What is Mitosis (no plagiarism)

Common errors in atomic models can include incorrect placement of subatomic particles, improper scale, misunderstanding of atomic space, or misrepresentation of electron paths as demonstrated in the Bohr model.

Without seeing the specific diagram referenced in the question, it's hard to identify the exact flaw in the model of the atom. However, common mistakes in atomic models often include misplacing the subatomic particles (protons, neutrons, and electrons), misunderstanding the scale of the atom, or ignoring the fact that atoms are mostly empty space. For example, in the Bohr model of the atom, electrons orbit the nucleus in definite paths, which is an inaccurate depiction according to quantum mechanics.

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Answer:

insulators

Explanation:

Insulators are any substance which do not let any heat to pass through it. In other words we can say that insulators are bad conductors of heat.

Example of insulators are clothes, woods, plastic

Blacksmiths work with metals which are heated at very high temperature. If the body of blacksmiths comes in contacts of metal with high temperature, they may get severe burn. To avoid any accidents they use clothes and gloves so in case if by mistake they come in contact with high temperature, these clothes and gear do not let let pass through it and protect the body of blacksmith.  

Since these clothes and gloves do not let heat flow through it they belong to the category of insulators.

Answer:C

Explanation:

on edge

Final answer:

A pan of warm water will become the same temperature as the room because of heat transfer due to non-equilibrium. Heat will move from the warm pan to the cooler room air until they reach thermal equilibrium. This process is guided by the second law of thermodynamics and the principle of calorimetry.

Explanation:

A pan of warm water will eventually become the same temperature as the room it is in because the water and the pan will exchange heat with the room's air until thermal equilibrium is reached. Initially, the pan is at a higher temperature than the surrounding air. Over time, heat is transferred from the warmer object (the pan with water) to the cooler one (the surrounding air) until both reach the same temperature. This principle is based on the second law of thermodynamics, stating that the heat will always flow from a hotter object to a cooler one until the system reaches equilibrium.

When you pour 0.250 kg of 20.0°C water into a 0.500-kg aluminum pan with a temperature of 150°C and place it on an insulated pad, the pan and the water are initially not in thermal equilibrium. However, due to the rapid heat transfer, they will quickly exchange heat. The heat lost by the pan equals the heat gained by the water. The process continues until they are both at the same temperature, known as the thermal equilibrium.

Answer:

C) It has a constant average kinetic energy

Explanation:

The average kinetic energy of the particles in a gas is directly proportional to the temperature of the gas, according to the equation.

k is the Boltzmann's constant

T is the absolute temperature of the gas

Therefore, temperature of a gas is a measure of the average kinetic energy of the particles.

In this problem, we are told that the gas is at constant temperature (and volume): therefore, according to the previous equation, this means that the average kinetic energy is also constant.

Answer:

C - It has a constant average kinetic energy

Explanation:

Got it right on the test

Answer:

19.2g

Explanation:

The equation of the reaction is;

Li3N(s) +3H2O(l) ---->NH3(g) +3LiOH(aq)

From Avogadro's law we know that 1 mole of any gas occupies a volume of 22.4 L under standard conditions.

It is also clear from the equation that 1 mole of lithium nitride produces 1 mole of ammonia occupying 22.4L volume

Hence;

1 mole of Lithium nitride yields 22.4 L of ammonia

x moles of lithium nitride yields 12.26L of ammonia

x= 12.26×1/22.4

x= 0.55 moles of lithium nitride

Molar mass of lithium nitride= 34.83 g/mol

Mass of lithium nitride = number of moles × molar mass

Mass of lithium nitride= 0.55 moles × 34.83 g/mol

Mass of lithium nitride = 19.2g

Answer:

The mass of lithium nitride that produces 12.26 L of ammonia is 19.053 g

The mass of lithium hydroxide produced is 39.3 g

Explanation:

Water and Lithium nitride combine to form ammonia and lithium hydroxide the  equation for the reaction being;

Li₃N(s) + 3H₂O(l) → NH₃ (g)  + 3LiOH (aq)

That is 1 mole of lithium nitride combines with 3 moles of water molecules to form 1 mole of ammonia gas plus 3 moles of lithium hydroxide

Whereby the volume of ammonia produced is 12.26 L, we have at STP

PV = nRT

Therefore, n = PV/RT

Where:

P = Pressure = 1 atm

V = Volume = 12.26 L

R = Universal gas constant = 0.08205 L·atm/(mol·K)

T = Temperature = 273.15 K

Plugging the values in gives;

n = (1×12.26)/(0.08205×273.15) = 0.547 moles

Since 1 mole of lithium nitride forms 1 mole of NH₃, 0.547 mole will be required to produce 0.547 moles of NH₃ and 3×0.547 or 1.64 moles of LiOH

Molar mass of Li₃N = 34.83 g/mol

Molar mass of LiOH = 23.95 g/mol

Since mass = Number of moles × molar mass, we have;

Mass of Li₃N = 0.547 × 34.83 = 19.053 g  

Mass of LiOH = 1.64 × 23.95 = 39.3 g

Therefore;

The mass of lithium nitride that produces 12.26 L of ammonia = 19.053 g

The mass of lithium hydroxide produced = 39.3 g.

Answer:

poor hydrogen-ion donor

Explanation:

Acid dissociation constant constant chemistry is the equilibrium constant of the dissociation reaction of an acid, it is denoted by Ka. This equilibrium constant is a measure of the strength of an acid in a solution.

Note these as a rule of thumb:

When Ka is large, the dissociation of the acid is favored.

When Ka is small, the acid does not dissociate to a large extent.

Hence, a Ka of 4.3 x 10-7 shows a weak acid. A weak acid is a poor hydrogen ion donor because it does not dissociate to a large extent in solution.

According to its chemical reaction where it donates a hydrogen ion, and despite having a small Ka value, H2CO3 (carbonic acid) can be classified as a relatively good hydrogen-ion donor.

Given that the equation  H2CO3 = H+ + HCO3- represents the dissociation of carbonic acid into a hydrogen ion (H+) and a bicarbonate ion (HCO3-), H2CO3 can be identified as a good hydrogen-ion donor. This is because in this reaction, it readily gives up a hydrogen ion, which is characteristic of acid behavior. An acid's strength is determined by its ability to donate hydrogen ions, and the bigger the constant Ka value, the stronger the acid. However, a Ka of 4.3 x 10-7 is quite small, indicating that carbonic acid does not completely ionize in solution but it's relatively better at donating hydrogen ions than accepting them.

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Answer:

Density directly proportional to mass and inversely proportional to volume, if you increase the density of the mass increases and vice versa, if you increase the volume density decreases and vice versa.

A compound is something that is composed of two or more separate elements; a mixture.

Explanation:

Answer:

Blue

Explanation:

It is the closest color to violet.

The color which has the highest energy is the blue color because it have low wavelength value.

Energy of any waves of color will be calculated by using the below equation as:

E = hυ, where ............... (i)

h = plank's constant

υ = frequency of wave

Frequency is inversely proportional to wavelength (λ) as:
υ = c/λ, where ................. (ii)

c = speed of light

From (i) & (ii)

E = hc/λ

From this we conclude that wavelength is inversely proportional to energy and wavelength of blue color is smaller than other so that it will have higher energy.

Hence blue color has the highest energy.

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Answer:Chemical energy

Explanation:

Answer:

It is not a gas because its particles do not have large spaces between them.

Explanation:

Answer:

18.8

Explanation:

Just trust me it’s Ap3x Things

Answer:

18.8

Explanation:

*wink wink*

Answer:

Q = 63.75J

Explanation:

Mass = 2.5g

Initial temperature (T1) = 25°C

Final temperature (T2) = 50°C

Specific heat capacity of Mg = 1.020J/g°C

Heat energy = ?

Heat Energy (Q) = mc∇T

Q = heat energy

M = mass of substance

C = specific heat capacity of substance

∇T = change in temperature = T2 - T1

Q = mc∇T

Q = mc(T2 - T1)

Q = 2.5 × 1.020 × (50 - 25)

Q = 2.55 × 25

Q = 63.75J

The heat energy required to raise magnesium metal from 25°C to 50°C is 63.75J

Answer:

D

Explanation:

It depend on your parents genes. What they have, is what you'll have.

~Jack Pullman

p.s. Mark for brainiest!

Answer:

C. Nutrition and Enviroment

Explanation:

An individual growing up in poverty will not get as the good nutrition as an individual from a rich household. Nutrition affects growth, so malnutrition can make a person shorter and ruining their potentially taller height.

Answer: [tex]Rate=\frac{\Delta_{\text {reactants or products}}}{\Delta_{time}}[/tex]

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

Rate of reaction can be defined in terms of reactants or products. It is the ratio of disappearance of reactants per unit time or ratio of appearance of products per unit time.

[tex]Rate=\frac{\Delta_{reactants}}{\Delta_{time}}[/tex] or [tex]Rate=\frac{\Delta_{products}}{\Delta_{time}}[/tex]

[tex]S_{products}-S_{reactants}[/tex] gives the entropy change for the reaction.

[tex]\Delta H-T\Delta S[/tex] gives Gibbs free energy.

[tex]PV=nRT[/tex] is the ideal gas equation.

Final answer:

Chemical kinetics equation for reaction rates and how rates of reactions depend on reactant and product concentrations.

Explanation:

Reaction rates in chemical kinetics are described by the equation: rate = k[A]m[B]n , where k is the rate constant, m and n are exponents determined experimentally, and m+n is the reaction order.

The rate of a chemical reaction can be expressed as the change in concentration of reactants or products over time. In general, the rate of reaction depends on the concentration of reactants or products involved in the reaction.

For a net forward reaction under rapid equilibrium conditions, the rate equation can be derived and expressed in terms of concentrations of reactants and products.

The empirical formula is Diphenyl ether. 2-Phenylphenol, or o-phenylphenol.

For the empirical formula of a compound, you need to find the simplest, whole-number ratio of the elements present in the compound. The given molecular formula is C12H10O.

1. Determine the number of moles for each element:

  Carbon (C): 12 moles

  Hydrogen (H): 10 moles

  Oxygen (O): 1 mole

2. Find the simplest, whole-number ratio by dividing each mole value by the smallest number of moles (which is 1 in this case):

  C: 12 moles / 1 = 12

  H: 10 moles / 1 = 10

  O: 1 mole / 1 = 1

So, the empirical formula is Diphenyl ether. 2-Phenylphenol, or o-phenylphenol.

Answer:

c) ensure the results are accurate

Explanation:

you don't really know they're accurate unless you get them 2+ times

The steps which we taken into consideration during the changing of state of water from ice to steam are by increasing the temperature or by providing heat.

When any amount of energy is released or absorbed by any matter as a result of which changes in state of matter of substance takes place.

Hence, the steps that required to change ice to steam is by increasing temperature.

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Answer:

explanation:

1

Answer:

124.579 g

Explanation:

Amount of heat required to change the temperature of body is given by the equation given below

Q = m* c * ΔT ____________________equation A

where Q is the total heat energy required by the any object

c is the specific heat capacity of the body J/gK

ΔT is the difference of final temperature of the object and initial temperature of the object

______________________________________

Given Q = 6290 joules

c = 0.900 J/gK

To calculate the temperature in kelvin from Celsius

we can use the formula

K = C + 273

initial temperature  = 23.9°C

initial temperature on kelvin scale =  23.9° + 273 = 296.9

Final temperature  = 80°C

initial temperature on kelvin scale =  80° + 273 = 353

ΔT(temperature difference) = 353 - 296.9 = 56.1

___________________________________________

let the mass of of the  aluminum be m g

substituting the value of Q , c, ΔT in equation A we have

Q = m* c * ΔT

=> 6290 = m * 0.900 * 56.1

=> m = 6290/(0.900 * 56.1 )

=> m = 6290/50.49

=> m = 124.579 g

The mass of the  aluminum is 124.579 g

Taking into account the definition of calorimetry, the mass of the aluminum is 124.58 grams.

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is the heat energy that is supplied to a body or an object, causes its temperature to increase without affecting its molecular structure and therefore its phase. In other words, sensible heat is the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

The equation that allows calculating heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Replacing:

6290 J= 0.9[tex]\frac{J}{gK}[/tex]× m× 56.1 K

Solving:

6290 J= 50.49 [tex]\frac{J}{g}[/tex]× m

6290 J÷ 50.49 [tex]\frac{J}{g}[/tex]= m

124.58 g= m

Finally, the mass of the aluminum is 124.58 grams.

Learn more:

Answer:

The hydrogen ion concentration of the substance is 3.16*10⁻⁵ M

Explanation:

pH is a parameter used to measure the degree of acidity or alkalinity of a substance. The pH is calculated as the negative logarithm (base 10) of the concentration of hydronium ions [H₃O⁺] or hydrogen ions [H⁺].

pH= - log [H₃O⁺]= - log [H⁺]

Values ​​on the pH scale range from 0 to 14, where pH equal to 7 is neutral, below 7 is acidic and above 7 is basic.

In this case, pH= 4.5

So:

4.5= - log [H⁺]

Solving:

[ H⁺]= 10⁻⁴ ⁵

[H⁺]= 3.16*10⁻⁵ M

The hydrogen ion concentration of the substance is 3.16*10⁻⁵ M

Answer:

Solute, solvent

Explanation:

In a solution, the substance that is dissolved is called the solute, and the substance that does the dissolving is called the solvent. Together, they form a solution, which is a homogeneous mixture where the solute is evenly distributed in the solvent.

In a solution, the substance that gets dissolved is called the solute. For instance, when you make a cup of tea, the tea leaves (or tea bag) represent the solute, as they get dissolved in the water. Meanwhile, the substance that does the dissolving is referred to as the solvent. In the tea example, the water would be the solvent because it is the substance that dissolves the tea leaves or tea bag.

The process of a solvent dissolving a solute results in a solution, a homogeneous mixture where the solute is uniformly distributed within the solvent.

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Answer:

C. It makes sure there is a balance inside the body

Explanation:

Hope this helps

Answer:

C. It make sure there is a balance inside the body.

Explanation:

Homeostasis in the body tries to maintain the norm for the survival of the body. This includes temperature & amount of fluids inside the body. If they are too out in the end of the spectrum, your brain will tell you that you need to obtain it, such as drinking more water, going to a cool place if you are in the heat, or to obtain warmth if you are in the cold.

Answer:B)

The sample size of five was too small.

Explanation:

Answer:

200 m/s.

Explanation:

The car's velocity after 3 seconds can be calculated using the kinematic equation:

v= u+ at

Given:

- Initial velocity, u = 50m/s

- Acceleration, a = 50m/s2

- Time, t = 3 s

Plugging the values into the equation:

v = 50 + 50 * 3

v = 50 + 150

v = 200 m/s

Therefore, the car's velocity after 3 seconds will be 200 m/s. Hope this helps!!

The car's velocity after 3 seconds is 200 m/s, calculated using the formula for final velocity with an initial velocity of 50 m/s and an acceleration of 50 m/s².

To find the final velocity of a car with an initial velocity and constant acceleration, you can use the formula v = u + at, where v is final velocity, u is initial velocity, a is acceleration, and t is time.

In this case, the car has an initial velocity (u) of 50 m/s and a constant acceleration (a) of 50 m/s². After 3 seconds (t), we can calculate the final velocity using the formula:

v = u + at
v = 50 m/s + (50 m/s² × 3 s)
v = 50 m/s + 150 m/s
v = 200 m/s

Therefore, the car's velocity after 3 seconds is 200 m/s.

Answer:

Air, liquids or solids.

Explanation:

Sound is a form of mechanical waves, which needs a material medium to propagate. There is no sound in the void. Sound can be propagated in gases, liquids and solids. The best choice is "Air, liquids or solids".

Answer:

c

Explanation:

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