The spontaneous disintegration (breaking down) of a nucleus into slightly
lighter and more stable nucleus describes
A.nuclear fusion
B. nuclear fission
C. radioactive decay
D. nuclear radiation

Answer:

2Mg+O=2MgO

Explanation:

32gram of reacting

The equilibrium vapor pressure with respect to water (eow) is 259.9 Pa. assume that saturation vapor pressure is same as equilibrium vapor pressure.

Therefore, the RH at the frost point is  

RH = (eow / saturation vapor pressure) × 100

= (259.9 Pa / 259.9 Pa) × 100

= 100%

b) At T = -11 °C, we need to compare the equilibrium vapor pressure with respect to water (eow) and the equilibrium vapor pressure with respect to ice (coi) to determine if ice particles will form. From the given table, at T = -11 °C, the equilibrium vapor pressure with respect to water (eow) is 237.7 Pa, and the equilibrium vapor pressure with respect to ice (coi) is 165.3 Pa.

The air is supersaturated with respect to ice, and the presence of Kaolinite particles can provide surfaces for water droplets to condense onto, leading to the formation of ice particles.

c) At T = -12 °C, we compare the equilibrium vapor pressure with respect to water (eow) and the equilibrium vapor pressure with respect to ice (coi). From the given table, at T = -12 °C, the equilibrium vapor pressure with respect to water (eow) is 217.3 Pa, and the equilibrium vapor pressure with respect to ice (coi) is 181.2 Pa.

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As heat is added to the solid sample of hexane at -95°C, its potential energy increases. This causes the bonds between the molecules to weaken and eventually break, leading to a transition from a solid to a liquid state. The potential energy continues to increase until the hexane is completely melted.

This refers to the energy of a molecule as a result of the positions of its nuclei, r. This energy of a system of two atoms is based on the distance between them. At large distances the energy is zero, which means “no interaction”.

potential energy of the molecules is calculated using the formula:

P.e = mgh

Where,

P.e =  potential energy

m = mass

g = Gravitational force

h= height

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Answer:

I need points for my Ap Calculs class

Explanation:

bsbsjsjsjd

Answer:

pink ;)

Explanation:

the.alyssayork

Answer:

it allows us to determine what substances will float and what substances will sink when placed in a liquid.

The IUPAC name for a binary covalent compound will lack roman numerals.

Binary covalent compound comprises of two elements which forms a

compound through the sharing of electrons.

The sharing of electrons is referred to as covalent bonding and naming such

compounds require prefixes such as mono-, di- , tri- etc.

The standard method of naming these compounds should be with the

prefixes and not with the roman numerals.

An example is carbon(IV)oxide which is wrong in  IUPAC naming.

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Answer:

B

Explanation:

Just did the test on edge 2021

Answer: Yes.

Explanation:

the number of protons in the nucleus determines an element's identity. Chemical changes do not affect the nucleus, so chemical changes cannot change one type of atom into another. The number of protons in a nucleus does change sometimes, however. The identity of the atom, therefore, changes.

The pH of a 205 ml sample is 1.58.

Balanced chemical eqation for benzoic acid release proton in water:

C₆H₅COOH(aq) ⇄ C₆H₅COO⁻(aq) + H⁺(aq)

V(C₆H₅COOH) = 205 mL; volume of benzoic acid

c(C₆H₅COOH) = 2.668 M; concentration of benzoic acid

Ka = 6.4 x 10-5; acid constant of benzoic acid

c(C₆H₅COO⁻) = c(H⁺) = x; unknown concentration

Ka = (c(C₆H₅COO⁻) x c(H⁺)) / c(C₆H₅COOH)

6.4 x 10-5 = x² / 2.668 M - x

x² + (6.4 x 10-5)x - 1.7 x 10⁻⁴ = 0

Solve for x, using quadratic formula:

x = c(H⁺) = 0.026 M

pH = -logc(H⁺)

pH = -log0.026

pH = 1.58

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Answer:

Answer Choice D

Explanation:

Study Island Question

Germanium (Ge) with a charge of -4

Restriction of potassium electrolytes is recommended in the management of high blood pressure.

High blood pressure

a condition when the blood exerts too much pressure on the arterial walls.

Blood pressure beyond 140/90 is typically regarded as hypertension; blood pressure above 180/120 is regarded as severe hypertension.

Many times, high blood pressure goes unnoticed. If left untreated, it can eventually lead to illnesses like heart disease and stroke.

Blood pressure can be lowered by eating a less salty diet, moving frequently, and using drugs.

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Answer:

I believe it would be a solution I could be wrong tho

Explanation:

Answer:

a solution

Homogeneous mixtures (solutions)

Explanation:

Lemonade is a special type of mixture called a solution.

...................................................................................................................................................

What type of mixture is made by thoroughly mixing powdered lemonade with water?

Homogeneous mixtures (solutions)

Mixtures with substances dissolved evenly into one another, like pink lemonade powder dissolved in water, are called homogeneous mixtures, or solutions.

The final temperature of the gas is approximately 40.96 Kelvin.

To determine the final temperature of the gas, we can use the ideal gas law, which states:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles of the gas, R is the ideal gas constant, and T is the temperature in Kelvin.

First, let's convert the given temperatures to Kelvin. We have:

Initial temperature: -125 degrees Celsius = 148 K (approximate)

Final temperature: Unknown

The initial conditions of the gas are as follows:

Initial pressure (P1) = 1.25 atm

Initial volume (V1) = 1250 mL = 1.25 L (since 1 L = 1000 mL)

Initial temperature (T1) = 148 K

The final conditions of the gas are as follows:

Final pressure (P2) = 50.0 atm

Final volume (V2) = 325 mL = 0.325 L

Final temperature (T2) = Unknown

Using the ideal gas law, we can set up the following equation:

(P1 * V1) / T1 = (P2 * V2) / T2

Substituting the known values:

(1.25 atm * 1.25 L) / 148 K = (50.0 atm * 0.325 L) / T2

Simplifying the equation:

T2 = (50.0 atm * 0.325 L * 148 K) / (1.25 atm * 1.25 L)

T2 = 40.96 K

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Answer:

Sodium chloride is ionically bonded. An electron has transferred from sodium to chlorine. Sodium has an electronegativity of 1.0, and chlorine has an electronegativity of 3.0.

...

The electronegativity difference between sodium and chlorine is 2.23 and the type of bond is ionic bond.

The tendency of an atom in a molecule to attract the shared pair of electrons towards itself is known as electronegativity.

Electronegativity is a kind of measure that tells how strongly atoms attract the bonding electrons to them.

Its symbol is a Greek letter that looks like an (X). It is directly proportional to the atom’s attraction for the electrons.

The compounds which form between the elements having a huge difference in the electronegativity are ionic compounds, and also have ionic bonding.

Electronegativity of Sodium = 0.93

Electronegativity of chlorine = 3.16

Difference = 2.23

The type of bond between them is ionic bond.

Therefore, The electronegativity difference between sodium and chlorine is 2.23 and the type of bond is ionic bond.

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A system of linear equations to balance the following chemical reaction:

Limestone, CaCO₃, neutralizes the acid, H₃ O, in acid rain is:

2H₃O + CaCO₃ → 3H₂O + Ca + CO₂

To balance the chemical equation:

H₃O + CaCO₃ → H₂O + Ca + CO₂

We need to ensure that the number of atoms of each element is the same on both sides of the equation.

Let's assign variables to the coefficients of each compound:

H₃O: x

CaCO₃: y

H₂O: z

Ca: a

CO₂: b

Now, we can set up the system of equations based on the number of atoms for each element:

For hydrogen (H):

3x = 2z

For oxygen (O):

3x + 3y = 2z

For calcium (Ca):

y = a

For carbon (C):

y = b

For calcium (Ca):

a = 1

Solving this system of equations will give us the balanced coefficients. Let's solve it:

From the equation y = a, we have y = 1.

From the equation y = b, we have b = 1.

Substituting b = 1 into the equation 3x + 3y = 2z, we have:

3x + 3 = 2z

From the equation 3x = 2z, we have x = (2/3)z.

Substituting x = (2/3)z into the equation 3x = 2z, we have:

3(2/3)z = 2z

2z = 2z

This equation is true for any value of z, indicating that z can take any value.

Therefore, we can choose z = 3 to simplify the coefficients:

x = (2/3)z = (2/3)(3) = 2

y = 1

z = 3

a = 1

b = 1

Thus, the balanced equation is:

2H₃O + CaCO₃ → 3H₂O + Ca + CO₂

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Oganesson is a synthetic chemical element with the symbol Og and atomic number 118

Oganesson (Og), a transuranium element that occupies position 118 in the periodic table and is one of the noble gases.

A very radioactive metal that has only ever produced a small number of atoms. It is currently only utilised for research. It plays no recognised biological function.

A chemical element is a species of atoms, including the pure substance made entirely of that species, that have a specific number of protons in their nuclei. Chemical elements, unlike chemical compounds, cannot be reduced by any chemical reaction into simpler molecules.

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Answer:

D

Explanation:

Cuz i got it wrong and this was the right answer : )

The best reaction  that would possibly make a good  airbag inflator is the reaction in which CO2 is produced.

An airbag refers to certain objects that are put into vehicles to ensure that the occupants of the vehicle do not bump against objects that are within or outside the vehicle when there is a collision.

Since a good airbag must contain substances that quickly react to produce a non-combustible gas that fills up the airbag in order to cushion the effect of a collision, the best reaction that would possibly make a good  airbag inflator is the reaction in which CO2 is produced.

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Molecular oxygen is composed of two oxygen atoms that share four electrons. molecular oxygen is composed of two oxygen atoms that share four electrons, which results in the formation of two covalent bonds between the atoms.

How many covalent bonds exist between the two oxygen atoms? Molecular oxygen has the chemical formula O2. The two oxygen atoms in the molecule share four electrons, forming two covalent bonds between them. Covalent bonds are formed when two atoms share electrons in order to attain a full outer shell of electrons. This is known as the octet rule.

The two oxygen atoms in molecular oxygen each have six electrons in their outermost shell. This is one less than the stable noble gas configuration, which has eight electrons in the outermost shell. By sharing two electrons with each other, they both achieve a stable configuration with eight electrons in their outermost shell. This sharing of electrons is what forms the covalent bonds between the two oxygen atoms. Each oxygen atom contributes two electrons to the bond, for a total of four electrons shared between them. In summary, molecular oxygen is composed of two oxygen atoms that share four electrons, which results in the formation of two covalent bonds between the atoms.

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Answer:

Beryllium-8 (8Be, Be-8) is a radionuclide with 4 neutrons and 4 protons. It is an unbound resonance and nominally an isotope of beryllium. It decays into two alpha particles with a half-life on the order of 10−16 seconds; this has important ramifications in stellar nucleosynthesis as it creates a bottleneck in the creation of heavier chemical elements. The properties of 8Be have also led to speculation on the fine tuning of the Universe, and theoretical investigations on cosmological evolution had 8Be been stable.

Explanation:

The moles of gas in the bottle has been 0.021 mol.

The ideal gas has been given as the gas where there has been negligible amount of interatomic collisions. The ideal gas equation has been given as:

\(PV=nRT\)

The given gas has standard pressure, \(P=1\rm atm\)

The volume of the gas has been, \(V= 0. 500 \;\rm L\)

The temperature of the gas has been, \(T=15^\circ \text C\\ T=288\;\rm K\)

Substituting the values for the moles of gas, n:

\(\rm 1\;\times\; 0. 500 =\textit n\;\times\;0.08214\;atm.L/mol.K\;\times\;288\;K\\\\ \textit n=\dfrac{0. 500}{0.08214\;\times\;288} \;mol\\\\ \textit n=0.021\;mol\)

The moles of gas in the bottle has been 0.021 mol.

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Answer:

A) Alkaline Earth Metals

Explanation:

Area Marked A would be Alkali Metals

Area Marked B would be Alkaline Earth Metals

Area Marked C would be Transition Metals

Area marked H would be Halogens

Soil bacteria convert atmospheric nitrogen into ammonia, nitrites, and then nitrates. This nitrates are then absorbed by producers.

Nitrogen fixation is a process that converts atmospheric nitrogen (N2), into available forms such as ammonia, nitrates, or nitrites to plants so that the plant can absorb it and make amino acids so we can conclude that Soil bacteria convert atmospheric nitrogen into ammonia, nitrites, and then nitrates. This nitrates are then absorbed by producers.

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Answer:

Of what?

Explanation:

But uhh: An acid is a substance that donates protons or accepts a pair of valence electrons to form a bond. Bases can be thought of as the chemical opposite of acids.

Answer: Data

Explanation:

The answer is data because data is important pieces of evidence that is collected in a table or a graph.

Answer:

B. Data

Explanation:

Cuz is said so duh

Answer:  3597 kJ of heat

Explanation:

According to ideal gas equation:

\(PV=nRT\)

P = pressure of gas = 5.00 atm

V = Volume of gas = 8.00 L

n = number of moles = ?

R = gas constant =\(0.0821Latm/Kmol\)

T =temperature =\(25.0^0C=(25.0+273)K=298K\)

\(n=\frac{PV}{RT}\)

\(n=\frac{5.00atm\times 8.00L}{0.0821 L atm/K mol\times 298K}=1.63moles\)

As it is given :

1 mole of propane produces = 2220 kJ of heat

Thus 1.63 moles of propane produces = \(\frac{2200}{1}\times 1.63=3597kJ\)

Thus 3597 kJ of heat is produced

Assuming there are no other changes to the system, the change in internal energy is 0 joules.

This is because the internal energy of a system is a measure of the total amount of energy stored within the system. If there are no changes to the system, then the amount of energy stored in the system remains the same and thus the change in internal energy is 0 joules.

Is a unit of measurement used to determine the total amount of energy stored within a system. This amount of energy varies depending on the work done in the system, as well as the transferred between the system and its environment. When dealing with a closed system, i.e., a system that is not affected by any external change, the change in internal energy is zero.

This is because in a closed system, there is no work done and no heat transferred to the system. This means that the total amount of energy stored within the system does not change, so the change in internal energy is zero.

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Answer:

Nvr XD

Explanation:

Answer:

the world may never know

Explanation:

The substance based on the intermolecular forces present in that substance are;

HF: Hydrogen fluoride (HF) is a polar molecule that forms hydrogen bonds. Thus, the intermolecular forces present in HF are hydrogen bonding and dipole-dipole interactions.

HCl: Hydrogen chloride (HCl) is also a polar molecule that forms dipole-dipole interactions but does not have hydrogen bonding because hydrogen in HCl is not bonded to highly electronegative elements.

CO: Carbon monoxide (CO) is a nonpolar molecule and exhibits only weak dispersion forces (London forces) because it has no permanent dipole moment.

CO₂ molecule has no permanent dipole moment and exhibits only weak dispersion forces.

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Answer:

Coductivity

Explanation:

Because heat conducts to them!