Which planet in the solar system is least dense

Answer:

As organisms release energy during cellular respiration, carbon dioxide is produced from the carbon in energy storage molecules. ... Carbon dioxide in the biodome decreased because decomposers decreased which means there was a decrease in cellular respiration overall.

btw :

stay safe! :3

The skin sensitivity best describes a strong mineral (inorganic) acid. An acid that is generated from one or more inorganic substances is known as an inorganic acid, sometimes known as a mineral acid.

When dissolved in water, all inorganic acids produce hydrogen ions as well as conjugate base ions. The inorganic acids sulfuric acid (H2SO4), hydrochloric acid (HCl), and nitric acid are frequently utilized (HNO3). Use at a minimum the normal lab attire—closed-toe shoes, long pants, a lab coat, safety glasses with side shields or splash goggles, gloves—at all times when working with acids. A laboratory fire could happen because many of the solvents and compounds used in organic chemistry labs are highly combustible. If a fire does start, take a step back and then alert the lab instructor and anybody else working nearby right away.

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The major organic product is 2-ethylbutan-2-ol (C₅H₁₂O):

CH₃CH₂CO₂CH₂CH₃ + NaOEt --> CH₃CH₂CO₂CH(CH₃)CH₃

CH₃CH₂CO₂CH(CH₃)CH₃ + H₂O --> 2-Ethylbutan-2-ol + Na⁺ + OH⁻

With very few exceptions, chemicals, regardless of their source, are classified as organic if they contain at least one carbon atom. For this reason, organic chemistry is called "the chemistry of carbon". Generally, this carbon atom is bonded to at least one hydrogen atom.

The basic types of reactions in organic chemistry are addition reactions, elimination reactions, substitution reactions, pericyclic reactions, rearrangement reactions, photochemical reactions, and redox reactions. Organic synthesis uses organic reactions to build new organic molecules.

Examples of organic compounds are carbohydrates, fats (lipids), proteins and nucleic acids, which are the building blocks of the molecules of life.

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Answer:

Ability to form four covalent bonds.

Explanation:

Carbon is the first member of group 14. It is essentially a nonmetal. It is a small atom which regularly exhibits tetra valency. This means that carbon is able to form four covalent bonds to four chemical species which may be the same or different each time. This leaves room for many different possible combination patterns of carbon with other chemical species.

Hence carbon forms a very large number of compounds due to its small size and its ability for form four covalent bonds to other chemical species in any bonding situation.

Answer: the ability to form four covalent bonds

Explanation:

C/ If Fe is greater than Fg, the negatively charged oil droplet will move freely toward the negatively charged plate.

In the Millikan oil droplet experiment, the negatively charged oil droplets are subjected to an electric field created by the charged plates. The electric force (Fe) acts on the oil droplet in a direction opposite to the gravitational force (Fg). When Fe is greater than Fg, the electric force overcomes the gravitational force, causing the negatively charged oil droplet to experience an upward force. As a result, the oil droplet moves freely upward toward the negatively charged plate.

Option B is incorrect because if Fe is equal to Fg, the forces balance each other, resulting in a stationary droplet. However, the question states that Fe is increased until it is greater than Fg, implying that the droplet is no longer stationary but moves in response to the electric force.

Therefore, option C is the correct answer, as it describes the effect of an electric field on the motion of a negatively charged oil droplet in the Millikan oil droplet experiment.

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Answer:

[MgCl₂] = 1.05 m

Explanation:

Molality is a type of concentration that indicates the moles of solute in 1000g of solvent.

m = mol/kg.

Our solute is MgCl₂. We convert mass to moles:

25 g . 1mol / 95.21 g = 0.262 moles.

Our solvent is water → 250 mL of H₂O

We use density to determine the mass: density = m / V

Density . V = m → 0.9975 g/mL . 250 mL = 249.3 g

We convert from g to kg = 249.3 g . 1kg/1000g = 0.2493kg

molality → 0.262 mol /0.2493kg = 1.05

Answer: The bus traveling 200km in 6 hours is traveling the fastest.

Explanation:

Bus 1

150km/5hrs

Simplify -> 30km/hr

Bus 2

200km/6hrs

Simplify -> About 33.333km/hr

Answer:

Hope this helps

Explanation:

hjnm

Answer: C. Na2B4O7•10H2O

Explanation:

Hope this helps :)

The formula is tetrasodium borate-Na2B4O7.10H2O

Given- 0.0132 mol Na2B4O7 and 0.1311 mol H2O

Using the molar mass of the anhydrous Na2B4O7 and its mass percentage, we can calculate the molar mass of the hydrate (if we look at it as 100% of the mass) by stoichiometry.

Molar mass of Na = (22.990 g/mol)

Molar mass of B = (10.811 g/mol)

Molar mass of O = (15.999 g/mol)

Molar mass of Na2B4O7= 2⋅22.990 g/mol +4⋅10.811 g/mol +7⋅15.999 g/mol = 201.217 g/mol

201.217g/mol : 52.8%=x g/mol : 100%

​x g/mol = 201.217 g/mol⋅100%÷52.8 %

x g/mol= 381.093 g/mol

In 381.093 g of hydrate, we have 201.217 g of anhydrous Na2B4O7 , the rest of the mass is water.

381.093g−201.217g= 179.876 g of water

Molar mass of H = 1.008 g/mol

Molar mass of O = 15.999 g/mol

Molar mass of  H2O= 1.008 g/mol+ 15.999g/mol  = 18.015 g/mol

179.876g ÷18.015 = 9.98= 10 moles of water per mole of hydrate.

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The molar solubility of Li3PO4 in a 1M LiCl solution is 2.37 x 10^-4 M. To calculate the molar solubility of Li3PO4 in a 1M LiCl solution, we need to use the common ion effect.

This effect occurs when a salt that contains an ion in common with the solute is added to the solution, which reduces the solubility of the solute. In this case, the common ion is Li+ from LiCl. We can use the Ksp equation for Li3PO4 and the equilibrium expression for LiCl to solve for the molar solubility of Li3PO4.

Ksp = [Li+]^3[PO4^-3]

[Li+] = 1M (from the LiCl solution)

2.37 x 10^-4 = (1M)^3 [PO4^-3]

[PO4^-3] = 2.37 x 10^-4 / (1M)^3

[PO4^-3] = 2.37 x 10^-4 M

Therefore, the molar solubility of Li3PO4 in a 1M LiCl solution is 2.37 x 10^-4 M.

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In order to convert phenol primarily to ortho-bromophenol, we can use a method called electrophilic aromatic substitution. This involves adding an electrophile to the aromatic ring of the phenol, which will replace one of the hydrogen atoms and result in the formation of a substituted product.

One way to achieve this is by using bromine as the electrophile. We can start by adding bromine water to the phenol, which will form a complex with the bromine. Next, we can add a strong acid such as hydrochloric acid to protonate the phenol and make it more reactive. This will help to generate the electrophile, which can then attack the ortho position of the aromatic ring.
To ensure that ortho-bromophenol is formed primarily, we can control the reaction conditions by using a mild temperature and carefully controlling the pH of the reaction mixture. By doing this, we can prevent the formation of unwanted by-products such as para-bromophenol and meta-bromophenol.

In summary, to convert phenol primarily to ortho-bromophenol, we can use electrophilic aromatic substitution with bromine as the electrophile, and control the reaction conditions to promote ortho selectivity. This synthesis can be carried out in a laboratory setting, and is an important step in the preparation of various organic compounds.

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The given statement "Modern vehicles are designed to crush when they crash to absorb kinetic energy" is true. Because, Modern vehicles are designed with safety features that include controlled deformation or "crumple zones" to absorb kinetic energy during a crash. Option A is correct.

These crumple zones are strategically placed in the front and rear of the vehicle and are designed to collapse and deform upon impact.

When a vehicle collides with an object or another vehicle, the kinetic energy of the moving vehicle is converted into various forms of energy, including deformation energy. By allowing certain parts of the vehicle to crush or deform, the kinetic energy is absorbed and dissipated over a longer period of time, reducing the force transmitted to the occupants.

The purpose of designing vehicles to crush during a crash is to enhance occupant safety. By absorbing and dissipating energy through controlled deformation, the impact forces on the occupants are reduced, which can help minimize the risk and severity of injuries.

Hence, A. is the correct option.

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The balanced reaction that shows incomplete combustion is  2C4H10 + 5O2 → 4CO + 6H2O.

option D.

The balanced equation for incomplete combustion involves a reactant, usually a hydrocarbon fuel, reacting with a limited supply of oxygen to produce carbon monoxide (CO) instead of carbon dioxide (CO2) and water (H2O).

Out of the options given, the balanced equation that shows incomplete combustion is:

D. 2C4H10 + 5O2 → 4CO + 6H2O

This equation shows incomplete combustion because it produces carbon monoxide (CO) instead of carbon dioxide (CO2). The equation is balanced because there are equal numbers of atoms of each element on both the reactant and product sides of the equation.

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The concentration (M) of sodium ions in a 0.268 mol/L Na3P solution can be calculated by considering the stoichiometry of the compound. The concentration of sodium ions in the 4.57 L Na3P solution is 0.268 M

In this case, the concentration of Na3P is 0.268 mol/L, and the volume of the solution is given as 4.57 L. Multiplying these values together gives us the number of moles of Na3P in the solution, which is 1.225 mol. Since there are three sodium ions per molecule of Na3P, the number of moles of sodium ions is also 1.225 mol.

To find the concentration of sodium ions, we divide the number of moles of sodium ions by the volume of the solution. Therefore, the concentration of sodium ions in the 4.57 L solution is 1.225 mol / 4.57 L = 0.268 M.

In summary, the concentration of sodium ions in the 4.57 L Na3P solution is 0.268 M, obtained by considering the stoichiometry of Na3P and dividing the number of moles of sodium ions by the volume of the solution.

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A. If motion starts and stops at the same location, then the displacment is zero.

D. Distance is always greater than or equal to the magnitutde of the displacement.

Sodium-22 undergoes electron capture according to the following nuclear equation: 0−1e+2211Na→2210Ne

A synthetic isotope called sodium-22 has a half-life of 2.6 years. It undergoes a steady neon-22 decay, producing a positron (+ decay). Only 0.06% of the decays result in the ground state of neon, which is a very modest percentage. The remainder produces an excited state of neon, primarily through positron emission but also, to a lesser extent, through electron capture (9.5%) from the inner atomic shell. A quantum with a 1275 keV energy is released when the excited neon state transitions into the ground state. This enthusiastic neon only has a 3.7 ps lifespan.

The surrounding matter's electrons and the emitted positrons interact to produce a distinctive annihilation radiation at 511 keV. The pair annihilation of a positron and an electron results in the production of two quanta due to momentum conservation.

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Answer:

Explanation:

the flow would get smaller

Answer:

While both the ethanol and the water eventually will reach the same temperature, the ethanol will cool first. Thus, the correct answer is D.

Explanation:

The specific heat capacity of a substance is the amount of heat energy required to raise the temperature of a unit mass of the substance by 1 °C. We're told that ethanol's specific heat capacity is 2.671 J/g °C and water's is 4.184 J/g °C.

Ethanol has a lower specific heat capacity than water. This means that for a given amount of energy, the temperature of a given mass of ethanol will increase by a greater amount than the same mass of water. Therefore, ethanol requires less energy to raise its temperature by 1 °C. Conversely, this also means that ethanol will lose heat at a faster rate than water; when ethanol and water are placed in a cooler environment, the ethanol will lose heat at a faster rate than the water and therefore cool down faster.

When energy is added to a substance, its temperature increases; when energy is removed from a substance, its temperature decreases. The change in a substance's temperature is inversely proportional to the substance's specific heat capacity. When both the ethanol and the water are placed in cooler surroundings, heat will flow from them to the environment until thermal equilibrium is reached. So, while both the ethanol and the water will eventually reach thermal equilibrium with their surroundings (i.e., they will both reach the same temperature at the end), ethanol will lose heat at a faster rate than water, and therefore it will cool down faster.

1.81 x 10^24 Br-ions are present in 1.00 moles of FeBr3

Avogadro's number of representative particles is included in one mole of a substance.

6.02 x 1023 particles make up 1 mole.

How many of each sort of atom there are in a typical particle is indicated by the chemical formula of the molecule. One mole of iron(III) ions and three moles of bromide (Br-) ions make up the formula FeBr3, which states that. The quantity of Br- ions is thus:

1.81 × 1024 Br- ions from 3 x 6.0223

When thinking about atoms and molecules, a mole is a helpful unit of measurement. Compounds are created when modest whole-number ratios of atoms mix. Quantities are reported in moles for the purpose of employing mathematical relationships in computations since atoms of various elements have different masses. For instance, the proportion of iron(III) ions to bromide ions in FeBr3 is the same as the proportion of moles of iron(III) ions to moles of bromide ions, but not the proportion of masses of the two types of ions.

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Dynamic equilibrium can be defined as rate of dissolution = rate of deposition. So, option D is correct.

Once a reversible reaction takes place in chemistry, a dynamic equilibrium is present. There is no net change because substances transition equally between reactants and products. The rate at which reactants and products form ensures that neither of their concentrations change. It is an example of a system that is in a constant state specifically.

An equation's equilibrium can be altered and pulled out of dynamic equilibrium by altering the temperature, pressure, or concentration of a reaction. This is the reason why if you open a Coke can and leave it outside for a while, it will ultimately turn "flat" and no longer have any bubbles. This is due to the fact that the soda can is no longer a closed system and the carbon dioxide is now free to interact with the environment. This throws it out of dynamic equilibrium and lets out carbon dioxide gas until there are no bubbles left.

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The complete question is:

Dynamic equilibrium can be defined as:

A) rate of bubbling > rate of dissolving

B) rate of dissolution > rate of deposition

C) rate of dissolution < rate of deposition

D) rate of dissolution = rate of deposition

Answer: Atoms contain tiny, negatively charged electrons

Explanation: Thomson's experiments with cathode ray tubes helped him to discover the electron (which Dalton did not know about). Dalton thought that atoms were indivisible particles, and Thomson's discovery of the electron proved the existence of subatomic particles.

The mass of 0.5 mole of the element is approximately 6.025 grams.

To calculate the mass of 0.5 mole of the element, we need to know the molar mass of the element.

Given that the mass of 2 x 10^21 atoms of the element is 0.4 grams, we can use this information to find the molar mass.

The number of atoms in 1 mole of any substance is given by Avogadro's number, which is approximately 6.022 x 10^23 atoms/mol.

First, we calculate the molar mass of the element using the given information:

Molar mass = Mass of 2 x 10^21 atoms / Number of moles of 2 x 10^21 atoms

Molar mass = 0.4 g / (2 x 10^21 atoms / (6.022 x 10^23 atoms/mol))

Molar mass ≈ 0.4 g / (3.32 x 10^-2 mol)

Molar mass ≈ 12.05 g/mol

Now that we know the molar mass of the element is approximately 12.05 g/mol, we can calculate the mass of 0.5 mole of the element:

Mass = Molar mass x Number of moles

Mass = 12.05 g/mol x 0.5 mol

Mass = 6.025 grams

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Answer: thinking

Explanation:

A mental disorder are ways of unusual feeling, or acting that are thinking. Therefore, option A is correct.

A clinically significant impairment in a person's intellect, emotional control, or behavior is what is known as a mental disorder. It is typically linked to distress or functional impairment in key areas.

Mental illness has many causes, not just one. Your genes and family history are only two examples of the many variables that can increase your risk for mental illness. Your life experiences, particularly if they occurred as a youngster, such as stress or a history of abuse.

Depression is the most prevalent mental condition, affecting an estimated 300 million individuals, and often affects women more frequently than males.

Thus, option A is correct.

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Note that the Gas law formula that could be used to determined a desired value using the information given in the above graph is: the Ideal Gas Law.

The Idea gas law speaks to the pressure, volume, temprature and number of moles of a gas and expresses their relationships in the formula:


PV = nRT, where


P  = Pressure

V = Volume

n = Number of Moles and

R is the GAs constant.

Hence, it is correct to state that the he Gas law formula that could be used to determined a desired value using the information given in the above graph is: the Ideal Gas Law.

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Answer:

In order of the colors of the pH test papers from most acidic solutions to most alkaline solutions, the colors of the pH test papers would be

               Red > Orange/Pink > Purple > Blue

(Red) Most acidic                                (Blue)Most alkaline

Explanation:

We can use the different colors of pH test papers to determine the acidity or alkalinity of a solution.

Definitions

A pH test paper is a strip of indicator paper which changes colour when placed in acidic or alkaline solutions.

A solution is said to be acidic if it turns the colour of the pH test paper RED

A solution is said to be alkaline/basic if it turns the colour of the pH test paper BLUE

Color changes

If the pH test paper turns red, then the solution is a very strongly acidic solution with pH less than 3 ( ie pH between 1-3)

If the pH test paper turns orange or pink, then the solution is a weak acidic solution with pH greater than 3 ut less than 7

If the pH test paper turns purple, then the solution is a weak alkaline solution with pH greater between 8-11

If the pH test paper turns blue, then the solution is a very strong alkaline solution with pH between 11 - 14

Summary

Therefore, in order of color changes from the most acidic solutions to most alkaline solutions, the colors of the pH test papers would be

Red > Orange/Pink > Purple > Blue

Most acidic                                Most alkaline

Answer:

d<c<a<b

Explanation: