What part of a nuclear reactor slows down chain reactions?
steam turbines
electricity generator
control rods
neutron blaster

Answer:

False

Explanation:

Answer:

False

Explanation:

In Atlanta, GA, certain seasons are associated with poorer air quality due to various factors such as weather conditions, human activities, and geographical location.

Typically, the seasons with the worst AQI in Atlanta, GA, are summer and early fall. This is primarily due to the combination of high temperatures, stagnant air masses, and increased pollution from various sources.

During the summer months, Atlanta experiences hot and humid weather, which can contribute to the formation of ground-level ozone. Ozone is a harmful pollutant that is created when pollutants from vehicles, power plants, and industrial activities react with sunlight and heat. High levels of ozone can cause respiratory issues and other health problems.

In addition to ozone, Atlanta also experiences increased levels of particulate matter (PM) during the summer and early fall. PM refers to tiny particles suspended in the air, which can come from sources such as vehicle exhaust, industrial emissions, and wildfires.

These particles can be inhaled into the lungs and can have detrimental effects on respiratory health.

It's important to note that air quality can vary from year to year and is influenced by various factors. Local regulations, weather patterns, and changes in pollutant emissions can all impact the AQI during different seasons.

Monitoring air quality reports and taking necessary precautions such as reducing outdoor activities during times of poor air quality can help individuals stay informed and protect their health.

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The mole fractions of each species at equilibrium are 0.25 for A and D, 0.5 for B, and 0.225 for C.

we can use the principles of chemical equilibrium and the mole fraction formula.

First, we need to write the balanced chemical equation for the reaction involving A, B, C, and D. Let's assume that the reaction is:

A + 2B <=> C + D

where A, B, C, and D are the chemical species, and the coefficients indicate their stoichiometric ratios.

Next, we need to write the expression for the equilibrium constant, Kc, for this reaction:

Kc = [C][D] / [A][B]²

where [X] denotes the molar concentration of species X at equilibrium.

Since we know the initial moles of A, B, and D, we can calculate their total moles in the mixture:

Total moles = 1 mol A + 2 mol B + 1 mol D = 4 mol

We also know that the final mixture contains 0.9 mol of C. Therefore, the molar concentration of C at equilibrium is:

[C] = 0.9 mol / 4 L = 0.225 M

Since we have only one unknown, we can use the equilibrium constant expression to calculate the molar concentration of D:

Kc = [C][D] / [A][B]²

0.9 = (0.225)(D) / (1)(2²)

D = 1.8

Therefore, the molar concentration of D at equilibrium is 1.8 M.

Using the law of conservation of mass, we can also calculate the molar concentration of A and B at equilibrium:

[A] = 1 mol / 4 L = 0.25 M

[B] = 2 mol / 4 L = 0.5 M

Mole fraction of X = moles of X / total moles

Mole fraction of A = 1 mol / 4 mol = 0.25

Mole fraction of B = 2 mol / 4 mol = 0.5

Mole fraction of C = 0.9 mol / 4 mol = 0.225

Mole fraction of D = 1 mol / 4 mol = 0.25

Therefore, the mole fractions of each species at equilibrium are 0.25 for A and D, 0.5 for B, and 0.225 for C.

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The type of movement that occurs in the plate movement listed above include the following:

These are gigantic pieces of the Earth's crust and uppermost mantle and are made up of oceanic crust and continental crust.

A convergent boundary as the name implies occurs when lithospheric plates are moving towards one another.

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The enthalpy change for the reaction \(C2H4(g) + H2(g) → C2H6(g)\) is -137.15 kJ/mol.

Given:C2H4(g) + H2(g) → C2H6(g)The enthalpy of formation of C2H6(g) is -84.68 kJ mol-1The enthalpy of formation of C2H4(g) is 52.47 kJ mol-1The enthalpy of formation of H2(g) is 0 kJ mol-1Hence, using Hess's Law, the enthalpy change for the reaction \(C2H4(g) + H2(g) → C2H6(g)\) can be calculated by considering the formation of reactants and products from their respective elements. It can be given as:

\($$C_2H_4 + H_2 → C_2H_6$$$$\Delta H = H_f(C_2H_6) - [H_f(C_2H_4) + H_f(H_2)]$$$$\Delta H = -84.68 - [52.47 + 0]$$$$\Delta H = -84.68 - 52.47$$$$\Delta H = -137.15 kJ/mol$$.\)

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The balanced equation of the reaction is option d. The  limiting reactant here is KBr and excess reactant is calcium nitrate. The percent yield of the reaction is 93 %.

The limiting reactant in a reaction is the reactant which is fewer in amount and as soon it is consumed, the reaction stops. For the given reaction, option d is the balanced chemical equation.

One mole of calcium nitrate requires 2 moles of KBr.

molar mass of calcium nitrate = 164 g/mol

no.of moles in 75 g = 75/164 = 0.457

molar mass of KBr = 118.9 g/mol

no.of moles 95 g = 95/118.9 = 0.798

0.457 moles of calcium nitrate needs its twice amount that is 0.9 moles of KBr. Hence, KBr is the limiting reactant and calcium nitrate is excess reactant here.

2 moles or 237.8 g of KBr gives 2 moles or 202 g of potassium nitrate. Then, 95 g of KBr will gives:

(95×202)/237.6 = 81.3 g

actual yield = 75.75 g

then percent yield  = 75.75 /81.3 × 100 = 93 %.

0.79 moles of KBr needs its half or 0.399 moles of calcium nitrate. But we have 0.45 moles. Thus, excess amount is

(0.45 - 0.399) × 164 g/mol = 9.5 g.

Therefore, the 9.5 g of excess reactant will be left over.

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Answer:

Answer would be A, Muscles move your bones

Explanation:

Without the Muscular System, your bones would not be connected properly

Answer:

increases reaction rates

Explanation:

Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.

Answer:

0.0878 moles CaCl₂

Explanation:

To find the amount of moles of CaCl₂, you need to

(1) convert the volume from mL to L (1,000 mL = 1 L)

(2) calculate the amount of moles (M = moles / L)

It is important to arrange the conversions in a way that allows for the cancellation of units.

(Step 1)
   

  42 mL CaCl₂                    1 L
------------------------  x  ----------------------  =  0.042 L CaCl₂
                                       1,000 mL

(Step 2)

Molarity (M) = moles / volume (L)                <----- Molarity ratio

2.09 M = moles / 0.042 L                            <----- Insert values

0.0878 = moles                                           <----- Multiply both sides by 0.042 L

Answer:

BBBBBBBB ITS B

Explanation:

Answer:

A reaction that converts a saturated acid into an unsaturated acid is called hydrogenation.

Explanation:

Answer:

succinate dehydrogenase

Explanation:

Answer:

1. Because a Francium atom is deeper down the alkali metals, it is much easier to lose a valence electron.

2. A fluorine atom can easily gain a valence electron, but it could not easily lose a valence electron because it is one electron away from filling the outer shell

Explanation:

The answer is the explanation

7.11 × 10⁻⁴ is the solubility (in M) of PbCl\(_2\) in a 0.15 M solution of HCl. The Ksp of PbCl\(_2\) is 1.6 x 10⁻⁵.

The capability of a material, the solute, to combine with another material, the solvent, is known as solubility in chemistry. Insolubility, or the solute's inability to create such a solution, is the opposite attribute.

The amount of each of the solute within a saturated solution—a solution whereby no more solute is able to be dissolved—is typically used to gauge the degree of a substance's solubility in a particular solvent.

PbCl\(_2\) ⇌ Pb\(_2\)⁺(x) + 2Cl⁻ (2x)

HCl ⇌H⁺ (0.15M) + Cl⁻ (0.15M)

Ksp = {Pb\(_2\)⁺} {Cl⁻}²

Ksp = {x} {2x+ 0.15}²

2x<0.15

Ksp = {x} {0.15}²

x = 7.11 × 10⁻⁴

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Among the following, an acceptable IUPAC name for the compound is (C) 2-bromo-5-chlorobenzaldehyde.

The IUPAC nomenclature for substituted aromatic compounds requires that the name of the substituent be added as a prefix to the name of the aromatic compound. Nitrobenzene is the term given to the compound that results when a benzene ring is joined to a single nitro group, while chlorobenzene is the term given to the compound that results when chlorine is attached to the benzene ring.

        2-bromo-5-chlorobenzaldehyde

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Answer:

Expansion: increase in size Contraction: decrease in size

Explanation:

The increase in size of an object on heating is called expansion where as the decrease in size of an object on cooling is called contraction.

Answer: Its A or D                                                        

wish i had an actual answer sorry..  

The correct answer should be A

The change in the velocity = 4 m/s

Acceleration = 4 m/s²

Given

vo = initial velocity = 4 m/s

vf = final velocity = 8 m/s

t = 1 s

Required

The change in the velocity

Acceleration

Solution

the change in velocity =

\(\tt vf-vo=8-4=4~m/s\)

Acceleration = ratio of a change in velocity and the time

\(\tt a=\dfrac{\Delta v}{t}= \dfrac{vf-vo}{t}\)

Input the value :

\(\tt a=\dfrac{4~m/s}{1~s}=4~m/s^2\)

Answer:

The principal quantum number for the outermost electrons in a Cl atom in the ground state is 3.

Explanation:

By using the Pauling distribution the chlorine atom has an electronic set of \(3s1^{2}\)

With n=3 for an orbital S, l = 0 , ml = 0 and ms = ± 1/2

Therefore the final answer is 3

Answer:

985.2 moles of nitrogen can produce 1970.4 moles of ammonia.

Explanation:

The balanced chemical equation for the production of ammonia from nitrogen is:

N2 + 3H2 → 2NH3

From the balanced equation, we can see that 1 mole of nitrogen reacts with 3 moles of hydrogen to produce 2 moles of ammonia.

So, to determine how many moles of ammonia can be produced from 985.2 moles of nitrogen, we need to use the mole ratio from the balanced chemical equation as follows:

985.2 moles N2 x (2 moles NH3 / 1 mole N2) = 1970.4 moles NH3

Therefore, 985.2 moles of nitrogen can produce 1970.4 moles of ammonia.

Answer:

66 grams of ice would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C.

Explanation:

To calculate the amount of ice that would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C, we need to use the formula:

Q = m_water * c_water * ΔT_water + m_ice * Lf

where,
Q = the amount of heat transferred,
m_water = the mass of water, c_water is the specific heat capacity of water,
ΔT_water = the change in temperature of water, m_ice = the mass of ice,
Lf = the specific latent heat of fusion of ice.

First, let's calculate the amount of heat transferred to the water:

Q = m_water * c_water * ΔT_water
Q = 352 g * 1.0 cal/(g*°C) * (15-0) °C
Q = 5,280 cal

Next, we can use the specific latent heat of fusion of ice, which is 80 cal/g, to calculate the amount of heat required to melt the ice:

Q = m_ice * Lf
Q = m_ice * 80 cal/g
m_ice = Q / Lf
m_ice = 5,280 cal / 80 cal/g
m_ice = 66 g

According to the electronic configuration, sodium is  an atom that loses one electron when it reacts with another atom.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule.

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Answer:

Explanation:

Answer:

B. Mass

Explanation:

Matter is all the “stuff” that exists in the universe. It has both mass and volume. · Mass measures the amount of matter in a substance or an object.

hope i helped

Answer:

The answer to your question is B

Thermodynamics is the study of science that deals with the relation and movement of heat, work, temperature, and energy. Thus, option B is correct.

Thermodynamics is the science that deals with the relation and the flow of heat and energy concerning entropy and enthalpy of matter. According to the laws of thermodynamics, the energy or the heat of the substances or the system cannot be formed through new reactions nor they can be destroyed.

The second law states about the spontaneous and non-spontaneous reactions and their relation to entropy and enthalpy of the reaction. In the third law, for a pure substance, the entropy reaches zero with the temperature also approaching zero.

Therefore, thermodynamics deals with the flow of heat and energy.

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Answer:

Preventing erosion – Land Reclamation

Protecting nesting areas – Protecting Biodiversity

Preventing littering – Land Reclamation

Preventing habitat disruption – Protecting Biodiversity

Protecting native species – Protecting Biodiversity

Preventing contamination of soil – Land Reclamation

Explanation:

I really hope I'm right! I tried my hardest, please give me brainliest :)

have a good day!

The solubility of many substances increases with temperature, there are exceptions. Some substances exhibit a decrease in solubility with temperature due to specific interactions or changes in solute-solvent interactions at higher temperatures.

The increase in solubility of many substances with temperature can be attributed to the effect of temperature on the kinetic energy and intermolecular interactions of molecules.

On a microscopic scale, an increase in temperature corresponds to an increase in the kinetic energy of molecules. As the kinetic energy increases, the molecules move more rapidly and collide with each other and with the solvent molecules more frequently and with greater force.

These increased collisions and kinetic energy result in enhanced molecular interactions and overcome the forces holding the solute particles together. This increased energy disrupts the intermolecular forces within the solute, allowing the solvent molecules to surround and interact more effectively with the solute particles, leading to greater solubility.

Additionally, an increase in temperature can cause solvent molecules to move more freely, reducing their cohesion and allowing them to interact more readily with solute particles.

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The intermolecular force present in butter is London dispersion forces. In kerosene, covalent bonding between carbon and hydrogen atoms are present.

Intermolecular forces are force exerted between two molecules which can be of attraction or repulsion. The intermolecular force of attraction make the atoms binded in a compound or molecule.

In butter, the hydrocarbon molecules exerts a London dispersion forces between two non-polar molecules. In kerosene, the hydrocarbon molecules are bound by covalent bonding between carbon atoms.

In ethanol, the OH group make it possible to form hydrogen bonds between ethanol molecules. In the case of calcium fluoride, dipole, dipole forces exists. Since the compound is ionic and have a permanent dipole moment.

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Element Si, Ge, Sn, Pb have similar properties to carbon.

Reasons:

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Answer: 6.23

Explanation:

1) solve for pH  

pH=-log (H3O+) = - log 1.7 X 10^-8 =7.77

2) now do 14-pH  = 14 -7.77=6.23

Answer:

179 K

Explanation:

From the question given above, the following data were:

Initial pressure (P₁) = 1480 mm Hg

Initial temperature (T₁) = 478 K

Final pressure (P₂) = 555 mm Hg

Final temperature (T₂) =?

The final temperature of the gas can be obtained as follow:

P₁/T₁ = P₂/T₂

1480 / 478 = 555 / T₂

Cross multiply

1480 × T₂ = 478 × 555

1480 × T₂ = 265290

Divide both side by 1480

T₂ = 265290 / 1480

T₂ ≈ 179 K

Therefore, the final temperature of the gas is 179 K