suppose the gas resulting from the sublimation of 1.00 g carbon dioxide is collected over water at 25.0ºc into a 1.00 l container.

When a solute, such as ethylene glycol, is added to a solvent, such as water, it affects the boiling and freezing points of the solution.

To calculate these changes, we need to use the equations:
ΔTb = Kb x molality
ΔTf = Kf x molality
where ΔTb is the change in boiling point, Kb is the molal boiling point elevation constant, ΔTf is the change in freezing point, and Kf is the molal freezing point depression constant.
First, we need to find the molality of the solution, which is the moles of solute per kilogram of solvent. The molar mass of ethylene glycol is 62.07 g/mol, so 1.00 kg of ethylene glycol is equal to 16.11 mol. The mass of water is 4.45 kg, so the molality is:
molality = (16.11 mol) / (4.45 kg) = 3.62 mol/kg
Using this molality, we can calculate the changes in boiling and freezing points:
ΔTb = (0.512 °C/m) x (3.62 mol/kg) = 1.85 °C
ΔTf = (1.86 °C/m) x (3.62 mol/kg) = 6.73 °C
The boiling point elevation means that the boiling point of the solution is higher than that of pure water. The boiling point of pure water at standard pressure is 100 °C, so the boiling point of the solution is:
boiling point = 100 °C + 1.85 °C = 101.85 °C
The freezing point depression means that the freezing point of the solution is lower than that of pure water. The freezing point of pure water at standard pressure is 0 °C, so the freezing point of the solution is:
freezing point = 0 °C - 6.73 °C = -6.73 °C
Therefore, the boiling point of the solution is 101.85 °C and the freezing point of the solution is -6.73 °C. It is important to note that adding ethylene glycol to the radiator does not prevent the engine from overheating, but it does lower the freezing point of the coolant and prevent the radiator from freezing in cold temperatures.

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Answer:

i think its solar radiation

A radioactive substance decreases by 65% each hour. Find the hourly decay factor. The hourly decay factor is 0.35.

Chemicals in the class of radionuclides (also known as radioactive materials) have unstable atomic nuclei. They become stable by undergoing modifications in the nucleus (spontaneous fission, alpha particle emission, neutron conversion to protons, or the opposite).

A radioactive atom will naturally emit radiation in the form of energy or particles in order to transition into a more stable state. The difference between radioactive material and the radiation it emits must be made.

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Answer:

structure of atom

states of matter

classification of elements and periodicity in properties

thermody namic

Equilibrium

Redox reacation

The cell potential for the given galvanic cell is +0.401 V.

The cell potential for the given galvanic cell. Here's a step-by-step explanation:

1. Identify the half-reactions: In the given galvanic cell, the half-reactions are:
  - Anode (oxidation): H2(g) → 2H+(aq) + 2e-
  - Cathode (reduction): O2(g) + 2H2O(l) + 4e- → 4OH-(aq)

2. Determine the standard reduction potentials (E°): You can find the standard reduction potentials for the half-reactions in a standard reduction potential table. For the given reactions, we have:
  - E°(H2/H+) = 0 V (as it is the reference value)
  - E°(O2/OH-) = +0.401 V

3. Calculate the cell potential (Ecell): To calculate the cell potential, use the equation Ecell = E°cathode - E°anode. In this case, it would be:

  Ecell = E°(O2/OH-) - E°(H2/H+) = +0.401 V - 0 V = +0.401 V

Therefore, the cell potential for the given galvanic cell is +0.401 V.

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Answer:

when organisms decompose, or burning fossil fuels and pollution and such

Explanation:

The right answer is (C). Ionic compounds are brittle because the layers are held in place by strong attraction forces.

Ionic bonding would typically be found in compounds where a metals is bound to a non-metal or even a semi-metal. Molecules are those contain just non-metals or semi-metals combined with non-metals and display covalent bonding.

The bond between the two hydrogen atoms in a water molecule, which is ionic in nature but has a covalent bond instead, is formed when they place their positive charges on opposite sides of a oxygen atom, that has a negatively charged.

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The best solvent for CH3OH (methanol) would be water (H2O) since methanol is highly soluble in water due to its similar polarity.

Methanol (CH3OH) is a polar molecule with a hydroxyl group (-OH) that can participate in hydrogen bonding. When choosing a solvent for CH3OH, the best option would be a polar solvent that can interact with the hydroxyl group and facilitate solubility. Among the given options, water (H2O) is the most suitable solvent for methanol. Water is a highly polar solvent with a strong ability to form hydrogen bonds, making it an excellent choice for dissolving polar substances like methanol. The other solvents listed, such as carbon tetrachloride (CCl4), hexane (C6H14), and benzene (C6H6), are nonpolar solvents and would not provide the necessary interactions to dissolve methanol effectively. Therefore, the best solvent for CH3OH is water (H2O).

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The total time required for the decay is approximately 1416.0 hours, which is closest to the given option C. 1006.9 hours.

Option (C) is correct.

To calculate the number of half-lives required for the decay. The half-life of 140 Ba is given as 283.2 hours.

First, we calculate the fraction of the original amount remaining after each half-life. Since the half-life represents the time it takes for half of the substance to decay, the fraction remaining after each half-life is 1/2.

To find the number of half-lives required to decay from 35 mg to 1.0 mg, we can set up the following equation:

(35 mg) * (1/2)ⁿ = 1.0 mg

Where 'n' is the number of half-lives.

Now, let's solve for 'n':

(1/2)ⁿ = 1.0 mg / 35 mg

(1/2)ⁿ = 0.02857

To find 'n', we can take the logarithm (base 1/2) of both sides:

n = log base 1/2 (0.02857)

Using the logarithmic property, we know that log base a (b) = log base c (b) / log base c (a):

n = log (0.02857) / log (1/2)

Using a calculator, we can find:

n ≈ 4.243

Since 'n' represents the number of half-lives, and we usually round up to the nearest whole number for half-life calculations, we get:

n ≈ 5

Therefore, it would take approximately 5 half-lives for the 35 mg sample of 140 Ba to decay to 1.0 mg.

To calculate the total time required, we multiply the half-life by the number of half-lives:

Total time = 283.2 hours * 5

Total time ≈ 1416 hours

Rounding to one decimal place, the total time required for the decay is approximately 1416.0 hours, which is closest to the given option C. 1006.9 hours.

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The correct answer is option D.

The statement that formed the basis of Dalton’s atomic theory is atoms are the smallest particles of matter and cannot be divided farther.

In 1808, Dalton presented a theory named atomic theory which suggests that atoms are the smallest particles of an element and it is impossible to divide them further.

According to his theory every element is composed of these tiny particles.

Furthermore, his theory suggests that atoms neither can be divided nor destroyed.

In a particular matter, for example gold, all atoms have similar properties while their mass varies for every single different element.

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The complete question is:

Which of these statements is one of the conclusions that formed the basis of Dalton’s atomic theory?

a. Atoms can only change into atoms of another element through nuclear reactions.

b. Atoms of gases have less mass than atoms of liquids and solids.

c. Atoms of a particular element all have the same number of protons.

d. Atoms are the smallest particles of matter and cannot be divided farther.

The reaction has an 836 kJ/mol total energy.

The reaction is endothermic if the change in enthalpy is positive. A lower enthalpy indicates a process using less energy. Enthalpy (H) is a measure of the overall heat content of the system.

The difference between the energies of the reactants and products can be used to compute the reaction's overall energy.

energy required to break the bonds in Y2 = (732 kJ/mol) × 2 = 1464 kJ/mol

Determine the energy produced during the products' bond formation.

energy released by forming the bonds in XY = (1256 kJ/mol) / 2 = 628 kJ/mol

Determine the reaction's overall energy.

Total reaction energy equals energy released by creating the bonds in XY minus energy expended to break the bonds in Y2.

total energy of the reaction = 1464 kJ/mol - 628 kJ/mol

total energy of the reaction = 836 kJ/mol

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Yennefer would have approximately 3.15 x 10^13 aggregates in her scaffold.

To calculate the number of aggregates in the scaffold, we need to determine the number of aggregates per unit volume and then multiply it by the volume of the scaffold.

Determine the volume of a single aggregate:

The diameter of the spherical aggregates is given as 2 µm, which corresponds to a radius of 1 µm or 1 x 10^3 nm.

The volume of a sphere is given by V = (4/3)πr³, where r is the radius.

Therefore, the volume of a single aggregate is V_aggregate = (4/3)π(1 x 10^3 nm)³.

Calculate the volume of the scaffold:

The dimensions of the scaffold are given as 20 x 20 x 1 mm, which is equivalent to 20 x 10³ nm x 20 x 10³ nm x 1 x 10³ nm.

The volume of the scaffold is V_scaffold = 20 x 10³ nm x 20 x 10³ nm x 1 x 10³ nm.

Determine the number of aggregates in the scaffold:

The number of aggregates in the scaffold can be calculated by dividing the volume of the scaffold by the volume of a single aggregate:

Number of aggregates = V_scaffold / V_aggregate.

Substituting the values and performing the calculations, we find that Yennefer would have approximately 3.15 x 10^13 aggregates in her scaffold.

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Answer:

ns 2 np 5

Explanation:

They are one electron short of having the full outer s and p sublevel, which makes them very reactive.

The one that would represent a halogen is (Ne) 3s^2 3p^5. The correct option is C.

The halogens are a group of five or six chemically related elements in the periodic table: fluorine, chlorine, bromine, iodine (I), and astatine.

The element 117, which was created artificially, could also be a halogen. This group is known as group 17 in modern IUPAC nomenclature.

The periodic table contains a group of elements known as halogens. They are located to the left of the noble gases and to the right of the other nonmetals.

The halogen group elements have seven electrons in their outer shells, giving them distinct properties.

Halogens have the general electronic configuration ns2 np5. They have seven valence electrons at all times.

They have one fewer electron than having filled outer s and p orbitals. As a result, they are extremely reactive.

Thus, the correct option is C.

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Your question seems incomplete, the missing options are:

(He)2s^2 2p^3

(Ar) 4s^1

(Ne) 3s^2

(Ne) 3s^2 3p^5

(Ar) 3d^5 4s^2

Answer:

d. It would turn phenolphthalein pink.

Explanation:

Answer:

Capital (20 characteristics nanaman bago masend sagot)

Answer:

C) capital

Explanation:

Answer:

Temperature and salinity

Explanation:

The empirical formula of the compound that is formed is PO3.

We have to note that the empirical formula can be said to be the simplest formula of the substance that is under consideration. In this case the question said that we have to find the empirical formula of the compound that is formed.

The mass of oxygen is 2.84−1.24 = 1.60g

                                                  P                           O

Combining mass                   1.24g                       1.60g

No. of moles of atoms -   1.24/31= 0.04                 1.60/16= 0.10

Ratio of moles                                1                         2.5

Thus the empirical formula of the compound is PO3

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Answer:

+1

Explanation:

Electrochemistry. In oxidation–reduction (redox) reactions, electrons are transferred from one A redox reaction is balanced when the number of electrons lost by the reductant Hg(l)∣Hg2Cl2(s)∣Cl−(aq) ∥ Cd2+(aq)∣Cd(s).

As is evident from the Stock number, mercury has an oxidation state of +1. This makes sense, as chlorine usually has an oxidation state of -1.

The  oxidation state of Hg in Hg₂Cl₂ compound is +1 as both subscripts of elements are eliminated.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

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Because the molecules are more closely spaced, the solid occupies less space than the same substance when it is in a gaseous state.

Answer: the distribution of electrons in the orbitals of its atoms

Explanation:

The electron configuration of an element describes _____. Multiple choice question.

the relationship between the nucleus of an atom and its electrons

the types of electronic energy levels that exist within an atom

the subatomic particles contained within an atom of the element

the distribution of electrons in the orbitals of its atomstal

Element 16 i sulfur

As element 16, it has 16 protons

The neutral atom then also has 16 electrons.

the electrons are b the 1s orbital      2e

                                      2s orbital     2e

                                      2p orbitals   6e

                                      3s orbital     2e

                                      3p orbitals   4e

(note 4 electrons in the 3p orbitals means 4 electrons in the "p" shaped orbitals at the 3rd energy level from the nucleus.

The electronic configuration for sulfur is written as

1s2 2s2 2p6 3s2 3p4

and can be obtained from a proper reading of the periodic table

The symbol for the ion electronic structure 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 5s^2 with an atomic number of 50 is Sn (Tin).

EXPLANATION: The symbol for the ion electronic structure with an atomic number of 50 and the following configuration 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰5s² is Sn. Therefore, the symbol for the ion electronic structure with an atomic number of 50 and the following configuration 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰5s² is Sn.What is electronic structure?An electronic structure describes how the electrons of an atom are distributed among the shells and sub-shells in the ground state. The electronic structure of atoms is divided into shells and sub-shells, where shells are the outermost part of an atom and sub-shells are the inner part of an atom.The electronic structure of atoms is vital in chemistry because it determines how atoms interact with each other, as well as how they form bonds to make molecules. Therefore, understanding electronic structures is essential in order to grasp and understand chemistry.

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According to the electron sea model, the melting points of metals are not as extreme as the boiling points. Therefore, the given statement is correct is true.

The Electron Sea Model's whole hypothesis relies around the behavior of atoms throughout this bonding. The movement of unpaired electrons between positively charged metal ions in a mesh is known as metallic bonding.

According to the electron sea model, the melting points of metals are not as extreme as the boiling points. This is because the cations and electrons are - in a metal. It does not take much energy for a solid to become liquid. But metallic bonds are very - , so it does require a lot of energy to separate atoms from the cations in their sea of electrons. This statement is true.

Therefore, the given statement is correct is true.

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Answer:

About 7.109g

Explanation:

25000mL is the same as 25 liters.

\(PV=nRT \\\\0.5 (25)=n (0.0821) (300) \\\\n\approx 0.508\)

Multiplying this by the molar mass of nitrogen, you get about 7.109 grams of nitrogen. Hope this helps!

Answer:

A molecule's shape strongly affects its physical properties and the way it interacts with other molecules, and plays an important role in the way that biological molecules (proteins, enzymes, DNA, etc.) interact with each other.

Explanation:

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, by rotation of molecule or bond , we can change the shape of molecule.

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

An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.

The compound that is ionic in nature can be dissociated very easily in water. Since ionic compounds are polar in nature, they readily dissolve in water. To change the shape of your molecular models without breaking any of the covalent bonds is by rotating the molecule or a bond.

Therefore, by rotation of molecule or bond , we can change the shape of molecule.

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your answer would be sound energy

Explanation:

my brain

Secondary consumers are organisms that primarily feed on herbivores or other primary consumers.

They occupy the next trophic level above the primary consumers in a food web. They obtain energy by consuming the primary consumers and play an important role in regulating the population of herbivores.

Examples of commonly observed secondary consumers include:

Carnivorous mammals: Animals such as wolves, lions, and tigers that feed on herbivores like deer, zebras, or gazelles.

Birds of prey: Species like eagles, hawks, and owls that consume small mammals, reptiles, or other birds.

Carnivorous fish: Fish like pike, barracuda, or bass that prey on smaller fish or aquatic invertebrates.

Predatory insects: Insects such as spiders, mantises, or dragonflies that feed on other insects, including herbivorous insects.

In a specific food web, the identification of secondary consumers would depend on the specific organisms present and their feeding interactions. It would be necessary to analyze the trophic relationships among the organisms in the food web to determine the secondary consumers accurately.

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Answer:

d. the ratio and size of the compound's ions

Explanation: The crystal structure of an ionic compound depends on the sizes of the cations and anions.  and  ratio of cations to anions.

HOPE THAT HELPS

Answer:

thermal and light energy