if atoms were smaller, planck's constant would be group of answer choices larger. smaller. no different in physical size.
Answers
If atoms were smaller, Planck's constant would be smaller.
Planck's constant is the proportionality constant pertaining to a photon's strength to its frequency. a particle representing a quantum of mild or different electromagnetic radiation. A photon contains strength proportional to the radiation frequency however has 0 relaxation mass. The constant offers the connection among the strength of a photon and its frequency, and through the mass-strength equivalence, the connection among mass and frequency. This constant is directly proportional to the number of atoms. therefore if atoms were smaller, Planck's constant would be smaller.
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Related Questions
5. A box with a volume of 22.4 L contains 1.0 mol of nitrogen and 2.0 mol of hydrogen at 0°C. Which of the following statements is true?
A. The total pressure is 202 kPa.
B. The partial pressure of N2 is 101 kPa.
C. The total pressure in the box is 101 kPa.
D. The partial pressures of N2 and H2 are equal.
Answers
B. The partial pressure of N2 is 101 kPa
Further explanationGiven
volume = 22.4 L
1.0 mol of nitrogen and 2.0 mol of hydrogen at 0°C
Required
Total pressure and partial pressure
Solution
Ideal gas law :
PV = nRT
n total = 3 mol
T = O °C + 273 = 273 K
P = nRT/V
P = 3 x 0.08205 x 273 / 22.4
P total = 3 atm = 303,975 kPa
P Nitrogen = 1/3 x 303.975 = 101.325 kPa
P Hydrogen = 2/3 x 303.975 = 202.65 kPa
Answer:The partial pressure of N2 is 101 kPa
Explanation:
is facilitated diffusion passive or active transport?
Answers
Answer:
Its passive
Explanation:
Facilitated diffusion is a type of passive transport that allows substances to cross membranes with the assistance of special transport proteins.
Pb(NO3)2 (aq) + 2 NaI (aq) --> PbI2 (s) + 2 NaNO3 (aq)
Starting with with 200.0 grams of Pb(NO3)2 and 120.0 grams of NaI:
A. What is the limiting reagent?
B. How many grams of PbI2 is theoretically formed?
C. How many grams of the excess reactant remains?
D. If 48 grams of NaNO3 actually formed in the reaction, what is the percent yield of this reaction?
Answers
Starting with with 200.0 grams of Pb(NO3)2 and 120.0 grams of NaI:
A. What is the limiting reagent?
B. How many grams of PbI2 is theoretically formed?
C. How many grams of the excess reactant remains?
D. If 48 grams of NaNO3 actually formed in the reaction, what is the percent yield of this reaction?
The brain chemicals known as endorphins produce effects similar to which substance?
Answers
The brain chemicals known as endorphins produce effects similar to opioids.
Opioids are a class of drugs that act on opioid receptors in the brain and produce pain relief, euphoria, and a sense of well-being.
Endorphins are natural neurotransmitters that are produced by the body in response to various stimuli, such as exercise, laughter, and certain foods.
When endorphins are released, they bind to opioid receptors in the brain, leading to feelings of pleasure and pain reduction. This is why endorphins are often referred to as the body's natural painkillers. Similar to opioids, endorphins can produce a sense of euphoria and an overall improvement in mood.
The release of endorphins is commonly associated with exercise. During physical activity, endorphins are released, which can result in a phenomenon known as the "runner's high." This is a feeling of euphoria and increased well-being that is often reported by long-distance runners.
In addition to exercise, other activities that can stimulate endorphin release include laughter, socializing, and certain types of foods, such as dark chocolate and spicy foods. These activities can promote feelings of happiness, relaxation, and pain relief, similar to the effects of opioids.
In summary, endorphins produce effects similar to opioids, including pain relief, euphoria, and an overall sense of well-being. They are natural chemicals produced by the body in response to various stimuli, such as exercise, laughter, and certain foods.
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1) the molecular formula of a hydrocarbon is to be determined by analyzing its combustion products and investigating its colligative properties. (a) the hydrocarbon burns completely, producing 7.2 grams of water and 14.2 g of co2 at standard conditions. what is the empirical formula of the hydrocarbon? (hint: if you get a .5 multiply by 2!!!)
Answers
The hydrocarbon burns completely, producing 7.2 grams of water and 14.2 g of CO₂ at standard conditions. the empirical formula of the hydrocarbon is C₂H₅.
let the given hydrocarbon be : CxHy
the chemical equation is given as :
CxHy + O₂ ----> H₂O + CO₂
given that :
CO₂ = 14.2 g
H₂O = 7.2 g
no. of moles of H in H₂O = mass / molar mass
= 2(7.2 g / 18)
= 0.80 mol
no. of moles of C in CO₂ = mass / molar mass
= 14.2 / 44
= 0.32
divided by 0.3
H = 1
C = 2.5
Now multiply by 2, we get :
5 mol of H : 2 mol of C
The empirical formula : C₂H₅
Thus, The molecular formula of a hydrocarbon is to be determined by analyzing its combustion products and investigating its colligative properties. The hydrocarbon burns completely, producing 7.2 grams of water and 14.2 g of CO₂ at standard conditions. the empirical formula of the hydrocarbon is C₂H₅.
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Can liquid CO2 exist on Earth? Why or Why not ?
Answers
I uploaded the answer to a file hosting. Here's link:
tinyurl.com/wpazsebu
The ambiguous name dimethylcyclopentene does not clearly distinguish between several structures.
A) Draw the structures of all constitutional isomers corresponding to this name.
B) Indicate which of these is likely to be the most stable i.e., have the smallest heat of combustion, justifying your rationale breifly.
C) Which of these structures represents an achiral molecule?
Answers
The linear dimethylpentene represents an achiral molecule, as it does not have a center of chirality.The cyclic dimethylpentene is likely to be the most stable isomer.
A) There are two constitutional isomers that correspond to the name dimethylcyclopentene. The structures are as follows:
Cyclic dimethylpentene:
H3C CH3
| |
C CH
| |
C CH
| |
C CH
| |
C CH
| |
C CH2
Linear dimethylpentene:
H3C CH3
\ /
C=C
/
C CH2
B) The cyclic dimethylpentene is likely to be the most stable isomer, as it has a more compact and organized arrangement of atoms, which leads to stronger bond interactions and a lower energy state. This can result in a lower heat of combustion compared to the linear isomer.
C) The linear dimethylpentene represents an achiral molecule, as it does not have a center of chirality.
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what is milliliter the same as?
Answers
Answer:
1 cubic centimeter
Explanation:
Answer:
milliliter is the same as cm^3
Explanation:
When white light passes through a prism, what can be discovered?
A)
White light is made invisible by passing through prisms.
B)
White light is made brighter by passing through prisms.
White light is made of a spectrum of various colors.
D)
White light gets hotter when it passes through prisms.
Answers
Answer:
White light is made of a spectrum of various colors.
Explanation:
As light passes through a prism, it is bent, or refracted, by the angles and plane faces of the prism and each wavelength of light is refracted by a slightly different amount. ... As a result, all of the colors in the white light of the sun separate into the individual bands of color characteristic of a rainbow.
during the cell cycle, compounds called cyclins increase and decrease in a regular pattern. what is the role of cyclins?
Answers
During the cell cycle, compounds called cyclins increase and decrease in a regular pattern. They regulate the stages of cell division and growth.
Cell cycle development is regulated in element by way of the sequential pastime of various cyclins. The cyclins are regulatory subunits that bind, prompt and provide substrate specificity for their catalytic companion serine-threonine kinases, collectively called cyclin-established kinases.
Cyclins are a family of proteins that don't have any enzymatic interest of their personal however spark off CDKs through binding to them.
S cyclins are involved inside the induction of DNA replication and early stages of mitosis. Their stages upward push at the beginning of S phase and fall in early mitosis.
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Thực hiện chuỗi phản ứng sau: CaCO, CaO CaSO, SO₂ → K₂50₂
Answers
Answer:
nnhnhgnklhnhmkghklmfmg
Explanation:
cvgngh kcvl vl gkh kn hg
A scientist performs an experiment on an unknown element. She finds that the unknown element forms an ionic bond with beryllium (Be). She concludes that the unknown element must belong in group 2 of the periodic table. State whether or not you think this result supports her conclusion, and why. (2 points)
Answers
The test result, which shows a bond with beryllium but not lithium, does not support her conclusion.
What is beryllium?
Beryllium basically is a chemical element with the symbol Be and atomic number 4. It is a light, strong, and alkaline metal that is used in alloys, medical equipment, and aerospace components due to its light weight and high strength. It is also used in nuclear reactors as a neutron reflector and absorber.
Beryllium is a group 2 element that forms ionic bonds with nonmetals.
Non-metals are elements ranging from Group 15 to Group 17.
As a result, the unknown element must be from Group 15 to Group 17.
Hence, her conclusion that the unknown element belong to group 2 is wrong.
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非 #o
How does the potential
and kinetic energy change
on this roller coaster
ride?
Answers
Answer:
the potential energy is stored energy so when your going up a roller coaster your storing energy and gaining charger for it to release when you go down which is kinetic energy
Explanation:
hope this is what you were looking for
Reactants are the ____________ , or substances, that are present ____________ of the chemical reaction; they are usually written on the ____________ side of the equation. Products are substances that are present ____________ of the chemical reaction, and they are generally written on the ____________ side of the equation. A generic chemical reaction can be written: A B ----> C In this reaction, A and B are the ____________ and C is the ____________ . In a balanced equation, the number of elements on the product side of the reaction ____________ the number of elements on the reactant side.
Answers
In chemical reactions, reactants are substances which form products in a reaction and the number of molecules are balanced on both sides at the end of the reaction.
What are reactants and products in a reaction?Reactants are the molecules or substances, that are present at the start of the chemical reaction.
They are usually written on the left-hand side of the equation.
Products are substances that are present at the end of the chemical reaction.
They are generally written on the right-hand side of the equation.
A generic chemical reaction can be written:
A + B ----> CIn this reaction, A and B are the reactants and C is the product .
In a balanced equation, the number of elements on the product side of the reaction is equal to the number of elements on the reactant side.
Therefore, reactants are substances which form products in a reaction and the number of molecules are balanced on both sides at the end of the reaction.
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Please someone do this for mee
Answers
Answer:
b and d are physical
a and c are chemical
hope dis helps
PLZ GIVE BRAINLIEST!!!!!!
Answer:
Burning of a House: Chemical Change
cutting candle wax: physical change
buring a candle: chemical change
keying a car: physical change.
The apparatus shown can be used to compare the amount of energy given out by different fuels. The shields and lid are used to limit loss of... what?
Answers
The shields and lid in the apparatus are used to limit the loss of heat energy. When comparing the amount of energy given out by different fuels.
The shields and lid in the apparatus are used to limit the loss of heat energy. When comparing the amount of energy given out by different fuels, it is essential to minimize any external influences or energy losses that could affect the accuracy of the measurements.
The shields surrounding the apparatus serve as insulators, reducing heat transfer between the system and its surroundings. By minimizing heat loss to the environment, the shields help maintain a more controlled and isolated environment, ensuring that the energy released by the fuels is primarily measured and accounted for within the apparatus.
The lid further aids in limiting heat loss by covering the top of the apparatus. It helps trap the heat generated during fuel combustion and prevents it from escaping through the opening. By keeping the heat contained within the system, the lid minimizes the loss of energy to the surrounding environment.
Overall, the shields and lid work together to minimize the loss of heat energy, allowing for a more accurate comparison of the energy given out by different fuels.
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If the dissolution of borax in water is spontaneous, is the change in enthalpy positive or negative - or are both signs possible? choose... why do you predict this? choose... choose... .
Answers
If the dissolution of borax in water is spontaneous, the change in enthalpy will be both positive and negative. It can be predicted by the sign of the enthalpy change depending on the temperature.
What is borax?Borax is a hydrated borate of sodium. It is a salt. When borax is mixed in water, it is converted into boric acid and the pH will be 9.13.
Enthalpy is a total heat energy present in a closed system, also called a thermodynamic system.
Thus, the change in enthalpy will be of both signs. Predicted by the sign of the change in temperature.
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an alpha particle, consisting of two protons and two neutrons, is located at nm and produces an electric field in all of space. a neutral krypton atom, with polarizability is brought to the location nm. what is the resulting dipole moment that the krypton atom attains? (recall the relationship bet
Answers
For an alpha particle, consisting of two protons and two neutrons : The resulting dipole moment that the krypton atom attains is 6.48 × 10^-29 C m.
The dipole moment that a neutral atom acquires when placed in an external electric field is given by the equation:
p = α E
where p is the dipole moment, α is the polarizability of the atom, and E is the strength of the electric field.
In this case, the alpha particle produces an electric field in all of space. Since the krypton atom is brought to a distance of 1 nm from the alpha particle, we can assume that the electric field at that location is due to the alpha particle only. The electric field due to a point charge, such as the alpha particle, is given by Coulomb's law:
E = k q / r^2
where k is the Coulomb constant, q is the charge of the alpha particle, and r is the distance between the alpha particle and the krypton atom.
The charge of an alpha particle is the sum of the charges of its two protons, which is equal to 2 times the elementary charge (2e). Therefore, we have:
q = 2e
Substituting the values into the equation for the electric field, we get:
E = (9 × 10^9 N m^2/C^2) × (2e) / (1 nm)^2
E = 7.2 × 10^21 N/C
Substituting the value of the electric field into the equation for the dipole moment, we get:
p = α E
p = (4πε_0)α E
where ε_0 is the permittivity of free space.
Substituting the given value of polarizability and the calculated value of the electric field, we get:
p = (4π × 8.85 × 10^-12 F/m) × (2.48 × 10^-3 nm^3) × (7.2 × 10^21 N/C)
p = 6.48 × 10^-29 C m
Therefore, the resulting dipole moment that the krypton atom attains is 6.48 × 10^-29 C m.
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the number of valence electrons in an element affects the reactivity of that element. which element listed has the fewest valence electrons?
Answers
The element with the fewest valence electrons among the chemical elements listed is: B. Sodium (Na).
Valence electrons can be defined as the number of electrons present in the outermost shell of the atom of a chemical element.
Basically, valence electrons determines whether an atom or group of chemical elements found in a periodic table can bond with others.
This ultimately implies that, the number of valence electrons in a chemical element determines its chemical reactivity with other chemical elements.
In the periodic table, chemical elements that are having the same number of valence electrons are found in the same group (column).
Sodium (Na) has an atomic number of eleven (11) and as such it has one (1) valence electron in its outermost shell.
Beryllium (Be) has two valence electrons.Oxygen (O) has six valence electrons.Neon (Ne) has eight valence electrons.In conclusion, Sodium (Na) is the element with the fewest valence electrons among the chemical elements listed.
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This question is incomplete because it is lacking the necessary answer options, which I have provided below:
A. Beryllium (Be).
B. Sodium (Na).
C. Oxygen (O).
D. Neon (Ne).
The faster rate of reaction was caused by using a higher temperature. Explain, in terms of particles, why a higher temperature causes a faster rate of reaction.
Answers
Answer:
Increasing the temperature a reaction takes place at increases the rate of reaction. At higher temperatures, particles can collide more often and with more energy, which makes the reaction take place more quickly.
Explanation:
Fill in the blank.
When a metal and a nonmetal react, the result is a(n) ______ compound. Ratio of cat ions and anion depends on the ionic charge of each. All ionic compounds come together in the simplest ratio to make a _______ formula unit and the ________ is always written first in the formula.
Answers
Answer:
Iconic, neutral, and cation
Explanation:
When a metal and a nonmetal react, the result is a(n) Ionic compound. Ratio of cat ions and anion depends on the ionic charge of each. All ionic compounds come together in the simplest ratio to make a neutral formula unit and the cation is always written first in the formula.
What is ionic compound ?The ionic compounds are solids in crystalline form and these are formed by opposite charged ion packing, formed by the reaction of metals react with non-metals.
Elements can either gain or lose electrons in order to achieve noble gas configuration and these formation of ions helps them gain stability, the structure of ionic compound depend on the relative sizes of the cations and anions.
Ionic compounds are salts, oxides, hydroxides, sulphides, and the inorganic compounds. Ionic solids are held together by the electrostatic attraction between the positive and negative ions.
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hich option is an ionic compound?
Responses
NO2
upper case N O subscript 2 end subscript
SO3
upper case S O subscript 3 end subscript
CO
upper case C O
LiCl
Answers
NO₂ , SO₃ and CO are covalent compounds and LiCl is ionic in nature.
What are differences between covalent and ionic compounds?The definition of an ionic compound is chemical compound composed of ions which is held together by electrostatic forces i.e. held together by ionic bonds. They are formed by ions of opposite charge. The compound is neutral but it consists of a positively and negatively charged cations and anions.
Ionic bonds transfer electrons, covalent bonds share them more easily .Ionic compounds tend to have higher melting points and boiling points while covalent compounds have lower melting & boiling pointsIonic compounds have more polar molecules and covalent compounds lessOrganic compounds tend to have covalent bondsIonic compounds are usually between metal and a non-metal. Non-metal with non-metal compounds are covalent.Ionic compounds have ions in solution or in molten state and conduct electricityIonic bonds are stronger than covalent bondsIonic compounds tend to be a solid with definite shape at room temperature while covalent compounds are usually gases, liquids or soft solidsIonic compounds often do not dissolve in organic solvents while covalent compounds do.Learn more about ionic compounds at https://brainly.com/question/2687188
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2. A gas container is initially at 40 mm Hg and 77K (liquid nitrogentemperature.) What will the pressure be when the container warmsup to room temperature of 298K?
Answers
ANSWER
The final pressure of the gas is 155mmHg
EXPLANATION
Given that:
The initial pressure of the gas is 40mmHg
The initial temperature of the gas is 77K
The final temperature of the gas is 298K
To find the final pressure, follow the steps below
In the given data, the volume of the container is fixed. Hence, the process is an Isochoric.
Step1: Write the gas law at constant volume
\(\frac{P1}{T1}=\frac{P2}{T2}\)Step 2: Substitute the given data into the formula in step 1 to find P2
\(\begin{gathered} \frac{40}{77}=\frac{P2}{298} \\ \text{ Cross multiply} \\ \text{ 40}\times\text{ 298 }=\text{ 77}\times P2 \\ 11920\text{ }=\text{ 77}\times\text{ P2} \\ \text{ Divide both sides by P2} \\ \text{ P2 }=\frac{11920}{77} \\ P2\text{ }=154.8mmHg \\ P2\approx155mmHg \end{gathered}\)Hence, the final pressure of the gas is 155mmHg
What is 0.0032 gallons in cl
Answers
Answer:
It would be 1.21133177
Explanation:
0.0032 equals in centilitler= 1.21133177
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Mix two liquids together and shake them up. You see that you have microscopic droplets of one liquid suspended in the other. You would call this:
Answers
Answer:
The awnser is cloudy suspension.
As the microscopic droplets of one liquid are suspended in the other, it is a heterogeneous mixtures.
What are heterogeneous mixtures?
Heterogenous mixtures is defined as a type of mixture where in the composition is not uniform throughout the mixture.It consists as two or more phases. The phases are chemically distinct from each other.
As there are two or more phases present in heterogenous mixtures they can be separated by solvent extraction where in one phase is miscible with the solvent and the other phase is immiscible.
Components of a heterogenous mixtures are distinctly visible . There are two types of heterogenous mixtures, the colloids and the suspensions.These two vary with each other with respect to particle size.These are the mixture which are easy to separate out.
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[H+] is _______.
17.8 ×10-9
5.62×10-9
1.78 ×10-6
56.2×10-9 [please hurry i only have 5 minutes
Answers
Answer:
[H+] is 5.62×10-9
Explanation:
can i have brainliest please
Calculate the molality of 12 percent urea solution
Answers
Molality of a solution is defined as the number of moles of solute per kilogram of solvent. The formula for molality is given by the following equation:molality (m) = moles of solute / mass of solvent (in kg)In order to calculate the molality of a 12 percent urea solution, we need to first determine the mass of urea present in the solution.
We know that a 12 percent urea solution means that 12 grams of urea is present in 100 grams of the solution. Therefore, we can calculate the mass of urea in the solution as follows:Mass of urea = (12/100) x 200 g= 24 gNext, we need to convert this mass into moles. The molar mass of urea is 60.06 g/mol. Therefore, the number of moles of urea present in the solution can be calculated as follows:Number of moles of urea = Mass of urea / Molar mass of urea= 24 g / 60.06 g/mol= 0.3996 molFinally, we can use the formula for molality to calculate the molality of the solution as follows:molality (m) = moles of solute / mass of solvent (in kg)= 0.3996 mol / 0.2 kg= 1.998 mol/kgTherefore, the molality of the 12 percent urea solution is approximately 1.998 mol/kg.For such more question on moles
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What does an oxygen atom do when becoming an ion?
Answers
which response provides the best explanation as to why ionic compounds easily dissociate in water? which response provides the best explanation as to why ionic compounds easily dissociate in water? nonpolar organic molecules such as fats and waxes dissolve well in water. the polarity of water allows it to easily dissociate most covalently bound compounds. the polarity of water easily breaks the charges between the oppositely charged ions in the compound. as a polar molecule, water cannot easily dissociate inorganic compounds.
Answers
Option (d) is correct. As a polar molecule, water cannot easily dissociate inorganic compounds.
Ionic compound is defined as a chemical compound composed of ions held together by electrostatic forces termed ionic bonding. The ionic compounds are neutral. It consists of positively charged ions called cations and negatively charged ions called anions. polarity is explained as a separation of electric charge leading to a molecule or its chemical groups having an electric dipole moment with a negatively charged end and a positively charged end. These polar molecules must contain one or more polar bonds due to a difference in electronegativity between the bonded atoms. water cannot easily dissociate inorganic compound due to polarity.
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The complete question is,
Which response provides the best explanation as to why ionic compounds easily dissociate in water?
(a) nonpolar organic molecules such as fats and waxes dissolve well in water.
(b) the polarity of water allows it to easily dissociate most covalently bound compounds.
(c) the polarity of water easily breaks the charges between the oppositely charged ions in the compound.
(d) as a polar molecule, water cannot easily dissociate inorganic compounds.
Which number below cannot be written as a power of 2?
C. 1
A. 32
1
B.
256
D. 6