How Much Mass Does 2.1 X 1023 Molecules Of H2O2 Have? (2024)

Chemistry High School

Answers

Answer 1

The mass of 2.1 × 10²³ molecules of H₂O₂ have 11.86 g.

given that :

mass of the molecules : 2.1 × 10²³ molecules

mass of the H₂O₂ = (number of molecules / Avogadro's number) × molar

mass

molar mass of H₂O₂ = 34.015 g/mol

Avogadro's number = 6.022 × 10²³

mass of the H₂O₂ = (number of molecules / Avogadro's number) × molar

mass

= ( 2.1 × 10²³ / 6.022 × 10²³ ) × 34.015

= 11.86 g

so the mass of H₂O₂ is 11.86 g.

Thus, The mass of 2.1 × 10²³ molecules of H₂O₂ have 11.86 g.

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Related Questions

block
wood with blac
4. Find the density of a piece of wood with a mass of 50.0 grams and a volume of 100. cm³.
=2g/cm3
Will it float on water?

Answers

The density of the wood will be 0.5g/cm³ . It will float in water because its density is than that of water i.e, 1g/cm³ .

Given that the mass of the substance is 50 g and its volume is 100cm³

So, its density will be given as,

Density= Mass/ Volume

=50/ 100 g/cm³

= 0.5 g/cm³

When placed in water, an object with a density greater than or less than that of water will float or sink, respectively. A substance's density is a defining characteristic that is independent of substance's volume.

The substance's density is less than that of water. Due to lower density than water, the substance will float on the surface of water.

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if a food dye has an absorbance value of 1.00 at 598 nm when a 1.074x10-5 m sample was measured in a 1 cm cuvette, what can the dye's molar absorptivity, in m-1cm-1, be estimated as?

Answers

Each solution contains a different dye concentration in moles. Utilize your measured absorbance values and the Beer-Lambert Law equation (A = bc).

A 1 molar solution is what?

In order to create a 1 molar (M) solution, 1.0 GMW of the chemical must be dissolved in 1 liter of water. 58.44 g make up a 1M solution of NaCl. Example: Enzyme histochemistry routinely employs HCl.

What does molar unit mean?

The most common unit for molarity in chemistry is the number of moles per liter, given by the unit sign mol/L or moldm3 in SI units. One molar, or 1 M, of a solution's content is defined as one mol/L.

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select the options that correctly identify the concentrations of the individual ions present in a solution that is 0.14 m in zncl2. multiple select question. [zn2 ]

Answers

The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. The Concentration of Cl⁻ and Zn²⁺ is 0.28M and 0.14M respectively.

What is molarity?

Molarity can be calculated by dividing number of moles of solute by volume of solution in liter. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.

Molarity of ZnCl[tex]_2[/tex]=0.14 M

ZnCl[tex]_2[/tex] dissociates as

ZnCl[tex]_2[/tex][tex]\rightarrow[/tex] Zn²⁺+ 2Cl⁻

Concentration of Zn²⁺=0.14 M

Concentration of Cl⁻= 2×0.14 M=0.28M

Therefore, concentration of Cl⁻ and Zn²⁺ is 0.28M and 0.14M respectively.

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The density of WATER is 1gmL. Is the unlabeled clear liquid WATER? Why or why not? Pls explain

Answers

Yes, the unlabeled clear liquid water has a density of 1 gram/liter.

What is density?

Density refers to the mass of an object in unit volume of a substance. The formula for density can be represented as density = Mass / Volume. Density is expressed in grams / cubic centimeter. A common unit of measurement for water's density is gram per milliliter i.e. 1 g/ml or 1 gram per cubic centimeter i.e. 1 g/cm3.

So the exact density of water is not 1 g/ml, but rather less at 0.99 g/ml at 4° Celsius which is about 39.2° Fahrenheit. Water is an inorganic, transparent, odorless, and colorless chemical substance that is the main constituent of the hydrosphere of the earth and the fluids of all living organisms. It is important for all forms of life despite providing no food, energy, or organic micro-nutrients.

So we can conclude that the unlabeled clear liquid water has 1 gram/liter of density.

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Select one or more correct answers.
Hakeem is testing the effects of sunlight on samples of soil. Which of these actions would introduce confounding variables into Hakeem’s experiment?

A. He tests a theory that’s already been established.
B. He tests multiple hypotheses at a time.
C. He uses identical specimens when completing multiple trials.
D. He adjusts the independent variable and records the effects.
E. He uses different types of soil in each of his samples.

Answers

He tests multiple hypotheses at a time and He uses identical specimens when completing multiple trials.

The two options are correct B,C.

Which four sorts of experiments are there?

While experimentation as a whole encompasses this form of research, individual research designs have certain characteristics. The four main design types that are pertinent to user experience design are appropriate in this study, scientific, and developed a semi.

A true experiment is what?

Any randomized experiment may occasionally be referred to as a real experiment. In other cases, the phrase "true experiment" is used to refer to any investigations that have at at one continuous dependent variable and at least one free variables that is experimentally changed. When experiments are also used to determine whether a theory-based idea, axiom, or phenomenon is true, they play a crucial role in the evolution of science.

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what conclusion can be drawn based on experimental results? what conclusion can be drawn regarding the ratae of reaction of the alkyl bromide vs alkyl chloride

Answers

Bromine is more reactive than chlorine.

The rate of the SN1 reaction, which is more reactive with bromine, depends only on the concentration of the alkyl halide. The higher is the concentration of substance, the faster is the reaction rate of that substance. The nature of the alkyl halide also affects the reaction . The secondary and primary alkyl halides reacts slower than tertiary alkyl halide.

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Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.) 2 silver dishes. photo by mgeurts ag(s) h2s(g) → ag2s(s) h2(g)

Answers

To make the silver shiny again, we can do silver tarnishes. The balanced tarnishing reaction is 2Ag(s) + H2S(g) --> Ag2S(s) + H2(g). Hence, the correct coefficients for the reaction above are: 2, 1, 1, 1.

How to write a balanced chemical equation?

A balanced reaction is when the coefficient of all atoms in the reactants (the left side) is the same as the products (the right side). Given this equation:

Ag(s) + H2S(g) --> Ag2S(s) + H2(g)

The balanced reaction is:

2Ag(s) + H2S(g) --> Ag2S(s) + H2(g)

Hence, the coefficients of the reaction above are: 2, 1, 1, and 1.

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Why is taq dna polymerase used in pcr reactions rather than a normal dna polymerase?.

Answers

Taq polymerase can withstand the high temperatures involved in PCR reactions.

How does DNA replication use polymerase?

A DNA polymerase belongs to a group of enzymes that catalyzing the synthesis of Target dna from nucleoside triphosphates, which are the basic building blocks of DNA. These enzymes, which are necessary for DNA replication, typically function in groups to split a single dna Template duplex into two identical DNA duplexes.

In plain English, what is polymerase?

Definition. All living things have DNA polymerase, a particular sort of enzyme. DNA replication and DNA repair and maintenance are its two main goals. The enzyme is essential for passing on genetic information from one generation to the next.

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Determine the total number of atoms for each chemical formula!!

Answers

Answer:

9 for the first one

19 for the second

20 for the third

13 for the fourth

9 for the fifth

I NEED HELP WITH THIS WHOLE PAGE

Answers

1) The endocrine glands pictured above are:

Thyroid Gland and Parathyroid glandAdrenal GrandOvariesPancreatic GrandPitutuary GlandPineal Gland.

2) Organs of the endocrine system are often called glands. An organ is responsible for the production of one or more substances such as hormones, digestive juices, perspiration, tears, saliva, or milk.

The compounds are released directly into the circulation by the endocrine glands. The compounds are released by exocrine glands into a duct or aperture to the interior or outside of the body.

3) Pituitary Gland produces the following hormones:

Adrenocorticotropic hormone Follicle-stimulating hormoneGrowth hormone (GH)Luteinizing hormone (LH) etc.

What is the importance of the Endocrine system?

The endocrine system regulates juvenile growth and development, adult body processes, and the reproductive process. All of the body's key activities and processes are controlled and regulated by the endocrine system: Energy management. Reproduction.

The pituitary gland, for example, is located at the base of the brain and is no larger than a pea. Despite its tiny size, the pituitary gland is sometimes referred to as the "master gland." Many other endocrine glands are controlled by the hormones it produces.

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Describe the temperature, moisture and air pressure associated with a Maritime Tropical air mass.

Answers

Answer:

it is damp moist and other things

Explanation:

ethylene glycol, the substance used in automobile antifreeze, is composed of 38.7% c, 9.7% h, and 51.6% o by mass. its molar mass is 62.1 g/mol. determine both the empirical and molecular formula of ethylene glycol.

Answers

Like all automotive antifreeze compounds, they are 38.7% carbon. So carbon is 38.7 9.7% hydrogen, 9.7 hydrogen and 51.6% oxygen. all right. Ah 1500 6% oxygen. yes. all right. Next, we need to empirically find molecular phone lines emitted from the ground.

Well, first of all, yes there are more. We have the atomic weight of carbon. 1201 Oxygen 16. The process divides each percentage by the fractional mass by 50%. So divided by 3 good points to find 38.7. This is 9.7 divided by 1, which is 9.7, and 51.6 divided by 16, which is 5157 divided by 16. I want to believe all right. The next step is to share each. youngest age. The minimum he is 3.225. If you're sharing now, we're sharing 3.225 times 3.225 is one 9.7 x 3.225. Approximately 3 and 3.225 divided by 3.225. So we have an empirical formula where carbon is 1, hydrogen is 3, and oxygen is 1. See below for 3. A small amount of Italian black hole was given. First find the molecular formula. The empirical mass is 2, 3, 16, which is 12 plus 1. So 15 plus 7 30 from g Berman. This is the molecular formula of the molecule. Therefore, we can find the sector of the mass of the molecular formula divided by the mass of the empirical formula. Remember that we are using this subdivision. Thus, for molecular and larger LAMAs.

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A scuba diver's tank contains 1.47 moles of O₂ and 5.53 moles of He at the end of a dive. If the pressure of the gas mixture is 12.1 atm, what is the partial pressure of
He in the tank?
O A 2.19 atm
B
2.54 atm
Oc9.56 atm
OD 15.3 atm

Answers

A scuba diver's tank contains 1.47 moles of O₂ and 5.53 moles of He at the end of a dive. If the pressure of the gas mixture is 12.1 atm, the partial pressure of He in the tank is 9.56 atm.

given that :

moles of O₂ = 1.47 mol

moles of He = 5.53 mol

Total mole = 1.47 + 5.53 = 7 mol

mole fraction of He = mole of He / total moles

= 5.53 / 7

= 0.79 mol

Total pressure of gas mixture = 12.1 atm

partial pressure of He = mole fraction of He × total pressure

= 0.79 × 12.1

= 9.56 atm

Thus, A scuba diver's tank contains 1.47 moles of O₂ and 5.53 moles of He at the end of a dive. If the pressure of the gas mixture is 12.1 atm, the partial pressure of He in the tank is 9.56 atm.

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account for the regioselectivity and stereoselectivity observed when this compound is treated with in by drawing the product formed prior to a subsequent hydride reduction reaction. use wedge and hash bonds only when needed to show reaction stereochemistry. if the reaction produces a racemic mixture, just draw one stereoisomer. in your answer, draw the expanded structure for the acetyl group (ac).

Answers

Regioselectivity is the preference of chemical bonding or breaking in one direction over all other possible, stereospecific mechanism specifies the stereochemical outcome of a given reactant.

Regioselectivity occurs when two possible reaction products are regioisomers. Stereoselectivity exists when two possible reaction products are stereoisomers. Chemoselectivity occurs when a reactant within a substrate prefers one functional group over another. Markovnikov's law predicts the regiochemistry of his HX addition to unsymmetrically substituted alkenes.

The Zaitsev and Hoffman rule describes the principle of regioselectivity in elimination reactions. Regioselective means that the reaction selectively produces one regioisomer as the major product. The two alkenes are positional isomers because the double bonds are in different regions. A process that favors bond formation at certain atoms over other possible atoms.

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what type of bonding is responsible for maintaining the shape of the trna molecule? a. hydrogen bonding between base pairs b. van der waals interactions between hydrogen atoms c. peptide bonding between amino acids d. covalent bonding between sulfur atoms e. ionic bonding between phosphates

Answers

Ionic bonding between phosphates is responsible for maintaining the shape of the trna molecule. Hence the correct option is e.

What is trna molecule?

Transfer RNA (tRNA) is a small RNA molecule that is essential for protein synthesis. Transfer RNA connects the messenger RNA (mRNA) molecule to the growing chain of amino acids that makes up a protein.

When an amino acid is added to the chain, a specific tRNA pairs with its complementary sequence on the mRNA molecule, ensuring that the correct amino acid is inserted into the protein being synthesised.

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what are the major products obtained upon treatment of methyl phenyl ether with excess hbr? multiple choice phenol and bromomethane correct phenol and methanol bromobenzene and bromomethane bromobenzene and methanol

Answers

Phenol and bromomethane are the major products obtained upon treatment of methyl phenyl ether with excess HBr.

What do you mean by Phenol and Bromomethane?

Phenols are a class of chemical compounds which consist of a hydroxyl group (—OH) bonded directly to an aromatic hydrocarbon group. The simplest of the class is phenol, C6H5OH. Friedlieb Ferdinand Runge discovered Phenol in the year 1834. It was extracted from coal tar.

Bromomethane, commonly known as methyl bromide, is an organobromine compound with formula CH3Br. It is a colorless, odorless, nonflammable gas which is produced both industrially and biologically. It consist of a a tetrahedral shape and is recognized as a ozone-depleting chemical.

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Which of the following notations is the correct noble gas configuration for Li?
O A. 1s²2s¹
OB. 1s22s
C. [He]2s¹
D. [Hel1 s22s¹

Answers

The right option is C, the correct noble gas notations for Li is [He] 2s¹.

We know that the atomic number of Li is 3 , so it will have 3 electrons in total, in filling electrons the electronic configuration is came as follows:

1s²2s¹ , but we asked for noble gas electronic configuration , so in this type of way of writing a noble gas configuration , we write by using the most nearer electronic configuration of a noble gas.

Let us see each option in each case,

In option A, it is the normal electronic configuration with no noble gas involved so it will be wrong.In option B, it is 1s²2s , which is 2 electrons only, so it will be wrongIn option C, it is using 2s² for He and the rest one electron for Li is written as 2s¹, so it will be the right answer.In option D, if we look at total number of electrons it will be 5 electrons , so this one will also be wrong.

So the correct notation will be [He]2s¹ which is option C.

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7. The horizontal rows of the periodic
table are called
a. periods.
b. columns.
d.
c. groups.
families loups

Answers

Answer:

periods

Explanation:

Draw the structure of the major organic product formed in the reaction of 1−methylcyclohexene with bromine in water.

Answers

The major organic product formed in the reaction of 1−methylcyclohexene with bromine in water is attached as a picture.

A reaction mechanism is a representation of step by step transfer of electrons and molecules from one compound to another compound. In reaction mechanisms, the curved arrows show the moment of electrons.

In the reaction mechanism of 1-methyl cyclohexene the double bond of 1-methyl cyclohexene act as an attacking group and attacks Br2. As a result, one Br atom gets attached to 1-methyl cyclohexene. This results in a carbocation generation on the carbon having the methyl group. This carbon cation then attacks the oxygen of water molecules and the organic product (1S,2S)-2-bromo-1-methylcyclohexan-1-ol will generates as the major product.

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HELP FAST!!!!!!!!!!!!! Acetic acid systematically named ethanoic acid is an acidic, colorless liquid and organic compound with the chemical formula C2H4O2.
After adding 5-8% of acetic acid in water it becomes vinegar and is mostly used as preservatives in pickles.
The adjacent figure shows Lewis structure for acetic acid.
Indicate the number of sigma and pi bonds in the adjacent figure. State the meaning of sigma and pi bonds.

Answers

In acetic acid molecule, there are seven sigma bonds and one pi bond.

What are sigma and pi bonds?

We know that the chemical bonds that are found in a substances are responsible for the joining of the atoms of the substance together. This implies that a bond is said to be formed any time that two atoms have been joined together in a molecule.

In this case, we have a molecule of acetic acid. There are several bonds that are formed as the atoms that form the acetic acid are being joined together. These bonds fall into two categories, the sigma bonds and the pi bonds.

The sigma bond are the bonds that are single bonds while the pi bonds are the bonds that are multiple bonds, we can know the sigma and the pi bonds by a close examination of the molecule as shown.

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A solution was found to have a 15. 6 % transmittance at 500 nm, its wavelength of maximum absorption, using a cell with a path length of 5. 00 cm. Calculate the absorbance of the solution in a 1. 00 cm cell at 500 nm.

Answers

Absorbance of the solution in a 1. 00 cm cell at 500 nm is 0.161

Absorption measure the amount of light of a particular wavelength that a particular substances block from passing and the two main factor that affect absorption are substances concentration and optical path length and the net absorption rate is calculated using the formula of the total vacant area at the beginning of the period plus square feet

Here given data is

Percentage transmittance of the sample = 15.6 %

Therefore absorbance 2 - log (%T) = 2 - log(15.6) = 0.8069

Then use beer's law :

A = ε×c×l

Where ε = molar absorptivity of the solution

c = concentration of the solution

l = path length of the solution

Then A = 0.8069 and l = 5.00 cm

0.8069 = ε×c×(5.00cm)

ε×c = 0.16138cm⁻¹

For the next part then assume that ε×c remain constant and we have

A' = ε×c×l where l = 1.00cm

Then put the values

A' = (0.16138cm⁻¹)×(1.00cm) = 0.16138

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why does the alkane not change color? choose all that apply. it is non reactive to bromine. it is reactive to bromine. there is no electron density for it to serve as an electrophile. there is no electron density for it to serve as a nucleophile.

Answers

Alkane hydrocarbons will not cause dissolution of bromine because alkanes do not have double bonds so they will not undergo addition reactions. Since alkanes do not have double bonds the red color of bromine does not change. The reaction that may occur in alkanes with bromine is a substitution reaction.

Addition Reaction

Addition reactions are reactions that break a double bond. It can be used to distinguish alkenes from alkynes. This recognition reaction is carried out by adding bromine which is red brown. The addition reaction was indicated by the disappearance of the red-brown color from the bromine. The addition reaction was indicated by the disappearance of the red-brown color from the bromine.

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If 2.15 moles of C₂H4 (ethane) reacts with 6.30 moles of O2, which is the
limiting reagent?

Answers

Answer:

Oxygen is the limiting reagent.

Explanation:

First you must make a chemical equation. Then you will do a mole bridge from the moles of each given substance to a product, you can find how much product each will create. The reactant that creates the least is the limiting reagent. I hope this helps!

the lowest-energy distribution of electrons in the sublevels for an atom of a particular element is called the

Answers

The lowest-energy distribution of electrons in the sublevels for an atom of a particular element is called the ground state.

When an atom, molecule, or ion and its electrons are at their lowest potential energy level, they are said to be in the ground state. They are said to be thrilled if their energy level is higher. Excited electrons are those with energies greater than their ground state. When many quantum mechanical states are present at the same energy, these levels are known as degenerate energy levels.

An electron orbit around an atom's nucleus is referred to as an electron shell or energy level in chemistry. This atomic model by Bohr states that the electrons follow a circular path around the nucleus known as an orbit.

The "K shell" is the shell that is closest to the nucleus; it is followed by the "L shell," the "M shell," and so forth as one moves farther from the nucleus. Quantum numbers (n = 1, 2, 3, 4, etc.) or alphabets (K, L, M,...) can be used to represent the shells.

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in the experimental procedure, what is the advantage to performing the reaction in methyl ethyl ketone - a solvent with a high boiling point?

Answers

The advantage to performing the reaction in methyl ethyl ketone - a solvent with a high boiling point is to carry the reaction in the forward direction by refluxing the set.

What is boiling point?

Boiling point is defined as the bulk phenomenon. It is the temperature at which the pressure of atmosphere is equal to the pressure of the vapour or vapour pressure.

Since, high boiling point solvent are used during the procedure to reflux the set which help in carrying out the reaction in the forward direction. If we had used low boiling point solvent instead of high all of the solvent evaporated and refluxing of the mixture of reaction to get product for maximum production could not have been possible.

Thus, we concluded that the advantage to performing the reaction in methyl ethyl ketone - a solvent with a high boiling point is to carry the reaction in the forward direction by refluxing the set.

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what is not true of fuels? group of answer choices they are found in three basic states they can only be volatilized and consumed in the liquid state * they are characterized as any substance that will burn or support combustion wood does not burn

Answers

The statement which is not correct about Fuel is that wood does not burn.

Hence, option D is not correct

What do you mean by Fuel?

Fuel can be defined as any substance that upon combustion produces a usable amount of energy which is generally known as fuel.The characteristics of good fuel includes that it should have a high calorific value, environment-friendly and should burn completely without leaving any residue. Fuel should be cheap and readily available. The burning of wood will include an indirect reaction.

Examples include : wood, coal, biogas, LPG, petrol, diesel etc.

Types of Fuels:

Solid Fuels.Liquid Fuels.Gaseous Fuels.

Hence, The statement which is not correct about Fuel is that wood does not burn.

Hence, option D is not correct

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What effect does high temperature have on potato germination

Answers

Answer:

High temperatures reduced the growth of tubers more than of shoots. Photosynthetic rates were unaffected or increased slightly at the higher temperature. Heat stress increased the accumulation of foliar sucrose and decreased starch accumulation in mature leaves but did not affect glucose.

Explanation:

i hope this helped <3

What mass of mgf2 is contained in 80. 85 g of a 22. 4% by mass solution of mgf2 in water?.

Answers

18.1 g is mass of mgf2 is contained in 80. 85 g of a 22. 4% by mass solution of mgf2 in water.

solution mass = 80.85 g

mass of solution percentage = 22.4%

% concentration = Mass of solute/Mass of solution × 100/1

22.4 = x/80.85 × 100/1

x = 22.4 × 80.85/100

x = 18.1 g

The quantity of substance that makes up an element's atom is known as its atomic mass. One-twelfth of the mass of the carbon-12 atom, with an assigned atomic mass of 12 units, is expressed as a multiple of 1.992646547 1023 gram, or in other words, 1.992646547 gram. One atomic mass unit is equivalent to 1.660539040 1024 grams on this scale (amu). The atomic mass unit is sometimes referred to as the dalton in honor of English scientist John Dalton (Da).

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the spectrophotometer available to the student has a wavelength range of 400nm to 700nm. what wavelength should the student use to minimize the interference from the presence of the co2 (aq) ions?

Answers

The wavelength should be 600 nm to minimize the interference from the presence of the CO{2+} ions (aq).

What is spectrophotometer?

An analytical tool called as spectrophotometer is used to determine the emission or reflection of visible light, UV light, or infrared light objectively. These are used to calculate intensity as a function of light source wavelength.

The spectrophotometer available to the student has a wavelength range of 400 nm to 700 nm. The maximum wavelength for CO{2+} curve is 500 nm. The two curves of CO{2+} and Cu{2+} intersects at 600 nm.

So, 600 nm should the student use for interference minimization for the presence of CO{2+} ions.

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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?

Answers

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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How Much Mass Does 2.1 X 1023 Molecules Of H2O2 Have? (2024)

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