PLS ANSWER THIS FOR ME ILL GIVE BRAINLIEST
ok so pls watch episode 18 (Eureka Videos is the channel) and then answer all these

When molecules evaporate they are gaining enough _______ to break the forces of __________ holding them together. This might be compared to the popping of popcorn.


Why can't we see the vapour molecules that have escaped?.


How does increasing the heat affect the rate of molecules popping out into the vapour state?


The colder molecules get, the _________ they move

Answer:

search from website please

The substance used as a reference standard in both the freezing-point and vapor-pressure models is A. Deionized water.

In osmometry, a reference standard is used to calibrate the instrument and establish a baseline for measurements. Both freezing-point and vapor-pressure osmometers require a known substance with well-defined properties for accurate calibration.

Deionized water (option A) is commonly used as the reference standard in osmometers because its freezing-point and vapor-pressure properties are well-established and easily reproducible.

The freezing-point of pure water is 0°C (32°F) at standard atmospheric pressure, and its vapor pressure is also well-defined.

Other substances like NaCl (option B) and KCl (option C) are used as calibration standards in specific contexts, but they are not universally applicable to both freezing-point and vapor-pressure osmometers.

Based on the given information, the substance used as a reference standard in both the freezing-point and vapor-pressure models is deionized water (option A). It serves as a reliable and widely accepted calibration standard for osmometers due to its well-defined freezing-point and vapor-pressure properties.

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a- Aluminium bromide has the following formula: AlBr₃, so the unbalanced equation is:

As we can see, for now the aluminium atoms are balanced, but the bromine is not. To balance the bromine, we can put 3 in front of Br₂ and 2 in front of AlBr₃. That way, we will have a total of 6 bromine atoms in each side:

But now the Al is unbalaced, so to fix it we can add a 2 in front of Al to get the balanced equation:

b- The aluminium are the lone atoms, so, counting them, we see that there are 8 atoms initially.

c- Each pair of empty circles represent a molecule of Br₂, counting them we have 6 molecules initially.

d- The proportion of Al to AlBr₃ is 2:2, that is, 1:1, so if all Al reacts, we would produce the same amount of AlBr₃ as Al, which would be 8 molecules.

The proportion of Br₂ to AlBr₃ is 3:2, so is all Br₂ reacts we will get 2/3 of that as AlBr₃, which would be 6*2/3 = 4 molecules.

This shows that there is not enough Br₂ to react with all 8 atoms of Al, meaning only 4 molecules of AlBr₃ will be produced.

e- Since there is not enough Br₂ to react with all Al present, the limiting reactant is the bromine.

f- The excess reactant is the other one, so if bromine is the limiting, the aluminium is the excess reactant.

g- Since only 4 molecules of AlBr₃ will be formed with all the bromine present, since the proportion of Al to AlBr₃ is 1:1, we wil need only 4 atoms of Al to produce them, which meand that, from the total 8 atoms, we will get

4 atoms of Al as excess reactant after the reaction is complete.

Answer:

A blanket

Explanation:

bottom layer is a nice comfy blanket you could use to sleep with

Explanation:

Something comfy you can use for yourself or others.

I agree with this statement. The rate of a reaction is determined by the activation energy required to form the transition state, which is the highest energy state in the reaction pathway.

The addition of HBr to 2-methylpropene involves a carbocation intermediate, which is a more stable intermediate than the transition state formed during the addition of HBr to trans-2-butene. Therefore, the activation energy required for the addition of HBr to 2-methylpropene is lower than the activation energy required for the addition of HBr to trans-2-butene. As a result, the addition of HBr to 2-methylpropene is a faster reaction than the addition of HBr to trans-2-butene.

A positively charged carbon that is bound to three substituents is referred to as a carbocation. It only contains six electrons in its valence shell since there are no nonbonding electrons. A carbocation is a potent electrophile (and Lewis acid) with just six electrons in its valence shell that can react with any nucleophile present.

Many organic reactions have been proposed to use carbocations as intermediates. They function similarly to organisms lacking in electrons called free radicals.

The carbocations are stabilised by alkyl substituents similarly to free radicals.

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Answer:

A chemical reaction equation gives the reactants and products, and a balanced chemical reaction equation shows the mole relationships of reactants and products. Often, the amount of energy involved in the reaction is given. Dealing with the quantitative aspect of chemical reactions is called reaction stoichiometry.

Answer: In the photosystem II (PSII) reaction center, energy from sunlight is used to extract electrons from water. Explantion: The electron transport chain moves protons across the thylakoid membrane into the lumen.

Answer:

I don’t know what recording station you’re referring to but, When seismic waves reach the seismograph, a graphical record, or seismogram, is produced

Explanation:

The seismic waves hitting the recording station has been resulted in the seismograph, that has been evident of the earthquake.

The seismic wave has been the radiation, with the result of the movement of the earth surface. The movement has been result in the earthquake.

The intensity of the earthquake has been measured by seismograph on the Richter scale. The seismic wave results in the movement of the leads to the production of the seismograph.

The seismic waves hitting the recording station has been resulted in the seismograph, that has been evident of the earthquake.

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Answer:

Arrange them in order of greatest to least Molar Mass to get most dense to least dense at a given temperature and pressure.

Explanation:

"Given Temperature and Pressure" just tells you that those two variables are being held constant. The Ideal Gas Law (PV = nRT) shows that n (the # of moles) and V (the volume) are variable still. To keep pressure constant, we need to increase the volume so that the force per area is the same which would unfortunately lower the density. The only way for a gas to have the greatest density would be to have the least average kinetic energy to keep the pressure constant at a smaller volume. This is because kinetic energy is equal to KE = 1/2 m v^2, where m is mass in kilograms and v is the velocity. IT IS CRUCIAL TO NOTE THAT ACCORDING TO KINETIC MOLECULAR THEORY, ALL GASES HAVE THE SAME AVG. KINETIC ENERGY WHEN AT THE SAME TEMPERATURE. So since the avg. KE is also constant across these answers due to the temp. being constant, our only way to decrease the velocity (the rate at which the particles are moving per second) and in turn the number of collisions (to repeat, a smaller number of collisions is desired because they are equal to the pressure that must maintained at a constant value at the smallest volume possible to achieve highest density possible) is to increase the molar mass. This is also pretty intutive for the other part of the issue: since Density is a broken heart (m/v), a higher molar mass would ensure a smaller pressure (due to decreased velocity) and smaller volume (due to constant pressure). Okay, now order the gases heaviest to lightest in terms of molar mass and you got your answer. Please gimme brainliest if this helped bc it took 15 minutes to type out. Hope this helped you! :D

Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. The order of density is carbon dioxide>Neon >argon>carbon-12> hydrogen.

Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water.

Mathematically,

Density of gas  = Molar Mass of the gas  ÷volume occupied by the given gases

Density is directly proportional to molar mass of the gases.

Molar mass of argon = 18g/mole

Molar mass of Neon = 20g/mole

Molar mass of carbon dioxide=44.01 g/mol

Molar mass of hydrogen=1g/mol

Molar mass of carbon-12=12g/mol

The order of gases from most dense to least dense at a given temperature and pressure is carbon dioxide>Neon >argon>carbon-12> hydrogen.

Therefore, the order of density is  carbon dioxide>Neon >argon>carbon-12> hydrogen.

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(omg, your in high school, but I'm in middle school but I have this same question lol.)

There would be an advantage for flowers that attract only one type of pollinator and excude others because the flower could be harmed by the pollinator. The flower could have a natural defense against certain species of animals to avoid things like getting completely eaten or getting a virus from an infected species. The disadvantage would be that some species that the flower needs might avoid the flower because of natural defense.

I hope this helps! Sorry if it doesn't because I'm only in middle school.    

If a plant has a specific pollinator, a good relationship evolves between the plant and the insect. If the plant becomes extinct, the plant also becomes extinct.

Pollination is the process by which pollen grains are transferred from the anther to the stigma of a flower. It is normally carried out by the agents of pollination such as wind, insects etc.

If a flower only has a specific pollinator, it is much easier for the plant to be pollinated because the pollinator evolves a good relationship with the plant.

However, if that specific pollinator happens to become extinct, that plant also becomes extinct because there will be no other pollinator for the plant specie.

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To write the balanced complete molecular chemical equation and the balanced net ionic chemical equation, including phase labels, we need to first understand what they are .

Molecular chemical equation: A molecular equation is a chemical reaction equation where the reactants and products are expressed as molecules and the charges aren't shown. A molecular equation can show the reactants and products as solids, liquids, or gases with their states written in parenthesis after each molecule.

Net ionic chemical equation: The chemical equation in which all the spectator ions are removed is known as the net ionic chemical equation. The net ionic equation represents the actual chemical change taking place in the reaction. It demonstrates the substances and ions that actually take part in the chemical change.

Here is an example of how to write the balanced complete molecular chemical equation and the balanced net ionic chemical equation, including phase labels:

Example: Sodium chloride reacts with silver nitrate to form silver chloride and sodium nitrate.

Complete Molecular Chemical Equation:

NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq)

Balanced Net Ionic Chemical Equation:

Ag+(aq) + Cl-(aq) → AgCl(s) + Na+(aq) + NO3-(aq)

The phase labels used in the above equations are:aq: aqueous phase (dissolved in water)s: solid phase (precipitate)

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Answer:

Sorry, I don't know.

Explanation:

Answer:

3.52

Explanation:

-log(3 x 10^-4) = 3.52

Answer:

Image result for Based on the traits, which traits were most prevalent in the class? Did you have more traits aligned with the dominant traits or more that were rare? If you have a rare trait, which do you have?

The Big Five personality traits are extraversion (also often spelled extroversion), agreeableness, openness, conscientiousness, and neuroticism. Each trait represents a continuum. Individuals can fall anywhere on the continuum for each trait. The Big Five remain relatively stable throughout most of one's lifetime.

Explanation:

Answer:

See below

Explanation:

From the equation you can see 5  mole O2   results in   3 moles CO2

( this is the limiting reagent because   C3H8 : O2  is   1:5)

6.2 / 5   *  3  = 3.72 moles CO2 produced

CO2 weighs ~ 44 gm/mole      44 gm/mole * 3.72 mole = 163.68 gm of CO2  

Answer:

The mass of chlorine gas that reacted ≅ 24.03 g

Explanation:

From the given information:

The number of moles of NaCl formed = mass of NaCl/molar mass

mass of NaCl = 39.6 g

molar mass = (23 + 35.5) g/mol = 58.5 g/mol

∴

The number of moles of NaCl formed = 39.6 g / 58.5 g/mol

The number of moles of NaCl formed = 0.6769 g/mol

Thus, the mass of chlorine gad that reacted = 0.6769 × 35.5

The mass of chlorine gas that reacted = 24.02995  g

The mass of chlorine gas that reacted ≅ 24.03 g

To prepare the pH 4.00 buffer solution, you should mix approximately 61.35 mL of the 0.100 M benzoic acid solution with 38.65 mL of the 0.240 M sodium benzoate solution.The ratio of benzoic acid to sodium benzoate in the buffer solution using the Henderson-Hasselbalch equation.

To prepare a pH 4.00 buffer solution using benzoic acid and sodium benzoate, we need to calculate the appropriate volumes of the 0.100 M benzoic acid and 0.240 M sodium benzoate solutions.

First, we need to determine the ratio of benzoic acid to sodium benzoate in the buffer solution. The Henderson-Hasselbalch equation can help us with this calculation:

pH = pKa + log([A-]/[HA])

Given that the pH is 4.00 and pKa is 4.20, we can rearrange the equation:

log([A-]/[HA]) = pH - pKa

log([A-]/[HA]) = 4.00 - 4.20

log([A-]/[HA]) = -0.20

Next, we take the antilog of -0.20 to find the ratio of [A-] to [HA]:

[A-]/[HA] = antilog(-0.20)

[A-]/[HA] = 0.63

The ratio of [A-] to [HA] is 0.63.

Now, let's calculate the volumes of each solution needed. Let's assume x represents the volume (in mL) of the 0.100 M benzoic acid solution and y represents the volume (in mL) of the 0.240 M sodium benzoate solution.

Since the total volume is 100.0 mL, we have the equation: x + y = 100

Considering the ratio of [A-] to [HA] as 0.63, we can write the equation: y/x = 0.63

Solving these two equations simultaneously will give us the volumes of each solution:

x + y = 100

y/x = 0.63

By substituting y = 0.63x from the second equation into the first equation, we get:

x + 0.63x = 100

1.63x = 100

x = 61.35 mL (rounded to two decimal places)

Substituting this value back into the equation x + y = 100, we find:

61.35 + y = 100

y = 38.65 mL (rounded to two decimal places)

Therefore, to prepare the pH 4.00 buffer solution, you should mix approximately 61.35 mL of the 0.100 M benzoic acid solution with 38.65 mL of the 0.240 M sodium benzoate solution.

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Taking into account the definition of density, the density of the pen is 1.8523 g/mL.

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space and it is a quantity that allows to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is:

density= mass÷ volume

From this expression it can be deduced that density is inversely proportional to volume.

In this case, you know that:

Replacing in the definition of density:

density= mass of the pen÷ volume of the pen

density= 24.08 g÷ 13 mL

Solving:

density= 1.8523 g/mL

In summary, the density of the pen is 1.8523 g/mL.

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Answer: You would need 1 mole of Fluorine

Explanation:The equation is already balanced so just looking at the coefficients in the equation we can see that Sodium Chloride (2NaCl) needs two moles for this equation and fluorine (F2) only needs one.

In order for the reaction to proceed, for every two moles of sodium chloride, there must be at least  1 mole for fluorine.

2NaCl +  F₂ → 2NaF + Cl₂

The reaction given above is balanced. When 2 moles of sodium chloride reacts with 1 mole of fluorine produces 2 moles of sodium fluoride and 1 molecule of chlorine.

Thus, two moles of sodium chloride, there must be at least  1 mole for fluorine.

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Answer:

P = 9800 Pa

Explanation:

Given that,

The mass of a box, m = 30 kg

Length of the box, l = 0.2 m

The width of a box, b = 0.15 m

We need to find the pressure it exerted on the floor. Pressure is equal to force acting per unit area. So,

\(P=\dfrac{F}{A}\\\\=\dfrac{mg}{lb}\\\\=\dfrac{30\times 9.8}{0.2\times 0.15}\\\\P=9800\ Pa\)

So, 9800 Pa of pressure is exerted on the floor.

The molecular formula for the compound is \(C_{4} H_{8}\) .

% of C = 79.85%

% of H = 20.15%

Let the mass of the compound be 100g, then

Mass of C = 70.85 g

Mass of H = 20.15 g

Molar mass = 60.15 g/mol

Moles of Carbon = \(\frac{79.85}{12.01 g/mol}\)

                             = \(6.64 mol\)

Moles of Hydrogen = \(\frac{20.15}{1.00794 g/mol}\)

                                 = \(19.99 mol\)

And we divide both sides by the lower quantity;

\(C_{\frac{6.64 mol}{6.64 mol} } H_{\frac{19.99 mol}{6.64 mol} }\) ≅ CH₂

And \((empirical formula)_{n} = molecular formula\)

60.15 g/mol = n × ( 12.01 + 2 × 1.00794)

n = 4

Therefore, the molecular formula for the compound is \(C_{4} H_{8}\) .

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Answer:

1)Or

d.Sublimation

2)

b.iodine is the solute and alcohol is solvent

3)

a.compostion of solute

Answer:

1) a) centrifugation

OR

b) sublimation

2) a) iodine is the solute and alcohol is solvent

3) a) concentration of soLute

Answer:

2 NaF + Br2 --> 2NaBr + F2

Explanation:

Well first I notice that there are two flourines on the products side so we need to put a 2 of NaF. Now there are 2 sodiums on the products side so we have to put another two in front of NaBr.

2 NaF + Br2 --> 2NaBr + F2

Answer:

D

Explanation:

Because B and C are talking about the climate. And A is just saying something general about the climate! :)

Answer:

d

Explanation:

Answer:

131.293 u

Explanation:

Answer:  0.611 grams in 2.04 x 10^24 molecules of H2O

Explanation:

To find out how many grams are in 2.04 x 10^24 molecules of H2O, we need to use the molar mass of water.

The molar mass of water is 18.015 g/mol.

To convert the number of molecules to the number of moles, we multiply by Avogadro's number, which is 6.022 x 10^23 molecules/mol.

2.04 x 10^24 molecules x 1mol/6.022 x 10^23 molecules = 0.034 mol

Then we multiply this number of moles by the molar mass of water to find the number of grams:

0.034 mol x 18.015g/mol = 0.611g

Therefore, there are 0.611 grams in 2.04 x 10^24 molecules of H2O.

Answer:

88 AMU

Explanation:

Average AMU = (84 x 0.0056) + (86 x 0.0986) + (87 x 0.0700) + (88 x 0.8258)

= 0.4704 + 8.4796 + 6.09 + 72. 64

= 87.68 AMU

= 88 AMU (sig figs)

Answer:

87.71

Explanation: acellus

The volume of a 25.2 g piece of metal with a density of 8.75 g/cm³ is approximately 2.88 cm³. Density is a measure of how much mass is contained in a given volume.

The formula for density is density = mass/volume. In this case, the mass is given as 25.2 g, and the density is 8.75 g/cm³. To find the volume, we rearrange the formula as volume = mass/density.

Substituting the known values, we get volume = 25.2 g / 8.75 g/cm³. The units of grams in the numerator and denominator cancel out, leaving us with cm³ as the unit for volume. Calculating the division, we find that the volume of the metal is approximately 2.88 cm³.

This means that 25.2 grams of this metal would occupy a volume of 2.88 cubic centimeters.

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Answer:

1 mole of Helium is answer