Witch part of an atom is mostly empty space?

Answer:

231.735 g/mol

Explanation:

The equilibrium constant for the reaction is  3.1 * 10-28 for a chemical reaction of standard Gibbs free energy at 149LJ/mole.

Standard Gibbs free energy is the formation of the compound is the change of Gibbs free energy that involves the formation of 1 mole of a substance in its standard state. The relation of Standard Gibbs free energy is

            ΔG° = -RT log K

  where,

          ΔG°= standard Gibbs free energy. that is 149 KJ/mole

            K= equilibrium constant

             R= gas constant , that is 8.314 J/K mole

              T=  temperature at 15°C is 283K

We have to convert  KJ in J. so 149 KJ/mole becomes 149000J/mole.

putting all the values in the relation of Gibbs free energy,

149000J /mole  =  -8.314 J/ K .183K .ln K

K=  3.1 * 10 -28

so the equilibrium constant of the reaction is calculated.

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In the question the value of standard Gibbs free energy is not given. question is incomplete. Solving this question by putting a certain value.

Explanation:

He needs 2.3 dkg

dkg is a unit of mass and represents dekagrams.

The relationship between dkg and g is given as;

1 dkg = 10g

This means he needs 2.3 * 10 = 23 g of graphite.

Since he already has 460g of graphite, he doesn't need any additional graphite.

Answer:

2 i think should be the correct answer

Explanation:

The polarity of 6 real molecules are given below,

O2- Neutral

HF- Acidic

H2O- Neutral

NH3- Basic

CF4-Nonpolar

CH3F-  Polar

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Answer:

Forests prevent desertification.

Explanation:

Combustion analysis of fluorene, a polycyclic aromatic hydrocarbon used to make dyes, plastics, and pesticides, produces 11.44 g CO2 and 1.80 g H2O. The empirical formula of fluorene C₆H₄.

CₓHₐ + O2 → CO2 + H2O Since the combustion is complete, so the total mass of the reactants is equal to the total mass of the reactants Therefore, Mass of O2 = (17.9 + 9.14) – 5.9 = 21.14 grams Here, the empirical formula for the hydrocarbon is CₓHₐ. So, now we have to need to determine the number of moles of the O2, CO2, and H2O :- Mole of CO2 = 17.9/44 = 0.4068 Mole of H2O = 9.14/18 = 0.5078 Mole of O2 = 21.14/32 = 0.6606. The empirical formula for the compound containing uranium and fluorine is UF6. Explanation: The empirical formula of a compound represents the lowest whole number ratio of elements in the compound. This ratio is represented by subscripts in the formula. by this information, we can consider that combustion analysis of fluorene, a polycyclic aromatic hydrocarbon used to make dyes, plastics, and pesticides, produces 11.44 g CO2 and 1.80 g H2O. The empirical formula of fluorene C₆H₄.

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Answer:

The net charge on the ion is negative 1(-1)

Explanation:

Negative 1(-1)

Answer:

2. 14

Explanation:

To form Br₂ bond, a total of 14 electrons are needed.

Bromine is an element in the 7th group on the periodic table. It has 7 valence electrons.

The statement that is NOT true about diazonium salts is d. Diazotization and coupling reactions must be performed at least 1 suppress the hydrolysis of the diazonium salt.

Diazonium salts are compounds that contain a positive charged nitrogen atom (N⁺) and are commonly used as intermediates in organic synthesis. They are formed through a reaction called diazotization, which involves the conversion of a primary aromatic amine to its corresponding diazonium salt by treating it with nitrous acid.

Aryldiazonium salts (where R is an aryl group) are used in the synthesis of commercially available dyes through coupling reactions between activated aromatic compounds. On the other hand, alkyldiazonium salts (where R is an alkyl group) are unstable and likely to decompose, giving a variety of products because N2 is far more stable than R-N2.

Aryldiazonium salts are moderately stable in water at 0 °C because the system of the aromatic ring stabilizes the pi system of the N2+, the diazonium ion. However, diazonium salts are generally unstable in water and can undergo hydrolysis to produce the corresponding phenol or amine. Therefore, diazotization and coupling reactions must be performed in a dry, organic solvent to suppress the hydrolysis of the diazonium salt.

Therefore, option d is NOT true as it states that diazotization and coupling reactions must be performed to suppress the hydrolysis of the diazonium salt, while in reality, these reactions are performed in dry, organic solvents to avoid hydrolysis.

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Answer: Yes! you're all good. Alkali metals in group 1 are the most metallic :)

Answer:

They would be carnivores.

Explanation:

Answer:

2.75M

Explanation:

Concentration(M)= mol/volume

0.0688mol/0.250L

=0.2752M

Answer:

They would probably be equal L and D stereoisomers

Explanation:

All amino acid (except glycine) can occur in two isomeric forms called L- and D- forms, because of the possibility of forming two different enantiomers around the central carbon atom known as the chiral center. The two enantiomers, have identical physical and chemical properties, but their interactions with other chiral molecules may vary.

A carbon chiral center occcurs when the carbon is bonded to four different substituents. Glycine, has no enantiomers because it has two hydrogen atoms attached to the central carbon atom.

When a compounds with chiral centers are synthesized in the laboratory randomly (in the absence of a directing template) left and right-handed molecules ( corresponding to L- and D- forms) of a compound will form in equal amounts known as a racemic mixture. This was the case when Louis Pasteur in 1848, investigated the crystalline sediment that accumulated in wine casks called paratartaric acid or racemic acid, a form of tartaric acid.

Answer:

By week 12, the placenta is formed and ready to take over nourishment for the baby. However, it continues to grow throughout your pregnancy. It's considered mature by 34 weeks.

Explanation:

Answer:

Explanation:

Heat energy always moves from hot to cold. The sunlight doesn't reach certain parts of the ocean due to it being so deep. The water above it absorbs it. So because this top water absorbs all the heat/energy, it is a lot warmer and is constantly transferring heat to the colder parts through kinetic energy. The warmer water has particles that have way more kinetic energy than the cold particles below it. And more kinetic energy means more movement, so that's why they transfer their heat to the colder particles.

I dont actually know if Im correct or not. Im just guessing based on what I know about physics.

The final molarity of the resulting solution is approximately 0.244 M.

To determine the molarity of the resulting solution, the student can use the formula:

M₁V₁ = M₂V₂

Where:

M₁ = initial molarity of the stock solution

V₁ = initial volume of the stock solution

M₂ = final molarity of the resulting solution

V₂ = final volume of the resulting solution

In this case:

M₁ = 1.00 M (stock solution molarity)

V₁ = 0.305 L (initial volume of the stock solution)

V₂ = 1.25 L (final volume of the resulting solution)

The student needs to solve for M₂, the final molarity of the resulting solution.

M₁V₁ = M₂V₂

(1.00 M)(0.305 L) = M₂(1.25 L)

M₂ = (1.00 M)(0.305 L) / (1.25 L)

M₂ ≈ 0.244 M

Therefore, the final molarity = 0.244 M.

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He is not falling nor about to fall which means he’s perfectly balanced. So this means the force in the photo and friction in this photo is in a balanced condition, balancing the boy.

In the given picture, the applied force and the force of friction are balanced. if two forces act in the direction to make the object in a balanced state.

If the forces are in a balanced state it does not change the motion of the object, and if it is in an unbalanced state, it causes to change in the state of the motion.

Therefore, the force of friction and the gravitational force are balanced is the correct option.

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The given question is incomplete, so the complete question image is attached in the image below.

The law of mass action for the given equation 3A(liq) + 2B(g) ⇌ 2C(g) + D(liq) can be written as:Kc = ([C]^2 [D]) / ([A]^3 [B]^2) where Kc is the equilibrium constant, [A], [B], [C], and [D] represent the equilibrium concentrations of the respective substances, and the exponents correspond to the coefficients in the balanced equation.

The law of mass action for the equation 3a(liq) 2b(g) ⇌ 2c(g) d(liq) states that the rate of the forward reaction is proportional to the product of the concentrations of the reactants (a and b) raised to their stoichiometric coefficients (3 and 2, respectively), while the rate of the reverse reaction is proportional to the product of the concentrations of the products (c and d) raised to their stoichiometric coefficients (2 and 1, respectively). This can be expressed mathematically as follows:

Kc = ([c]^2[d])/([a]^3[b]^2)

where Kc is the equilibrium constant, [a], [b], [c], and [d] are the molar concentrations of the respective species at equilibrium, and the square brackets denote concentration in units of moles per liter.

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In the inductive step of a proof, you need to prove the statement that If P(k) is true and then P(k+1) is true.

In the induction process, a charged object is brought near but not touched to a neutral conducting object. The presence of a charged object near a neutral conductor will force (or induce) electrons within the conductor to move.

The method can be extended to prove statements about more general well-founded structures, such as trees; this generalization, known as structural induction, is used in mathematical logic and computer science. Mathematical induction in this extended sense is closely related to recursion. Mathematical induction is an inference rule used in formal proofs, and is the foundation of most correctness proofs for computer programs.

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Answer:

527.184 J of heat is removed from a 21 g water sample if it is cooled from 34.0 ° C to 28.0 ° C.

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

When the heat added or removed from a substance causes a change in temperature in it, this heat is called sensible heat.

In other words, the sensible heat of a body is the amount of heat received or transferred by a body when it undergoes a change in temperature without there being a change in physical state (solid, liquid or gaseous). The equation that allows to calculate this heat exchange is:

Q = c * m * ΔT

Where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT=Tfinal-Tinitial is the change in temperature.

In this case:

Replacing:

Q= 4.184 \(\frac{J}{g*C}\) * 21 g* (-6 C)

Q= - 527.184 J

To lower the temperature, heat has to be given, for that the final temperature must be lower than the initial temperature; and it receives the name of transferred heat and has a negative value, as in this case.

527.184 J of heat is removed from a 21 g water sample if it is cooled from 34.0 ° C to 28.0 ° C.

Hey there!:

Mass = 17.92 g

Volume = 2.00 mL

Density =  ??

Therefore:

D = m / V

D = 17.92 / 2.00

D = 8.96 g/mL

Hope this helps!

The density of an object is obtained as the ratio of mass of an object to its volume.

In science, density is defined as mass per unit volume. The volume of an object is the same as the volume of water displaced by the object.

Since the volume of water rose by 2.00 mL, then the volume of copper is 2.00 mL.

The density is now; mass/volume

Mass = 17.92 g

Density = 17.92 g/2.00 mL

= 8.96 g/ml

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Answer:

The bottle is labeled pure so it probably is pure.

Explanation:

The actual formula for volume for a cube is the length multiplied by the width and then multiplied by the height. Since all three measurements are the same, the formula results in the measurement of one side cubed. For the example, 5^3 is 125 cm^3. Multiply the volume by the known density, which is the mass per volume.

The density of the cube is 1g/cm^3

Measurement of density contrasts the mass of an object with its volume. High density refers to the amount of matter in a given volume of an object.

The density of a substance indicates how dense it is in a particular area. Mass per unit volume is the definition of a material's density. In essence, density is a measurement of how closely stuff is packed. It is a special physical characteristic of a certain thing.

The Greek scientist Archimedes made the discovery of the density principle. If you are familiar with the formula and the relevant units, calculating density is simple. The letter D can also be used to signify density instead of the symbol.

Generally speaking, gases are less dense than liquids, while liquids are less dense than solids. This is a result of the fact that particles in solids are closely packed, those in liquids can slide past one another, and those in gases are unconstrained in their motion.

Therefore, the density of the cube is 1 g/cm^3

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An epoxide is a heterocyclic organic compound with an oxygen ring. The acid protonates the oxygen, which opens the ring and starts the process.

What exactly is carbocation?

A carbocation is a molecule with three bonds and a positively charged carbon atom. To put it simply, they are essentially carbon cations. It was previously known as carbonium ion. A carbocation is any even-electron cation having a significant positive charge on the carbon atom.

Because of an incomplete octet, carbon cations are particularly reactive and unstable in general.

To put it simply, carbocations do not meet the octet rule because they lack eight electrons.

According to the question, carbon hybridization in carbocation will be sp2 with a trigonal planar structure. There is also an empty p orbital, suggesting that it is electron-deficient. Carbon contains six electrons in its valence shell. As a result, it is an electron-deficient species, also known as an electrophile.

An epoxide is a heterocyclic organic compound with an oxygen ring. The acid protonates the oxygen, which opens the ring and starts the process. A carbocation is now generated, which is quickly attacked by a water molecule.

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An epoxide is a heterocyclic organic compound with an oxygen ring. The acid protonates the oxygen, which opens the ring and starts the process.

What exactly is carbocation?

A carbocation is a molecule with three bonds and a positively charged carbon atom. To put it simply, they are essentially carbon cations. It was previously known as carbonium ion. A carbocation is any even-electron cation having a significant positive charge on the carbon atom.

An epoxide is a heterocyclic organic compound with an oxygen ring? The acid protonates the oxygen, which opens the ring and starts the process. A carbocation is now generated, which is quickly attacked by a water molecule.

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By increasing the temperature from 25°C to 50°C at constant pressure, the volume of the gas will increase from 100ml to approximately 200ml.

To increase the volume of a fixed amount of gas from 100ml to 200ml, you should follow the third option: 3) Increase the temperature from 25°C to 50°C at constant pressure.
Here's a step-by-step explanation:
Step 1: Convert the given temperatures to Kelvin.
- 25°C + 273.15 = 298.15K
- 50°C + 273.15 = 323.15K
Step 2: Apply Charles's Law, which states that at constant pressure, the volume of a gas is directly proportional to its temperature.
- V1/T1 = V2/T2
Step 3: Plug in the given values and solve for the new volume (V2).
- (100ml / 298.15K) = (V2 / 323.15K)
Step 4: Solve for V2.
- V2 = (100ml / 298.15K) * 323.15K
- V2 ≈ 200ml

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By increasing the temperature from 25°C to 50°C at constant pressure, the volume of the gas will increase from 100ml to approximately 200ml.

To increase the volume of a fixed amount of gas from 100ml to 200ml, you should follow the third option: 3) Increase the temperature from 25°C to 50°C at constant pressure.
Here's a step-by-step explanation:
Step 1: Convert the given temperatures to Kelvin.
- 25°C + 273.15 = 298.15K
- 50°C + 273.15 = 323.15K
Step 2: Apply Charles's Law, which states that at constant pressure, the volume of a gas is directly proportional to its temperature.
- V1/T1 = V2/T2
Step 3: Plug in the given values and solve for the new volume (V2).
- (100ml / 298.15K) = (V2 / 323.15K)
Step 4: Solve for V2.
- V2 = (100ml / 298.15K) * 323.15K
- V2 ≈ 200ml

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Therefore, the volume of the balloon when heated to 88°C is 2.432 L.

In the case of a gas, the volume is the amount of space that the gas occupies in a container. The volume of a gas can be affected by changes in pressure and temperature, as described by the ideal gas law. In this case, the volume is often expressed in terms of standard temperature and pressure (STP), which are defined as a temperature of 0°C and a pressure of 1 atmosphere (atm). In chemistry, volume is an important property for understanding the behavior of substances in chemical reactions. The volume of reactants and products can be used to determine the stoichiometry of a reaction, which is the relationship between the amounts of reactants and products in a chemical equation.

Here,

To solve this problem, we can use the ideal gas law, which states that:

PV = nRT

where P is the pressure of the gas, V is its volume, n is the number of moles of gas, R is the universal gas constant, and T is the temperature in Kelvin.

Since the pressure of the gas is assumed to remain constant, we can rearrange the ideal gas law to solve for V:

V1/T1 = V2/T2

where V1 is the initial volume of the balloon, T1 is the initial temperature in Kelvin (24°C = 297 K), V2 is the final volume we want to find, and T2 is the final temperature in Kelvin (88°C = 361 K).

Using this equation, we can plug in the given values and solve for V2:

V1/T1 = V2/T2

2.00 L / 297 K = V2 / 361 K

Multiplying both sides by 361 K, we get:

V2 = 2.00 L x (361 K / 297 K)

V2 = 2.00 L x 1.2162

V2 = 2.432 L

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Answer:

1.24

Explanation:

According to the concept of significant figures, rounding off to  3 significant figures gives 1.24.

Significant figures are used for establishment  of a number which is presented in the form of digits. These digits give a meaningful representation  to the numbers.

The significant figures are the significant digits which convey the meaning according to the accuracy. These provide precision to the numbers and hence are called as significant numbers.There are rules for counting significant figures which are as follows:

1)All non-zero digits are significant .

2)All zeroes which occur between non-zero digits are significant.

3)All zeroes to the left and right of  a non-zero digit are not significant.

4) All zeroes on right  of decimal are significant if a non-zero number follows them.

5)All zeroes on right side of non-zero digit are significant.

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answer: it is true because a hypothesis is something you think will happen during a experiment

explained: I took the test