An Environmental Impact Study is used to provide a sufficient level of detail to demonstrate that a proposed development will have no negative impacts on the natural features or ecological functions of the subject and surrounding (“adjacent”) lands. Hope this helps!!!
You just found a metallic object in a creek bed. From the following tests and Figure 2, determine what it is.
96.5g will balance the object. Its mass is g.
The object displaces 5 mL of water. Its volume is cm 3.
The density of the object is g/cm 3.
The object you found in the creek is
Answer:
mass: 96.5 g
volume: 5 cm^3
density: 19.3 g/cm^3
The object you found in the creek is a gold nugget
Explanation:
If a mass of 96.5g will balance the object in a pair of scales, then its mass is 96.5 g.
If the object displaces 5 mL of water when you introduce it in some vessel, then its volume is 5 cm^3 (notice that mL and cm^3 are numerically equal).
The density of an object is the quotient between mass and volume, then the density of the object is: 96.5 g/5 cm^3 = 19.3 g/cm^3
From its density it can be deduced that the object is a gold nugget.
The density value can provide clues about the material composing the object, as different substances have different densities.
What is mass, volume and density?Mass: Mass refers to the amount of matter an object contains.
Volume: Volume is the amount of space occupied by an object. It is usually measured in cubic centimeters (cm³) or milliliters (mL). In the given scenario, the object displaces 5 mL of water, indicating that its volume is 5 cm³.
The equation for density is:
Density = Mass / Volume
In the given scenario, the density of the object can be calculated once its mass is determined.
Divide the mass (in grams) of the object by its volume (in cubic centimeters) will give the density (in grams per cubic centimeter, g/cm³).
To identify the object, it would be necessary to compare its density with known densities of various substances. The density value can provide clues about the material composing the object, as different substances have different densities.
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What state of matter can be compressed?
A. Solids
B. Liquids
C. Gases
D. Solids, Liquids, and Gases
A. Gases
The state of matter that can be compressed is gas.
Answer:
Gases (C)
Explanation:
I took the test
What is spring tide and neap tide? How are they different from daily tides?
Spring tides occur during new and full moon phases, with Earth, sun, and moon aligned, causing high tidal range. Neap tides occur during quarter moon phases, with sun and moon at right angles, resulting in smaller tidal range. The proximity of the moon to Earth explains its dominant effect on tides compared to the sun.
Spring tides occur when the Earth, sun, and moon align during the new moon and full moon phases, resulting in a combined gravitational pull that causes very high and low tides. The tidal range during spring tides is the greatest. On the other hand, neap tides happen during the first and third quarter moon phases when the sun and moon are at right angles to each other, leading to a cancellation of their combined gravitational effects and resulting in a smaller tidal range.
The reason why the gravitational pull of the sun on tides is less effective than that of the moon is due to the moon's proximity to Earth; despite the sun's larger size and stronger overall gravity, the moon is closer, thus exerting a greater influence on Earth's tides.
Tides do not occur at the same time every day because the moon rises approximately 50 minutes later each day, and as a result, high and low tides are shifted in time as well. The type of tides experienced in different geographical locations (diurnal, semi-diurnal, or mixed) and their size can also be affected by other factors such as amphidromic circulation, which is caused by the Earth's rotation and other local conditions.
Why do metals have delocalised electrons?
Metals have delocalized electrons due to the nature of their atomic structure and bonding. In metallic bonding, the valence electrons are not bound to a single atom but are shared among all the atoms in the metal. This sharing creates a sea of electrons that is free to move throughout the metal.
Here's the explanation and logic behind this phenomenon:
1. Atomic Structure of Metals: Metals are characterized by having one, two, or three valence electrons in their outermost shell. These electrons are loosely held and can be easily removed or shared.
2. Metallic Bonding: In a metal, the positively charged metal ions are held together by the negatively charged electrons. Unlike ionic or covalent bonds, which involve the transfer or sharing of electrons between specific atoms, metallic bonds are formed by the attraction between the metal cations and the delocalized electrons that surround them.
3. Delocalization: The valence electrons in a metal are not localized between specific atoms but are instead spread out over the entire metal lattice. This delocalization is energetically favorable because it allows the electrons to move freely and occupy a range of energy levels.
4. Energy Bands: In metals, the atomic orbitals overlap to form energy bands. The valence electrons occupy the highest energy band, which is only partially filled. Because of this, electrons can easily gain energy and move within this band, leading to high electrical and thermal conductivity.
5. Mobility of Electrons: The delocalized electrons can move freely throughout the metal. When an electric field is applied, these electrons can drift in a particular direction, resulting in an electric current. Similarly, when heat is applied, the electrons can carry the thermal energy throughout the metal.
6. Strength and Malleability: The delocalized electrons also contribute to the strength and malleability of metals. The sea of electrons holds the metal ions together, allowing the ions to slide past each other without breaking the metallic bond, which is why metals can be hammered into different shapes without shattering.
In summary, metals have delocalized electrons because the atomic structure and the type of bonding in metals favor the sharing of valence electrons across the entire lattice, creating a mobile sea of electrons that is responsible for the characteristic properties of metals, such as conductivity, luster, and malleability.
What is the geocentric model? What is the heliocentric model? What observations and questions were asked that the geocentric model could not explain? Why is the heliocentric model not correct? What parts of the geocentric model were incorporated into the heliocentric model? What are the two main factors that affect gravity’s influence? What is Newton’s law of universal gravitation? The three things to remember about gravitational forces in space are: 1. 2. 3.
Answer:
1. A model in the universe in which the sun, moon, stars, and planets all revolve around Earth.
2. Why did stars and planets get brighter at different times of the year if they were all moving in perfect circles around the earth? Why do some planets seem to stop and reverse direction in the sky?
3. Not all astronomical bodies revolve around Earth. Only the moon orbits earth, but that's all. In fact, Earth revolves around the sun just like all the other planets.
4. The parts about the planets revolving around something and the fact that they revolve.
5. Mass and distance.
6. The law of universal gravitation states that every mass attracts other masses with a force that is directly proportional to the product of the two masses and is inversely proportional to the square of the distance separating them.
7.
1. All objects with mass (no matter how small) exert a gravitational attraction.
2. The more massive an object is, the stronger its gravitational force.
3. The greater the distance between the objects, the weaker the gravitational force.
Explanation:
Match the term with the definition. gas solid plasma Liquid takes the shape and volume of an entire container. charged particles that do not have a definite shape or volume. assumes the shape of the part of the container from the bottom up. has a fixed volume and shape
Answer:
Liquid: D) Assumes the shape of the part of the container from the bottom up
Plasma: B) Charged particles that do not have a definite shape or volume
Solid: C) Has a fixed volume and shape
Gas: A) Takes the shape and volume of an entire container
The correct pairings are:
- Gas: Charged particles that do not have a definite shape or volume.- Solid: Has a fixed volume and shape.- Plasma: Assumes the shape and volume of an entire container.- Liquid: Takes the shape of the part of the container from the bottom up.How to get the pairsHere are the matches between the terms and their definitions:
1. **Gas**: Charged particles that do not have a definite shape or volume.
2. **Solid**: Has a fixed volume and shape.
3. **Plasma**: Assumes the shape and volume of an entire container.
4. **Liquid**: Takes the shape of the part of the container from the bottom up.
So, the correct pairings are:
- Gas: Charged particles that do not have a definite shape or volume.
- Solid: Has a fixed volume and shape.
- Plasma: Assumes the shape and volume of an entire container.
- Liquid: Takes the shape of the part of the container from the bottom up.
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The molecule CCl4 contains one double bond and three single bonds.
Answer is: false, carbon tetrachloride contains four single bonds.
Carbon tetrachloride or tetrachloromethane (CCl₄) is an organic nonpolar compound.
Electron configuration of carbon atom: ₆C 1s² 2s² 2p².
Electron configuration of chlorine atom: ₁₇Cl 1s² 2s² 2p⁶ 3s² 3p⁵.
Chlorine atoms have one unpaired electron, carbon atom is sp3 hybridized (has four unpaired electrons).
False, The molecule CCl4 contains only four single bonds.
Explanation:There are only four single covalent bonds in CCl4. One carbon atom makes 4 covelent bonds with 4 chlorine atoms.PLEASE PICK ONE THE SECOND IMAGE IS AN EXAMPLE! XD
IS THE LAST IMAGE CORRECT
How many moles are present in 16.2 g of lead?
Hello!
To find the number of moles present in 16.2 grams of lead, we need to know how much one mole of lead weighs.
1 mole is equal to the atomic mass of an element, so, 1 mole of lead is equal to about 207.2 grams.
To find that, divide the given amount of lead by 1 mole of lead (207.2 grams).
16.2 grams / 207.2 grams ≈ 0.07818
Therefore, the amount of moles present in 16.2 grams of lead is about 0.078 moles. (round to amount of sigfigs: 0.0782 moles)
HELP PLEASE !!!!!!!!!!!
Select the electron domain geometry that results in a bent molecular shape. Check all of the boxes that apply.
linear with two atoms and zero lone pairs
trigonal planar with three atoms and zero lone pairs
trigonal planar with two atoms and one lone pair
tetrahedral with three atoms and one lone pair
tetrahedral with two atoms and two lone pairs
Answer:
D
Explanation:
Edge trust me
The electron domain geometries that result in a bent molecular shape are:
Trigonal Planar with two atoms and one lone pairTetrahedral with two atoms and two lone pairsWhat is a bent molecular shape?A bent molecular shape occurs when there are two bonded atoms and one or more lone pairs around the central atom.
A common example of a molecule with a bent shape is water. In a water molecule, the central oxygen atom is bonded to two hydrogen atoms and has two lone pairs of electrons, resulting in a bent molecular shape with a bond angle of approximately 104.5 degrees.
Thus, the shapes are;
Trigonal Planar with two atoms and one lone pair
Tetrahedral with two atoms and two lone pairs.
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what are the rules for writing the symbols of an elements
Hello!
Each element on the periodic table ALWAYS begins with an UPPERCASE letter, for example, hydrogen is written as H.
If the element has two letters, for example lithium, then the first letter is UPPERCASE, and the next letter is LOWERCASE. This is shown as Li.
If there's two or more elements (also known as a compound), (ex. sodium chloride), then it follows the same rules, the first letter is in UPPERCASE and next letter is LOWERCASE, but when a new element is introduced (in this case chlorine), the first letter is UPPERCASE and the next letter in LOWERCASE. Sodium is Na and Chlorine is Cl. As a compound it is NaCl, and it's name is sodium chloride.
Basic rules:
First letter of any element is UPPERCASESecond letter of any element is LOWERCASE If it is a compound, then each different element follows the rules like 1 and 2The rules for writing the symbols of elements in chemistry are based on abbreviations derived from common names or other languages, with most symbols having one or two letters. The first letter of the symbol is capitalized to avoid confusion with other notations.
Explanation:The rules for writing the symbols of elements in chemistry are as follows:
A chemical symbol is an abbreviation used to indicate an element or an atom of an element.Most symbols have one or two letters, but three-letter symbols are used for elements with atomic numbers greater than 112.Only the first letter of a symbol is capitalized to avoid confusion with other notations.The symbols of some elements are derived from their common names, while others are abbreviations of the name in another language or Latin.Learn more about Chemical Symbols here:https://brainly.com/question/9249660
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What happened to the moon and earth if the sun did not exist
Anything in orbit around the Sun is basically moving fast enough to be in a constant state of freefall towards it. If the planets, for example, suddenly stopped moving they would immediately be pulled towards the Sun and fall into it.
minerals with the silicon-oxygen structure shown in Figure 2-1 are classified into what group?
A. Sulfates
B. oxides
C. carbonates
D. silicates
what is the effect of 1 mol dm-3 hydrochloric acid on a bulb? Explain why this effect happens.
A 1 mol dm-3 hydrochloric acid will likely not have a notable effect on a bulb unless the bulb is in direct contact. Hydrochloric acid is generally used for reactions with metals, but if the bulb contains metals then this can cause corrosion.
Explanation:The effect of 1 mol dm-3 hydrochloric acid on a bulb would most likely not be substantial unless the bulb was physically placed in the acid. The point of your question appears to be concerning a reaction between hydrochloric acid and some form of material. Hydrochloric acid is a strong acid that is widely utilized in industries for the production of metal chlorides, dyes, glue, and glucose, among other substances. When it reacts with metals, a reaction occurs to form a salt and hydrogen gas. However, in the context of an electric bulb, unless the bulb is made of a specific material that reacts with HCl, there may not be a significant change. It's important to keep in mind that hydrochloric acid is corrosive and can cause damage to the surface of the bulb, particularly if it's made of metal or contains metal elements.
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Nancy wants to find out how the steepness of a hill's slope affects the amount of soil that erodes from it. She has soil, a long pan, and a pile of books with which to build a model hillside. She has a watering can to model rainfall. In her experiment, which of the following factors should Nancy make sure that she does not change?
As from the given information Nancy's aim is to find the steepness of a hill's slope which will affect the amount of soil that erode from the surface so, the variable that should not be changed in this experiment should be the height of the long pan. The height of the long pan is made using the blocks of books on which the end of the pan is balanced. This should remain uniform and constant throughout the experiment so that other variables of the experiment can be altered and the results can be verified accordingly.
Answer:the amount of water she pours on the model
Explanation:
Arrange the molecules in order from strongest intermolecular force to weakest.
-C2H6
-C4H10
-CH4
-C3H8
Answer:- [tex]C_4H_1_0>C_3H_8>C_2H_6>CH_4[/tex]
Explanations:- Alkanes are non polar molecules as these only have carbons and hydrogens. Electron negativity difference of C and H is very low and it makes them non polar. These have weaker London dispersion forces.
The forces of attraction becomes stronger in alkanes as the number of carbon increases because the surface area as well as molecular weight of the alkanes increases with an increase in number of carbons.
Butane has four carbons, propane has three carbons, ethane has two and methane has only one carbon, So, the strongest to weakest order of inter molecular forces is butane > propane > ethane > methane .
Answer:
The answer is C4H10-C3H8-C2H6-CH4
Explanation:
100% CORRECT
Please help so I can study I am also giving brainest anwer
What happens when metals and nonmetals react?
No electrons are shared or move.
Electrons move from the metals to the nonmetals.
Electrons move from the nonmetals to the metals.
Electrons are shared equally.
B. Electrons move from metals from nonmetals creating ionic compounds.
Which activity best demonstrates Ernest Rutherford’s creativity?
with his well-known gold foil experiment in which he demonstrated that the atom has a tiny and heavy nucleus.
Ernest Rutherford's most creative activity was his gold foil experiment conducted in 1909. This experiment demonstrated the structure of an atom, challenging existing models and earning Rutherford the title of 'father of nuclear physics'.
Explanation:The activity that best demonstrates New Zealand physicist Ernest Rutherford's creativity is his gold foil experiment conducted in 1909. In this groundbreaking experiment, Rutherford and his colleagues bombarded a thin sheet of gold foil with a beam of high-energy alpha particles obtained from radioactive decay of radium. He then observed the subsequent velocities and trajectories of the particles, a method that led to revelations about the nuclear structure of the atom.
Rutherford's experimental design illuminated the small and dense nature of atomic nuclei. Rutherford placed a radioactive source in a lead container, producing a beam of alpha particles that struck a thin gold foil. The scattering of the alpha particles, observed by the glow they caused when they hit a phosphorescent screen, challenged existing beliefs about atomic structure. His seminal experiments with nuclear radiation and atomic structure earned him the title of "father of nuclear physics" and helped him win a Nobel Prize in Chemistry in 1908.
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How many moles of Boron (B) are in 5.03 x 1024 B atoms?
Hey there!:
Number of moles = ( number of atoms / 6.023*10²³ atoms )
given number of atoms = 5.03*10²⁴
Therefore:
Number of moles B = 5.03*10²⁴ / 6.023*10²³
Number of moles B = 8.35 moles
Hope that helps!
Which process transfers heat from a hot pavement to a person sitting on it?
conduction - the transfer of heat to an object through contact
Answer: Conduction
Explanation:
When the Moon is positioned between the Sun and Earth, we are seeing a __________ moon. A) new B) full C) half D) crescent
When this happens, you are seeing c) a new moon. You won't be able to see the moon.
What is the theoretical yield of Li3N in grams when 12.8 g of Li is heated with 34.9 g of N2?
Answer:- 21.4 grams of [tex]Li_3N[/tex] are formed.
Solution:- The balanced equation is:
[tex]6Li+N_2\rightarrow 2Li_3N[/tex]
From this equation, lithium and nitrogen reacts in 6:1 mol ratio. Limiting reactant gives the theoretical yield of the product. We will calculate the grams of the product for the given grams of both the reactants and see which one of them gives the limited amount of the product. This limited amount of the product will be the theoretical yield.
The molar mass of Li is 6.94 gram per mol and for [tex]N_2[/tex] It is 28.02 gram per mol. The molar mass of [tex]Li_3N[/tex] is 34.83 gram per mol. The calculations for the grams of the product for given grams of both the reactants are shown below:
[tex]12.8gLi(\frac{1molLi}{6.94gLi})(\frac{2molLi_3N}{6molLi})(\frac{34.83gLi_3N}{1molLi_3N})[/tex]
= [tex]21.4gLi_3N[/tex]
[tex]34.9gN_2(\frac{1molN_2}{28.02gN_2})(\frac{2molLi_3N}{1molN_2})(\frac{34.83gLi_3N}{1molLi_3N})[/tex]
= [tex]86.8gLi_3N[/tex]
From above calculations, Li gives least amount of the product. So, 21.4 g of [tex]Li_3N[/tex] are formed.
The theoretical yield of Li3N is 21.58 grams when 12.8 grams of Li is heated with 34.9 grams of N2. This is determined by first identifying the limiting reactant through mol calculations and then using the balanced chemical equation to calculate the theoretical yield.
Explanation:To find the theoretical yield of Li3N, we first need to determine which is the limiting reactant. The balanced chemical equation is: 6Li + N2 -> 2Li3N.
From the periodic table, we find that the molar mass of Li is about 6.94 g/mol, and that of N2 is about 28.01 g/mol. Therefore, we have:
12.8 g Li *(1 mol Li / 6.94 g Li) = 1.845 g Li is approximately 1.85 mol Li34.9 g N2 * (1 mol N2 / 28.01 g N2) = 1.25 mol N2According to the balanced chemical equation, 6 moles of Li react with 1 mole of N2 to produce 2 moles of Li3N. Thus, the actual amount of Li can react with 1.85 / 6 = 0.3 mol N2, which is less than the existing amount of N2. Therefore, Li is the limiting reactant.
According to the reaction equation, 6 mol Li reacts to generate 2 mol Li3N, then 1.85 mol Li will generate 1.85 *(2 / 6) = 0.62 mol Li3N. Given that the molar mass of Li3N is about 34.83 g/mol, the theoretical yield is 0.62 * 34.83 = 21.58 g Li3N. Therefore, the theoretical yield of Li3N is 21.58 grams when 12.8 grams of Li is heated with 34.9 grams of N2.
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What is the independent variable in patty experiment
Select the correct answer. A sealed bottle is full of air. The volume of the bottle is decreased, but the temperature remains constant. What other change occurs in the bottle? A. The air pressure will increase. B. The air pressure will decrease. C. The number of air molecules will increase. D. The number of air molecules will decrease.
Answer:
The air pressure will increase
Explanation:
The bottle is sealed, therefor the number of molecules can't change. The air inside the bottle may be considered as an ideal gas, and these have a particular set of laws they must obey.
In this case the law that apllies is Boyle's Law, which states that at a constant temperature, the pressure P of a gas varies inversely with its volume V, or P.V = k, where k is a constant.
If the volume is decreasing, the pressure must increase.
How many moles are there in 24.0 grams of FeF3
Hey there!:
Molar mass FeF3 = 112.84 g/mol
Number of moles = mass of solute / molar mass
Number of moles = 24.0 / 112.84
Number of moles = 0.212 moles of FeF3
Hope that helps!
can you tell me what tosay
Well if the candle lost half of its mass, and they are asking where the other half went. Most likely it is still hardened wax because the it says that you're candle lost half of its mass that means half is gone and the other half is still there. The chemical change would be liquid, and the chemical property would be Wax Vapour that is what i found.
-Hope it helps, if it does not help sorry.
Round off the measurement 0.0070857 m to three significant figures
Compare the type of bonds in metalloids to metal (delocalized) and nonmetal (localized).
1) The type of bond in metalloids to metal is metallic bond.
Metallic bond is a type of chemical bond.
Metallic bond is formed between electrons and positively charged metal ions.
Metallic radius is defined as one-half of the distance between the two adjacent metal ions.
Metallic bond increace electrical and thermal conductivity.
Metals conduct heat, because when free moving electrons gain energy (heat) they vibrate more quickly and can move around.
2) The type of bond in nonmetal is covalent bond.
Nonmetals have low electrical and thermal conductivity.
drug testing if a person do not use drugs how cam he test positive on hair drug test
For example, certain medications may influence the results of the test.
Drug test can show the presence of illicit or prescription drugs on hair samples, although the person has not used these drugs.
Some of false positive drug use is because of this medications: antihistamines, decongestants, antibiotics, antidepressants, analgesics and antipsychotics.
False positives in hair drug tests can occur due to cross-reactivity with medications, passive exposure, external contamination, and handling errors. Confirmatory testing with GC-MS is suggested after a positive result. The reliability of a test also depends on laboratory standards and procedures.
Explanation:False positives in hair drug tests can occur for a variety of reasons. These tests are designed to detect the presence of drugs and their metabolites in the hair. However, sometimes substances that have a similar chemical structure to those being tested for can interfere with the results, leading to a false positive.
Cross-reactivity with other medications, passive exposure to drugs, external contamination, and even errors in the handling or processing of the hair sample can result in an inaccurate test outcome. It's also possible for hair products or treatments to affect the test. If someone receives a positive result but has not used drugs, they should request a confirmatory test, like gas chromatography-mass spectrometry (GC-MS), which can provide a more accurate result.
Furthermore, drug test accuracy can depend on the standards and procedures of the testing lab. Factors such as how the hair is washed and the cutoff levels for a positive result can vary between labs, affecting the test's reliability. It's important to ensure that drug testing is conducted by a reputable and certified laboratory to minimize the likelihood of a false positive.
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5 physical properties of all matter
color
density
volume
mass
boiling point
melting point