To solve kinetic energy problems follow the following steps. There are 5 simple steps.
Potential and kinetic energy are the two fundamental types of energy. The energy that an object holds in relation to another object's position is known as potential energy. You have more potential energy, for instance, if you are at the top of a hill than if you are at the bottom.The energy an object has when in motion is referred to as kinetic energy. Kinetic energy can result from rotation, translation, or vibration (movement from one place to another). The mass and velocity of an object can be used in an equation to quickly calculate its kinetic energy.
To calculate kinetic energy the steps are :-
1. Understand the problem/ kinetic energy
2. Calculate the mass of the object
3. calculate the velocity of the object
4. substitute in the kinetic energy formula
K.E = 0.5 x mv2
5. Simply the equation and find the value.
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what type of chemical bond forms between two atoms bearing opposite charges?
The type of bond formed between two atoms having opposite charges is an ionic bond.
There are mainly two types of bonds formed between two atoms depending upon the way in which the combining atoms attain an octet structure in their valence shell.
First is, Ionic bonds. These are formed by the transfer of one or more valence shell electrons from a metal atom to the valence shell of a non-metal atom both containing opposite charges. Ionic compounds exist as ions also.
Next is Covalent bonds. These bonds are formed by the mutual sharing of electrons between the two combining atoms and they contribute an equal number of electrons for sharing. Covalent compounds only exist as molecules.
Other than these there are other types of bonding as well.
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What is the vapor pressure of a solution made from 23.5 g of glycerin in 130 g of methanol at 50 °c? the vapor pressure of pure methanol at 50 °c is 400 torr. report your answer in torr and round to the first decimal place?
The vapor pressure of the solution can be calculated using the expression of Clausius-Clapeyron equation. Putting the value of 23.5g of glycerin in 130g of methanol in the equation we get the result.
The vapor pressure can be defined as the force that an evaporating substance exerts against the walls of a sealed container.
ln (P1/P2) = (ΔHvap. /R) (1/T2 - 1/T1)
Here where P1 and P2 are the vapor pressures at two temperatures T and T2 . Clausius - Clapeyron equation allows to estimate the vapor pressure at another temperature if the vapor pressure is known at some temperature and if the enthalpy of vaporization is known. The partial vapor pressure of a component in a mixture is equal to the vapor pressure of the component at that temperature multiplied by the component's mole fraction.
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consider the steps involved in preparing a dilute solution from a stock solution. arrange them in order from first to last.dd deionized water until the volume reaches the mark on the flask.Add the desired amount of stock solution. Obtain a flask that is thoroughly cleaned and dried.Cap the flask and invert several times to thoroughly mix the solution
Obtain a flask that is thoroughly cleaned and dried. Cap the flask and invert several times to thoroughly mix the solution are listed below.
What is volume ?
Volume, a three-dimensional quantity, is used to calculate the capacity of a solid shape. In order to calculate how much space a closed figure can occupy in three dimensions, volume is utilized. An example would be the space or shape that a substance, such as a solid, liquid, gas, or plasma, occupies. In addition, the cubic meter deriving from the S.I. is widely employed to quantify volume.
What is deionized water ?
Demineralized water, also known as DI water or DM water, is occasionally used interchangeably with DEI water. Most of the ions are no longer present in the water. Ions are atoms or molecules that are either positive ions (which are called cations) or negative ions (which are called anions) depending on the ratio of electrons to protons (called a cation).
Steps in preparation of dilute solution from a stock solution
1 Obtain a flask that is thoroughly cleaned and dried
2 Add the desired amount of stock solution
3 Add deionized water until the volume reaches the mark on the flask
4 Cap the flask and invert serval times to thoroughly mix the solution
If a student accidentally adds deionized water past the calibration mark on a volumetric flask she should start over and make an entirely new solution. Because it is calibrated for the particular volume if excess deionized water is added it gives wrong values(errors) in titration.
Therefore, Obtain a flask that is thoroughly cleaned and dried. Cap the flask and invert several times to thoroughly mix the solution are listed above.
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which nonmetal is the only one that is liquid at room temperature ?
O mercury
O oxygen
O bromine
O helium
Bromine is the only non metal that exists in liquid state at the room temperature.
Bromine belongs to the member of halogen group. Heavy, volatile, mobile etc are some of the characteristics of it. Bromine is quite dangerous.
It has red brown color at room temperature. It is very reactive as it evaporates quickly to form a similar colored gas.
Bromine molecules depicts strong inter-molecular force so that's why it doesn't evaporates at room temperature. It also shapes up diatomic molecules and Van Der Walls interactions are highly strong.
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Answer:
helium
Explanation:
When hydrogen sulfide gas is bubbled into a solution of sodium hydroxide, the reaction forms sodium sulfide and water.
How many grams of sodium sulfide are formed if 1.80 g of hydrogen sulfide is bubbled into a solution containing 2.40 g of sodium hydroxide, assuming that the sodium sulfide is made in 93.0 % yield?
The amount of sodium sulfide formed would be 2.18 grams..
Stoichiometric problemHydrogen sulfide and sodium hydroxide react according to the following equation:
[tex]2 NaOH (aq) + H_2S (g) -- > 2 H_2O (l) + Na_2S (aq)[/tex]
Mole equivalent of 1.80 g hydrogen sulfide = 1.80/34.1 = 0.05 mol
Mole equivalent of 2.40 g of sodium hydroxide = 2.40/40 = 0.06 mol
From the equation of the reaction, the mole ratio of sodium hydroxide to hydrogen sulfide is 2:1. This means that 0.06 mol sodium hydroxide is limiting while 0.05 mol hydrogen sulfide is in excess.
The mole ratio of sodium hydroxide to sodium sulfide is 2:1. Thus, the equivalent mole of sodium sulfide produced would be:
0.06/2 = 0.03 mol
Mass of 0.03 mol sodium sulfide = 0.03 x 78 = 2.34 grams
At 93.0% yield = 0.93 x 2.34
= 2.18 grams
In other words, the amount of sodium sulfide formed at 93.0% yield would be 2.18 grams.
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Look at the graph of the same data. Between which minutes was the speed of the car fastest? What was its speed in meters per minute then? Between which minutes was the speed of the car slowest? What was its speed in meters per minute then?
if u can pls put an explanation bc my teacher is pretty strict about that
The minutes in which the car was fastest were 1 to 4 and the speed was 733 meters per second , and the minutes in which the car was the slowest were 4 to 5 and the speed was 100 meters per second.
How to identify the speed of the car?The speed can be calculated using a simple formula: distance /time. Moreover, in a graph, you can know whether the car is going fast or slow depending on the slope of the line.
When did the car go the fastest?From minute 1 to minute 4 as the distance covered was 2200, then 2200 / 3 = 733 meters per second.
When did the car go the slowest?From minute 4 to minute 5 as the distance was only 100 meters, then 100/1 = 100 meters per second
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There is 368g of Rb2S, how many moles are there?
To find the number of moles of a substance, you need to divide the mass of the substance by its molar mass.
The molar mass of Rb2S is (2x85.468 + 32.06) g/mol = 212.996 g/mol
So, to find the number of moles of Rb2S in 368g, you would divide 368g by 212.996 g/mol :
moles = 368 g / 212.996 g/mol = 1.73 moles
There are 1.73 moles of Rb2S in 368g.
The thin‑layer chromatography (TLC) plate shown was developed with 20% ethyl acetate in hexanes. (4)Suppose the plate had instead been developed with 5% ethyl acetate in hexanes. Determine whether each plate is a possible result of the adjusted development process
In thin‑layer chromatography (TLC) plate 1: possible
middle: dot on top
dot w/circle on bottom
rest: impossible
Non-volatile mixtures can be separated using the chromatography technique known as thin-layer chromatography (TLC). A sheet of an inert substrate, such as glass, plastic, or aluminum foil, is used for thin-layer chromatography. This substrate is covered with a thin layer of an adsorbent material, often silica gel, aluminum oxide (alumina), or cellulose. In the TLC process, a solvent or combination of solvents serves as the mobile phase. You've come to the correct site if you want to learn more about the thin layer chromatography process. Here, we'll talk about its basic idea, how it works, and how it may be used in many fields of business.A line is often drawn 0.5–1.0 cm from the bottom of a thin layer chromatography plate, which is typically 5-7 cm high. You will place your mixes along that line for separation.
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How many molecules are in 3 moles of H2O?.
There are 18.066 x 10^23 molecules of H2O.
1 mole of a substance is defined as the amount of that substance that contains Avogadro's number of entities, which is 6.022 x 10^23. This number is also known as Avogadro's constant.
It is important to note that Avogadro's constant is specific to the number of entities (atoms, molecules, ions, etc.) and not the mass or volume of a substance.
In the case of H2O (water), each molecule of water is made up of 2 hydrogen atoms and 1 oxygen atom. Therefore, 1 mole of H2O contains 6.022 x 10^23 molecules of H2O, each containing 2 hydrogen atoms and 1 oxygen atom.
So, when we have 3 moles of H2O, we have 3 x 6.022 x 10^23 = 18.066 x 10^23 entities of H2O. As each molecule of H2O contains 2 hydrogen atoms and 1 oxygen atom, this means that we have 18.066 x 10^23 molecules of H2O.
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Is CH3 nonpolar covalent?.
Methane creates a covalent bond that is non-polar. This is due to the fact that there is almost any distinction between the electronegativity of carbon and hydrogen.
Because the electronegativities of the C and H are comparable when we simply consider CH₃, we declare it to be non-polar. As a result, they cancel one another, making CH₃ non-polar.
A methyl anion, the [CH₃-] group, has covalent connections between its carbon and hydrogen atoms. Although a C-H bond has no bond polarity, the anion has molecular polarity because of the negative charge attached to carbon.
Methane creates a covalent bond that is non-polar.
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Chem Reaction: B2H6 + 3O2 --> B2O3 + 3H2O
1. How many grams of liquid oxygen would a rocket have to carry to burn 50g of diborane (B2H6) completely?
According to the stoichiometry of the given chemical equation, 24,295 g of liquid oxygen would a rocket have to carry to burn 14 kilograms (14,000 g) of diborane completely.
What is stoichiometry?The measurement of element or compound amounts in a chemical process is known as stoichiometry. The laws of conservation of mass and merging weights and volumes serve as the foundation for the linked relationships.In quantitative analysis, stoichiometry is used to calculate the concentrations of various substances in the sample.
It helps make solutions with different concentrations that can be used in titrations and balance chemical equations. 48 g oxygen gives 27.66 g diborane thus, for 14000 g diborane 14000×48/27.66= 24,295 g oxygen is required.
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Which event is occurring because of increasing carbon dioxide levels in the atmosphere?.
The atmosphere's rising carbon dioxide concentrations are causing an increase in the greenhouse effect.
The greenhouse effect is a result of the interaction between the sun's energy and the greenhouse gases found in the Earth's atmosphere, such as methane, carbon dioxide, nitrous oxide, and fluorinated gases. The greenhouse effect causes a rise in global temperatures.Gases in the atmosphere, such as carbon dioxide, trap heat in a similar way to a greenhouse's glass roof.During the day, the Sun radiates through the atmosphere. The Earth's surface warms in the sunlight. At night, as the Earth's surface cools, heat is transferred back to the atmosphere. However, a portion of the heat is trapped by greenhouse gases in the atmosphere.To learn more about greenhouse effect from given link
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identify two ways to increase the current in a simple circuit
The two primary methods for increasing current in an electrical circuit are to increase the voltage or to decrease the resistance.
What are the factors affecting current?The flow of electricity in an electronic circuit, as well as the amount of electricity flowing through a circuit, are referred to as electric current. It is expressed in amperes. The greater the value in amperes, the more electricity flows through the circuit.A circuit's current is proportional to the electric potential difference impressed across its ends and inversely proportional to the total resistance provided by the external circuit. The higher the battery voltage(v), the higher the current.The electrical current (I) flowing in a circuit is proportional to the voltage and inversely proportional to the resistance, according to Ohm's law. As a result, increasing the voltage causes an increase in current as long as the resistance(R) of the circuit remains constant.To learn more about current refer to :
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classify the compounds according to whether they are conjugated or non‑conjugated.
Conjugated dienes are two double bonds separated by a single bond. Nonconjugated Dienes are two double bonds are separated by more than one single bond.
In general , p-orbitals were used to identify conjugation. These p-orbitals are significantly used to make double bonds, so a lone pair is present in p-orbitals if it is conjugate . Hence, To be a conjugated atom it must have three or more p-orbitals in a row.
If we talk about Conjugated system, the covalent chemical compound, a group or chain of atoms that carries valence electrons and they are not engaged in single-bond formation so they modify the behavior's of each other atoms present in the vicinity .
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B. Identify the type of molecule from the name of the molecule. (2 point) Name of Molecule Type of Molecule Hexanol Iobutyl acetate Octanal Propanoic acid Benzophenone Dimethyl ether Chlorpheniramine
Answer: Hexanol -> Alcohol, Isobutyl acetate -> Ester, Octanol -> Alcohol, Propanoic acid -> Carboxylic Acid, Benzophenone -> Ketone, Dimethyl ether -> Ether, Chlorpheniramine -> N-Base.
What are functional groups?
A functional group in organic chemistry is a collection of atoms in a molecule that binds together to react predictably. Examples of functional groups include hydroxyl, ketone, amine and ether groups.
Hexanol -> Alcohol Isobutyl acetate -> EsterOctanol -> Alcohol Propanoic acid -> Carboxylic AcidBenzophenone -> KetoneDimethyl ether -> EtherChlorpheniramine -> N-BaseTherefore, the above are the types of the molecules derived from the name of the molecule.
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How do you find the velocity of a ball?.
The velocity of the ball is calculated by the formula v = Δs/Δt.
that is [tex]\overline{v}={\frac{\Delta x}{\Delta t}}[/tex]
Velocity is the direction at which an object is moving and serves as a measure of the rate at which its position is changing as seen from a specific point of view and as measured by a specific unit of time (for example, 60 km/h northbound). In kinematics, the area of classical mechanics that deals with the motion of bodies, velocity is a fundamental idea.
A physical vector quantity called velocity must have both a magnitude and a direction in order to be defined. Speed is the scalar absolute value (magnitude) of velocity; it is a coherent derived unit whose quantity is measured in metres per second (m/s or m/s1) in the SI (metric system). In contrast to "5 metres per second east," which is a vector, "5 metres per second," for instance, is a scalar.
By dividing the distance by the time, the ball's speed is determined. The average speed will be 60/3, or 20 feet per second (6.1 metres per second), if the time was 3 seconds.
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Mno2(s) + 4hcl(aq) → mncl2(aq) + cl2(g) + h2o how many grams of hcl are required to produce 11.2g cl2 ?
28.0 grams of HCl are required to produce 459.5 g grams of Cl2.
To find out how many grams of HCl are required to produce 11.2 grams of Cl2, we need to use the balanced equation for the reaction between MNO2, HCl, MnCl2, and Cl2.
MNO2(s) + 4HCl(aq) → MnCl2(aq) + Cl2(g) + H2O
From the balanced equation, we can see that 1 mole of MNO2 reacts with 4 moles of HCl to produce 1 mole of Cl2.
To convert the mass of Cl2 to moles, we use the molar mass of Cl2, which is 35.5 g/mol:
11.2 g Cl2 / 35.5 g/mol = 0.316 mol Cl2
Since the reaction requires 4 moles of HCl for every 1 mole of Cl2, we can use the ratio between moles of HCl and moles of Cl2 to find the number of moles of HCl:
4 moles HCl / 1 mole Cl2 = 4 moles HCl/ 0.316 moles Cl2 = 12.6 moles HCl
To convert moles to grams, we use the molar mass of HCl, which is 36.46 g/mol:
12.6 moles HCl x 36.46 g/mol = 459.5 g HCl
Therefore, 28.0 grams of HCl are required to produce 11.2 grams of Cl2.
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if 2Na + Cl2 --> 2NaCL ... what happened to the two on Cl? and if 2H2O --> 2H2 + O2 what happened to the 2 on the O as well? could you please answer this in like sort of a simple way? my brain is mush at the moment lol.
Explanation:
when a big number is behind a compound, it means there is 2 of it.
for example 2Na would mean there is a sodium atom and another sodium atom not joined together, but they're just near.
when there is a 2 (which should be small and at the bottom) after an atom, it means there are 2 of that atom.
i hope this helps
in complementary base pairing bonds with and bonds with
The two strands of DNA are held together by hydrogen bonds.
What is chemical bond?A chemical bond is an attraction between two atoms or ions that allows the formation of chemical substances. Chemical bonds are formed when the atoms share or transfer electrons in order to obtain a full outer shell of electrons, achieving a more stable electron configuration. This can happen through covalent bonds, ionic bonds, hydrogen bonds, and other types of bonds. Chemical bonds are responsible for the stability of molecules and are responsible for many of the physical and chemical properties of substances.
These hydrogen bonds form between the nitrogenous bases of the two strands of DNA. Adenine (A) on one strand always bonds with thymine (T) on the other, and cytosine (C) always bonds with guanine (G). This highly specific arrangement of base pairs is essential for the replication and transcription of genetic information.
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If you have a ound wave moving at 340 m/ and a frequency of 100 what i the wavelength
If you have sound wave moving at 340 m/s and a frequency of 100 Hz , the wavelength is 3.4 m.
Given that :
The velocity of the sound wave = 340 m/s
The frequency = 100 Hz
The wavelength expression is given as :
Wavelength = velocity / frequency
where,
velocity = 340 m/s
frequency = 100 Hz
Wavelength = 340 / 100
Wavelength = 3.4 m
Thus, the wavelength is 3.4 m if the sound wave velocity is 340 m/s and the velocity is 100 Hz. The wavelength is the distance between crests in the adjacent cycles of the waveform.
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what happens to the co2 that is produced in the reaction?
Carbon dioxide reacts with water in a reversible reaction to form carbonic acid (H2CO3).
What is meant by Carbon dioxide ?
Carbon dioxide is used as a refrigerant, in fire extinguishers, to blow coal, foam rubber and plastics, inflate life rafts and life jackets, blast coal, promote plant growth in greenhouses, immobilize animals before slaughter, and in carbonated drinks.When animals breathe or decay (decompose), carbonate rocks are worn, forest fires happen, and volcanoes erupt, carbon dioxide is naturally released into the atmosphere.Human activities such as the combustion of fossil fuels, the destruction of forests, and the manufacture of cement all contribute to the atmospheric addition of carbon dioxide.Two oxygen atoms and one carbon atom make up the chemical structure of the gas known as carbon dioxide (CO2).Its capacity to absorb infrared waves makes it a significant greenhouse gas.To learn more Carbon dioxide about refer to
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Please help me!!!!!!!
You can apply the straightforward formula to determine the average atomic mass.
How can I determine the average atomic mass of isotopes?You can apply the straightforward formula to determine the average atomic mass.AM = f1 m1 + f2 m2 +... + fn mn.AM stands for average atomic mass, fn for natural abundance of isotope number n, and mn for isotope number n's atomic mass.Add the atomic masses of each isotope to the natural abundance.Add up all the items you got in step one.The resulting value is the element's average atomic mass.The existence of isotopes for elements can be explained by their average atomic mass. It provides us with the average atomic masses of all the element's isotopes.It is advantageous since its value is equal to the molar mass of an element. Additionally, being aware of the tooth.To learn more about average atomic mass refer to:
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Write a bond-line formula for each of the following compounds:
(a) 1,4-Dichloropentane
(b) sec-Butyl bromide
(c) 4-Isopropylheptane (k) 1,4-Dicyclopropylhexane
(d) 2,2,3- Trimethylpentane (I) Neopentyl alcohol
(e) 3-Ethyl-2 methylhexane
(f) Dichlorocyclopentane
(g) cis-1,2 Dimethylcyclopropane
(h) trans-1,2 Dimethylcyclopropane
(i) 4-Methyl-2-pentanol G) trans-4 Isobutyleyclohexanol (m) Bicyclo[2. 2. 2Joctane (n) Bicycl0butane (o) Cyclopentylcyclopentane (p) 7-Methyl bicyclo[2. 2. 1]heptane
Bond line shows a molecular formula with a single line for each of the covalent links.
Define Bond line
Organic chemists have a convention for displaying molecular structures called bond line notation. This represents a bond between two atoms as a line. The ends of the line represent the positions of the bonded atoms. Only atoms other than carbon and hydrogen are particularly shown.
Pentane is the alkane's parent name for 1,4-dichloropentane. The prefix di- indicates that there are two substituents, and the numbers 1 and 4 indicate that they are on the corresponding carbons. Butane serves as the parent chain for sec-butyl bromide. Heptane serves as the parent chain for 4-isopropylheptane. Pentane serves as the parent chain for 2,2,3-trimethylpentane. Hexane serves as the parent chain for 3-Ethyl-2-methylhexane. Cyclopentane serves as the parent chain for dichlorocyclopentane.
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explain the process that creates chemical elements lighter than iron, including evidence
Nuclear fusion is the process that creates chemical elements lighter than iron. Helium is created when two hydrogen atoms join in a star at a speed that is almost as fast as light.
What is element?A material is considered an element if it cannot be divided into two or maybe more simpler compounds by any kind of chemical process, including the use of light or heat. For instance, when a piece of gold is melted, the gold element still melts and is there.
The lightest element is hydrogen. Helium is created when two hydrogen atoms join in a star at a speed that is almost as fast as light. The star keeps doing this until there are no more hydrogen atoms available. When this occurs, the star produces Beryllium by fusing the Helium atoms. When the helium runs out Carbon is created by combining Beryllium in the star. This procedure keeps going until the star produces iron. The star then explodes. Our dwellings and buildings are made out of all those atoms.
Therefore, nuclear fusion is the process that creates chemical elements lighter than iron.
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light amplification by stimulated emission of radiation
Light Amplification by Stimulated Emission of Radiation, or "LASER," is the abbreviation for this process. It applies to any apparatus that produces and amplifies a coherent, focused, narrow beam of light.
Amplification of light - what does that mean?Increasing the amplitude of an electromagnetic light wave is the process of light amplification. Three main categories—laser, parametric, and scattering—are commonly used to describe this process.Light Amplification by Stimulated Emission of Radiation, or "LASER," is the abbreviation for this process. It applies to any apparatus that produces and amplifi es a coherent, focused, narrow beam of light.The energy from an electrical current or light is absorbed by the electrons in the atoms of optical materials like glass, crystal, or gas, which results in the formation of a laser. The additional energy "excites" the electrons to the point that they change their orbits around the atom's nucleus from one with a lower energy to one with a higher energy.To learn more about Light Amplification refer to:
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Which manufacturing process is shown in the photograph?
A. Combining
B. Forming
C. Separating
D. Conditioning
Answer:
looks like separating
Explanation:
cutting the fabric with scissors
fill in the words to complete each step in liquid spill cleanup.
1. Surround the area with absorbent material, then cover the spill.
2. Scoop up the material and place in a plastic bag.
3. Place the bagged waste in a solid waste container.
4. Wipe down the area with detergent and water
Each blank is filled with the correct word from the given options as follows: 1: Surround the area with B: absorbent material, then cover the spill; 2: Scoop up the material and place in a A: plastic bag; 3: Place the bagged waste in a D: solid waste container; and 4: Wipe down the area with C: detergent and water.
A spill in the workplace can yield a variety of hazards and risks to workers so, in essence, it is essential that they understand how to clean up liquid spills that otherwise can be hazardous. So, such materials are needed to be appropriate disposed of. Following steps can be followed to clean up liquid spills properly:
1: Surrounding the area with absorbent material, then covering the spill;
2: Scooping up the material and placing in a plastic bag;
3: Putting the bagged waste in a solid waste container;
4: Wiping down the area with detergent and water
"
Complete question is as follows:
Fill in the words to complete each step in liquid spill cleanup.
options:
A: plastic bag...
B: absorbent material...
C: detergent and water...
D: solid waste container...
1. Surround the area with _________, then cover the spill.
2. Scoop up the material and place in a ________
3. Place the bagged waste in a _________
4. Wipe down the area with _________
"
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what is the similarities of comets and asteroids
Find the empirical formula for a compound with a molecular formula of C8H12.
Answer:
C2H3
Explanation:
The empirical formula is the simplest whole number ratio of atoms of each element in a compound while the molecular formula shows us the actual number of atoms of each element
Writing C8H12 in a ratio:
8 : 12
This can be simplified by dividing by a common factor present in both numbers
8 and 12 can be divided by 4
8 ÷ 4 = 2 and 12 ÷ 4 = 3, hence the ratio is:
2 : 3
This cannot be simplified any further
Thus, the empirical formula is C2H3
How many molecules are in 1. 5 moles?.
There are 9.033 x10²³ molecules in 1. 5 mol
By multiplying the sum of moles by the Avogadro constant, one can get the total number of atoms or molecules in a sample. The equation reads as follows:
number of molecule= moles x avogadro's number
One mole of material has 6.022x10² atoms, and equal quantities of different gases measured at the same pressure and temperature have the same number of molecules in them.
number of molecule= moles x avogadro's number
number of molecule= 1. 5 mol x 6.022x10²³
number of molecule= 9.033 x10²³
Therefore, there are 9.033 x10²³ molecules in 1. 5 mol of H₂O
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