Give symbols of these elements:
Zinc
Argon
Gold
Lead
Magnesium
Uranium
Neon
Cobalt​

HF, HCl, HBr, HI, and HAt are the hydrohalic acids in order of strength from weakest to strongest.

Many hydrohalic acids are hydrohalic acid (chemistry) any acid that results from the binary combination of a halogen and hydrogen. In chemistry, hydrogen halides, which act as Arrhenius acids when in the aqueous phase, are diatomic inorganic compounds. HX is the formula, where X is one of the halogens, such as astatine, fluorine, chlorine, bromine, or iodine. At Standard Temperature and Pressure, all known hydrogen halides are gases.

Hydrogen halides are widely used to describe hydrohalic acids that react with water to form acids. The halogens' formula, HX, allows them to all be used for X. These are organic molecules with two atoms. Among the halogens are iodine, chlorine, bromine, and fluorine. The acid hydrofluoric acid (HF) is not a powerful acid. Since it partially dissociates in water, it is characterized as a weak acid.

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The dipole-dipole forces between CCl₄ molecules are greater than those between CH₄ molecules.

The observation that CCl₄ (carbon tetrachloride) deviates more from ideal gas behavior than CH₄ (methane) suggests that there are stronger intermolecular forces present in CCl₄. This deviation from ideal gas behavior can be attributed to the presence of dipole-dipole forces between CCl₄ molecules.

CCl₄ is a polar molecule due to the electronegativity difference between carbon and chlorine atoms. The partial positive charge on carbon and the partial negative charges on chlorine atoms result in dipole-dipole interactions between CCl₄ molecules. These dipole-dipole forces are stronger than the London dispersion forces present in CH₄.

In contrast, CH₄ is a nonpolar molecule, and its intermolecular forces are dominated by London dispersion forces, which arise from temporary fluctuations in electron distribution. London dispersion forces are generally weaker than dipole-dipole forces.

Therefore, the statement that best explains the observation is that the dipole-dipole forces between CCl₄ molecules are greater than those between CH₄ molecules, leading to a larger deviation from ideal gas behavior in CCl₄.

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Answer:

0.416 mol CaBr₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

83.1 g CaBr₂

Step 2: Identify Conversions

Molar Mass of Ca - 40.08 g/mol

Molar mass of Br - 79.90 g/mol

Molar Mass of CaBr₂ - 40.08 + 2(79.90) = 199.88 g/mol

Step 3: Convert

\(83.1 \ g \ CaBr_2(\frac{1 \ mol \ CaBr_2}{199.88 \ g \ CaBr_2} )\) = 0.415749 mol CaBr₂

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

0.415749 mol CaBr₂ ≈ 0.416 mol CaBr₂

Answer:

Plasma.

Explanation:

In science, matter can be defined as anything that has mass and occupies space. Any physical object that is found on earth is typically composed of matter. Matter are known to be made up of atoms and as a result has the property of existing in states. The three (3) classical states of matter are;

I. Solid.

II. Liquid.

III. Gas

Plasma can be defined as a state of matter in which the electrons temporarily separate from the protons and as a result, it is generally referred to as the fourth (4th) state of matter due to its superheated nature.

Answer:Helium

Explanation:

Helium can hold two electrons on the outer shell. as for the inner part it mostly looks like helium.

Answer: \(Zn+2Ag^+\rightarrow Zn^{2+}+2Ag\)

Explanation:

Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously and the number of electrons lost is equal to the number of electrons gained.

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

Anode : \(Zn\rightarrow Zn^{2+}+2e^-\)

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

Cathode : \(2Ag^++2e^-\rightarrow 2Ag\)

Thus the complete ionic equation will be :

\(Zn+2Ag^+\rightarrow Zn^{2+}+2Ag\)

The reaction is used for the anabolism is the dehydration. that means the loss of the water molecules.

The water is the universal solvent. water is the chemically reactive compound and the number of the biochemical reactions takes place. The hydrolysis is the reaction in which use water molecule break the bonds in between the large compounds. the hydrolysis reaction is used in the catabolism. such as the depolymerization of the protein molecules.

In the condensation reaction , the two molecules joined to form the large molecule. this reaction will leads to the water molecule loss. this is called dehydration reaction. the dehydration reaction used in the anabolism reaction or anabolic reaction.

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Answer:

After the mixture of the given mass of ice and water exchange heat, and ice is removed at 0°C, the mass of ice that has melted is equal to 42 g.

The answer is option(D)

We will be using the principles of heat transfer to solve this question.

The two main ideas, based on which heat transfer problems are solved, are given below.

       Q = m*s*Δt

       Q = Heat Energy, in J

      m = mass of the sample, in g

       s = Specific Heat Capacity, in J/g.°C

       Δt = change in temperature, in °C

        (We assume that heat energy is not converted into other forms in             such ideal cases)

Now combining the principles, we can make a modified equation as follows.

m₁*s₁*Δt₁ = m₂*s₂*Δt₂

Heat Lost  = Heat Gained

(**Note that both heat lost and the heat gained are absolute values, and thus in case of a negative answer, apply modulus to avoid errors)

We would also require the formula for the Latent Heat of Fusion lost by ice in this case.

Heat lost = m * L

where L = Latent Heat Capacity of Ice, 330J/g

For the question, we assume that due to the mixture of ice and water, the final temperature of the mixture would be a temperature T, which in this case is 0°C.

Heat lost by water = Heat gained by the ice

| 100g * 4.2 (J/g.°C) * (0 - 33)° | = | m * 330 |

|420 * -33 | = 330m

420 * 33 = 330m

m = 420 * (33/330)

m = 42g

Thus, about 42g of ice got melted during the exchange of heat energy in the mixture.

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The mass of ice that is melted is 42 g.

Mass of the water, m₂ = 100 g

Initial temperature, T₁ = 33°C

Final temperature, T₂ = 0°C

Specific heat capacity of water, C = 4.2 J/g°C

Latent heat of fusion of ice, L = 330 J/g

The quantity of heat energy needed per unit of mass to increase the temperature of a substance is known as its specific heat capacity. Among a material's physical characteristics is its specific heat capacity.

According to the principle of calorimetry,

The heat gained by the ice = heat lost by the water

m₁L = m₂CΔT

Therefore, the mass of ice that is melted is,

m₁ = m₂CΔT/L

m₁ = 100 x 4.2 x 33/330

m₁ = 420/10

m₁ = 42 g.

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Answer:

D............................

There are two types of chemical compound one is covalent compound and another is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. The correct representation is option D.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

Covalent bond is present in molecule HCl. Hydrogen has 1 electron in its outermost shell. Chlorine has 7 electrons in its valence shell. So one one electron from each element is shared between them to form a covalent bond.

Therefore, the correct representation of arrangement of electrons in a hydrogen chloride molecule is option D.

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Answer:

have one delocalised electron

Explanation:

The elements which are  present of left side of periodic table have similar chemical properties.

Periodic table is a tabular arrangement of elements wherein elements are arranged according to their atomic numbers. It consists of seven horizontal rows called periods  and eighteen vertical columns called groups .

Elements in the same group have similar chemical properties as they have same number of valence electrons. While, electrons in the same period have different valence electrons as electrons are added to same shell and hence have  a little variation in chemical properties.

It is called periodic as properties repeat after an interval of certain electronic configuration. Elements are divided in four blocks depending on their properties.

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Answer:

Workplace Hazardous Materials Information System

WHMIS is a short form for Workplace Hazardous Materials Information System. It is a comprehensive plan for providing information on the safe use of hazardous materials used in Canadian workplaces. Information is provided by means of product labels, material safety data sheets (MSDS) and worker education programs.

Answer:

Workplace Hazardous Materials Information System

Explanation:

The general equation for the reaction of a halogen with a metal (assuming a 2+ charge on the metal) is: 2M + X₂ → 2MX

In this equation, M represents the metal (with a 2+ charge) and X represents the halogen. The reaction involves the combination of one mole of the metal with one mole of the halogen to form two moles of the metal halide compound (MX).

The 2M on the left side of the equation represents two moles of the metal, each with a 2+ charge. The X₂ represents one mole of the halogen, which exists as a diatomic molecule (e.g., Cl₂, Br₂, I₂).

During the reaction, the metal atoms lose two electrons each to achieve a stable 2+ charge, and the halogen atoms gain one electron each to complete their valence shell. This results in the formation of two moles of the metal halide compound (MX) in which the metal is in its 2+ oxidation state and bonded to the halogen.

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Answer:

C

Explanation:

Imcreased tmperature will speed up a reaction/process.

Answer:

C

Explanation:

Adding catalyst can most effectively speed up the chemical reaction.

Answer:

File down there

Explanation:

Arts helps us to understand the world with the help of textures and deepness of the art. Science is the only way with the help of which we are able to understand the beauty of the nature.

Arts:

Arts gives us meaning and help us to understand the world around us. Even the  Scientific studies have proven that art appreciates improves our life quality of life and makes us feel good. When we create the art then we define our mood, the situations around us, the environment exists around us and open our minds with new ideas.

Science:

First of all the science helps our understanding of the world around us. Every thing we know about the universe, we know how the trees grew up, we know how the habitat exists on the earth, we know that how the weather and climate changes. This is all due to the science. Human progress throughout history has largely rested on advances in science.

So we can conclude that: Arts helps us to understand the world with the help of textures and deepness of the art. Science is the only way with the help of which we are able to understand the beauty of the nature.

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Answer:

A: Both artists and scientists use their imagination to create things.

B: Both artists and scientists rely on others in their field for inspiration.

D: Both artists and scientists use technological innovations to explore new possibilities.

Explanation:

When a can of coke is removed from the fridge and then warmed up to room temperature, the entropy of the beverage will increase.

We can define entropy as the disorderness of a system or the randomness of a particular system. The entropy of a system changes with a change in the temperature of the system.

As the temperature increases, the entropy of the system also increases and when the temperature is reduced, the entropy of the system also decreases. When a can of coke is kept in fridge, the entropy decreases as the temperature gets decreased.

As the can of the coke is taken out and warmed up to room temperature, the entropy increases with the increase in temperature as the randomness of the molecules increases.

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Answer:

Explanation:

Glaciers are melting, sea levels are rising, cloud forests are dying, and wildlife is scrambling to keep pace. It has become clear that humans have caused most of the past century's warming by releasing heat-trapping gases as we power our modern lives. Called greenhouse gases, their levels are higher now than at any time in the last 800,000 years.

We often call the result global warming, but it is causing a set of changes to the Earth's climate, or long-term weather patterns, that varies from place to place. While many people think of global warming and climate change as synonyms, scientists use “climate change” when describing the complex shifts now affecting our planet’s weather and climate systems—in part because some areas actually get cooler in the short term.

Climate change encompasses not only rising average temperatures but also extreme weather events, shifting wildlife populations and habitats, rising seas, and a range of other impacts. All of those changes are emerging as humans continue to add heat-trapping greenhouse gases to the atmosphere, changing the rhythms of climate that all living things have come to rely on.

What will we do—what can we do—to slow this human-caused warming? How will we cope with the changes we've already set into motion? While we struggle to figure it all out, the fate of the Earth as we know it—coasts, forests, farms, and snow-capped mountains—hangs in the balance.

Answer: They are very luminous without being very hot.

Explanation: I hope this is right

While the atomic mass of oxygen is approximately 16 daltons, its mass in grams would be a different value due to the conversion between daltons and grams using Avogadro's constant.

The atomic mass of an oxygen atom is approximately 16 daltons. Dalton, also known as atomic mass unit (amu), is a unit used to express the atomic and molecular weights of elements and compounds. The atomic mass of an element is determined by the total number of protons and neutrons in the nucleus of its atoms.

In the case of oxygen, it has an atomic number of 8, which indicates that it has 8 protons in its nucleus. The most common isotope of oxygen has a mass number of 16, meaning it has 8 protons and 8 neutrons. Since the mass of a proton and neutron is approximately 1 dalton, the total atomic mass of an oxygen atom with 8 protons and 8 neutrons is approximately 16 daltons.

It is important to note that the atomic mass is not directly equivalent to grams. The atomic mass is a relative scale based on the carbon-12 isotope, where carbon-12 is assigned a mass of exactly 12 daltons.

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Answer:

Hello! Some household items that are electroplated include kitchenware, such as metal pots and pans, door handles, mobile phones, and coins. An electroplated object is coated by electrolytic deposition with chromium, silver, or another metal.

Answer:

7.23 x 10^24 atoms

Explanation:

Use Avogadro's number that states that there are 6.022 x 10^23 particles in one mole:

12 mol O x (6.022 x 10^23) atoms = 7.23 x 10^24 atoms

Answer:

Second one

Explanation:

Answer:

Answer: 3.01 * 10^35

Explanation:

500,000,000,000 * 6.02 * 10^23

Answer:

If you were to plug your nose, it would block out more than 80% of taste, causing all three items to have no taste- therefore making them taste the same.

Explanation:

Among the given options, the weak electrolytes are NH₃ and CH₃OH.

NH₃ (ammonia) is a weak base, and when it dissolves in water, it produces ammonium ions (NH₄⁺) and hydroxide ions (OH⁻), but only to a limited extent.

CH₃OH (methanol) is a polar molecule and can form hydrogen bonds with water, but it does not ionize or dissociate into ions when dissolved in water. Therefore, it is considered a weak electrolyte.

On the other hand, CaSO₄ (calcium sulfate) and AgCl (silver chloride) are both ionic compounds that dissociate into ions in water and conduct electricity well. Therefore, they are strong electrolytes.

In summary, NH₃ and CH₃OH are weak electrolytes, while CaSO₄ and AgCl are strong electrolytes.

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