Mathematics and science are formal and exact sciences that are based on logic.
What is math and science?Mathematics is an exact science that studies the properties and relationships between entities through geometric figures and arithmetic with numbers. Mathematics then looks for common patterns that could end up leading to a theory and, if it is verifiable and true, end up being a law, such as the Pythagorean law for example.
In terms of science, it is the comparable knowledge that has been studied, explained, and has helped predict social and natural phenomena in our universe over time. This has been done and verified through the scientific method, making it then a verifiable and true logic.
Therefore, we can confirm that mathematics and science are formal and exact sciences that are based on logic.
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consider the molecule cis-1,2-dibromocyclopentane. which of the following types of isomers does this molecule have?
The molecule cis-1,2-dibromocyclopentane comes under Stereoisomers.
Stereoisomers are molecules that have the same molecular formula, the same atom connectivity, but they differ in the relative spatial orientation of the atoms.
In cis-1,2-dibromocyclopentane, both bromine atoms are on the same "face" of the cyclopentane ring.
the separator breaks down making the process isobaric. will the benzene composition of the liquid leaving the separtor increase, decrease, or stay the same?
The process is isobaric as a result of the separator breaking down. The amount of benzene in the liquid leaving the separator increases, This is also known as isobaric process.
A thermodynamic process known as an isobaric process occurs at a fixed pressure. Greek words "iso" and "baros," which both signify equal pressure, were used to create the phrase "isobaric." Therefore, when the volume is increased or decreased, the constant pressure is obtained.
With the molecular formula C6H6, benzoene is an organic chemical substance. Six carbon atoms linked together in a planar ring, with one hydrogen atom connected to each, make up the benzene molecule. Benzene is a hydrocarbon since it is made up only of carbon and hydrogen atoms.
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explain why there is a difference in percent of mass change of the eggs in the different sucrose solutions.
There is a difference in the rate of mass change because eggs gain mass when kept in hypotonic solution, whereas they lose mass when kept in hypertonic solution.
What is hypertonic and hypotonic solution?Hypertonic solutions contain high concentrations of solutes compared to other solutions. The opposite solution with a lower concentration is called a hypotonic solution. Cells are considered hypotonic when placed in a hypertonic solution.
Hypotonic solution refers to a solution that contains a lesser amount of solute than the solute concentration of another solution through a semipermeable membrane.
Thus, eggs placed in high concentrations of sucrose lost the most weight. So the higher the sucrose concentration, the more water the egg will lose.
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Determine the energy of a photon whose frequency is 5.94 x 10^17 Hz. Answer in units of J
The energy of a photon whose frequency is 5.94 × 10¹⁷ Hz is 3.94 × 10-¹⁶J.
How to calculate energy?The energy of a photon wave can be calculated by using the following formula:
E = hf
Where;
E = energy (joules)h = Planck's constant (6.626 × 10-³⁴J/s)f = frequencyAccording to this question, a photon has a frequency of 5.94 x 10¹⁷ Hz. The energy can be calculated as follows:
E = 6.626 × 10-³⁴J/s × 5.94 x 10¹⁷ Hz
E = 3.94 × 10-¹⁶J
Therefore, 3.94 × 10-¹⁶J is the energy of the photon.
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an ammonia buffer solution contains 0.18 m nh4 and 0.27 m nh3. the pka of ammonium is 9.24. what is the ph of the buffer?
An ammonia buffer solution contains 0.18 m NH₄ and 0.27 m NH₃ the pka of ammonium is 9.24 and the pH of the buffer is 9.41
pH means a measure of how acidic or basic a substances or solution
Here given data is
Pka of NH₄ = 9.24
Concentration of NH₄ = 0.18 M
Concentration of NH₃ = 0.27 M
Then we have to calculate pH =?
The pH of buffer solution can obtain by using the Henderson Hassel Bach equation
pH = Pka + log [base]/[acid]
pH = 9.24 + log [NH₃]/[NH₄]
pH = 9.24 + log [0.27 M[/[ 0.18 M]
pH = 9.24 + log [1.5]
pH = 9.24 + 0.176
pH = 9.41
pH of the buffer is 9.41
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Draw a diagram to show the arrangement of particles in a solid, a liquid and a gas. What can be interpreted from the distance between the constituent particles.
solid(particles are appropriately packed) in solids there is no distance between the constituent particles
liquid(particles are closely packed).
gas(particles move freely) .
What kind of particle configurations can you find in solid, liquid, and gas?In a gas, the particles are evenly spaced out and not in any particular order. There is no regular arrangement of liquid next to one another. solids are regularly arranged and closely packed.
We can infer from the diagram that there is no space between the individual particles that make up solids. Without any intermolecular voids between the individual molecules, it is a completely packed structure.
In contrast, the particles in liquids are more closely packed than those in gaseous fluids, albeit they are more loosely packed than those in solids. We can now observe that there is a significant intermolecular gap between the constituent particles of gases. They are packed more flimsily than
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Why does a pot of water start to steam after it boils?
the heat of the water
Explanation:
water heat boils and starts to mske water vapor.
describe the trend in first ionization energy of Group 18 elements as the atomic number increases
Answer:
First ionization energy decrease
a vessel contains 0.611 grams of butane gas (c4h10(g)) and molecules of oxygen gas. after the butane is reacted with the oxygen, how many molecules of co2(g) are formed and what is the theoretical yield of water?
0.936g is the theoretical yield of water
CO2 molecules = moles x Avogadro's number.
= 01034644x 6.022x1023
(2·0866 X 1022] (approx)
1 moles of O2 produce 6 moles of 420 from breath.
Theoretical 4x01060627 yield of H2O = Males of H2O X Molar Mass = 0.060627 moles of 02 generate.
= 0.051966 moles
10.051966 X 18.01528
0.936g
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Please help me I've been stuck on this for hours at this point don't bother providing an explanation I need answers
Answer:
I'm not entirely sure about questions 3-5, but I am going to assume you want the products.
3. [tex]Al + O_{2} = AlO_{2}[/tex]
4. [tex]2 Mg + Zn(NO_{3})_{2} = 2 Mg(NO_{3}) + Zn[/tex]
5. [tex]BaCl_{2} + Na_{2}SO_{4} = BaSO_{4} + 2 NaCl[/tex]
As for questions 6-8, it is quite simple,
6. Synthesis Reaction
7. Single Displacement Reaction or another name is Substitution Reaction
8. Decomposition Reaction
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The shore of Lake Assal in Djibouti is the lowest point on land in Africa. This point is 153 meters below sea level. Using equations 10.3 and 10.4, the temperature required to boil water on the shore of Lake Assal would be
The shore of Lake Assal in Djibouti is the lowest point on land in Africa. This point is 153 meters below sea level. Using equations 10.3 and 10.4, the temperature required to boil water on the shore of Lake Assal would be 82.6 degrees.
What is sea level?Sea level is described as an average surface level of one or more among Earth's coastal bodies of water from which heights such as elevation may be measured.
Sea level rise is as a result of two primary factors related to global warming:
the added water from melting ice sheets and glaciers, and the expansion of seawater as it warmsWe are going to use the formula that says "Fahrenheit is equal to 9/6 times C plus 32.
where c = 32
Fahrenheit = 9/6 * 28.1 + 32
Fahrenheit = 82.6 degrees.
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when a 30.0 ml sample of a 0.461 m aqueous nitrous acid solution is titrated with a 0.467 m aqueous barium hydroxide solution, what is the ph at the midpoint in the titration?
The pH at midpoint in the titration will be 3.16
The pH at the midpoint of the titration (the half-equivalence point) will be equal to the pKa of nitrous acid i.e. 3.16. The calculation is quite simple as the Ka value is 4.0 x 10^-4. To find pKa = -log Ka.
Thus, pKa = -log (4.0 x 10^-4) = 3.16
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what is minimal concentration of chloride ion (in m) to form pbcl2 precipitate when solid nacl is added to 0.0049 m lead(ii) nitrate solution? ksp(pbcl2)
The minimal concentration of chloride ion is 1.67 × 10 ⁻³ M
Concentration is the abundance of a constituent divided by way of the overall volume of an aggregate. several sorts of mathematical descriptions may be outstanding: mass concentration, molar concentration, variety concentration, and extent awareness.
The concentration of a substance is the quantity of solute found in a given amount of solution. Concentrations are normally expressed in terms of molarity, defined because of the variety of moles of solute in 1 L of answer.
The Concentration of an answer is a measure of the quantity of solute that has been dissolved in a given amount of solvent or answer. A concentrated answer is one that has a rather huge quantity of dissolved solute.
calculation:-
2NaCl + Pb ⁺² ------------> PbCl₂
Ksp = [Pb⁺][Cl⁻]²
[Cl⁻] = [tex]\sqrt{ \frac{Ksp}{[Pb+]}[/tex]
= [tex]\sqrt{ \frac{1.4×10^{-8} }{0.0049}[/tex]
= 1.67 × 10 ⁻³ M
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Complete the notation configuration for Neon.
The electronic configuration of an element represent the filling of electrons in various orbitals or subshells. The configuration of the element neon is 1s² 2s² 2p⁶.
What is neon?Neon is 10th element in periodic table. It is a noble gas also called an inert gas since the inert gas group that is group 18 gases are commonly unreactive. The group members are neon, argon, krypton, xenon and radon.
The elements in group 18 have the general electronic configuration for valence electrons ns² np⁶. Therefore, they have a completely filled orbital and attained octet which means they are all highly stable.
Neon have 10 electrons and these electrons are arranged in orbitals in the increasing order of energy levels. Thus its electronic configuration is 1s² 2s² 2p⁶.
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what is the ph of a buffer with 0.462 m acetic acid and 0.355 m acetate. the ka for acetic acid is: 1.8 x 10-5
A buffer with 0.462 m acetic acid and 0.355 m acetate has a pH of 4.6. The acetic acid ka value is 1.8 x 10-5.
Buffer solution: What is it?The pH of a buffer solution won't change when small amounts of an acid or an alkali are added.
Simply put, a buffer solution that is acidic has a pH that is lower than 7. Acidic buffer solutions are normally made using a weak acid and one of its salts, frequently a sodium salt.
Alkaline buffer solution has pH higher than 7. The most common method for producing alkaline buffer solutions is to combine a weak base with one of its salts.
pH = -logKa + log([C₂H₃O₂⁻] / [HC₂H₃O₂])
ph = -log(1.8 × 10⁻⁵) + log(0.355 M / 0.462 M)
ph = 4.6
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The table shows the nature of the reactants and products formed in a certain type of chemical reaction. Nature of Reactants and Products Reactants Products Ionic compound + Ionic compound Ionic compound + Ionic compound Which of the following is true about this type of chemical reaction? Question 5 options: It is a single replacement reaction, and all four compounds are different. It is a double replacement reaction, and all four compounds are different. It is a single replacement reaction, and each compound has the same set of ions. It is a double replacement reaction, and each compound has the same set of ions.
Based o the nature of the reactants and products:
It is a double replacement reaction, and all four compounds are different; option B is correctWhat is the chemical reaction?A chemical reaction is a reaction that results in changes in the chemical properties of substances.
A chemical reaction results in the formation of new products.
There are several types of chemical reactions such as:
Single replacement reactions - this is a type of reaction in which one element replaces the radical in another chemical compound.This is illustrated as follows: AB + C ---> AC + B
Double replacement reactions - this is a type of reaction in which the negative radicals in two chemical compounds are exchanged between the metallic or positive radicals in each chemical compound.This is illustrated as follows: AB + CD ---> AC + BD
Hence, two ionic compounds react to produce two iob=nic compounds.
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What is another name for the activation energy barrier in a reaction?
A.
transition state
B.
changing state
C.
top of reaction
D.
needed energy
Please help me.
For an electron to change from an excited state to a ground state, it must
Answer:
An atom changes from a ground state to an excited state by taking on energy from its surroundings in a process called absorption. The electron absorbs the energy and jumps to a higher energy level. In the reverse process, emission, the electron returns to the ground state by releasing the extra energy it absorbed.
calculate the temperature (in k) at which 0.0938 mol of o2 has a pressure of 740 torr in a 1.0l container.
The temperature (in k) will be 126.509 K
Number of moles of Oxygen = 0.0938 mol
Pressure = 740 torr or 98658.6 Pa
Volume = 1.0 L or 0.001 m3
Temperature in K = ?
To find out the temperature (T) we use the ideal gas equation
PV = nRT
As we have to find the temperature so rearrange the equation for T
T = PV / nR
value of R = 8.314 J/mol.K
Put the values in the equation
V = 98658.6 * 0.001 / 0.0938 * 8.314
V = 0.000974 / 0.779853
V = 98.6596 / 0.779853
V = 126.509 K
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what is the molarity of an aqueous solution that is 5.88% nacl by mass? (assume a density of 1.02 g/ml for the solution.) (hint: 5.88% nacl by mass means 5.88 g nacl/100.0 g solution.)
The polarity equation is given, masks are divided by smaller mosques, and all are divided by the volume of solution in liters.
As a result, we will obtain a number closer to 1.49. Thus, the original solution's polarity is as follows.
What is the meaning of Molarity ?The amount of a substance in a specific volume of solution is known as its molarity (M). The number of moles of a solute per liter of a solution is known as molarity. Molarity is defined as the number of moles of solute per liter of solution.
The moles of solute per liter of solution is measured as molarity. For instance, when table salt is dissolved in water, water serves as both the solution and the solute. Sodium chloride weights 58.44 grams per mole. One liter of water and 58.44 grams of sodium chloride combine to form one molar solution, or 1M.
100 g of a solution Additionally, it is assumed that the starting density is 1.02 grandpa. We can therefore determine the volume or solution from this information. Volume of the solution is therefore equal to the solution's mass divided by its city. So we have 100 g of solutions here. Therefore, 100 g make up the majority of the solution. Divided by the solution's density, 1.02 grandpa is obtained. The result will be 98.04 cm. The volume motor solution is now available. Next, we may determine the initial solution's polarity. As a result, we have the polarity equation, which is provided as smaller mosque divided by masks.
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Surprisingly, dipole-diple is not the predominant intermolecular force between ibr molecules in liquid ibr. Based on this information, what must be the main imf for ibr?.
Dipoles are not the dominant intermolecular forces between IBr molecules in liquids. IBr is a covalent bond.
A covalent bond is a chemical bond that requires the sharing of electrons to form electron pairs between atoms. The constant balance between attractive and repulsive forces between atoms according to their share of electrons is called a covalent bond.
Covalent bonds are much more common in natural chemistry than ionic bonds. A covalent bond is the simultaneous attraction of the nucleus to one or more electron pairs. Covalent compounds generally have low boiling and melting factors and are determined in all three body states at room temperature. Covalent bonds no longer conduct electricity; This is because covalent compounds no longer have charged particles that can carry electrons.
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50 POINTS
Which chemical formula most likely describes ozone?
O A. O
OB. 03
OC. 0₂
O D. 000
Answer:
B
Explanation:
Ozone (O3) is a gas which is present naturally within Earth's atmosphere. It is formed of three oxygen atoms (giving it the chemical formula, O3).
if he gas has an average kinetic energy of 6950 j/mol6950 j/mol under certain conditions, what is the root mean square speed of o2 gas molecules under the same conditions
The root mean square speed of O₂ gas molecules under the same conditions is 521.04ms⁻²
Kinetic energy is the energy an object has because of its motion
Here given data is
He gas = 6950 j/mol
We have to find root mean square = ?
So the formula is to find root mean square is
Vrms = √RT/m
Vrms = RMS velocity of the gas
T = absolute temprature of the gas
M = molar mass of the gas
R = universal gas constant
So, average molar kinetic energy of gas
E = 1/2 mv²rms = 1/2 RT
This equation reveal that molar KE is independent of the nature of the gas and it only depends on temprature as ideal behavior is concerned and so both He and O₂ will have same KE = 6950 j/mol and under the same condition of temprature
So for O₂
1/2 m O₂ V²rmsO₂ = 6950 j/mol
Taking atomic mass of O₂ = 16g/mol
V²rmsO₂ = 6950 × 2/2×16g/mol
VrmsO₂ = √69500000/16g/mol
VrmsO₂ = 521.04ms⁻²
Root mean square speed of O₂ gas molecules is 521.04ms⁻²
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what happens to the solubility of mgco3 in water if 0.1 m hno3 is added to the solution at 298 k? (ksp
The solubility of MgCO3 in water will increase if 0.1m HNO3 is added to the solution at 298k.
Magnesium carbonate (MgCO3) is basic in nature and insoluble in water but when 0.1m HNO3 (acidic) is added the MgCO3 will dissociate due to the opposite nature that is MgCO3 is basic and HNO3 is acidic. This will lead to an increase in solubility. The balanced equation of this reaction is:
MgCO 3 (s) + 2 HNO 3 (aq) → Mg(NO 3) 2 (aq) + CO 2 (g) + H 2O (l)
The equilibrium constant for the dissolution of a solid substance into an aqueous solution is the solubility product constant. Ksp is used to represent it.
A type of equilibrium constant, the solubility product's value changes with temperature. Due to increasing solubility, Ksp often rises as temperature rises.
A substance's ability to dissolve in a solvent to create a solution is known as a substance's solubility. Ionic compounds, which separate into cations and anions, have a wide range of solubilities in water. While other substances are exceedingly insoluble, some are highly soluble and may even absorb moisture from the air.
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what is the estimated effective nuclear charge, zeff, experienced by an electron in a 3p orbital of a chlorine atom?
The estimated nuclear charge on an electron in a 30 orbital of chlorine atom is 6.1
The charge that the outermost valence electrons of any many-electron atom experience is known as the effective nuclear charge. This is done by taking into account how many shielding electrons there are surrounding the nucleus. Rule of Slater: The effective nuclear charge that an electron in a multi-electron atom experiences is measured using this method. This rule states that the screening effect of the other electrons in the atom causes the actual nuclear charge an electron experiences to be smaller than the actual nuclear charge. An atom's distribution of electrons within its atomic orbitals is known as its electronic configuration.
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1. explain in your own words the debye model for heat capacity. what assumptions are made? how does the fermi level play a role? what are the significance of the debye frequency and debye temperature? how is the process of heat conduction similar/different for metals, semiconductors, and dielectrics? what about the ambient conditions?
The Debye model is a model used to estimate the heat capacity of a solid. The model is based on the assumption that the solid consists of a collection of harmonic oscillators.
The Debye frequency is the frequency at which an oscillator oscillates when it is subjected to a force. The Debye temperature is the temperature at which the Debye frequency is equal to the thermal energy. The Debye model can be used to estimate the heat capacity of a metal, semiconductor, or dielectric.
The heat capacity of a metal is typically higher than the heat capacity of a semiconductor or dielectric. The heat capacity of a metal is also typically higher than the heat capacity of a dielectric. The heat capacity of a semiconductor is typically lower than the heat capacity of a dielectric.
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write the lewis structure for carbon dioxide, then answer the following questions: 1. how many valence electrons does this compound have? 2. how many bonded electrons does this compound have? 3. how many lone pairs of electrons does this compound have? 4. how many single bonds does this compound have?
Valence electrons in CO₂ = 16
Bonded electrons in CO₂ = 4 electrons of carbon and 2 electrons of each oxygen atom
Lone pairs of electrons in CO₂ = 2 l0ne pair of electrons on each oxygen atom
Single bonds in CO₂ = None
What is Lewis structure?A Lewis structure, also known as, Lewis dot structure, electron dot structure, is a diagram showing the bonds between the atoms of a molecule and the lone pairs of electrons present within the molecule.
Carbon dioxide is a colorless, odorless, non-flammable gas produced when carbon is burned. The ratio of carbon to oxygen in the CO₂ molecule is 1:2. Two double bonds join the carbon and oxygen atoms in the Lewis structure. There are two oxygen atoms at each end where they share electrons and form a bond with the central carbon atom. A Lewis structure diagram shows the number of valence electrons available for bond formation within an atom. You can also visualize the behavior of valence electrons in molecules and determine if lone pairs are present.
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quora what situations can you think of that compounding monthly will benefit you more than compounding continuously?
Daily compounding beats monthly compounding. The shorter the compounding period, the higher your effective yield is going to be.
When interest from the previous day is added, the interest earned each day on your savings account balance is known as daily compound interest. Any frequency plan, ranging from daily to yearly, can be used to compound interest. Interest is accrued daily and paid out monthly on all bank accounts from Marcus by Goldman Sachs. The formula for calculating monthly compounding is the principle amount multiplied by one plus the interest rate divided by a number of periods, which is raised to the power of the number of periods. Lenders frequently prefer to present interest rates compounded monthly instead of annually. The interest amount is obtained by deducting that sum from the principal amount.
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How could you determine the density of your own body?
Answer:
Divide the body mass by the body volume to determine density.
:
What is the volume of a nugget of gold that has a mass of 93,300g?
Answer:
4834.20 ml or 4.8342 L
Explanation:
Gold has density of 19.30 g/ml
so according to d = m/V
V = m/d = 93,300/19.30 = 4834.19689119 = 4834.20 ml or 4.8342 L
The volume of nuggets of gold that has a mass of 93,300g is 4834.20 ml or 4.8342 L.
What is volume?Volume is the space occupied by a three-dimensional object.
Density is the mass per unit volume. Density is a scalar quantity. It is denoted by d and the symbol for density is given as rho, a Greek symbol. Density is calculated as mass divided by volume.
Density is directly proportional to mass and inversely proportional to volume. Thus, with an increase in density, mass increases and volume decreases, and vice-versa
Gold has a density of 19.30 g/ml
so according to density = mass/ volume
V = m/d = 93,300 / 19.30 = 4834.19
4834.20 ml or 4.8342 L
Therefore, the volume of nuggets of gold that has a mass of 93,300g is 4834.20 ml or 4.8342 L.
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