What is the kinetic energy of a 2kg rabbit hopping at a speed of 1.25 m/s

Explanation:

From the periodic table the element with atomic number 10 is neon and this element is a noble gas.

It's electron configuration is

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The form of water that would have physicochemical properties most different from those of bulk water is "chemically bound water." The correct answer is b.

Explanation:

Water is present in food products in various forms. The different forms of water include bulk water, physically bound water, chemically bound water, and capillary water. Bulk water refers to the water present in the spaces between food components.

Physically bound water refers to the water that is held in foods by weak physical forces such as hydrogen bonds, while capillary water is water that is present in small pores and is held by surface tension forces. The form of water that has the most different physicochemical properties from bulk water is chemically bound water.

Chemically bound water is water that is bound to the food matrix through chemical bonds such as covalent, ionic, or hydrogen bonds. It has physicochemical properties that are different from those of bulk water due to its strong bonding with the food matrix. For instance, it has a higher melting point, boiling point, and density than bulk water.

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The red color is emitted when electrons in the gas return to ground state.

From the Bohr model, we know that an electron in atom could be found in its lowest energy state. The electron could receive energy in this lowest energy state and move to a higher energy state called the excited sate. The lower energy state that the electron was at the first is called the ground state of the electron.

As the electrons return to ground states, photons of light of a characteristic wavelength is emitted. The color of the light shows the wavelength of the light emitted.

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Answer:

Explanation:

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Increasing the concentration of one or more reactants frequently causes the gas-phase reaction to accelerate.

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Answer:

SnO2

Explanation:

The limiting reactant is the reactant that runs out first during a chemical reaction.

Reactants are on the left side of the reaction, so SnO2 and H2. They tell us in the question that there is "excess" hydrogen (H2), so we know there is plenty of it, as "excess" means "more than enough." If we have more than enough hydrogen, then we know that we will run out of SnO2 first.

:)

Answer:SnO2

Explanation:

Answer:

its B

Explanation:i took the test

Answer:

I believe the answer is ; explains natural phenomena.

Explanation:

20.00 g sample of methyl salicylate contains 12.63 g of carbon, 1.06 g of hydrogen, and 6.31 g of oxygen, the empirical formula of methyl salicylate is C8H803.

The lowest entire number proportion of atoms present in a compound is given by the most straightforward formula as well as empirical formula. This formula indicates the proportion of atoms of each element inside the compound.

The lowest entire number proportion of atoms present in a compound is given by the most straightforward formula as well as empirical formula. This formula indicates the proportion of atoms of each element inside the compound.

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The vapor pressure of water at the given temperature is approximately 3.2 kPa.

What is Vapor pressure?

Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid or solid phase at a given temperature in a closed system. It is a measure of the tendency of a substance to evaporate and depends on the temperature and the intermolecular forces present in the substance.

The vapor pressure of water at 80°C is given as 47.37 kPa. We can use the Clausius-Clapeyron equation to calculate the vapor pressure of water at a different temperature:

ln(P2/P1) = (ΔHvap/R) × (1/T1 - 1/T2)

where P1 and T1 are the vapor pressure and temperature at one point, P2 and T2 are the vapor pressure and temperature at another point, ΔHvap is the enthalpy of vaporization, and R is the gas constant.

Assuming that ΔHvap is constant over the temperature range of interest, we can rearrange the equation as follows:

P2 = P1 × exp[(ΔHvap/R) × (1/T1 - 1/T2)]

We can use the known vapor pressure at 80°C and the given temperature to calculate the vapor pressure at the given temperature:

P1 = 47.37 kPa

T1 = 80°C = 353 K

T2 = given temperature = 25°C = 298 K

R = 8.31 J/mol·K (gas constant for SI units)

The enthalpy of vaporization of water is approximately 40.7 kJ/mol.

Plugging in these values gives:

P2 = 47.37 kPa × exp[(40.7 × 10^3 J/mol / (8.31 J/mol·K)) × (1/353 K - 1/298 K)]

P2 ≈ 3.17 kPa

Rounding this to the correct number of significant digits gives:

P2 ≈ 3.2 kPa

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The correct hydration equation for the formation of an aqueous solution of calcium iodide (CaI2) can be written as:

CaI2(s) + xH2O(l) ⟶ CaI2(xH2O)(aq)

In this equation, "x" represents the number of water molecules that are hydrated with each formula unit of calcium iodide. The value of "x" can vary depending on the conditions and the degree of hydration. Typically, calcium iodide forms a hexahydrate compound, so the equation can be further specified as:

CaI2(s) + 6H2O(l) ⟶ CaI2·6H2O(aq)

This means that each formula unit of calcium iodide reacts with six water molecules to form a hydrated calcium iodide complex in the aqueous solution.

Therefore,the correct hydration equation for the formation of an aqueous solution of calcium iodide (CaI2) can be written as:

CaI2(s) + xH2O(l) ⟶ CaI2(xH2O)(aq).

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Approximately 12.45 grams of solid silver chromate will precipitate when 150 mL of 0.500 M silver nitrate solution is added to excess potassium chromate.

To determine the number of moles of AgNO3 present in 150 mL of a 0.500 M AgNO3 solution, we can use the formula:

moles = concentration × volume

Given:

Concentration of AgNO3 solution = 0.500 M

Volume of AgNO3 solution = 150 mL

First, we need to convert the volume from milliliters (mL) to liters (L) since the concentration is given in moles per liter (M).

1 L = 1000 mL

Therefore, the volume of the AgNO3 solution in liters is:

150 mL × (1 L / 1000 mL) = 0.150 L

Now we can calculate the moles of AgNO3 using the formula:

moles = concentration × volume

moles = 0.500 M × 0.150 L

moles = 0.075 mol

So, there are 0.075 moles of AgNO3 present in 150 mL of the 0.500 M AgNO3 solution.

Now, let's proceed to determine how many grams of solid silver chromate (Ag2CrO4) will precipitate when the AgNO3 solution reacts with excess potassium chromate (K2CrO4).

From the balanced chemical equation:

2AgNO3(aq) + K2CrO4(aq) → Ag2CrO4(s) + 2KNO3(aq)

We can see that the molar ratio between AgNO3 and Ag2CrO4 is 2:1. Therefore, for every 2 moles of AgNO3, we will form 1 mole of Ag2CrO4.

Since we have 0.075 moles of AgNO3, we can calculate the moles of Ag2CrO4 formed:

moles of Ag2CrO4 = 0.075 mol / 2 = 0.0375 mol

To determine the mass of Ag2CrO4, we need to multiply the moles by its molar mass. The molar mass of Ag2CrO4 is calculated by summing the atomic masses of each element in the compound:

Ag2CrO4 = 2(Ag) + 1(Cr) + 4(O) = 2(107.87 g/mol) + 1(52.00 g/mol) + 4(16.00 g/mol) = 331.87 g/mol

mass of Ag2CrO4 = moles of Ag2CrO4 × molar mass of Ag2CrO4

mass of Ag2CrO4 = 0.0375 mol × 331.87 g/mol = 12.45 g

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Answer:

first identify the cation and write down its symbol and charge. Then, identify the anion and write down its symbol and charge.

Explanation:

1) The temperature of the egg at time t can be calculated using the equation T(t) = 18 + 80 * e^(-0.168t), where t is the time measured in minutes.

2) The realistic domain of the temperature function is t ≥ 0, meaning time cannot be negative.

3) A rough analysis of the temperature function shows an exponential decay curve starting at 98°C and approaching 18°C asymptotically. There is an intercept at t = 0, corresponding to the initial temperature of 98°C.

4) It takes approximately 18.17 minutes for the egg to cool to a temperature of 20°C.

1.

To solve for T(t), we can use the formula derived from Newton's Law of Cooling:

T(t) - Ts = (T0 - Ts) * e^(-kt)

Given the initial conditions:

T0 = 98°C (initial temperature of the egg)

Ts = 18°C (surrounding temperature)

T(5) = 38°C (temperature of the egg after 5 minutes)

We can substitute these values into the equation:

T(5) - 18 = (98 - 18) * e^(-5k)

20 = 80 * e^(-5k)

Dividing both sides by 80:

1/4 = e^(-5k)

Take the natural logarithm of both sides:

ln(1/4) = -5k

Solving for k:

k = -ln(1/4) / 5 ≈ 0.168

Now we have the value of k. We can substitute it back into the equation to get the temperature function:

T(t) - 18 = (98 - 18) * e^(-0.168t)

Simplifying further:

T(t) = 18 + 80 * e^(-0.168t)

2.

The realistic domain of the temperature function is t ≥ 0 since time cannot be negative.

3.

Analyzing the function:

The function is exponential decay, starting at 98°C and approaching 18°C asymptotically. There is an intercept at t = 0, where the temperature is 98°C. As time progresses, the temperature decreases and approaches 18°C. However, it never reaches exactly 18°C due to the exponential decay nature of the function.

4.

To find the time it takes for the egg to cool to a temperature of 20°C, we can substitute T(t) = 20 and solve for t:

20 = 18 + 80 * e^(-0.168t)

2 = 80 * e^(-0.168t)

Dividing both sides by 80:

1/40 = e^(-0.168t)

Taking the natural logarithm of both sides:

ln(1/40) = -0.168t

Solving for t:

t = -ln(1/40) / (-0.168) ≈ 18.17 minutes

Therefore, it takes approximately 18.17 minutes for the egg to cool to a temperature of 20°C.

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Answer:

E)All areas of the Earth will have twelve hours of light followed by twelve hours of dark.

Explanation:

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Answer:

E

Explanation:

guy above said so

Answer:

19 protons, 20 neutrons and 18 electrons.

Explanation:

The atomic number gives the number of protons 19

p = 19

The atomic mass is the sum of the protons and neutrons

p + n = 39   p = 19

put p into the equation and solve for n the neutrons.

19 + n = 39

Subtract 19 from both sides

19 − 19 + n = 39 − 19

n = 20

The number of electrons equals the number of protons in a neutral atom. The positive charge equals the negative charge. The negative charge is the number of electrons. This ion has a charge of +1. So solve for the negative charge.

− 19 + 1 = − 18

The negative charge is -18 so

e = 18

Answer:

When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl).

10.958 g of nitrogen would combine with 1.113g of hydrogen to make the same compound. This is calculated from the concept of mass ratio.

Mass ratio gives the mass of an element that is found in combination with another element. the number of atoms of each specific type must be the same on both sides of the equation. Mass ratio is also called as percent composition of the mass. This principle gives rise to the Law of Constant Composition.

If 2.564 g of nitrogen combines with 0.3689 g of hydrogen to yield compound x. then nitrogen would combine with 1.133 g of hydrogen to make the same compound. According to this,

mass of N2 in the 1st compound / mass of H2 in the 1st compound

= mass of N2 in the 2nd compound / mass of H2 in the 2nd compound

=  3.670 g / 0.5275 g  =  x / 1.575 g

x = 10.958 g of N2

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The percent ionization of hydrazoic acid (HN3) in a 0.100 M solution is 4.36%.

To calculate the percent ionization of hydrazoic acid (HN3) in a 0.100 M solution, we first need to determine the Ka value for the acid. According to Appendix D in most general chemistry textbooks, the Ka value for HN3 is 1.9 x 10^-5.

Next, we can set up the equilibrium equation for the ionization of HN3:

HN3 + H2O ⇌ H3O+ + N3-

We can assume that the initial concentration of HN3 is equal to 0.100 M, and since the acid is monoprotic, the initial concentration of H3O+ and N3- ions is 0. Therefore, at equilibrium, we can assume that x moles of HN3 have ionized to form x moles of H3O+ and N3- ions.

Using the Ka expression for HN3, we can write:

Ka = [H3O+][N3-] / [HN3]

1.9 x 10^-5 = x^2 / (0.100 - x)

Solving for x, we get x = 0.00436 M. This represents the concentration of H3O+ and N3- ions at equilibrium.

To calculate the percent ionization, we can use the formula:

% ionization = (moles of H3O+ formed / initial moles of HN3) x 100

Since we assumed that x moles of HN3 ionized to form x moles of H3O+ and N3- ions, we can say that moles of H3O+ formed = x. The initial moles of HN3 is equal to the initial concentration times the volume of the solution (assuming a volume of 1 L):

initial moles of HN3 = 0.100 M x 1 L = 0.100 moles

Therefore, % ionization = (0.00436 moles / 0.100 moles) x 100 = 4.36%.

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Answer:

7NH

Explanation:

Answer:

Option 1, Soil erosion

Answer:

If the mass stays constant the object's density decreases as the volume increases. ... Because the property of density is a constant for all variables, density can be used to identify the material an object is made of.

Explanation:

Answer:

dont know how many

Explanation:.

The magnitude of the force acting on the body is 4000 Newtons.

To find the magnitude of the force, we can use Newton's second law of motion, which states that the force applied to an object is equal to the product of its mass and acceleration.

The given information includes the mass of the body (80 kg) and the resulting velocity (10 m/s). However, since the time duration (0.2 seconds) is also provided, we can use it to calculate the acceleration of the body.

The formula to calculate acceleration is:

Acceleration = Change in Velocity / Time

The change in velocity can be calculated by subtracting the initial velocity (which is 0 m/s as the body is at rest) from the final velocity:

Change in Velocity = Final Velocity - Initial Velocity

Change in Velocity = 10 m/s - 0 m/s

Change in Velocity = 10 m/s

Now, we can calculate the acceleration:

Acceleration = Change in Velocity / Time

Acceleration = 10 m/s / 0.2 s

Acceleration = 50 m/s²

Finally, we can calculate the magnitude of the force using Newton's second law:

Force = Mass x Acceleration

Force = 80 kg x 50 m/s²

Force = 4000 N

Therefore, the magnitude of the force acting on the body is 4000 Newtons.

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Folded mountains like the himalayan mountains form along the boundary type is the convergent, both continental crust plates.

When two continental crust plates collide, they create folded mountains. This is because continental crust is thicker and less dense than oceanic crust, so when the two plates collide, they cannot easily sink into the mantle. Instead, they push against each other and fold upwards, creating mountain ranges like the Himalayas.

In contrast, when two oceanic crust plates collide (convergent, both oceanic crust plates), one plate typically sinks under the other, creating a subduction zone. When two oceanic crust plates move away from each other (divergent, both oceanic crust plates), new oceanic crust is created at the boundary. When two continental crust plates move away from each other (divergent, both continental crust plates), a rift valley is created. Therefore, the correct answer is convergent, both continental crust plates.

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Answer:

because we bystanders can see them through the sky and from the ground.

Explanation:

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Answer:

Air pressure and the density of the air are also less at high altitudes. The layer above the troposphere is called the stratosphere. Nearly all of the water vapor and dust particles in the atmosphere are in the troposphere. That is why most clouds are found in this lowest layer, too.

Explanation:

Answer:

be careful to not hurt yourself

Answer: make sure the liquid is pointing away from the face

Explanation:

Answer

63.55

Explanation:

63

C

u

 has

69.2

%

abundance.

65

C

u

has

30.8

%

abundance.

So, the weighted average is

62.93

×

69.2

%

+

64.93

×

30.8

%