principle that describes how an equilibrium system reacts to environmental changes.

According to this theory, when an equilibrium system is exposed to an outside force, it will respond in a way that partially offsets the imposed change and restore equilibrium.

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Answer:

45.24

Explanation:

10.24+35=25.24

Answer:

1. C. thunderstorm

2. D. can trap polluted air causing health problems

3. C. mesocyclone

4. B. a cyclone

Explanation:

A temperature inversion happens as a result of warm air developing over a layer of cooler air.

A thunderstorm is a violent weather with strong winds, lightning, thunder, heavy rain fall and dense clouds. This occurs when warm air rise in an updraft to cooler atmosphere.

Answer:

1. Thunderstorm  

2.can trap polluted air causing health problems

3.mesocyclone

4.typhoon in the northern hemisphere

Explanation:

Order zero. Concentration data is commonly monitored during a reaction to determine the order with respect to a reactant. Consider the types of observations listed.

Observations are the data collected through direct or indirect means. It is the process of gathering information by watching, listening, and measuring in order to gain knowledge and understanding. Observations can be qualitative, meaning they involve descriptions and subjective information, or quantitative, meaning they involve measurements and objective information. Examples of observational data include surveys, interviews, audio recordings, video recordings, and physical measurements. Observations are used to learn more about the world around us and to make informed decisions.

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The freezing point constant for the unknown solvent is  1.19°C.

The term freezing point is defined as  the temperature at which a liquid becomes a solid.

Given,

Mass of urea = 2.02g

Molar Mass of urea = Mass of urea ÷ Molar mass of urea

 = 2.02 ÷ 60.06 g/mole                      

Mass of solvent = 25.0 g.    

25.0 g = 2.5 × 10-3 kg

Molality is the ratio of number of Moles of solute divided by mass of solvent in kg -

Molality of urea = moles of urea ÷ Mass of solvent in Kg

= 2.02 g ÷ 60.06 g/mole × 25.0 × 10-3 kg                  

= 1.3453213453 mole/Kg                

In step 1

Freezing point of solvent = 36.3°C

Freezing point of solution = 34.7°C

∆ T = T

= 36.3°C - 34.7°C

∆T =   1.6°C

Therefore,

T= Freezing point of solution

T0 = pure freezing point of solvent

∆T = Depression in freezing point

According to colligative property

∆T = K × M

So,

∆T = depression on freezing point

K = Molal depression constant

M = Molality of urea

K = ∆T ÷ M

1.6°C ÷ 1.3453213453 mol/Kg

K = 1.19°C

Thus, The freezing point constant for the unknown solvent is 1.19°C.

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Explanation:

weathering is correct answer thanks

Answer:

Your answer would be:
C.) Nitrogen Cycle

Nitrogen moves continuously between the atmosphere and soil in what is called the nitrogen cycle.

Explanation:

The nitrogen cycle is the biogeochemical cycle describing how nitrogen moves through the biosphere and atmosphere. The nitrogen cycle is a lot like the carbon and water cycle. Rainstorms contribute atmospheric nitrogen through raindrops that reach the soil. Plants, such as soybeans, alfalfa, and clovers, are plants that can convert atmospheric nitrogen into plant-usable nitrogen.


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Answer:

[H₃O⁺] = 0.0507 M

pH = 1.29

Explanation:

23.1 g of HCI (a strong acid) is added to water to make 1250 mL of solution. Calculate [H₃O⁺] and pH of the solution.

Step 1: Given data

Step 2: Calculate the concentration of HCl

We will use the following expression.

[HCl] = mass HCl / molar mass HCl × liters of solution

[HCl] = 2.31 g / 36.46 g/mol × 1.250 L

[HCl] = 0.0507 M

Step 3: Calculate the concentration of H₃O⁺

HCl is a strong acid according to the following equation.

HCl(aq) + H₂O(l) ⇒ H₃O⁺(aq) + Cl⁻(aq)

The molar ratio of HCl to H₃O⁺ is 1:1. Then, [H₃O⁺] = 0.0507 M.

Step 4: Calculate the pH of the solution

We will use the following expression.

pH = -log [H₃O⁺]

pH = -log 0.0507

pH = 1.29

The sample of air should be heated to 252 Kelvin (K) to increase its volume by 25%.

It is possible to determine the temperature to which the sample of air should be heated by using the concept of the ideal gas law. PV = nRT is the ideal gas law, and it relates the pressure (P), volume (V), number of moles (n), temperature (T), and gas constant (R). we can focus on the relationship between volume and temperature since the number of moles and pressure are assumed to be constant.

By showing the increase in volume as a percentage (25%), we can make the equation (V+0.25V)/T = V/T, where V represents the initial volume of the air.

On making the equation simple, we find  Tfinal / Tinitial = 1.25.

To solve for Tfianal, the final temperature,

Tfinal = Tinitail / 1.25

On substituting the initial temperature value of 315K into the equation, we will be getting;

Tfinal = 315K / 1.25

Tfinal = 252K

Hence, the sample of air should be heated to 252 Kelvin (K) in order to increase its volume by 25%.

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Answer:

enantiomeric excess = 68%

Explanation:

Enantiomeric excess is a value used to determine the purity of chiral molecules. It is possible to determine enantiomeric excess (ee) using:

ee = R - S / R + S * 100

Where R is the mass (In this case percentage) of the R enantiomer and S of the S enantiomer.

Replacing with values of the problem:

ee = 84% - 16% / 84% + 16% * 100

Answer:

The temperature in degrees Celsius of a 7.00 L tank containing 13.57 g of H2 gas (mM = 2.016 g mol-1) if the tank has a total pressure of 6177 Torr and the H2 gas is behaving ideally is approximately -128.11°C. This temperature is calculated using the ideal gas law equation, which relates temperature, pressure, and the amount of gas in the tank.

Answer:

First one is a compound.  Second one is single atom and single element. third one is a molecule.

Explanation:

Answer:

d

Explanation:

i looked it up

Mechanical energy is not a form of kinetic energy. Hence, option D is correct.

Kinetic energy is a form of energy that an object or a particle has by reason of its motion.

Mechanical energy is the sum of the kinetic energy, or energy of motion, and the potential energy, or energy stored in a system by reason of the position of its parts.

Hence, option D is correct.

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A methane molecule (CH4) is considered symmetrical because it possesses a symmetric structure and exhibits symmetry operations.

Symmetry refers to a balanced arrangement of elements that can be divided into equal parts by a plane, axis, or center. In the case of methane, it exhibits several symmetrical characteristics.

Firstly, methane has a tetrahedral molecular geometry, with the carbon atom at the center and four hydrogen atoms positioned around it. This geometry ensures that the molecule is symmetrical in terms of its spatial arrangement.

Each hydrogen atom is located at one of the vertices of the tetrahedron, forming equal angles and distances with respect to the central carbon atom. This symmetry is maintained regardless of the orientation of the molecule.

Additionally, methane possesses rotational symmetry. It can be rotated around any of the carbon-hydrogen bonds, and the molecule will retain its overall appearance.

The symmetry of methane arises from its molecular structure and the equal distribution of electron density around the central carbon atom. The four hydrogen atoms are bonded to the carbon through sigma bonds, which have a cylindrical symmetry. This balanced arrangement of the atoms contributes to the overall symmetry of the molecule.

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In terms of yield, the repeated extraction technique is more efficient.

The residue left over after extraction contains the same amount of material as the extract itself. If you extract again, both the concentration in the extract and the residue will be decreased.

Therefore, with several extractions, there will be less material left in the residue, meaning the extraction will be more thorough.

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It is likened to a fictional scenario in which a team of scientists and "sci-operatives" are working on upgrading their Battle Armor to withstand the attacks from a fictional entity called "THE HIVE."

The team is using thermodynamics, the study of heat energy and its transformations, to analyze the effectiveness of the materials used in the Battle Armor, including silver.

In this scenario, Mr. Pauling is creating a report that analyzes the heating curve for silver, which is used in the Battle Armor. The heating curve shows the changes in temperature over time as heat energy is added, and it helps to determine the melting and boiling points of the substance, as well as the conditions needed for a phase change.

It seems like the purpose of the activity is to understand the use of thermodynamics in analyzing the effectiveness of materials in the Battle Armor, and to look for messages from Mr. Pauling regarding any unfinished parts of the report.

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