A scientific law is different from a scientific theory because it describes something in nature without attempting to explain it, this statement is true.
What is difference between scientific theory and scientific law ?A scientific law foretells the outcomes of particular beginning circumstances. It may tell you what color hair your unborn kid would have or how far a baseball will go when fired at a specific angle.In contrast, a theory seeks to offer the best plausible justification for why events take place the way they do.
A scientific law often describes an observable phenomena. It doesn't explain the phenomenon's existence or its origins. A scientific theory is the explanation for a phenomena. It is untrue that with enough study, hypotheses become laws.
Thus, a scientific law is different from a scientific theory because it describes something in nature without attempting to explain it, this statement is true.
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Which element has chemical properties that are most similar to the chemical properties of sulfur, s?.
Answer:
tellurium
Explanation:
Thus, elements under the same group share similar chemical properties. Among the given elements, only tellurium belongs to group 16, and is, hence, the only element among the choices that is similar chemically to sulfur.
(a) indicate which orbitals in the following list fill before the 4p orbitals. 3d 4s 4d 5s (b) what is the maximum number of electrons in the 4s subshell? (c) an electron in an orbital has the following quantum numbers: n
a. In the following list 4s orbital can be filled before 4p orbital.
b. The maximum number of electrons in 4s subshell is 2.
c. An electron in an orbital has 4 quantum numbers n, l, ml, ms.
According to the Aufbau principle, electrons first occupy lower-energy atomic orbitals before moving on to higher-energy ones. Hence 4s orbitals filled before 4p followed by filled d orbitals. similarly the maximum capacity of s subshell to hold electron is 2, while p subshell is 6, 10 for d subshell and 14 for f subshell. Electron in an orbital can be completely described by principle quantum number n which represents the main electronic shell, Azimuthal quantum number l determines an orbital's shape, magnetic quantum number ml defines how many orbits there are and how they are oriented within a subshell and spin quantum number ms describes the spin of electrons.
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I need help with my project!!!!!
Unit Essential Question: How can we harness Earth's energy for our community's needs?
Problem:
We need environmentally-friendly forms of energy.
Wind and solar farms take up lots of space/habitats, and
impact the animals around them.
Challenge
There's a new parcel of land that is being developed in the Antelope
Valley and three companies are bidding on the contract. One company will use solar energy to power the
development, one company plans to use wind power, and your company is using geothermal energy to
power it. Many people don't want to see solar and wind farms for aesthetic reasons and for harm to
natural habitats. So, there's been a growing demand for geothermal energy.
You will be developing a parcel of land with a building that harnesses
geothermal energy from the ground below. You will make a plan and
present it to the class. Create a slides presentation.
Project Criteria for Success:
To prepare for your presentation, discuss the components below. In your presentation, please include the
following:
• A description of your building or development - including what type of building you used (i.e.
school, housing, hospital, church, ranch/farm, park, etc...).
A model (i.e. diagram, physical, or simulation) that describes the forms of energy (i.e. kinetic and
potential energy) involved in your building
how energy (i.e. thermal energy) is transferred in your building
A discussion about the benefits and drawbacks of using geothermal energy in the Antelope Valley
as compared to solar and wind as an energy source.
Answer:
Use a school
Explanation:
You could use a building like a school then you could use the lights as thermal energy then you make up an example of potential energy and when is this assignment due?
which can decrease the presence of air bubbles in carbomers? i. introduce a carbomer into water slowly. ii. sprinkling a sieved powder into the vortex created by slowly stirring the medium. iii. once all powder is added, reduce speed.
Sprinkling a sieved powder into the vortex created by slowly stirring the medium can decrease the presence of air bubbles in carbomers
What is Air bubbles in carbomers?To simulate ebullition from lake sediments, air bubbles are injected into a Carbopol column that has a water cap on top. When the first bubble rises through the carbopol, it creates an invisible path. In contrast to the original bubble, subsequent bubbles rise along this path and split into two distinct bubbles. The smaller breakdown bubble separates and is confined inside the carbopol as the larger leading bubble rises through the water column.
Water from the upper layer progressively fills a conduit that forms above this breakup bubble.
This conduit grows until it reaches an equilibrium depth, at which point it begins to contract. The rising bubbles in the conduit resemble Taylor bubbles but are moving at speeds that are 5-7 times greater than their maximum speed.
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Explain how we can use length to measure mass.
The lenght multiply with the tall and the tichkness
how many atoms in bcc
In a bcc unit cell, there is one atom in the body's center and eight others in each of the cell's eight corners. The unit cell is entirely made up of the atom at the center of the body. Each corner atom contributes one eight to the unit cell. Therefore, 818+1=2 atoms make up the entire number of atoms in the unit cell.
the body-centered cubic is named after the central atom. However, there are eight corners, each of which has a shared atom with seven unit cells nearby. As a result, each corner of the unit cell contains 1/8 of an atom, which adds up to 1 whole atom.
A unit cell is the smallest repeating arrangement of atoms found in a crystal. The body-centered cubic (BCC) unit cell, a third typical metal packing arrangement, includes one atom in the cube's core in addition to atoms at each of its eight corners. The corner atoms in each unit cell will be divided among eight unit cells because each corner atom is the corner of another cube. The central atom and the eight eighths from the corners make up the BCC unit cell's total of two atoms.
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Write a balanced equation for the following word equation:nitrogen dioxide + water + oxygen arrow nitric acid
Answer:
2H2O+4NO2+O2=4HNO3
Explanation:
LEFT HAND SIDE(L.H.S) RIGHT HAND SIDE(R.H.S)
N=1X10X2 =20 N=1X10X2=20
H=2X5X2 =20 H=1X10X2=20
O=1X5X2+10X2X2+2 X5 O=3X10X2=60
=60
First multiply H2O by 2 to get an even no. of oxygen on L.H.S
make a similar chart at every turn to record the changes in number.
then multiply R.H.S by 2 to equate the hydrogen
multiply N by 2 on LHS to equate them.
the no of O changes
Multiply RHS by 2 again,
equate the LHS by multiplying NO2 by 2 again, i.e total 4
you now have the answer
The bond order of any molecule containing equal numbers of bonding and antibonding electrons is ________.
The bond order for any molecule having an equal number of bonding and antibonding electrons is zero.
The "degree" of the bond is best described by the bond order. For instance, the bond order of a triple bond is 3, while the bond order of double bond is 2. One can imagine that each electron contributes to the bonding or antibonding characteristic. Half of the bonding feature is contributed by each electron in a bonding molecular orbital. Half of the antibonding feature is contributed by each electron in an antibonding molecular orbital. Bond order is zero when bonding and antibonding character are equal. Therefore, the bond order is 0 when the number of bonding and antibonding electrons is equal.
Mathematical proof is also possible.
Bond Order: ½(Antibonding electrons - bonding electrons)
When both are equal. Suppose number of both electrons is x then,
Bond Order: ½(x – x) = 0
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Explain how the information from the timuli i communicated to the brain. Pleae Hurry Do not know how to give brainliet but if I figure it out I will try if I have ome. And pleae make ure the anwer i right, Thankyou
We know; Neurons communicate using both electrical and chemical signals.
What is neuron?
The basic building blocks of the brain as well as nervous system are neurons. They are the cells that receive sensory information from the outside world, send motor commands to our muscles, as well as transform and relay electrical signals at each stage along the way. Beyond that, our interactions with them shape who we are as people. However, our approximately 100 billion neurons can interact closely with other cell types that are generally referred to as glia. Neurogenesis, which can occur in adults, is the process of the brain producing new neurons. Consider a neuron as a tree for an effective analogy. Dendrites, axons, and the cell body, or soma, are the three main components of a neuron.
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Subatomic particles can usually pass undeflected through an atom because the volume of an atom is composed of.
Subatomic particles can usually pass undeflected through an atom because the volume of an atom is composed of mostly space.
What are subatomic particles?The positively charged nucleus of an atom is surrounded by a cloud of negatively charged electrons. The electrons are in constant motion, moving around the nucleus in a random pattern. The size of an atom is determined by the size of this electron cloud. Most of the volume of an atom is actually empty space.
Subatomic particles are usually able to pass through an atom undeflected because they are so much smaller than the atom itself. The nucleus of an atom is only a tiny fraction of the size of the atom, and the electrons are even smaller. Subatomic particles can easily pass through the spaces between the nucleus and the electrons.
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Compound X has a relative molecular mass of 88
Deduce the molecular formula of compound X.
Answer:
Explanation:
Butanoic acid С₄Н₈0₂
M = 4·12 + 8·1 + 2·16 = 88
The empirical formula represents the simplest whole number ratio. The molecular formula of the compound X with a relative molecular mass of 88 is Butanoic acid and the molecular formula is C₄H₈O₂.
What is molecular formula?The formula in which the actual number of all the atoms of various elements present in one molecule of the compound is represented is known as the molecular formula.
The molecular formula of a compound is a whole number multiple of its empirical formula.
Molecular formula = n × Empirical formula
Here butanoic acid has the molar mass 88.11 g/ mol and its molecular formula is C₄H₈O₂. It is a straight chain alkyl carboxylic acid and it is an oily colourless liquid. It is also used as a food flavoring agent and a safe food additive.
Thus the compound X is Butanoic acid or Butyric acid.
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Create an energy transformation for a whistling tea kettle on a stove. EX: THERMAL TO ELECTRICAL
Answer: thermal from electrical you would need something to take the heat to electrical energy.
Explanation: it creating heat not electricity
write the balanced equation for this reaction, and explain how it is possible for 10 grams of methane fuel to burn and emit 27 grams of carbon dioxide. discuss whether or not this reaction obeys the law of conservation of mass. source stylesnormalfontsize
The balanced equation is CH4(g)+2O2(g)→CO2(g)+2H2O(g) In the burning reaction, methane (CH₄) reacts with oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O): CH₄ + 2 O₂ → CO₂ + 2 H₂O
This reaction obeys the law of conservation of mass because nothing was created or destroyed just rearranged.
This means that the total mass of reactants and products involved in the equation must be the same. A balanced chemical equation always obeys the law of conservation of mass. According to this law, the mass of the product must equal the mass of the reactants. A chemical reaction is said to be balanced when the total mass of the atoms on both sides of the chemical reaction is equal.
According to this law, both physical and chemical changes follow the law of conservation of mass. Nuclear reactions are the only ones that do not obey the law of conservation of mass. In chemical reactions, atoms are neither created nor destroyed. Reactant atoms simply rearrange to form products. Therefore, there is no mass change in chemical reactions.
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If 250 ml of methane, ch4, effuses through a small hole in 28 s, the time required for the same volume of helium to pass through the hole under the same conditions will be.
Answer: 10s
Explanation:
Ideal gas law is valid only for ideal gas not for vanderwaal gas. To solve such, we need to know the relation between rate of effusion and molar mass of gases. Therefore, the same volume of helium to pass through the hole under the same conditions will be same.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature.
Mathematically the relation between rate of effusion of gases and their molar masses can be given as:
rate of effusion of unknown gas/rate of effusion of methane gas=√molar mass of methane/molar mass of particular gas
The same volume of helium to pass through the hole under the same conditions will be same according to grahams law of diffusion.
Therefore, the same volume of helium to pass through the hole under the same conditions will be same.
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Which of these "curved arrows" describe a mechanism for the formation of a carbocation that has roughly the same stability as this one? HHH - H- C- C 70-I CH H H-C-H Н AA only [B] B only [C] C only [D] B and C only [E] A and C only Explanation for your choice (4 pts)
The correct answer is B and C only.
Nonlinear arrows with barbs on one-stop are used to signify electron waft. A double-barbed arrow suggests the motion of an electron pair, while an unmarried-barbed arrow indicates the movement of an unmarried electron. A full head on the arrow indicates the movement or shift of an electron pair A partial head at the arrow indicates the shift of an unmarried electron.
The factor of the curved double-headed arrow is to expose the movement of an electron pair. They start on the tail and end up at the pinnacle. Arrows are universally acknowledged for indicating guidelines. they may be broadly used on signage and for wayfinding, and are frequently used in avenue surface markings. Upward arrows are frequently used to indicate a growth in a numerical fee and downward arrows suggest a decrease.
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based on their positions in the periodic table, predict which atom of the following pair will have the smaller first ionization energy:
based on their positions in the periodic table, the smaller first ionization energy is calcium
Ionization energy is also called as ionization potential is the amount of energy required to remove an electron from an isolated atom or molecule and by looking at the periodic table the beryllium and calcium are in the same group with beryllium being 2 period above calcium and therefore the calcium has the smaller first ionization energy and first ionization energy of chlorine is 12.9676 eV
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select the single best answer. identify the relationship in the following pair. do the drawings represent constitutional isomers or stereoisomers, or are they just different ways of drawing the same compound? if they are stereoisomers, are they enantiomers or diastereomers? h571915x and h571915b
They are just different ways of drawing the same compound, the following pair are diastereomers.
The given pair of compounds are not constitutional isomers, because constitutional isomers have the same molecular formula but different bond connectivity. But the given pair have the same bond connectivity.
The given pair of compounds are stereoisomers because they have the same molecular formula but the 3D space arrangement is different. And finally, the given compounds are not mirroring images of each other so we call them diastereomers, not enantiomers. As enantiomers are superimposable mirror images of each other. The structures of the given pair of compounds are attached as a picture.
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ayou are trying to determine the age of a lava flow using an isotope with a half-life of 1.5 million years. if the sample has gone through four half-lives, what is the age of the rock?
The age of the rock is 6 million years.
What is a half-life of an isotope?
A radionuclide's half-life is the amount of time it takes for half of its radioactive atoms to decay.
Do all isotopes have a half-life?
All isotopes have a half-life if proton decay is real, but those that are stable in a universe without proton decay will simply live a lot longer than the others.
Why are isotopes measured in half-lives?
Due to an isotope sample's exponential rate of decay over time, the half-life is used as a practical measurement. In a fixed amount of time, each atom is given the same chance of decaying, which causes exponential decay.
Age=4 half lives * 1.4MY/half life
Age=6 million years.
Thus, the age of the rock is 6 million years.
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The following properties are either physical or chemical. Which one is different from the rest based on those two categories? density flammability heat of combustion reactivity.
Density is different from the rest based on those two categories. density is a physical property.
Physical properties can be observed or measured without changing the composition of matter. Physical properties are used to observe and describe matter. Two types of it intensive and extensive properties. This classification relates to the dependency of the properties upon the size or extent of the system or object in question.
An intensive property is a bulk property, meaning that it is a physical property of a system that does not depend on the system size or the amount of material in the system. Examples of intensive properties include temperature, refractive index, density, and hardness of an object.
Chemical properties of matter describes its "potential" to undergo some chemical change or reaction by virtue of its composition. What elements, electrons, and bonding are present to give the potential for chemical change. For example : Metals in general have they chemical property of reacting with an acid.
Flammability - The susceptibility to combustion is a chemical property and the susceptibility to combustion is unknown. Fire tests are performed to determine how difficult or easy it is to burn a particular material.
Heat of Combustion - This chemistry is the amount of energy released as heat when a substance burns with oxygen.
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.
The sarcoplasmic reticulum calcium transport ATPase (SERCA) D351A mutant has the P domain Asp 351 residue replaced by alanine. How would this affect the Ca2 ATPase?
SERCA D351A cannot be phosphorylated by it.
What happens if you have low calcium levels?Calcium deficiency can affect every part of the body, resulting in thin, brittle skin, sluggish hair growth, and brittle nails. Calcium has a critical role in both the neurotransmitter release and indeed the contraction of muscles. As a result, persons who are calcium deficient and otherwise healthy may experience seizures.
What happen if you consume too much calcium?Too much blood calcium can harm your bones, develop kidney stones, and have an impact on how well your heart and brain work. Usually, parathyroid glands that are overactive lead to hypercalcemia. These four tiny glands are situated near the thyroid in the neck.
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80 g of sodium hydroxide reacts with excess sulfuric acid to produce 142 g of sodium sulfate. What mass of sodium hydroxide would be needed in order to make 50 g of sodium sulfate?.
28.16 grams of Sodium hydroxide would be required to make 50 grams of sodium sulfate.
The gram is a unit of mass in the International System of Units (SI) which is equal to one thousandth of a kilogram. Gram is something that is related to the mass as well.
Mass is actually the measure of the amount of matter in a substance or any object. The basic SI unit for mass is the kilogram (kg), but usually the smaller masses may be measured in grams (g). To measure mass, you would use a balance or even a scale.
In the above question it is said that 80 grams of Sodium hydroxide reacts with sulfuric acid to produce 142 grams of sodium sulfate. So then to produce 50 grams of sodium sulfate, the amount of Sodium hydroxide will be;
⇒ 80 × 50 = 28.16 grams
142
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What dose Eph stand for
quantum mechanics, although mathematically complex, does far better in describing polyelectron systems than the bohr equation. how many total quantum numbers are required to describe the behavior of an electron in any system? a. 1 b. 2 c. 3 d. 4 e. 5
Quantum mechanics, although mathematically complex is 4
What is quantum number ?
A total of four quantum numbers are used to fully describe the motion and trajectory of each electron in an atom. The combination of quantum numbers of electrons is described by a wavefunction corresponding to the Schrödinger equation. Each electron has a unique set of quantum numbers. According to Pauli exclusion principle, no two electrons share the same combination of he four quantum numbers. Quantum numbers are important because they can be used to determine the electron configuration of atoms and the putative positions of atomic electrons. Quantum numbers are also used to understand other properties of atoms such as: B. Ionization energy and atomic radius. Atoms have four quantum numbers.
Principal (n), orbital angular momentum (l), magnetic (ml), electron spin (ms).
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Identify What season is the Northern
Hemisphere experiencing in the image above?
Season is the northern hemisphere experiencing in the image above is winter
Northern hemisphere is the half of the earth that lies north of the equator and earth tilted axis causes the season and throughout the year different part of the earth receive the sun most direct rays and so when the north pole tilt toward the sun and when its south pole tilt toward the sun its winter in the northern hemisphere and our northern winter is in dec, Jan and Feb
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Calculate the enthalpy of solution per mole NaOH (s) to form a 1.0 M NaOH solution. The mass of the solution is about 52 g (H2O + NaOH). The specific heat of the NaOH solution is about 3.90 J g-1 °C-1. Show all of your work.
The enthalpy of solution per mole NaOH (s) is 0.075 J.
Enthalpy, belonging to a thermodynamic gadget, is the sum of the machine's inner strength and the made of its stress and volume. it's far a state function used in many measurements in chemical, organic, and bodily systems at a steady pressure, which is without problems furnished by way of the massive ambient environment.
Calculation:-
H = mΔHf
ΔHf = H/m
= 3.90/52
= 0.075
Enthalpy is the quantity of inner electricity contained in a compound while entropy is the amount of intrinsic disorder inside the compound. Enthalpy is zero for elemental compounds consisting of hydrogen gas and oxygen gas; consequently, enthalpy is nonzero for water (no matter segment.
In thermochemistry, the enthalpy of solution is the enthalpy exchange related to the dissolution of a substance in a solvent at regular strain resulting in limitless dilution. The enthalpy of the answer is most usually expressed in kJ/mol at a steady temperature.
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Calculate the number of moles of He atoms present in 5.55 g of He.
2
The number of moles of He atoms present in 5.55 g of He is 1.3 moles
Mole is the SI unit of amount of substance of a specified elementary entity and the the helium is the chemical element and inert gas element
Here given data is
He = 5.55 g
Molar mass of He = 4.0g/mol
So number of moles = 5.55 g of He × 1 mol/4.0g/mol
Number of moles = 1.3 mole
The number of moles of He atoms present in 5.55 g of He is 1.3 mole
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which 2 layers of the earth are made out of rock and what are the 2 not made out of rock
Crust and mantle are the layers made up of rock whereas the inner core and outer core are not made up of rock.
What are the crust and mantle layers of the earth?The mantle is present below the crust which is about 2900 km thick. It comprises hot, dense rocks made up of iron and magnesium. The crust and the upper portion of the mantle make up the lithosphere which is divided into plates that is large and small.
Earth has three layers i.e. the crust, mantle, and core. The crust is made of solid rocks as well as minerals. The mantle layer is present beneath the crust layer which is also mostly made up of solid rocks and minerals as well as semi-solid magma.
So we can conclude that Crust and mantle are rocky layers whereas the inner core and outer core are not.
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in the cytoplasm, some of the lactose is converted into , which binds the site of the lac repressor.
The lac operon is a group of genes that make up an mRNA. These genes are those that allow the consumption of lactose through the proteins of the bacteria, as is the case with E. Coli.
The Lake RepressorThe lac operon is made up of three genes, which constitute the mRNA, that is, the factor responsible for promoting the union and decomposition of lactic acid in bacteria, the process occurs as follows:
The lacZ gene codes for lactose and breaks it down into molecules called monosaccharides.The lacY gene favors the transport of lactose within the bacterium.Once the product reaches the positive regulator, transcription is achieved thanks to the binding of the catabolite-activating protein.For more information about lactose here: https://brainly.com/question/1453722
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The density of WATER is 1gmL. Is the unlabeled clear liquid WATER? Why or why not?
Clo3− draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons. Show the formal charges of all nonhydrogen atoms.
The formal charges of all nonhydrogen atoms are -1.
Solution:-
O 7-4 = 3 O Double bond on one H 5-4 = 1
O-Cl-O 6-7 = -1x4 = -4 N 5-4=1 H-N-H 1-1=0
O 3-4= -1 O O 6-7 = -1(2)=-2 H 1-0=+1
6-6 = 0 1-2 = -1
It will percentage its last valence electron thru a single bond to the terminal oxygen atom. This is in agreement with carbon and hydrogen atoms that each need to form 4 and 1 covalent bonds respectively. because the terminal oxygen atom best has a single covalent bond, it'll have a proper rate of -1.
According to the lewis structure of SO2, The critical atom is sulfur and it is bonded with 2 oxygen atoms thru a double bond. each oxygen atom acquires 2 lone pairs of electrons and the primary sulfur atom has 1 lone pair of electrons.
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