match the volume to the correct graduated cylinder

• 21.3 ml
• 44.5 ml
• 6.6 ml
• 24.0 ml
• 75.0 ml
• 29.5 ml
• 38.0 ml
• 2.65 ml

Answer:

133.333333333 cm^3

Explanation:

Volume = Mass/Density

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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If one walks at a speed of 3 meters per second, the distance that will be walked in 11 seconds is 33 metres.

Speed is the rate of motion or action, specifically the magnitude of the velocity i.e. it is the rate distance is traversed in a given time.

The speed can be measured by dividing the distance moved by the time taken as follows:

Speed = distance/time

3m/s = d/11

distance = 33metres

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Soil and water conservation are those activities at the local level which maintain or enhance the productive capacity of the land including soil, water and vegetation in areas prone to degradation. prevention or reduction of soil erosion, compaction, salinity; conservation or drainage of water and.

What do you mean by conservation of water?

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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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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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Answer:

Beryllium as 4 protons and 5 neutrons in its nucleus giving it an Atomic Number of 4 and an atomic mass of 9. An atom of Beryllium has only 2 electrons in its outer shell.

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

The two primary methods for increasing current in an electrical circuit are to increase the voltage or to decrease the resistance.

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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.

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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There are a total of 6 atoms in 2 H2O molecules. Each H2O molecule is made up of 2 hydrogen atoms and 1 oxygen atom, which means that 2 H2O molecules contain a total of 4 hydrogen atoms and 2 oxygen atoms. This can be calculated by multiplying the number of atoms in each molecule (2 hydrogen atoms and 1 oxygen atom) by the number of molecules (2). Therefore, 2 H2O molecules contain 2 x 2 = 4 hydrogen atoms and 2 x 1 = 2 oxygen atoms, for a total of 4 + 2 = 6 atoms.

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A noteworthy skill of human chemists is the capacity to predict reactions' outcomes with considerable accuracy.

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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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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.

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You can apply the straightforward formula to determine the average atomic mass.

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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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The equation related to reaction between Sulfur dioxide and oxygen to produce sulfur trioxide is 2SO[tex]_2[/tex](g) + O[tex]_2[/tex](g) [tex]\rightarrow[/tex] 2SO[tex]_3[/tex] (g).  SO[tex]_2[/tex]  is limiting reagent.

The reactant that controls how much of the products are generated inside a chemical reaction is known as the limiting reagent. Since some of the other reactants remain that after limiting reagent has been used fully, it is occasionally discovered that they are in excess in the reactions. The theoretical yield is the most product that can theoretically be produced.

2SO[tex]_2[/tex](g) + O[tex]_2[/tex](g) [tex]\rightarrow[/tex] 2SO[tex]_3[/tex] (g)

moles of SO[tex]_2[/tex] =20.0 g / 64.07

                      =0.312moles

moles of O[tex]_2[/tex]= 15.6 g/32

                   =0.487moles

On dividing the moles by stoichiometry, out of  O[tex]_2[/tex] and SO[tex]_2[/tex], SO[tex]_2[/tex]  is limiting reagent.

Therefore,  the equation related to reaction between Sulfur dioxide and oxygen to produce sulfur trioxide is 2SO[tex]_2[/tex](g) + O[tex]_2[/tex](g) [tex]\rightarrow[/tex] 2SO[tex]_3[/tex] (g).  SO[tex]_2[/tex]  is limiting reagent.

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Answer:

3.17648

Explanation:

K = 19

N = 7

O3 = 48

19 + 7 + 48 = 74

74 = Mr of KNO3

moles = mass / Mr

moles = 235.06 / 74

moles = 3.17648

The two strands of DNA are held together by hydrogen bonds.

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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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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We must determine standard enthalpy change using standard heat of formation. We are aware of the standard heat of graphite creation in order to answer that query.

One group of chemical elements can convert chemically into another through the process of reaction. Sol- We must follow their request and use the accepted temps of formation in this problem. In order to calculate a standard enthalpy change, we must use a standard heat of formation. As a result, in this scenario, we must establish the typical enthalpy change for the particular reaction. What is the advised reply to it, then? In this situation, we must determine the standard or enthalpy change. The result of mixing oxygen gas and solid graphite is c. As a result, gas is created. This is the answer to that reply. The usual heat of creation must be determined. This holds true.

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The relationship between structures X and Y is X, nuclei, are located inside Y, chromosomes, and these structures provide energy for the cell.

The complete question is,

Which of the following best explains the relationship between structures X and Y?

X, chromosomes, are located inside Y, the nucleus, and these structures store genetic material for the cell.

X, ribosomes, are located inside Y, the nucleus, and these structures provide protection for the cell.

X, nuclei, are located inside Y, chromosomes, and these structures provide energy for the cell.

X, chromosomes, are located inside Y, DNA, and these structures store proteins for the cell.

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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

An electrolytic cell is a type of electrochemical cell that uses an externally applied voltage to drive a chemical reaction.

In an electrolytic cell, the applied voltage causes a reaction to occur, such as the oxidation or reduction of ions in the electrolyte or the decomposition of the material.

The voltage applied across the cell is known as the electrolytic voltage and is typically much higher than the cell's thermodynamic equilibrium voltage.

The electrolytic voltage is used to drive the reaction, and is typically provided by a battery, fuel cell, or other external power source.

The reaction that occurs during an electrolytic cell is characterized by its voltage, current, and power output.

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Answer:

looks like separating

Explanation:

cutting the fabric with scissors

The molar solution 2.0 obtained when 0.5 mole solute is dissolved in:

250 ml solution (Option C)

Moles of solute in moles divided by volume of solution in liters is molarity.

M = n/V

Where:

M denotes molarity

n denotes moles of solute, and

V denotes volume.

You can solve for the number of moles by multiplying the equation by volume, or MV = n.

So, to find the number of moles of solute, multiply the molarity by the volume. The molar mass of the solute can then be used to convert moles of solute into grams of solute, or mass.

Molarity = moles of solute / volume of solution

2 = 0.5 / volume of solution

So, the volume of solution = 0.25 L

= 250 ml

The question is incomplete, it should be:

2.0 molar solution is obtained when 0.5 mole solute is dissolved in:

A. 250 ml solvent

B. 250 gr solvent

C. 250 ml solution

D. 1000 ml solvent

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The amount of sodium sulfide formed would be 2.18 grams..

Hydrogen 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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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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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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