Which molecule does not obey the Octate rule of valence electrons .

BeCl2

FeCl2

CuCl2

ZnCl2​

Answer:

Tin I thunk

Explanation:

I think

Answer:

sn = tin

se = 78.971 u (atomic mass)

s = 16 (atomic number)

Answer:

0.835 Kg

Explanation:

We'll begin by calculating the number of mole of oxygen that will fill 585 L tank at STP. This can be obtained as follow:

1 mole of oxygen (O2) occupies 22.4 L at STP.

Therefore, Xmol of oxygen will occupy 585 L tank at STP i.e

Xmol of oxygen = 585/22.4

Xmol of oxygen = 26.12 moles

Next, we shall determine the mass of 26.12 moles of oxygen. This can be obtained as follow:

Mole of O2 = 26.12 moles

Molar mass of O2 = 2 × 16 = 32 g/mol

Mass of O2 =?

Mole = mass /Molar mass

26.12 = mass of O2 /32

Cross multiply

Mass of O2 = 26.12 × 32

Mass of O2 = 835.84 g

Finally, we shall convert 835.84 g to Kg. This can be obtained as follow:

1000 g = 1 Kg

Therefore,

835.84 g = 835.84 g × 1 Kg / 1000 g

835.84 g = 0.835 Kg

Thus, 835.84 g is equivalent to 0.835 Kg.

Therefore, the mass of oxygen needed to fill the 585 L tank at STP is 0.835 Kg

At 2861 degree Celsius the iron begins to boil. At 1,538 °C the substance begins to melt.

The melting point is the point at which the liquid and solid forms of a solid can exist in equilibrium. It can also be defined as the point at which a solid changes into a liquid under normal atmospheric pressure.

The equilibrium point at which water vapor, liquid water, and solid ice can exist in equilibrium is the only point at which the pressure and temperature of water vapor are the same. The equilibrium point of water vapor is the point at which the partial vapor pressure is the same as that of liquid water at the exact temperature of 273.1600 K.

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Answer:

\(5.64*10^{14}\)m

Explanation:

C = Fλ

C: Speed of light = \(3*10^8\)m/s

f: Frequency (Hz)

λ: Wavelength (m)

Rearrange formula for wavelength:

C/F = λ

\(\frac{3*10^8}{532*10^{-9}} =5.64*10^{14}m\)

The piece of evidence that best identifies the type of reaction as nuclear or chemical is: Chemical, because a new substance is formed. Option 4

In this scenario, the observation that a new substance is formed is a key characteristic of a chemical reaction. Chemical reactions involve the rearrangement of atoms to form different substances with distinct properties. The formation of a new substance indicates a chemical change has occurred.

The other pieces of evidence listed do not necessarily point to a nuclear reaction:

Chemical, because energy is released during the reaction: Energy can be released in both nuclear and chemical reactions, so this observation alone is not sufficient to determine the type of reaction.

Nuclear, because energy is released during the reaction: While energy can be released in nuclear reactions, it is not exclusive to them. Chemical reactions can also release energy, such as in exothermic reactions.

Nuclear, because the mass decreased after the reaction: This observation suggests a change in mass, which could be indicative of a nuclear reaction. However, it is important to consider that chemical reactions can also involve changes in mass, such as the formation of gases or dissolution of a solid.

Overall, the most conclusive evidence to identify the type of reaction is the formation of a new substance, which aligns with a chemical reaction.

Option 4

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The gas that has a volume of 752 mL at 1.98 atm and 62°C is most likely NO₂ (option D).

The volume of a sample of gas can be calculated using the following formula:

PV = nRT

Where;

According to this question, the volume of a sample of gas (2.49 g) was 752 mL at 1.98 atm and 62°C. The number of moles is as follows:

1.98 × 0.752 = n × 0.0821 × 335

1.489 = 27.5n

n = 0.054mol

molar mass of the gas = 2.49g ÷ 0.054mol = 45.99g/mol

The gaseous substance with the molar mass of 45.99g/mol is NO₂.

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If there had been five exons and four introns, the result would have been. The four introns will be forced to loop in order to bring out the adjacent exons together.

An exon is any part of a gene that will be included in the final mature RNA produced by that gene after introns are removed via RNA splicing. Exons refer to both the DNA sequence within a gene and the corresponding RNA transcript sequence. In RNA splicing, introns are removed and exons are covalently joined to form mature RNA. The genome is made up of the entire set of genes for a species, and the exome is made up of the entire set of exons."The concept of the cistron must be replaced by that of a transcription unit," wrote American biochemist Walter Gilbert in 1978.

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Answer:

The answer is D) 51.2%

Explanation:

5.12g of 10.00g of the substance is water:

percentage of water= 5.12 x 10.00 =51.2%

Answer:

b

Explanation:

Answer:

Question

Explanation:

Identification of problem is the first scientific method. This is overtaken by asking questions

Prior to writing the chemical formula of magnesium chloride, a question which any student will need to ask is: A.  What are the oxidation numbers of each atom?

A chemical formula can be defined as a scientific notation that is used to show (represent) the type and total number of atoms that constitute a particular chemical molecule or compound, by using the oxidation number, chemical symbols and subscripts.

Hence, a student would need to know the oxidation numbers of each atom when magnesium chloride is formed after a chemical reaction.

In Chemistry, an oxidation number represents the number of electrons gained or lost by an atom of a chemical element during a chemical reaction.

In conclusion, when magnesium chloride is formed, a question which the student will need to ask prior to writing the chemical formula is "what are the oxidation numbers of each atom?"

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Answer:

The metal atoms become positive ions and the non-metal atoms become negative ions. There is a strong electrostatic force of attraction between these oppositely charged ions – this is called an ionic bond.

Explanation:

Answer

3:1

Procedure

The electron configuration can be used to predict whether an atom will form an anion or a cation, and you can often predict the charge of the resulting ion. Elements will try to satisfy the octet rule, to reach a stable electron configuration.

Sodium has 1 valence electron in the shell 3 will need to lose 1 electron to satisfy the octet rule

Phosphorus has 5 electrons in the valence shell so it will be easier for phosphorus to gain 3 electrons than to lose 5 electrons to satisfy the octet rule

Based on the previous the ratio will be

Cationic +1

Anionic -3

Ratio 3:1

This element is in group 1.

According to the octet rule, this element would be expected to form an ion with a charge of +1.

If X is in period 5, the ion formed has the same electron configuration as the noble gas Krypton

The symbol for the ion is Rb⁺

Electronic configuration refers to the arrangement of electrons in the orbitals of an atom or molecule, indicating the energy level of the electrons, the number of electrons in each energy level, and the number of electrons in each orbital.

Considering the given element:

It has one valence electron, hence it is in group 1. Group 1 elements form ions with a charge of +1.

Losing one electron will give the ion the same electron configuration as Kyrton since it is the noble gas in Period 4.

The element is rubidium and the ion is Rb⁺.

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A brewed black tea generally has 81.30 milligrams of TA per 100 mL of water (which is to say it is at equilibrium). If a tea bag is steeped in 150. mL of water, 54.2 is the concentration of TA at equilibrium.

A substance's concentration is the amount of solute present in a given amount of solution. Molarity is the number of moles of solute in one liter of solution and is used to express concentrations.

Given:

M₁ = 81.30 milligrams

M₂ = ?

V₁ = 100ml

V₂ = 150ml

M₁V₁ = M₂V₂

By substituting given values in this equation and we get,

81.30 × 100 = M₂ × 150

M₂ = 81.30 × 100 / 150

= 54.2

Thus,  54.2 is the concentration of TA at equilibrium.

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Answer:B. CO2

Explanation: It is B because it has both letters capitalized if it  is a compound and it only has 1 letter capitalized if it is an element.

The equation that relates A and W, considering the desired 15% acetic acid concentration, is 3W = 2.55M.

The equation A = (3/17)W represents the relationship between the mass of acetic acid (A) and the mass of water (W) in the mixture. It states that the mass of acetic acid is equal to three seventeenths (3/17) of the mass of water.

Since the company wants the acetic acid to be 15% of the total mass of the mixture, we can set up another equation to represent this requirement. Let M be the total mass of the mixture. The mass of acetic acid (A) is 15% of the total mass, so we have A = 0.15M.

Now we can substitute A in terms of W from the first equation into the second equation: (3/17)W = 0.15M. We can simplify this equation by multiplying both sides by 17 to get 3W = 2.55M.

This equation allows the company to calculate the mass of water (W) required for a given mass of acetic acid (A) to maintain the desired concentration in the mixture.

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Answer:

Ammonium chloride

Explanation:

because is a salt which is highly soluble in water than potassium

The amount, in grams, of hydrofluoric acid that will be formed when 173.63 grams of hydrogen reacts with 173,63 grams of fluorine would be 182.8 grams.

The balanced equation of the reaction is written as:

\(H_2 + F_2 -- > 2HF\)

According to the equation, the mole ratio of hydrogen and fluorine that react to produce hydrofluoric acid is 1:1.

Recall that: mole of substance = mass of the substance/molar mass

Molar mass of \(H_2\) = 1x2 = 2 g/mol

Molar mass of \(F_2\) = 19x2 = 38 g/mol

Mole of 173.63 grams  \(H_2\) = 173.63/2

                                             = 86.82 moles

Mole of 173.63 grams  \(F_2\)  = 173.63/38

                                        = 4.57 moles.

Considering the mole ratio of the two reactants, it appears that fluorine is limited in availability and will, therefore, determine the amount of hydrofluoric acid that will be produced.

Mole ratio of fluorine to hydrofluoric acid = 1:2.

Equivalent mole of hydrofluoric acid = 4.57 x 2 = 9.14 moles.

Mass of 9.14 moles HF = 9.14 x 20

                                     = 182.8 grams

Thus, the amount of hydrofluoric acid formed from the reaction is 182.8 grams.

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Exothermic reactions like this one are an example. You can see that during the aforementioned reaction, heat is absorbed, lowering the reaction mixture's temperature, which causes the reaction flask to feel cold.

Chemical processes known as exothermic reactions result in heat production. We described the heat flow q being negative when heat is emitted from the system to its surroundings in Section II-B of Volume 3. Therefore, the H of reaction for exothermic processes is negative.

Endothermic chemical reactions are those that ingest (or utilize) energy overall. When bonds between the reactants and products are broken during endothermic processes, more energy is taken in than is produced.

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There are approximately 6.022 × 10^23 atoms in 12 grams of Carbon-12 (12C).

The number of atoms in a given amount of a substance can be calculated using Avogadro's number, which represents the number of atoms or molecules in one mole of a substance. Avogadro's number is approximately 6.022 × 10^23.

Carbon-12 is a specific isotope of carbon, with an atomic mass of 12 atomic mass units (amu). One mole of Carbon-12 has a mass of 12 grams. Since one mole of any substance contains Avogadro's number of particles, in the case of Carbon-12, it contains 6.022 × 10^23 atoms.

Therefore, if we have 12 grams of Carbon-12, which is equal to one mole, we can conclude that there are approximately 6.022 × 10^23 atoms in this amount of Carbon-12.

In summary, 12 grams of Carbon-12 contains approximately 6.022 × 10^23 atoms. Avogadro's number allows us to relate the mass of a substance to the number of atoms or molecules it contains, providing a fundamental concept in chemistry and enabling us to quantify and understand the microscopic world of atoms and molecules.

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Answer:

I'm not an expert at this, but I assume its mercury.

Answer:

The air warms up, causing it to become lighter than the cold air outside of it.

Answer:

The three primary colors used when mixing dyes or paints are red, yellow, and blue. Other colors are often a mixture of these three colors. Try running a chromatography test again with non-primary-color markers, like purple, brown, and orange.

Explanation:

As a result, the ideal gas law is applied, and the pressure of the gas in the container is 1.44 atm.

The Kelvin temperature and hence the volume are going to be in direct proportion when the pressure on a sample of a dry gas is held constant, according to the definition of the Charles Law Formula. PV = k is the law's equation, and k might be a constant.

This issue can be resolved by applying the ideal gas law:

PV = nR

T = -52 °C + 273.15 = 221.15 K

n = 0.642 mol

V = 8.6 L

T = 221.15 K

\(R = 0.0821 L·atm/mol·K (gas constant for ideal gases)\)

PV = nRT

P = nRT/V

P = (0.642 mol)(0.0821 L·atm/mol·K)(221.15 K)/(8.6 L)

P = 1.44 atm

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Answer:

Energy cannot be converted from one form to another.

Answer:

false

Explanation:

Fossils fuels are actually polluting the atmosphere therefore, it can not be a clean-burning fuel.

The distinctive characteristics of carbohydrates are due to the different arrangements of oxygen, hydrogen, and positive ions.

Sugars make up carbohydrates, also known as carbs. Carbohydrates are among the three primary nutrients included in meals and beverages, along with lipids and lipids. To produce glucose, the body breaks down carbohydrates. Your body uses glucose, commonly known as blood glucose or sugar, as its primary source of energy because of its cells, tissues, and organ systems.

Any of the three carbohydrates, starch, and fiber—which are sometimes referred to as "simple carbs" or "complex carbs"—has a place in your diet. A simple carbohydrate, sugar is composed from mono- and disaccharides. Complex carbohydrates called polysaccharides contain fiber.

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Answer:

im not myself with nitro gone

Explanation: