why does silver melt ice?

Answer:

The helium atom is already stable and doesn't need to bond with other atoms or share electrons. Helium's lowest energy level can only hold two electrons, which are paired.

Imagine that a classmate draws an electron dot diagram for a helium atom with two dots. He or she tells you that these dots mean helium atom has two unpaired electrons to have four pairs of valence electrons and become stable. If it loses 2 electrons then it becomes double charged helium and helium has no unpaired electron.

Helium is a noble gas. The symbol of Helium is He. Helium has two valence electrons. Helium atom has no unpaired electrons.  Helium has two electrons in the outermost shell.

Thus, from the above conclusion we can say that  If helium loses 2 electrons then it becomes double charged helium and helium has no unpaired electron.

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2. The [OH¯] in the solution containing [H₃O⁺] = 5.70×10¯¹⁹ M is 1.75×10⁴ M

3. The [H₃O⁺] of a solution containing [OH¯] = 1×10¯⁵ M is 1×10¯⁹ M

This is simply a measure of the acidity / alkalinity of a solution.

The pH measures the hydrogen ion, H⁺ concentration while the pOH measures the hydroxide ion, OH¯ concentration

[H₃O⁺] × [OH¯] = 10¯¹⁴

From the question given above, the following data were obtained:

[H₃O⁺] × [OH¯] = 10¯¹⁴

Divide both sides by [H₃O⁺]

[OH¯] = 10¯¹⁴ / [H₃O⁺]

[OH¯] = 10¯¹⁴ / 5.70×10¯¹⁹

[OH¯] = 1.75×10⁴ M

[H₃O⁺] × [OH¯] = 10¯¹⁴

Divide both sides by [OH¯]

[H₃O⁺] = 10¯¹⁴ / [OH¯]

[H₃O⁺] = 10¯¹⁴ / 1×10¯⁵

[H₃O⁺] = 1×10¯⁹ M

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I uploaded the answer to a file hosting. Here's link:

tinyurl.com/wpazsebu

Answer:

C. newton's third law of motion

Explanation:

as newton's third law of motion states that every action has a reaction that is equal in size, opposite in direction, and acts simultaneously.

Lattice energy is the energy required to completely separate one mole of a solid ionic compound into its gaseous ions. The lattice energy depends on the charges of the ions and their distance from each other. As the charges of the ions increase, the lattice energy also increases, and as the distance between the ions decreases, the lattice energy also increases.

To arrange the compounds based on their expected lattice energy, which means we need to consider the charges of the ions and their ionic radii. The larger the ion size, the smaller the lattice energy because the ions are farther apart from each other, and the smaller the ion size, the greater the lattice energy because the ions are closer to each other.

The cation size generally increases as you move down a group in the periodic table and decreases as you move across a period. Therefore, the expected order of increasing lattice energy for these compounds is: BeO < MgO < CaO < SrO < BaO.

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Answer:

The change from a liquid phase to a gaseous phase occurs when the vapor pressure of the liquid is equal to the atmospheric pressure exerted on the liquid.

Explanation:

Boiling is a physical change and molecules are not chemically altered during the process.

Answer:

D.

Explanation:

Thank me later

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The volume of the balloon in the freezer is approximately 1.77 L.The ideal gas law is PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature.

Since pressure is constant, we can use the combined gas law to solve the problem.The combined gas law is

P1V1/T1 = P2V2/T2,

where P1 and T1 are the initial pressure and temperature, and P2 and T2 are the final pressure and temperature. Let's start with the initial state of the balloon:

V1 = 2.00 L T1

= 32.0 °C + 273.15 K

= 305.15 K

Now let's find the final volume of the balloon when it's in the freezer:

V2 = P1V1T2/T1P1

= constant

T2 = -3.6 °C + 273.15 K

= 269.55 K

Now we can plug in the values and solve for V2:

V2 = P1V1T2/T1

= (1 atm)(2.00 L)(269.55 K)/(305.15 K)

≈ 1.77 L

Therefore, the volume of the balloon in the freezer is approximately 1.77 L.

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Protons are the subatomic particles which has positive charge.

The protons define the element.

So for example, every element that has 1 proton is hydrogen.

Hydrogen is a gas.

Every element that has 23 protons would be vanadium.

Vanadium is a chemical element with an atomic number 23.

Answer:

WASSUP BRO

Explanation:

The gases can be converted into liquids by bringing its particles closer so atmospheric either by decreasing temperature or by increasing pressure

Answer:

The gases can be converted into liquids by bringing its particles closer so atmospheric gases can be liquefied either by decreasing temperature or by increasing pressure.

Explanation:

The relationship between temperature and water density is an inverse relationship.

A measure of the typical kinetic energy of the atoms or molecules in a system, the temperature is a physical variable that expresses hot and cold.

The definition of density is the mass of a substance per unit volume. Density is defined as the ratio of mass to volume, or mass per unit volume.

An inverse relationship exists between temperature and density. The density of water drops because of the increased distance between water molecules as temperature rises. Water's density rises when its temperature drops, but only to a certain extent.

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From the calculation, the relative atomic mass of the Coronadium is  122.1

We know that an atom is composed of isotopes. This is the reason why the average atomic mass of compounds is not a while number. It is actually the weighted average of the relative atomic masses of all the isotopes that are in the atom.

Given that we have the total number of atoms as 80, we would now find the relative abundance of each of the isotopes;

Coronadium - 119 = 10/80 * 100 = 12.5%

Coronadium -121 = 20/80 * 100 = 25%

Coronadium - 123 = 50/80 * 100 = 62.5%

Now we can use this information to obtain the relative atomic mass as follows;

Relative atomic mass of Coronadium = (0.125 * 119) + (0.25 * 121) + (0.625 * 123)

= 14.9 + 30.3 + 76.9

= 122.1

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The theoretical yield of sodium chloride for the reaction of 55.0 g Na with 67.2 g Cl2 is 141 g.

The theoretical yield of a chemical reaction refers to the maximum quantity of product that may be obtained by reacting specified quantities of reactants. The theoretical yield is determined using stoichiometry. The amount of product that is really obtained from a reaction is called the actual yield.

Theoretical yield is computed using stoichiometry by calculating the number of moles of each reactant involved in the reaction and then converting these values to the mass of the final product using the stoichiometry coefficients. The number of moles can be calculated using the molecular weight of each substance.

Let us calculate the theoretical yield of NaCl using the given data,55.0 g Na + 67.2 g Cl2 (balanced equation)

Now we calculate the moles of each substance using their respective molecular weights Na (sodium) molecular weight = 22.9898 g/mole
Moles of Na = 55.0 g / 22.9898 g/mole = 2.39 molesCl2 (chlorine)

molecular weight = 35.45 g/mole

Moles of Cl2 = 67.2 g / 35.45 g/mole = 1.90 moles

according to the balanced equation:2 Na + Cl2 → 2 NaCl

From the balanced equation, the mole ratio of Na and Cl2 is 2:1. Thus, Cl2 is the limiting reagent.

This implies that all of the 1.90 moles of Cl2 will be consumed, while only 2 x 1.90 = 3.80 moles of Na are necessary. The mass of NaCl can now be calculated using the mole ratio and the molecular weight of NaCl.

The molecular weight of NaCl = 58.44 g/mole

Theoretical yield = moles of NaCl x molecular weight of NaCl= 1.90 moles x 58.44 g/mole= 111.036 g≈ 141 g (to the nearest whole number)

Therefore, the theoretical yield of sodium chloride for the reaction of 55.0 g Na with 67.2 g Cl2 is 141 g.

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The major product of a reaction involving H2SO4 depends on the specific reactants and conditions. It can act as a strong acid and a dehydrating agent, leading to various possible products.

When H2SO4 is involved in a reaction, it can have various effects depending on the reactants and conditions. It can act as a strong acid, donating a proton (H+) to another compound. It can also act as a dehydrating agent, removing water molecules from other compounds.

The major product of a reaction involving H2SO4 will depend on the specific reactants and conditions. In some cases, H2SO4 can catalyze the rearrangement of functional groups, leading to the formation of different products. In other cases, it can promote the formation of new bonds or facilitate the elimination of water molecules.

To determine the major product of a specific reaction involving H2SO4, it is necessary to consider the reactants, their functional groups, and the reaction conditions. Experimental data and knowledge of reaction mechanisms can also provide insights into the expected products.

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Depending on the specific reactants and circumstances, H2SO4 reactions can produce a variety of main products.

Thus, It can function both as a potent acid and a dehydrating agent, producing a variety of potential goods.

Depending on the reactants and circumstances, H2SO4 can have a variety of consequences in a reaction. It can function as a potent acid, giving another chemical a proton (H+). It has the ability to dehydrate materials by eliminating water molecules from other substances.

The main byproduct of an H2SO4 reaction will vary depending on the exact reactants and circumstances. H2SO4 can occasionally stimulate the reorganization of functional groups, resulting in the production of various compounds.

Thus, Depending on the specific reactants and circumstances, H2SO4 reactions can produce a variety of main products.

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The major product of the following reaction is :

Fuming sulfuric acid (H2SO4 + SO3) is added to benzene.

​

The gravitational potential energy for the object is  9800 J.

The gravitational potential is the scalar amount characteristic of a point in a gravitational field whose slope breaks even with the escalated of the field and rises to the work required to move a body of unit mass from a given point to a point interminably farther.

The formula referred  for calculating the gravitational  potential to the ground level is given by

        U = mgh

where m  is the mass of the object and g is the gravitational constant and last h is the height from the ground where the object is situated.

As we provided with,

g = 9.8 ms-2

m = 200 kg  

h = 5m

So substituting the required values in the formula m we get  

=  200 x 9.8 x 5

=  9800 J

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The ionization state will occur at a pH range of 2.10 to 9.47. The ionization state occurs in this range because, when the pH is greater than the pKa, the compound is deprotonated and when pH is less than pKa , the compound is protonated at that location.

Here is how the sentences should be completed to explain at what pH range the ionization state in the previous part exists:pH range of 7.40 to 9.47.The ionization state will occur at a pH range of 7.40 to 9.47.This ionization state occurs in this range because when the pH is greater than the pKs (by more than one unit), the compound is at that location.

When the pH is less than the pKa, the compound is protonated, and when the pH is greater than the pKa, the compound is deprotonated.Ionization state is the state of a chemical compound with ionizable functional groups when an atom or molecule loses or gains electrons.

To form a cation, an atom or molecule loses electrons, while to form an anion, an atom or molecule gains electrons.

The complete question is given below:

Complete the sentences to explain at what p range the ionization state in the previous part exists.

Match the words given below to the appropriate.

Reset Help: (2.10, 4.07, 7.40, 9.47, protonated, deprotonated)

The ionization state will occur at a pH range of ____ to _____. This ionization state occurs in this range because, when the pH is greater than the pKs (by more than one unit), the compound is ______ at that location. When the pH is less than the pKa. the compound is ______ at that location

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Answer:

Explanation:

substance (as an acid or salt) that when dissolved (as in water) conducts an electric current.

Answer:

An electrolyte is a compound which produces ions when dissolved in a solution such as water. These ions have either a positive or negative electrical charge, which is why we refer to these compounds as electro-lytes

Answer:

Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present. Physical properties can be measured without changing a substance's chemical identity

Explanation:

Answer:

yes this above answer is right

Molar concentration of Sodium chloride (NaCl) means the number of moles of sodium chloride present in 1L of water.

Molar mass of NaCl = Molar mass of Na + Molar mass of Cl

Molar mass of NaCl = 23 + 35.5

Molar mass of NaCl = 58.5g

∴ 1L of water contains 55.55 moles of water. Hence,

Mass of ocean water = 55.55 × 18 = 999.9g

Since, 1L of ocean water has a mass of 999.9g of which 3.5% is the salt.

hence, (999.9) (0.035) = 34.99g

So, No. of moles of NaCl = Mass of NaCl / 58g NaCl per mol

No. of moles of NaCl = 34.99/58.5

No. of moles of NaCl = 0.59 moles

So, Molar concentration or Molarity would be 0.59 moles present in 1L of solution.

Hence, Molarity or Molar Concentration = Moles of NaCl/ Volume of solution (in L)

Molarity = 0.59/1L

⇒ Molarity = 0.59M

Hence, the molarity is 0.59M

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Answer:

Powering society: Energy is essential for powering homes, businesses, industries, and transportation systems. It enables the functioning of modern society by providing electricity, heating, cooling, and mechanical power.

Economic growth: Reliable and affordable energy sources contribute to economic growth and development. Industries rely on energy to manufacture products, operate machinery, and provide services. Access to energy supports job creation, increases productivity, and drives economic competitiveness.

Improved quality of life: Energy plays a crucial role in improving the quality of life for individuals and communities. It enables access to clean water, sanitation, healthcare services, education, and information technology. Energy-powered devices and appliances enhance comfort, convenience, and entertainment.

Sustainable development: Renewable energy sources such as solar, wind, hydro, and geothermal offer advantages in terms of environmental sustainability. They help reduce greenhouse gas emissions, mitigate climate change, and decrease dependence on finite fossil fuel resources. Renewable energy also promotes energy diversification and enhances energy security.

Innovation and technology: The energy sector drives innovation and technological advancements. Research and development in energy technologies lead to more efficient, cost-effective, and environmentally friendly solutions. Advancements in energy storage, grid infrastructure, and smart systems contribute to a more resilient and flexible energy supply.

Environmental benefits: Transitioning to cleaner energy sources helps mitigate environmental issues. Renewable energy generation produces minimal air and water pollution, reducing the negative impact on ecosystems and human health. Decreased reliance on fossil fuels reduces carbon dioxide emissions, combating climate change.

Energy independence: Diversifying energy sources and reducing dependence on imports enhances energy security for countries. By developing domestic energy resources and investing in renewable energy, nations can reduce vulnerability to price fluctuations, geopolitical tensions, and supply disruptions.

Rural electrification: Energy access is crucial for rural areas where many people lack electricity. Reliable energy supply promotes economic opportunities, improves healthcare and education services, and enhances overall living conditions in rural communities.

Answer:

h20

Explanation:

Reactions with oxygen are not related to chemical weathering.

Chemical weathering is a process that changes the chemical composition of rock, minerals, and soils through chemical reactions. The following are common examples of chemical weathering:

Dissolution: This occurs when minerals dissolve in water, which can change the composition of the rock. For example, the minerals in limestone dissolve in rainwater that is slightly acidic, leading to the formation of caves.

Frost wedging: This occurs when water freezes and expands in cracks in rock, causing the rock to break apart. This is a mechanical process, but it can lead to chemical weathering if the broken rock is exposed to chemical weathering agents.

Reactions with water: This type of chemical weathering occurs when water reacts with minerals in rock, leading to the formation of new minerals or the alteration of existing minerals. For example, the reaction of water with feldspar minerals in granite can produce clay minerals.

Reactions with oxygen, on the other hand, are part of a separate process called oxidation, which is not considered to be a type of chemical weathering. In oxidation, the minerals in rock react with oxygen in the air to form new compounds, such as rust on iron-bearing minerals.

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A molecule with 3 single bonds and 1 lone pair of electrons around the central atom is predicted to have a trigonal pyramidal molecular geometry.

Some additional information that could be helpful to understand the molecular geometry of this type of molecule:

In this type of molecule, the central atom has three atoms bonded to it and one lone pair of electrons. The arrangement of these atoms and electrons determines the molecule's molecular geometry.

The geometry is determined by the VSEPR (Valence Shell Electron Pair Repulsion) theory, which states that electron pairs around a central atom will arrange themselves to minimize repulsion and maximize the distance between them.

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Answer:

Invertebrates are animals which do not have vertibral column. They do not debelop it also. For example: Arthropods , Crawfish and Sea Urchin.

Answer:

6.64 l is the answer.......

1. The mass of unstable isotope would be left in 2 hours is 50 g

2. The mass of unstable isotope would be left in 4 hours is 25 g

3. The mass of unstable isotope would be left in 10 hours is 3.125 g

We'll begin by calculating the number of half-lives that has elapsed.

n = t / t½

n = 2 / 2

n = 1

Finally, we shall determine the mass remaining.

N = N₀ / 2ⁿ

N = 100 / 2¹

N = 50 g

We'll begin by calculating the number of half-lives that has elapsed.

n = t / t½

n = 4 / 2

n = 2

Finally, we shall determine the mass remaining.

N = N₀ / 2ⁿ

N = 100 / 2²

N = 25 g

We'll begin by calculating the number of half-lives that has elapsed.

n = t / t½

n = 10 / 2

n = 5

Finally, we shall determine the mass remaining.

N = N₀ / 2ⁿ

N = 100 / 2⁵

N = 3.125 g

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Answer:

An outlier on a scatter plot represents something that doesn't fit.

The outlier on this scatter plot is D.(105, 320) might represent a newborn shark

The air is cooled by the currents, which causes it to rise and warm when it crosses land. This warming causes the air to hydrate, then afterward precipitates as the air passes deeper inland.

The impacts of grasslands hitting the sea are typically astounding. Namibia and or the Western Sahara constitute the place where the African desert meets north Mediterranean Sea. Moreover, the Sahara extends eastward to the Red Sea. The Atacama Desert and the Pacific Ocean meet strikingly in northern Chile.

Cold ocean currents that move near the shore drive coastal deserts to emerge. The air is stabilised by the chilly winds, which also prevent cloud development. It produces a significant amount of fog. A dense blanket of minute water droplets which are too light to disperse as rain makes up a fog.

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