What group on the periodic table is more reactive 5 or 6 and why?

Answer:

1.Gamma Rays

2. Infrared

3. Radio Waves

Explanation:

Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.

Answer:

gamma rays

infrared

radio waves

Explanation:

The balanced chemical equation for the reaction is 2K + Cl2 → 2KCl.

The chemical equation you provided is an example of a single displacement or redox reaction, where potassium (K) reacts with chlorine (Cl2) to form potassium chloride (KCl). In this reaction, potassium loses an electron (oxidation) and chlorine gains an electron (reduction).

The coefficient of 2 in front of KCl indicates that two potassium atoms react with one chlorine molecule to form two potassium chloride compounds.

In this reaction, each potassium atom loses one electron to achieve a stable electron configuration, forming K+ ions. On the other hand, each chlorine molecule gains one electron to fill its valence shell, forming Cl- ions.

The reaction takes place due to the difference in electronegativity between potassium and chlorine. Chlorine is highly electronegative compared to potassium, which leads to the transfer of electrons from potassium to chlorine.

The resulting product, potassium chloride (KCl), is an ionic compound composed of positively charged potassium ions (K+) and negatively charged chloride ions (Cl-).

It is important to note that chemical reactions must be balanced, meaning that the number of atoms of each element must be the same on both sides of the equation. In this case, the equation is balanced with two potassium atoms, two chloride atoms, and four total charges on both sides.

Overall, the reaction between potassium and chlorine to form potassium chloride follows the principle of electron transfer and results in the formation of an ionic compound.

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The name for a positive ion is a cation.

the de Broglie wavelength of the electron moving at a velocity of 3. 0 × 107 m/s is 2.4×10∧-11nm

lambda = h/mv

The de Broglie wavelength is defined as follows: lambda = h/mv, wherein the greek letter lambda represents the wavelength, h is Planck's consistent, m is the particle's mass and v is its pace. One may also explicit mv as the particle's momentum

according to wave-particle duality, the De Broglie wavelength is a wavelength manifested in all the gadgets in quantum mechanics which determines the chance density of locating the item at a given factor of the configuration area. The de Broglie wavelength of a particle is inversely proportional to its momentum

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As per the given reaction one mole of magnesium hydroxide reacts with 2 moles of potassium metal to give one mole of Mg. Therefore, 12 moles of potassium reacts to give 6 moles of Mg metal.

In a displacement reaction, one element or group is displaced from the reactant by the other reactant. The given reaction is an example of single displacement reaction.

As per the balanced chemical equation of the reaction, 1 mole of magnesium hydroxide reacts with 2 moles potassium metal to form one mole of Mg metal and 2 moles of potassium hydroxide.

Here, 12 moles of potassium is taken. Then, the number of moles of Mg metal formed is just half the number of moles of K. That is 6 moles of magnesium metal.

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The reaction related to your question is given below:

Mg(OH)₂ + 2K ⇒2KOH + Mg

Answer:

Cohesive forces cause the water molecules to stick together with a lot of elasticity, allowing the water to function very much like a rubber into a material like a glass pitcher.

Intermolecular forces such as dipole-dipole forces, London dispersion forces exist between molecules and these depend on strength of electronegativity of molecule. Therefore, cohesive forces cause water molecules to stick to a material like a glass pitcher​.

Intermolecular forces of attraction is force of attraction that make two molecule come closer. Intermolecular forces of attraction is directly proportional to the electronegativity of the molecule.

Cohesive forces cause the water molecules to stick together with a lot of elasticity, allowing the water to function very much like a rubber into a material like a glass pitcher.

Therefore, cohesive forces cause water molecules to stick to a material like a glass pitcher​.

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Answer:

where the main questions of these assmesnt

Explanation:

The cultures of prehistoric humans are primarily known through the excavation of stone tools and other durable artifacts, such as the Oldowan and Acheulian tool traditions.

Stone tools and imperishable artifacts serve as key archaeological evidence for understanding prehistoric cultures. Through meticulous excavation and analysis, archaeologists have been able to piece together the lifestyles, technological advancements, and social behaviors of early human societies. The term "paleolithic" refers to the Old Stone Age, a time when humans relied on stone tools as their primary implements.

The Oldowan tool tradition is considered the earliest stone tool industry, dating back around 2.6 million years ago. It is characterized by simple tools, such as choppers and scrapers, which were crafted by flaking off pieces from larger stones. These tools were primarily used for basic activities like butchering and processing animal carcasses.

Later, the Acheulian tool tradition emerged around 1.76 million years ago, representing an advancement in stone tool technology. Acheulian tools, such as handaxes and cleavers, were more refined and standardized, showcasing an increased level of sophistication in tool-making techniques. These tools served a wide range of purposes, including hunting, woodworking, and shaping raw materials.

By studying the Oldowan and Acheulian tool traditions, researchers gain valuable insights into the cognitive abilities, cultural development, and technological progress of early humans. The examination of these artifacts provides evidence of their adaptability, problem-solving skills, and the gradual refinement of their tool-making techniques over time.

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The concentration of hydrogen fluoride (HF) after the addition of 9.00 mL of 0.0100 M HCl to 25.0 mL of the buffer solution is 0.0900 M (option b).

To determine the concentration of hydrogen fluoride (HF) after adding 9.00 mL of 0.0100 M HCl to 25.0 mL of the buffer solution, we need to consider the effect of the added acid on the buffer system.

First, let's calculate the moles of HF present in the buffer solution before the addition of HCl:

moles of HF = (0.126 M HF) × (0.0250 L)

= 0.00315 mol HF

Now, let's calculate the moles of HCl added to the buffer solution:

moles of HCl = (0.0100 M HCl) × (0.00900 L)

= 0.0000900 mol HCl

Since HF and HCl can react in an acid-base neutralization reaction, we need to determine which species is present in excess and which will be consumed.

Comparing the moles of HF and HCl, we can see that HCl is in excess, as the moles of HCl (0.0000900 mol) are less than the moles of HF (0.00315 mol).

To calculate the moles of HF remaining after the reaction with HCl, we subtract the moles of HCl from the moles of HF:

moles of HF remaining = moles of HF - moles of HCl

= 0.00315 mol - 0.0000900 mol

= 0.00306 mol

Now, let's calculate the concentration of HF in the final solution:

concentration of HF = moles of HF remaining / total volume of solution

= 0.00306 mol / (25.0 mL + 9.00 mL)

= 0.00306 mol / 0.0340 L

= 0.090 m

Therefore, the concentration of hydrogen fluoride (HF) after the addition of 9.00 mL of 0.0100 M HCl to 25.0 mL of the buffer solution is 0.0900 M (option b).

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The substance heats up relatively quickly means less energy needed for the rise in temperature. Therefore, the substance is having low specific heat.

Of all liquids, water has the highest specific heat capacity. The amount of heat that one gram of a substance needs either absorb or lose in order to change its temperature by one degree Celsius is known as specific heat. A compound with "low specific heat" will raise its temperature considerably more quickly than a compound with "high specific heat." J/kg C or J/g C are the units for specific heat. While substances with (high or low) particular heats will be more challenging to heat up, substances with (high or low) specific heats will heat up readily.

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Answer:

there is 7 periods and 18 groups

Explanation:

Answer:

1)Around 450 B.C., the Greek philosopher Democritus introduced the idea of the atom.

2)All matter is made of atoms, Atoms are indivisible and indestructible.Compounds are formed by a combination of two or more different kinds of atoms, A chemical reaction is a rearrangement of atoms.

3)B

Explanation:

The advantage of making a solvent unblocking lightly nonpolar is to increase the solubility of polar and ionic compounds.

The solubility of a solute in a solvent is largely determined by the relative polarity of the solute and solvent. Polar solvents dissolve polar solutes, while nonpolar solvents dissolve nonpolar solutes. Making a solvent unblock lightly nonpolar increases its ability to dissolve polar and ionic compounds by reducing the difference in polarity between the solvent and solute.

This allows polar and ionic compounds to be dissolved in a nonpolar solvent, which can be useful in various applications, such as chromatography and chemical reactions.

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7) In the reaction Ni + F2 --> NiF2, Ni is being oxidized (loses electrons) and F2 is being reduced (gains electrons). The reducing agent is Ni, as it provides electrons for the reduction, and the oxidizing agent is F2, as it accepts electrons during the oxidation.
8) In the reaction Fe(NO3)2 + Al --> Fe + Al(NO3)3, Al is being oxidized (loses electrons) and Fe2+ from Fe(NO3)2 is being reduced (gains electrons). The reducing agent is Al, and the oxidizing agent is Fe2+.
19) In the reaction Li + H2O --> LiOH + H2, Li is being oxidized (loses electrons) and H2O is being reduced (gains electrons). The reducing agent is Li, and the oxidizing agent is H2O.

In redox reactions, oxidation and reduction occur simultaneously. The species being oxidized loses electrons, while the species being reduced gains electrons. The oxidizing agent causes oxidation by accepting electrons, while the reducing agent causes reduction by donating electrons.
In reaction 7, Ni is being oxidized as it loses electrons and F2 is being reduced as it gains electrons. F2 is the oxidizing agent as it causes oxidation by accepting electrons, while Ni is the reducing agent as it causes reduction by donating electrons.
In reaction 8, Fe(NO3)2 is being reduced as it gains electrons and Al is being oxidized as it loses electrons. Al is the oxidizing agent as it causes oxidation by accepting electrons, while Fe(NO3)2 is the reducing agent as it causes reduction by donating electrons.
In reaction 19, Li is being oxidized as it loses electrons and H2O is being reduced as it gains electrons. H2O is the oxidizing agent as it causes oxidation by accepting electrons, while Li is the reducing agent as it causes reduction by donating electrons.
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Answer:

2 oxygen atoms make oxygen gas

A molecule of oxygen gas is composed of two oxygen atoms chemically bonded together. The symbol for oxygen is "O," and the atomic number is 8, indicating that each oxygen atom has 8 protons in its nucleus.

A covalent bond is a type of chemical bond that occurs between two atoms when they share one or more pairs of electrons. It is a strong bond that holds atoms together to form molecules.

In a covalent bond, atoms share electrons in order to achieve a more stable electron configuration, typically by filling their outermost energy levels (valence shells). By sharing electrons, both atoms involved in the bond can achieve a more stable configuration, similar to the noble gas configuration.

In an oxygen gas molecule, the two oxygen atoms are held together by a covalent bond. Covalent bonds involve the sharing of electron pairs between atoms. In the case of oxygen gas, each oxygen atom shares two electrons with the other oxygen atom, resulting in a stable molecule.

Therefore, a molecule of oxygen gas is made up of two oxygen atoms (O) bonded together by a covalent bond.

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Answer:

d= 4.8g/mL

m= 19.2 g

V=m/d

V= 4 mL

According to the given picture:

A represents the atomic number.

B represents the chemical symbol.

C represents the atomic mass.

D represents the name of the element.

The correct way to write the inverted molar mass of aluminum oxide (Al2O3) as a conversion factor is: Start Fraction 1 mole upper A l subscript 2 upper O subscript 3 over 102.0 grams upper A l subscript 2 upper O subscript 3 EndFraction.

The inverted molar mass of a substance is obtained by taking the reciprocal of its molar mass. In this case, the molar mass of aluminum oxide is given as 102.0 g/mol. To write the inverted molar mass as a conversion factor, we place 1 mole of Al2O3 in the numerator and the molar mass of Al2O3 (102.0 grams) in the denominator. This conversion factor allows us to convert between the number of moles and the mass of Al2O3.

In more detail, the conversion factor can be expressed as follows:

1 mole Al2O3 / 102.0 grams Al2O3

This means that for every 102.0 grams of aluminum oxide, there is 1 mole of aluminum oxide. Conversely, if we have a given mass of Al2O3, we can use this conversion factor to determine the corresponding number of moles, or vice versa. The conversion factor allows us to convert between the mass and the molar quantity of aluminum oxide, enabling us to perform calculations involving moles and grams of the substance.

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Answer:

False

Bouyant force = volume of displaced fluid * density of fluid

Answer: Dinitrogen trioxide

Explanation:

The number of water molecules in the container when one electron is removed from every hundredth water molecule and placed in a container is 100. m from the water is 3.30 x 1025.

Given,1 liter of water = 1000 g of water1 mole of water molecules = 6.022 x 1023 particles.

Therefore, 55.5 moles of water molecules = 55.5 x 6.022 x 1023 particles = 3.33 x 1025 particles one electron is removed from every hundredth water molecule.

So, 1 electron is removed from 1% of water molecules. Therefore, the number of water molecules from which the electron is removed = (1/100) x 3.33 x 1025 = 3.33 x 1023 molecules.

Now, this electron is placed 100 m away from the water container. The distance between the water container and the electron is not relevant for finding the number of water molecules in the container, hence can be ignored.

So, the number of water molecules in the container = Total number of water molecules - number of water molecules from which electron is removed= 3.33 x 1025 - 3.33 x 1023 = 3.30 x 1025.

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Answer:

The controls group = group c

Independent variable = number of mg with respect of growth hormone

Dependent variable = Chicken growth

Explanation:

According to the given situation, the controls group represents the group C. The independent variable shows the number of mg of the hormone growth

And, the dependent variable depicts the growth of a chicken

Also, in the contract group, there is nothing for addition

And, the chicken growth would be depended upon the hormonal growth

Answer:

Mostly, the molecule has a planar geometry allows free rotation of bonds. The chemical structure of the compound could be given as below. Urea Formula Molecular Mass. This molecule is generally available in final products of proteins of metabolism of humans and animals. Its main existence can be felt in the urine of humans that is formed

Explanation:

the molecular formula of urea is CH4ON2 if the %by mass of 02 atoms is one mole of urea molecule is 26.66%

Answer:

The correct option is;

D. (2)(56 g)

Explanation:

MgCl₂ + 2KOH → Mg(OH)₂ + 2KCl

From the balanced chemical reaction equation, we have;

One mole of MgCl₂ reacts with  two moles of KOH to produce one mole of Mg(OH)₂ and 2 moles of KCl

Therefore, the number of moles of KOH that react with one mole of KCl = 2 moles

The mass, m, of the two moles of KOH = Number of moles of KOH × Molar mass of KOH

The molar mass of KOH = 56.1056 g/mol

∴ The mass, m, of the two moles of KOH = 2 moles × 56.1056 g/mol = 112.2112 grams

The amount in grams of KOH that react with one mole of MgCl₂ = 112.2112 grams ≈ 112 grams =  (2)(56 g).

Answer:

the answer is D

Explanation:

good luck

Answer:

sunlight, carbon dioxide, and water :)

Chemicals are not supposed to be poured down the drain.

Chemicals should not be poured down the drain. This can cause harm to the plumbing system, sewage treatment plants, and the environment. Dispose of household chemicals properly by taking them to a designated recycling center or household hazardous waste collection event.

Thus the action that have been undertaken by Thomas and Trenton  is quite wrong since the chemicals that they have poured down the drain could lead to an environmental hazard.

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Answer:

Arcuate: A fan-shaped delta, bowed or curved.

Cuspate: V-shaped delta.

Bird-foot: Outstretched claws delta

Inverted: The narrow end of delta, or river delta.

Waves: Large or regular shaped waves delta.

Tires: Round shaped delta

River estuary: A landform deposited by sediment

Explanation:

(a) The main inorganic carbon system reactions in seawater involve the transfer of CO2 from the air phase into the water phase. The associated chemical equilibrium equations are as follows:

CO2 (aq) + H2O ↔ H2CO3 ↔ HCO3- + H+ ↔ CO32- + 2H+

CO2 (aq) is the dissolved CO2 in the water phase, H2CO3 is the carbonic acid, HCO3- is the bicarbonate ion, H+ is the hydrogen ion, and CO32- is the carbonate ion.

(b) Manipulation of the chemical equilibrium equations yields the following expressions for [HCO3-] and [CO32-] as a function of pCO2 and [H+] only:

[HCO3-] = K1*pCO2/[H+]

[CO32-] = K2*K1*pCO2/[H+]2

Where K1 and K2 are the carbonic acid and bicarbonate ion dissociation constants, respectively.

(c) If pH were to decrease while pCO2 remained the same, [HCO3-] would decrease more than [CO32-]. This is because the equation for [HCO3-] is directly proportional to [H+], whereas the equation for [CO32-] is inversely proportional to [H+]. As pH decreases, [H+] increases, so [HCO3-] decreases more drastically than [CO32-].

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