When the actual gas volume is greater than the volume predicted by the ideal gas law, the explanation lies
in the fact that the ideal gas law does NOT include a factor for molecular…
(A) volume
(B) mass
(C) velocity
(D) attractions
(E) shape

Answer:

Buffer solutions are essential in regulating blood acidity because they help maintain a stable pH level in the body. The pH of blood needs to be tightly controlled within a narrow range of 7.35 to 7.45 for optimal physiological functioning. Buffers work by absorbing excess hydrogen ions (H+) or hydroxide ions (OH-) that may be introduced into the bloodstream from various metabolic reactions. For example, if the blood becomes too acidic due to an increase in H+ ions, buffer systems such as the bicarbonate-carbonic acid system can neutralize the excess H+ ions and restore the pH balance. Conversely, if the blood becomes too alkaline due to an increase in OH- ions, buffer systems can absorb the excess OH- ions and bring the pH back to normal. In this way, buffer solutions help maintain the delicate acid-base balance crucial to the proper functioning of our bodies.

Answer:

E = 19.89×10⁻¹⁶ J

λ = 1×10⁻¹ nm

Explanation:

Given data:

Frequency of xray = 3×10¹⁸ Hz

Wavelength of xray = ?

Energy of xray = ?

Solution:

speed of wave = wavelength × frequency

speed = 3×10⁸ m/s

3×10⁸ m/s  = λ ×3×10¹⁸ s⁻¹

λ = 3×10⁸ m/s  / 3×10¹⁸ s⁻¹

λ = 1×10⁻¹⁰m

m to nm:

λ = 1×10⁻¹⁰m×10⁹

λ = 1×10⁻¹ nm

Energy of x-ray:

E = h.f

h = plancks constant = 6.63×10⁻³⁴ Js

by putting values,

E = 6.63×10⁻³⁴ Js ×3×10¹⁸ s⁻ ¹

E = 19.89×10⁻¹⁶ J

Yes, the carbon-oxygen double bond is more polar than the carbon-carbon double bond. Here are some details and explanations on why it is so A polar bond is a chemical bond where a pair of electrons is unequally shared between two atoms.

The unequal sharing of electrons results in the formation of two poles, a negative pole and a positive pole. The difference in the electronegativity of the bonded atoms determines the polarity of the bond. The greater the difference in electronegativity between the two bonded atoms, the more polar the bond is.What is the electronegativity of an atom?The electronegativity of an atom is its ability to attract a pair of electrons towards itself. The higher the electronegativity of an atom, the greater its ability to attract electrons.What is a double bond?A double bond is a type of chemical bond where two pairs of electrons are shared between two atoms.

The difference in electronegativity value has an implication on the polarity of the bond. The greater the difference in electronegativity, the more polar the bond is. In the case of carbon-oxygen double bond, the difference in electronegativity is 1.0, which means that the bond is more polar than the carbon-carbon double bond, which has a difference in electronegativity of 0. In summary, the carbon-oxygen double bond is more polar than the carbon-carbon double bond.

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The electron configuration [kr]4d10 represents the atomic configuration of the element, which has 36 electrons in total. It is specifically the configuration of the noble gas krypton, which has the atomic number of 36.

The electron configuration of an atom is the number of electrons that it has in its orbitals. Orbitals are the areas around the atom's nucleus where electrons are most likely to be found. There are a variety of different orbitals, with varying energy levels and subshells. The electron configuration of an element is a concise way to represent its electronic configuration and to predict its chemical behavior.

In the case of the electron configuration [kr]4d10, the first part, [kr], indicates the configuration of the noble gas krypton, which has 36 electrons and a full outer shell. The second part, 4d10, indicates that there are 10 electrons in the d subshell of the fourth energy level. This configuration is specifically associated with the element with an atomic number of 46.

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Answer:

To be stable an atom will gain, lose, or share electrons to complete the outer most energy level (electron shell). Octet Rule because levels 2 and 3 need 8 electrons to be stable.

Answer:

See explanation

Explanation:

We know that photosynthesis involves the combination of carbon dioxide and water in the presence of sunlight to yield glucose.

If the atmosphere is rich in carbon dioxide such as  in a green house where air is filled with carbon dioxide, the rate of photosynthesis is increased.

As the rate of photosynthesis is increased, the growth of plants is also increased.

Hence, in a greenhouse where the air contains more carbon dioxide, the rate of plant growth increases.

Work done by a student who used the machine to lift a load of 150 kg through a distance of 2.5cm is 61.25 J.

Given,

Efficiency of machine in decimal= 60% = 0.6

Weight of load = 150 Kg

Distance must be in meters = 2.5cm = 0.025m

Using the formula,

Efficiency = work output/ input work

Work done is unknown.

work output = Force × Distance

Force can be calculated = m × g = 150 × 9.8 = 1470 N

work output = 1470 × 0.025 = 36.75 J

Work done = work output / Efficiency

= 36.75 / 0.6

= 61.25 J

Therefore, work done by student to lift that load is 61.25 J.

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Answer:

I'm pretty sure it's A)Helium

Explanation:

Answer:

AIR

Explanation:

Answer:

Methane has no lone pairs of electrons.

Explanation:

Methane does not have any lone pairs because it is a symmetrical molecule with four single bonds. Each of the four hydrogen atoms is bonded to the central carbon atom, and there are no unshared electron pairs.

I predict that liquid C2Cl6 would exhibit higher surface tension than liquid CCl4.

The surface tension of a liquid depends on the strength of intermolecular forces between its molecules. The greater the strength of these forces, the higher the surface tension. In this case, C2Cl6 has more molecules and a larger molecular weight compared to CCl4. Therefore, C2Cl6 will have stronger intermolecular forces and higher surface tension than CCl4. the carbon atom is bonded to four chlorine atoms, resulting in a symmetrical, tetrahedral shape. This shape and the electronegativity difference between carbon and chlorine atoms create a polar molecule, which leads to stronger intermolecular forces, specifically London dispersion forces and dipole-dipole interactions. These stronger forces contribute to a higher surface tension in CCl4 compared to C2Cl6, which has a more complex molecular structure and less polar nature.

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it's 500kg

Explanation:

I did this I hope this helps

The combination of the given components yields -16.5.

To find the combination AV​/2 - 2By​ + 5CV​,

We need to substitute the given components of vectors A, B, and C into the expression.

Given:

Ax​ = 1.0

Ay​ = 2.0

Bx​ = 3.5

By​ = -4.0

Cx​ = -5.0

Cy​ = 6.

Substituting these values into the expression:

AV​/2 - 2By​ + 5CV​ = (Ax/2) - 2(By) + 5(Cx)= (1.0/2) - 2(-4.0) + 5(-5.0)

= 0.5 + 8.0 - 25.0

= -16.5

Therefore, the combination of the given components yields -16.5.

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The correct option is (B) increase.

If the number of molecules of gas a is doubled, the rate of reaction will increase.

The measure of the change in reactant or product concentration per unit of time is known as the reaction rate for a specific chemical reaction.

The speed at which a chemical reaction proceeds is known as the reaction rate. The concentration of a reactant that is consumed in a unit of time or the concentration of a product that is produced in a unit of time is two common ways to define it (amount per unit volume).

The rate law and collision theory both state that reaction rate increases with concentration. Collisions happen more frequently as reactant concentration rises. Pressure causes a rise in the rate of gaseous reactions, which is actually comparable to a rise in the gas's concentration.

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The complete question is:

"Consider two gases, A and B, are in a container at room temperature. What effect will the following changes have on the rate of the reaction between these gases? The number of molecules of gas A is doubled.

(A)decrease

(B)increase"

The total charge on an atom comes from protons and electrons.

The proton is positively charged while the electron is negatively charged. A neutral atom would have an equal number of protons and electrons.

An atom with more protons than electrons will be positively charged while those with more electrons than protons will be negatively charged.

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Answer:

C

Explanation:

All of the other options fall under either history or subjective opinion, and C is the only one which refers the actual properties of the planet itself.

The element's Atomic number , which has 5 protons, 6 neutrons, and 2 electrons (the atomic number is the number of protons) =  5

the number assigned to a chemical element according to its atomic number in the periodic system, which places the elements in ascending order of the number of protons in their nuclei. As a result, the atomic number is also the number of protons, which in a neutral atom is always equal to the amount of electrons.

Protons and neutrons are added to determine an element's mass number. The only number that may change while maintaining the identity of an element is the number of neutrons for that element (because the atomic number is the number of protons).

Mass number = protons + neutrons

Given:

5 protons,

6 neutrons

2 electrons

Atomic number = ?

We know that the Mass number = protons + neutrons:

Mass number = protons + neutrons

Mass number = 5 + 6:

Mass number = 11

The element's Atomic number , which has 5 protons, 6 neutrons, and 2 electrons (the atomic number is the number of protons) =  5.

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The final temperature of the gas is approximately 40.96 Kelvin.

To determine the final temperature of the gas, we can use the ideal gas law, which states:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles of the gas, R is the ideal gas constant, and T is the temperature in Kelvin.

First, let's convert the given temperatures to Kelvin. We have:

Initial temperature: -125 degrees Celsius = 148 K (approximate)

Final temperature: Unknown

The initial conditions of the gas are as follows:

Initial pressure (P1) = 1.25 atm

Initial volume (V1) = 1250 mL = 1.25 L (since 1 L = 1000 mL)

Initial temperature (T1) = 148 K

The final conditions of the gas are as follows:

Final pressure (P2) = 50.0 atm

Final volume (V2) = 325 mL = 0.325 L

Final temperature (T2) = Unknown

Using the ideal gas law, we can set up the following equation:

(P1 * V1) / T1 = (P2 * V2) / T2

Substituting the known values:

(1.25 atm * 1.25 L) / 148 K = (50.0 atm * 0.325 L) / T2

Simplifying the equation:

T2 = (50.0 atm * 0.325 L * 148 K) / (1.25 atm * 1.25 L)

T2 = 40.96 K

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18.3 g of solid precipitate formed during the reaction.

Formula of lead(ii) perchlorate = \(Pb(ClO4)_{2}\)

Formula of  sodium sulfate = \(Na_2(SO_4)\)

Reaction of lead(ii) perchlorate and sodium sulfate

\(Pb(ClO4)_{2}\) + \(Na_2(SO_4)\)    ---------->  \(PbSO_4(s)\)    + \(2Na(ClO4)_{2}\)

moles of  \(Pb(ClO4)_{2}\)  =  \(\frac{given mass}{ Molar mass}\)

molar mass of \(Pb(ClO4)_{2}\) =207+(35.5+ 16*4)*2

molar mass of \(Pb(ClO4)_{2}\) =207+ 99.5*2

molar mass of \(Pb(ClO4)_{2}\) =406

given mass = 33.17g

moles of  \(Pb(ClO4)_{2}\)  =  \(\frac{given mass}{ Molar mass}\)    

moles of  \(Pb(ClO4)_{2}\) =  \(\frac{33.17}{406}\)  

moles of  \(Pb(ClO4)_{2}\) = 0.0817 moles

molar mass of \(Na_2(SO_4)\)  = 2*23+ 32+ 4*16

molar mass of \(Na_2(SO_4)\)  = 46+32+64

molar mass of \(Na_2(SO_4)\)  = 142

moles of      \(Na_2(SO_4)\)  =      \(\frac{given mass}{ Molar mass}\)    

moles of      \(Na_2(SO_4)\) = \(\frac{8.564}{142}\)  

moles of      \(Na_2(SO_4)\) = 0.0603 moles

since in the above reaction \(Pb(ClO4)_{2}\) is the solid precipitate so we have to find the weight of \(PbSO_4(s)\) formed after the reaction.

Given that the reaction is complete so one of the 2 reactant must completely ends since \(Na_2(SO_4)\) have less number of moles than \(Pb(ClO4)_{2}\)  so , \(Na_2(SO_4)\) will disappear and hence according to Stoichiometry  same number of moles of \(PbSO_4(s)\) will form

so number of moles of \(PbSO_4(s)\) formed = 0.0603

so, the weight of \(PbSO_4(s)\) formed = number of moles formed * molar mass of \(PbSO_4(s)\)

so weight of \(PbSO_4(s)\) formed  =0.0603 * 303

weight of \(PbSO_4(s)\) formed= 18.27 g ≈ 18.3 g

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Answer:

Explanation:

The sum of the coefficients is 1 + 3+ 2+ 3 = 9

Answer:

There is no answer. This equation is unbalancable.

Explanation:

The numbers for Al always throw off the entire equation!

Answer:

The correct answer is = 31.04

Explanation:

The relation between volume, temperature and pressure of a fix amount of a gas can be expressed by the combined gas law:

PV/T = k

It can be written as well as

P1V1/T1 = P2V2/T2

Given:

V1 = 217.6

P1 = 9.011 atm

T1 = 127.8°C = 400.95 K

P2 = 44.9

T2 = 11.9 °C = 285.05

Solution:

Putting value in the formula

V2 = P1V1T2/P2T1

= (217.6*285.05*9.011)/44.9*400.95

V2 = 31.04

Answer:

B

Explanation:

Answer:

BBBBBBBBB

Explanation:

Answer:

Molecules in the water move in a circular motion

Explanation:

Because of its circular motion it causes the waves to look like open circles which makes it easy for people to surf on

Water molecules move up and forward, down and back, in an overall circular motion in the wave. Therefore, option A is correct.

Circular motion is defined as the movement of an object while rotating in a circle. Circular motion can be uniform or asymmetric.

The angular rate of rotation and speed are constant in uniform circular motion, but the rate of rotation changes in non-uniform circular motion.

This means that circular motion can occur only if there is a "center seeking" force present; otherwise, things will travel in a straight line.

Within the wave, the water molecules move in a circular motion. Each water particle moves in a complete circle during a single wave period. The circle traced by a water particle on the ocean surface as a wave passes a given point has a diameter equal to the height of the wave.

Thus, option A is correct.

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The number of molecules of nitrogen will be the same as the number of molecules of hydrogen. The correct option is C.

The law states that different gases of the same volume stored at the same temperature and pressure will contain the same number of molecules.

Going by Avogadro's law, 500 ml of nitrogen and 500 ml of hydrogen kept together in one vessel at the same constant temperature and pressure will have the same number of molecules.

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The three state of matter are solid, liquid and gas.  Water exists in all these states as ice, liquid water, water vapor respectively. The level of energy will varies from each state where, gaseous particles possess highest energy.

Every substances are able to exhibit  three states of matter namely gas, liquid and solid. However, some are more stable in any one state more probably by origin.

Substances in solid state have molecules closely packed without a space to move apart each other. Hence, the energy of molecules in solid state is very low.

In liquid state, molecules have some space to move apart and thus they can flow and have no definite shape like solids.  Whereas in gases, molecules are far apart and they are free enough to move and thus have highest energy.

Therefore, water molecules in its vapor state is having highest energy than its liquid state and ice.

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• The factors that influence vapour pressure is amongst others surface area.

• So the most suitale nswer will be the mole raction of the liquid will influence vapour pressure.

• Option C is the most closest answer,.

The cultures of prehistoric humans are primarily known through the excavation of stone tools and other durable artifacts, such as the Oldowan and Acheulian tool traditions.

Stone tools and imperishable artifacts serve as key archaeological evidence for understanding prehistoric cultures. Through meticulous excavation and analysis, archaeologists have been able to piece together the lifestyles, technological advancements, and social behaviors of early human societies. The term "paleolithic" refers to the Old Stone Age, a time when humans relied on stone tools as their primary implements.

The Oldowan tool tradition is considered the earliest stone tool industry, dating back around 2.6 million years ago. It is characterized by simple tools, such as choppers and scrapers, which were crafted by flaking off pieces from larger stones. These tools were primarily used for basic activities like butchering and processing animal carcasses.

Later, the Acheulian tool tradition emerged around 1.76 million years ago, representing an advancement in stone tool technology. Acheulian tools, such as handaxes and cleavers, were more refined and standardized, showcasing an increased level of sophistication in tool-making techniques. These tools served a wide range of purposes, including hunting, woodworking, and shaping raw materials.

By studying the Oldowan and Acheulian tool traditions, researchers gain valuable insights into the cognitive abilities, cultural development, and technological progress of early humans. The examination of these artifacts provides evidence of their adaptability, problem-solving skills, and the gradual refinement of their tool-making techniques over time.

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Answer:

After jumping to the higher energy level also called the excited state the excited electron would be in a less stable position, so it would quickly emit a photon to relax back to a lower, more stable energy level.