molarity is a measure of . select all answers that apply. select all that apply: the concentration of a solute in a solution. the concentration of a solution in a solute. the number of moles of solute dissolved per liter of solution. the amount of solution needed for a specific solute.

Answer:

When an atom loses an electron it becomes ionized

Answer:

Cookies N Cream

Explanation:

Its The

At 30°C, the reaction's activation energy is decreased by \(\frac{9.7 kJ}{mol}\) by the addition of a catalyst if the catalyst triples the reaction rate.

This can be determined using the Arrhenius equation, which relates the rate constant (k) of a reaction to its activation energy (Ea), the temperature (T), and the gas constant (R):
k = A e^\((\frac{-Ea}{RT})\)
Where A is the pre-exponential factor and e is the base of the natural logarithm.
If the catalyst triples the reaction rate, then the rate constant with the catalyst (k') is three times the rate constant without the catalyst (k):
k' = 3k
Substituting the Arrhenius equation for both k and k' gives:
A e^\((\frac{-Ea}{RT})\) = 3A e^\((\frac{-Ea}{RT})\)
Dividing both sides by A and rearranging gives:
e^\((\frac{-Ea}{RT})\) / e^\((\frac{-Ea}{RT})\) = 3
Taking the natural logarithm of both sides gives:
\((\frac{-Ea}{RT})\) + \((\frac{Ea}{RT})\) = ln(3)
Solving for Ea' gives:
Ea' = Ea - RT ln(3)
Plugging in the values for R (\(\frac{8.314 J}{mol K}\)) and T (303 K) gives:
Ea' = Ea - (\(\frac{8.314 J}{mol K}\))(303 K) ln(3)
Ea' = Ea - \(\frac{9703 J}{mol}\)
Ea' = Ea - \(\frac{9.7 kJ}{mol}\)
Therefore, the activation energy is decreased by \(\frac{9.7 kJ}{mol}\) by the addition of the catalyst.

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Answer:

D is the correct option.

Explanation:

A seismograph detects seismic waves which travel through the Earth, that is mainly rock(taking from the options given)

Answer:

It is just rock!

Explanation:

Answer:

oxidation, synthesis, polymerization.

To determine the chloride ion (Cl-) concentration in milligrams per liter (mg/L) of ground water, we need to calculate the moles of chloride ions and then convert it to the desired concentration units.

Given:

Volume of ground water sample = 100 mL = 0.1 L

Mass of precipitate (AgCl) = 60.0 mg

The molar mass of AgCl is calculated as follows:

Ag: 1 atom x 107.87 g/mol = 107.87 g/mol

Cl: 1 atom x 35.45 g/mol = 35.45 g/mol

Total molar mass of AgCl: 107.87 g/mol + 35.45 g/mol = 143.32 g/mol

Now, let's calculate the moles of chloride ions (Cl-):

moles of AgCl = mass of AgCl / molar mass of AgCl

             = 60.0 mg / 143.32 g/mol

             = 0.4183 mmol

Since AgCl precipitates when all the chloride ions react with AgNO3, the moles of chloride ions are equivalent to the moles of AgCl formed.

To convert the moles of chloride ions to milligrams per liter (mg/L):

Chloride ion concentration = (moles of Cl- / volume of water sample) x 1000

                         = (0.4183 mmol / 0.1 L) x 1000

                         = 4183 mg/L

Therefore, the chloride ion concentration in milligrams per liter (mg/L) of the ground water sample is approximately 4183 mg/L.

By adding an excess of AgNO3 solution to precipitate all the chloride ions as AgCl and measuring the mass of the resulting precipitate, we can determine the chloride ion concentration in milligrams per liter (mg/L) of the ground water sample. In this case, the chloride ion concentration is found to be approximately 4183 mg/L.

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First, we define density as:

Density = mass/volume;

We focus first on the volume of air in the room.

Volume:

We have the measurements of where the air is.

We calculate the volume with these measurements, but first, we change the units to L:

1 inch = 2.54 cm

1 L = 10^3 cm^3

1 ft = 12 inch

Now,

11.0 ft x (12 in/1 ft) x (2.54 cm/1 in) = 335.28 cm

12.0 ft = 365.76 cm

10.0 ft = 304.8 cm

Therefore, the volume of the room = 335.28 cm x 365.76 cm x 304.8 cm

Volume = 37378237.5 cm^3 x (1 L/10^3cm^3) = 374 x 10^2 L

From the Density equation, we clear the mass:

Density x volume = mass (g)

1.19 g/L x 374x10^2 L = 445x10^2 g x (1 kg/1000 g) = 44.5 kg

Answer: 44.5 kg

Answer:

A because density DOES have a unit

Explanation:

The pressure of the oxygen in the air is 0.21 atm. The partial pressure of a gas is the contribution that gas makes to the total pressure when the gas is part of a mixture.

Answer:

Observation

Explanation:

In chemistry a chemist conducts an experiment and he/she concludes some points and arranges information about his/her experiment can be called observation or result

Organizing information in a meaningful way is an example of good management and the proper establishment of the research parameters.

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Answer:

no because gas has the most kinetic energy

The attraction of a metallic cation for delocalized electrons is known as "metallic bonding".

This type of bonding occurs when the valence electrons of the metal atoms become delocalized and form a "sea of electrons" that all the metal cations are able to move around in. This movement of electrons allows the metal cations to have electrostatic interactions with each other, leading to strong bonding.

The attraction of a metallic cation for delocalized electrons is known as metallic bonding.Metallic bonding refers to the bonding between metallic atoms. The valence electrons of the metallic atoms, in this case, are free to move throughout the entire crystal, creating a “sea” of electrons.

The positively charged metallic ions are then held together by this sea of electrons. The attraction between the positively charged metal ions and the negatively charged electron sea is known as metallic bonding.In metallic bonding, the valence electrons are delocalized and shared between many atoms, resulting in strong bonds.

These electrons are free to move throughout the metal lattice, resulting in high electrical and thermal conductivity as well as malleability and ductility. Metals also have high melting and boiling points, which is also a result of the strong metallic bonds between the atoms.

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0.3 moles of Oxygen is excess reactant (reagent) when yield is 100% .

NO =5.6 moles

O2= 3.1 moles

2NO + O2 --> 2NO2 the chemical reaction.

the ratio of NO and O2 is 2:1

therefore for 5.6 moles of NO, 2.8 moles of Oxygen(O2) is required. So 3.1moles - 2.8 moles = 0.3 moles

The reactant in a chemical reaction that is present in a quantity that is larger than what is required to fully react with the limiting yield is known as the excess reactant. The substance(s) still present after a chemical reaction has reached equilibrium in yield are the reactant(s). Subtract the mass of excess reagent eaten from the total mass of excess reagent provided to determine the quantity of yield that is still present. Reactants in a chemical reaction are referred to as excess reagents if they are still present after the reaction is complete.

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Answer:

453.6/58/2=453.6/2.9=156.314 grains

The number of grains in a 453.6 g (1lb.) bag of rice is equal to 157 grains of rice.

The weight can be described as the force acting due to gravity. Weight can be considered as a vector quantity if the gravitational pull is acting on the body.

Therefore, in free fall, the weight of the object would be zero. Therefore, terrestrial objects can be weightless while ignoring air resistance.

The unit for measurement of weight is the same as of force, which is the newton. A body with a mass of 1 kilogram will exhibit a weight of about 9.8 Newton on the surface of the Earth, and about 1/6th as much weight on the Moon.

Given the weight of the 20 grains = 58 g

The weight of one grain = 58/20 = 2.9 g

The number of grains (n) of rice in weight 453.6 g of the bag of rice  can be calculated as:

n = 453.6/2.9

n = 156.4 ≈ 157

Therefore, the number of grains can be considered equal to 157 grains of rice.

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Answer:

c

your answer is correct

Answer:

neutrons is metal.......

Answer:

hey

Explanation:

Answer:

hi

Explanation:

UwU

The correct products of the reaction between potassium superoxide and water are potassium hydroxide (KOH) and oxygen gas (O₂).

When potassium superoxide (KO₂) reacts with water (H₂O), it primarily produces potassium hydroxide (KOH) and releases oxygen gas (O₂).

The balanced chemical equation for the reaction is:

2 KO₂(s) + 2 H₂O(l) → 2 KOH(aq) + H₂O₂(aq) + O₂(g)

In this reaction, each KO₂ molecule reacts with two water molecules. The potassium superoxide (KO₂) reacts with water to form potassium hydroxide (KOH) and hydrogen peroxide (H₂O₂). Additionally, oxygen gas (O₂) is released as a byproduct.

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Answer:

chlorine and potassium

Explanation:

Answer:

Chlorine and potassium

The reaction is a substitution reaction since bromide ion was replaced by hydroxide ion.

A chemical reaction is a change which results in a the permanent rearrangements of the atoms and constituents of a substance such that new substances are formed.

The given reaction is a as follows:

\(CH_3Br (aq) + OH^{-} (aq) \rightarrow CH_3OH (aq) + Br^{-} (aq) \\ \)

Bromide ion was replaced by hydroxide ion.

Therefore, the reaction is a substitution reaction.

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Answer: D-substitution

Other person is right its

Explanation:

i think the answer is A and D

The biodiversity of the reef depends upon the location and corals die in the muddy water.

Coral reef:

These are the ecosystem of sallow water in the oceans. They made by reef building corals. It is one of the most diverse ecosystem.

Therefore, the biodiversity of the reef depends upon the location and corals die in the muddy water.

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Approximately 24.55 cm^3 of oxalic acid must be added to sufficient water to give a 1.500 liter solution with a formal concentration of 0.300 F.

To find the volume of oxalic acid needed to make a 1.500 liter solution with a formal concentration of 0.300 F, we need to use the equation:

Formal concentration (F) = (moles of solute) / (volume of solution in liters)

First, we need to calculate the moles of oxalic acid required. The formal concentration (F) is given as 0.300, so:

0.300 = (moles of oxalic acid) / 1.500

Rearranging the equation, we find:

moles of oxalic acid = 0.300 * 1.500

moles of oxalic acid = 0.450

Next, we can calculate the mass of oxalic acid needed using its molecular mass:

mass of oxalic acid = moles of oxalic acid * molecular mass

mass of oxalic acid = 0.450 * 90.03

mass of oxalic acid = 40.5145 g

Finally, we can calculate the volume of oxalic acid needed using its density:

volume of oxalic acid = mass of oxalic acid / density

volume of oxalic acid = 40.5145 g / 1.65 g/cm^3

volume of oxalic acid = 24.55 cm^3

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Considering the definition of speed, it takes 1 hour to travel a distance of 44 misle.

Speed can be defined as the amount of space traveled per unit of time with which a body moves. That is, speed ​​is a physical quantity that expresses the relationship between the space traveled by an object and the time used for it.

The speed can be calculated using the expression:

speed= distance traveled÷ time

In this case, you know that:

Replacing in the definition of speed:

44 miles per hour= 44 miles÷ time

Solving:

44 miles per hour× time= 44 miles

time= 44 miles÷ 44 miles per hour

time= 1 h

In summary, it takes 1 hour to travel a distance of 44 miles.

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Answer:

B

Explanation:

electron.elements of the same group have the same electrons

Environmental factors can also influence gene expression and cell differentiation.

Animal cell differentiation relies heavily on the biomolecular condensation of regulatory proteins and enhancer DNA sequences. Cell differentiation is often controlled by cell signaling. Factors involved in triggering cell differentiation include the influence of the cell signaling environment and the developmental stage of the organism.

Cell differentiation is triggered by changes in gene expression. This occurs when different signaling molecules in the environment activate or repress different transcription factors required to express specific genes in the DNA. DNA is organized into chromosomes within the cell. Cells from the same source gradually generate cell populations with different morphological structures and functional properties.

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Answer:

that the polar bear will come out again in 2 years

The separation of the two component become more easy if the differ by at least because fractional distillation is a boiling point based separation method.

The fractional distillation is a process in which two liquid are separated from a mixture by using the difference in their boiling point as a main characteristic.

If the temperature of the two liquid for the two components is differing by at least 20 degree then fractional distillation can be accomplished more easily because it will become easier for us to separate the two components.

Because one of the component can be separated much earlier without wearing about the evaporation of the Other compound. The big difference in the boiling point makes the process of separation much easier.

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The solute that maintains the medullary interstitial fluid osmotic gradient in the kidneys is urea. Urea is a waste product formed during the breakdown of proteins in the liver and is excreted through urine.

It plays a crucial role in the concentration of urine and the maintenance of water balance within the body. In the kidneys, the medullary interstitial fluid is important for the process of urine concentration.

The descending limb of the loop of Henle is permeable to water, allowing water to move out of the tubules and into the interstitial fluid. However, the ascending limb is impermeable to water but actively transports solutes such as sodium and chloride out of the tubules.

As sodium and chloride ions are transported out of the ascending limb, urea is left behind, increasing its concentration in the medullary interstitial fluid.

This high concentration of urea creates an osmotic gradient, which is essential for the reabsorption of water from the collecting ducts. The osmotic gradient allows water to move out of the collecting ducts and into the surrounding interstitial fluid, leading to concentrated urine.

In conclusion, urea is the solute that helps maintain the medullary interstitial fluid osmotic gradient in the kidneys. Its presence in high concentrations in the medullary interstitial fluid is crucial for the concentration of urine and the regulation of water balance within the body.

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