If i have 82 ml of a solution with a molarity of 5.3 m nabr, how many ml of a 1.1 m nabr solution can i prepare? 395.1 ml 0.07 ml 17.0 ml 478.1 ml

The statement "the reaction between R and P appeared to stop when no further changes were observed" suggests that the observable changes in the reaction have ceased. However, chemical reactions may not actually "stop" completely even when no further changes are visibly observed.

Chemical reactions occur at the molecular level, where individual molecules collide and undergo chemical transformations. Even if the macroscopic changes or observable properties appear to have reached a steady state, the molecular-level reactions can continue at an equilibrium. In other words, while the overall concentrations or properties of the reactants and products may remain constant, the individual molecules are still undergoing constant microscopic fluctuations and interconversions.

In such cases, the reaction is considered to be in a dynamic equilibrium, where the forward and reverse reactions occur at equal rates, resulting in no net change in the macroscopic observable properties. This state of equilibrium does not imply that the reaction has completely stopped but rather that the rates of the forward and reverse reactions have balanced out.

Therefore, even when no further changes are observed at the macroscopic level, chemical reactions can continue at the molecular level in a dynamic equilibrium state.

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The wavelength of white light is different them the wavelength of colored light thus the color of the mirror affect the way if reflect the light.

Wavelength can be defined as the distance in the line of advance of a wave from any one point to the next point from corresponding phase.

It can also be defined as the distance between the corresponding waves i.e. crests and troughs.  

The wavelength of light will decreases when the wave interact with the colored particle.

Thus, the wavelength of white light is different them the wavelength of colored light thus the color of the mirror affect the way if reflect the light.

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A molecule is a group of two or more atoms held together by chemical bonds. Molecules are essential to understanding the behavior of matter and the chemical processes that underlie many biological and physical phenomena.

A molecule is termed as the group of two or more atoms held together by chemical bonds. It is the smallest unit of a chemical compound which retains the chemical properties of that compound. Molecules can be made up of atoms of the same element, as in diatomic molecules like oxygen (O₂) and hydrogen (H₂), or they can be composed of different elements, such as water (H₂O) and carbon dioxide (CO₂).

Molecules are important for several reasons; They are the building blocks of all matter; Molecules make up everything we see and touch, from the air we breathe to the food we eat.

They determine the properties of substances; The properties of a substance are determined by the arrangement of its constituent molecules. For example, the properties of water are determined by the arrangement of its H₂O molecules.

They participate in chemical reactions; Molecules are involved in chemical reactions, where they can be broken down into their constituent atoms or combined with other molecules to form new compounds.

They play a role in energy transfer: Molecules like ATP (adenosine triphosphate) are involved in energy transfer within living cells.

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Answer:

d) burning fossil fuels

Explanation:

We humans burn fossil fuels the most

The final temperature of the mixture when no heat loss to the surroundings is equal to 69.57 °C

The specific heat capacity can be defined as the amount of heat required to increase the temperature in 1 unit of substance by 1° Celcius.

The specific heat capacity can be expressed in the form of the mentioned formula below:

Q = mSΔT

The specific heat capacity of the water, S = 4.184 J/g°C

The heat lost by water = heat gained by the ice

Heat lost by water = heat gained by the ice + heat increased by the water

m₁S₁ (T₂ - T₁) = m₂L + m₂S₂ (T₂ - T₁)

103.5 × 4.18 × (73- T) = 13.1  × (2.03) + 5 × 4.18 × (T-0)

31582 - 432.63 T = 26.59 + 20.9 T

453.53 T = 31555

T = 69.57 °C

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Answer:

2.059524x10^26 if im not wrong

Explanation:

avogadro's number is 6.022x10^23

Answer:

Plugging in the numbers we find the average force to be Favg=18,436 N, which is equivalent to 4124 lbs of force. The impulse delivered by this force is the product of the average force the the contact time, resulting in an impulse of 12.91 Ns.

Answer:

the force multiplied by the time the objects are in contact

Explanation:

took the quiz

The best option for the immediate precursor to 5,5-dimethylhexanoic acid is 5,5-dimethylhexanoyl chloride.

1. Start with 4,4-dimethylpentanoic acid.
2. Perform an oxidative cleavage using a suitable oxidizing agent like potassium permanganate (KMnO4) to form 4,4-dimethylpentanal.
3. Perform a Wittig reaction on 4,4-dimethylpentanal with methoxymethyltriphenylphosphonium chloride (MMTPP-Cl) to form 5,5-dimethylhexene.
4. Hydrolyze 5,5-dimethylhexene with a strong acid like hydrochloric acid (HCl) to form 5,5-dimethylhexanoic acid.

Summary: In order to synthesize 5,5-dimethylhexanoic acid from 4,4-dimethylpentanoic acid, you need to go through a series of reactions, including oxidative cleavage, Wittig reaction, and hydrolysis. The immediate precursor to 5,5-dimethylhexanoic acid is 5,5-dimethylhexanoyl chloride.

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Ethane is the limiting reactant, so no mass of ethane will be left over by the chemical reaction. All the mass will react, the 8.1 grams of ethane.

How much grams of ethane will react, explain.

First of all, we need to determine the reaction and the limiting reactant to work with the stoichiometry.

The equation is: 2C₂H₆ + 7O₂ →  4CO₂ + 6H₂O

We define the moles of the reactants:

8.12 g / 30 g/mol = 0.270 moles of ethane

13g / 32 g/mol = 0.406 moles of oxygen

To determine the limiting reactant, we start with oxygen:

7 moles of O₂ can react with 2 moles of ethane

Then, 0.406 moles of O₂ will react with (0.406 . 2) / 7= 0.116 moles of ethane.

We do not have enough ethane, just only 0.07 moles to react.

Ethane is the limiting reactant, so no mass of ethane will be left over by the chemical reaction. All the mass will react, the 8.12grams of ethane.

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The value of the specific rate constant, k, in the gas phase reaction A+B ® C would be affected by increasing the temperature. Therefore, the correct answer is option (a) "increasing the temperature".

The specific rate constant, k, is a proportionality constant that relates the rate of a reaction to the concentrations of the reactants. It is a measure of the intrinsic reactivity of the reactants and is affected by factors such as temperature and the presence of a catalyst. Changing the concentration of A or B would not affect the value of k, as it is a constant for a given reaction at a given temperature.

However, increasing the temperature would increase the value of k, as the reaction rate generally increases with temperature. This is because an increase in temperature increases the kinetic energy of the molecules, leading to more frequent and energetic collisions between the reactants, and therefore a faster reaction rate.

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False. The statement that the species BF3 does not exist because its central boron (B) atom has only 6 valence electrons .

The existence and stability of chemical species are determined by the electron configuration and bonding of the atoms involved. In the case of BF3 (boron trifluoride), boron is the central atom.

Boron, located in Group 13 of the periodic table, has an atomic number of 5. As a result, it has 5 electrons in its neutral state. However, when boron forms chemical compounds, it can utilize vacant orbitals to accommodate additional electrons.

In the case of BF3, boron forms three covalent bonds with three fluorine (F) atoms, resulting in a total of 8 electrons around the boron atom. This satisfies the octet rule, which states that atoms tend to gain, lose, or share electrons in order to achieve a stable electron configuration with 8 valence electrons.

Therefore, BF3 does exist, and its central boron atom accommodates 8 valence electrons, rather than just 6.

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False.

Radiation itself does not typically have a green glow, intense heat, crackling sound, or ammonia smell. These descriptions do not accurately represent the properties of radiation.

The emission of energy in the form of particles or electromagnetic waves is referred to as radiation. Our senses cannot immediately notice it. Radiation is measured and detected using specialized apparatus and detectors.

Alpha particles, beta particles, gamma rays, and X-rays are a few examples of different forms of radiation that have unique characteristics and may be identified with the right tools. For instance, ionizing radiation is typically detected using Geiger-Muller counters or scintillation detectors, whereas radiation exposure is measured using dosimeters.

For precise radiation risk identification and protection, it's crucial to rely on the right detection tools and follow safety procedures.

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Answer:

El ciclo del carbono es un ciclo biogeoquímico por el cual el carbono se intercambia entre la biosfera, la litosfera, la hidrosfera y la atmósfera de la Tierra. ... Este ciclo puede ser dividido en dos: el ciclo lento o geológico y el ciclo rápido o biológico.

Explanation:

The given options, option D) with 2 dots on N and 6 dots on O would be the correct electron dot structure for OCN- with a formal charge of -1 on the most electronegative atom (oxygen).

To determine the electron dot structure for OCN- with a formal charge of -1 on the most electronegative atom, we need to calculate the formal charges for each atom in the molecule.

The electron dot structure for OCN- is:

O       C       N

. .      .       .

: O : . : C : : N :

' ' ' '

: '

. '

In this structure, oxygen (O) is the most electronegative atom, so we want it to have a formal charge of -1.

To determine the electron dot structure with a formal charge of -1 on the most electronegative atom (the atom with the highest electronegativity), we need to compare the electronegativities of the atoms in the OCN- molecule.

In the OCN- molecule, we have oxygen (O), carbon (C), and nitrogen (N). Oxygen is the most electronegative atom, followed by nitrogen and then carbon.

Looking at the given options:

A) 6 dots on N & 2 on O

B) 6 dots on N & 2 on C

C) 4 dots on N & 4 on O

D) 2 dots on N & 6 on O

We want to maximize the number of dots on the oxygen atom (O) and minimize the number of dots on the nitrogen atom (N) to give oxygen a formal charge of -1. The correct option would be the one with the most dots on oxygen and the fewest dots on nitrogen.

Among the given options, option D) with 2 dots on N and 6 dots on O would be the correct electron dot structure for OCN- with a formal charge of -1 on the most electronegative atom (oxygen).

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Answer:

A . 6.3 In a healthy pond, the temperature is 16°C (61°F). What is the most likely pH of this pond

In a healthy pond, the temperature is 16°C (61°F). 6.3 is the most likely pH of this pond.

A measure of the acidity or basicity of a substance or solution. The pH scale ranges from 0 to 14. A pH value of 7 is neutral on this scale, indicating that it is neither acidic nor basic.

A pH value less than 7 indicates that it is more acidic, while a pH value greater than 7 indicates that it is more basic.

"Potential of Hydrogen" is the full form of pH. The negative logarithm of H+ ion concentration is known as pH. As a result, the meaning of the name pH is explained as hydrogen strength or power.

Thus, In a healthy pond, the temperature is 16°C (61°F). 6.3 is the most likely pH of this pond, so the pond is more acidic in nature.

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Answer:

(Physical or Chemical) properties of a substance can easily be observed. … (Physical or Chemical) properties can be used to identify substances. physical property. Oxygen is odorless and colorless.

Explanation:

Glycoproteins are proteins to which carbohydrates have been covalently attached. The amino acid R groups that serve as sites for linkages in glycoproteins include serine, threonine and asparagine.

Additionally, tyrosine, which contains a phenolic hydroxyl group, can also serve as a site for the attachment of carbohydrate moieties to proteins. Glycoproteins are a type of protein that has one or more carbohydrates covalently attached to it.

They play a vital role in many cellular functions, such as cell signaling and recognition. The amino acid R groups that serve as sites for linkages in glycoproteins are important in determining the function of the protein.

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Answer:

A

Explanation:

1g=1000mg

1g= 1000 000 micro gram

1g= 1000 000 000 nm = 10^9

Answer: The correct answer is A. 1 x 10^9.

Explanation:

Valence electrons of Ne, Ar are the same = 8

because they are in VIIIA or inert gas

A student is conducting a laboratory experiment with sulfur hexafluoride with a molar mass of 146.07 g/mole. The completed chart would be: Compound | SF6, Mass | 235.7 g, Moles | 1.61 moles, Particles | 9.72 x 10²³ particles.

To calculate the number of moles and the number of particles, we need to use the following formulas:

1 mole = mass (g) / molar mass (g/mole)

Number of particles (Avogadro's number) = number of moles x 6.022 x 10²³  particles/mole

Given the mass of SF6 as 235.7 g, we can calculate the number of moles as follows:

number of moles = mass (g) / molar mass (g/mole) = 1.61 moles

And then, we can calculate the number of particles as follows:

number of particles = number of moles x 6.022 x 10²³  particles/mole = 1.61 moles x 6.022 x 10²³  particles/mole = 9.72 x 10²³  particles

Therefore, the completed chart would be:

Compound | SF6

Mass | 235.7 g

Moles | 1.61 moles

Particles | 9.72 x 10²³  particles

A mole is the unit of measurement used in chemistry to express amounts of a chemical substance. One mole is defined as the amount of a substance that contains Avogadro's number of units, where Avogadro's number is defined as 6.02214076 x 10²³ particles per mole. This number of particles can be atoms, molecules, ions, or electrons, depending on the substance.

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Answer: when a solid is heated and turns to liquid. The particles in a solid gain enough energy to overcome the bonding forces holding them firmly in place

Typically, during melting, the particles start to move about, staying close to their neighbouring particles, then move more freely.

Answer:

2,909 M

Explanation:

molair mass is of.ethylene is 26,04 g/mol

first you need to calculate how much mL 3 kg is. You can do this by using the density of ethylene: 1,1 g/mL.

3000 g x 1.1 = 3300 mL = 3,3 L

Next you need to calculate the amount of moles:

250 g / 26,04 g/mol = 9,60 mol

Now you can calculate the molarity:

9,6/3.3 = 2,909 M

I don't know the answer for the second question. I'm sorry.

Answer: An unhealthy diet can increase the risk of some cancers. Overweight and obesity are associated with at least 13 types of cancer, including endometrial (uterine) cancer, breast cancer in postmenopausal women, and colorectal cancer. These cancers make up 40% of all cancers diagnosed.

Answer:

Chemistry reactions are used in art for the following processes;

1) Analog photography

The photographic paper used in analog photography react when exposed to light such that the image on the film stains the photopaper

A series of chemicals are further used to develop the images now carried on the paper and water is used to rinse of the chemicals after the other chemical processes are complete

The photopaper, now bearing the developed photo is hung for it to be dried

2) Paint used for painting consists of several chemicals, including, minerals that serve as pigment, oils that serve as carrying agent, a thinner to prevent the paint from turning to solid

An artist therefore combines different chemicals for a given paint task

3) In the sculpting process

An original sculpture is produced by the artist with the aid of clay or plaster, from the original sculpture, on which wax coatings and chemicals are used to make a replica mold.

Copies of the sculpture can then be made by pouring material into the mold

Explanation:

Explanation:

V1/T1 = V2/T2      T  must be in Kelvin

12.78 / (-50 + 273.15)  =  V2 / ( 28+ 273.15)

V2 = 17.25 L

The cοncentratiοn οf the sοlutiοn οf beta-carοtene can be calculated by dividing the absοrbance at 490 nm by 1.36 x 10⁵ M⁻¹cm⁻¹.

Tο calculate the cοncentratiοn οf a sοlutiοn οf beta-carοtene, we can use the Beer-Lambert Law, which relates the absοrbance οf a sοlutiοn tο its cοncentratiοn.

The Beer-Lambert Law is given by:

A = ε * c * l

where A is the absοrbance, ε is the mοlar absοrptivity, c is the cοncentratiοn, and l is the path length.

In this case, we are given the mοlar absοrptivity (ε) οf beta-carοtene at 490 nm as 1.36 x 10⁵ M⁻¹ cm⁻¹ * 1 cm, and we want tο determine the cοncentratiοn (c).

Rearranging the equatiοn, we have:

c = A / (ε * l)

Substituting the values:

A = absοrbance at 490 nm

Let's assume a path length (l) οf 1 cm.

c = A / (1.36 x 10⁵ M⁻¹ cm⁻¹ * 1 cm)

Therefοre, the cοncentratiοn οf the sοlutiοn οf beta-carοtene can be calculated by dividing the absοrbance at 490 nm by 1.36 x 10⁵ M⁻¹cm⁻¹.

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Answer:

3+

Explanation:

Ignore neutrons.

Protons are positive and electrons are negative. To find a charge, it is protons minus electrons. In this atom, there are 21 protons and 18 electrons

21-18=3

Positive 3

Ions can be made by single element or covalently bonded group of elements. The covalently bonded group of elements is called polyatomic ions or polyatomic atoms. The correct option option B.

Any species that contain charge whether it is positive charge or negative charge is called ions. The example of polyatomic ions are sulfate, phosphate, nitrate etc.

Cation is the species that loose electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral.

Protons are positive and electrons are negative. To find a charge, it is protons minus electrons. In this atom, there are 21 protons and 18 electrons, 21-18=+3

Therefore the charge on an ion is +3.

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