How many moles of oxygen atoms are in 4.14 moles of magnesium phosphate: mg3(po4)2 (mw. 262.87 g/mol)?

As long as the sample has the same number of atoms for both elements, the mass ratio is independent of the sample size.

The arithmetic mean is calculated by adding a set of numbers, dividing by their count, and then taking the result. The molecular masses of different substances vary. Therefore, variable numbers of atoms, molecules, or moles exist in masses of equal mass. On the other hand, equal quantities of moles of different substances have different masses. The result will be disproportionately impacted by the one data point if you attempt to calculate an "average of averages". In essence, the value of the average of 10,000 data points is the same as that of the average of a single data point.

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Answer:

3 Significant Figures.

Explanation:

The zeros to the left of non-zero numbers are Leading Zeros. These zeros are NOT significant. They serve as placeholders to locate the decimal point.

Answer:

3

Explanation:

To determine the number of significant figures in a number use the following 3 rules:

Non-zero digits are always significant

Any zeros between two significant digits are significant

A final zero or trailing zeros in the decimal portion ONLY are significant

Example:  .500 or .632000 the zeros are significant

                .006  or .000968 the zeros are NOT significant

In the mass spectrum of pentane, the presence of a peak with an m/z = 29 most likely is due to the loss of butyl radical from the molecule.

A spectrum (spectra or spectra) is a state that is not confined to a particular set of values ​​and can vary seamlessly on a continuum. The term was first used scientifically in optics to describe the rainbow colors of visible light after passing through a prism.

The Spectrum of Life in the Hall of Biodiversity is an evolutionary journey through the incredible diversity of life on Earth. The 1,500 specimens represent a wide range of bacteria, fungi, plants and animals, from the smallest microbes to giants of land and water. A spectrum is defined as the characteristic wavelengths of electromagnetic radiation (or parts thereof) emitted or absorbed by an object or substance, atoms or molecules. Examples of spectra include the rainbow, the colors of the sun's emission, and infrared absorption wavelengths of molecules.

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If reaction occurs with an 73.9% yield, the mass of iron which should be reacted to produce 63.0 g of Fe₂O₃ is 59.1 g

The balanced chemical equation of the reaction is :

                   4Fe + 3O₂ → 2Fe₂O₃

Molar ratio of iron and Fe₂O₃ is 4 : 2

For a reaction having 100 % yield, every 4 mole of iron will produce 2 moles of Fe₂O₃.

So, 63.0 g of Fe₂O₃ is produced by reaction. Let's use molar mass of Fe₂O₃ , which is 159.6 g/mol to find out number of moles produced.

              moles =      63.0 g     = 0.39 mol

                             159.6 g/mol

moles of iron needed  if % yield is 100.  

= 0.39 mol x 4 mol

                      2 mol

= 0.78 mol Fe

Since given percentage yield is 73.9%, more Fe is reacted.

       % yield =    actual yield     x 100

                      theoretical yield

         73.9 % =         63.0 g           x 100

                         theoretical yield

         Theoretical yield = 85.2 g

So, to find out mass of iron reacted to theoretically produce 85.2 g Fe₂O₃

Use molar mass of Fe and mole ratio of two compounds.

        moles = 85.2 g         = 0.53 moles Fe₂O₃

                     159.6 g/mol

using this,

 = 0.53 Fe₂O₃  x     4 moles Fe    

                 2 moles Fe₂O₃

 = 1.06 moles Fe

So,

The mass of iron = ( 1.06 x 55.8 )g

                            = 59.1 g

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Wastewater, another name for liquid waste, has a very diverse composition that primarily depends on its source. Residential, commercial, and industrial regions are the three primary sources in towns and cities.

What are liquid wastes?

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Control Experiment: Those experiment where a control is taken as a reference to notice the changes in same reaction in the presence of external stress.

Need for a control in a experiment: The control is required to analyse the effect of stress applied to reaction. For e.g. If there are two compounds AB and XY & they are undergoing displacement reaction to form AX & BY, But all sudden another salt let MN is added into the reaction then there are possibilities of formation of different products depending upon the reactivity of initial reactants and external compound. The product can be same as our Control i.e. AB & XY if MN remains inert in the reaction. That's why control is important to compare the results.

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The composition, in atom percent, of an alloy that consists 90.5 wt Ag and 9.5 wt Cu is 84.5% and 15.2%.

Here, the lever rule is used to determine the composition of co-existing phases which are, Ag and Cu, of an alloy.

The given data is :

To calculate composition of silver, expression used is,

  C(Ag) =                W(Ag) × M(Cu)                 x 100

                ( W(Ag) × M(Cu) + W(Cu) × M(Ag) )

Substituting the values in the above expression,

  C(Ag) =                ( 90.5 × 63.55 )                x 100

                    ( 90.5 × 63.55 + 9.5 × 107.87 )

        C(Ag) = 84.5%

To calculate composition of copper, expression used is,

  C(Cu) =                W(Cu) × M(Ag)                  x 100

                ( W(Ag) × M(Cu) + W(Cu) × M(Ag) )

Substituting the values in above expression,

  C(Cu) =             (9.5 × 107.87)              x 100

                ( 90.5 × 63.55 + 9.5 × 107.87 )    

        C(Cu) = 15.2%

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The object would not float but sink in water.

The term density refers to the ratio of the mass to the volume of a body. Now that we know that the density of water is 1 g/cm^3. A substance that would float in water must have a lower density than that of water.

Thus;

Mass of the object = 569 kg or 569000 g

Volume of the object = 74.0 cm x 55.0 cm x 35.0 cm = 142450cm^3

Density of the object = mass/ volume = 569000 g/142450cm^3

=  3.99 g/cm^3

Hence, the object would not float but sink in water.

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Answer:2.5 mol

Explanation:

The best site for tritium labeling would not exchange the tritium ions for protons in water. All of the N−H sites (II−IV) would readily exchange tritium protons due to their lone pair-facilitating protonation and subsequent tritium exchange with water, but the C−H site (I), lacking a lone pair, would retain its tritium label.

Water is an inorganic, clear, tasteless, odorless, nearly colorless chemical substance that is the main component of the earth's hydrosphere and the fluid of all known living organisms. Although it provides no food, energy, or organic micronutrients, it is essential to all known forms of life.

There are three atoms in the water molecule. Two hydrogen atoms (H) and one oxygen atom (O). This is why water is sometimes called H2O. One drop of water contains billions of water molecules. Water is wet in the sense that it is a highly mobile liquid. This is because the molecules are fairly loosely bound and thus have low viscosity.

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Solute : The minor component in a solution mixed in the solvent. Example - Salt, Sugar, Carbon dioxide (CO2) , Acetic acid etc.

Solvent : The substances that are used to disslove solutes ( this may be in the form of solid, liquid and gases) is known as solvent. Example : Water, Milk, Air , Ethanol, Methanol etc.

Solution : A solution is a homongeneous composition of one or more solutes mixed in a solvent. Example : Salt Water, Sugar mixed in water,  Alcohol in water etc.

Types of Solution : Hypotonic , Isotonic, Hypertonic.

According tov question,

100 mm solution of glucose is more concentrated than 0.1 m solution of glucose because when we try to find the molality of 100 mm solution it is 0.617 m hence 100 mm solution of glucose is greater.

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6 vibrational degrees of freedom in dichloromethane (ch2cl2)

No of independent way in which a molecule or an atom can exhibit motion is called degree of freedom Here, dicloromethane is a non linear molecule that's why degree of freedom for non linear molecule is 3N-6. here N= no of atom involved in that molecule so in dicloromethane 3N-6=3×4-6=12-6=6

Therefore in dichloromethane 6 vibrational degree of freedom

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Answer:

Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. They have eight valence electrons, which fill their outer energy level.

Explanation:

Answer:

Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. Noble gases are the least reactive of all elements. That's because they have eight valence electrons, which fill their outer energy level.

The correct answer is 2255 bicycles. (b) 50 frames left over, 305 wheels left over (c) the handlebars.

A manufacturer of bicycles has 4815 wheels, 2305 frames, and 2255 handlebars.First, each bicycle has 2 wheels, so the total pairs of wheels is 4815/2 = 2507.5.

The total amount of bicycles that the manufacturer can make is equal to the smallest number of a determined part that he has, in this case is 2255.This is because he only has 2255 handlebars, after he makes 2255 bicycles, he runs out of handlebars, and can not make more.then with the parts listed in the problem, the manufacturer can do 2255 bicycles

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Start by setting up your materials you would put one plant in mulch and one without. After 2-3 weeks of proper care of the plants you record your findings, did the plant grow more without without the mulch?

A  Slump is a type of mass movement where the material stays fairly coherent and moves over a well-defined surface.

What is a slump?

A slump is a colloquial expression denoting a precipitous drop in commercial activity, trade, or market values. The term "slump" is particularly adaptable since it may be used to refer to both a brief, abrupt collapse and a longer-lasting, more steady period of low activity or value. There are downturns in the markets, the economy, industries, and incomes, among other things.

A slump typically refers to the start of a recession in economic terms. The months prior to the official announcement of a recession are simply referred to as a protracted economic slump because a recession is not officially announced until several months of decreased activity have passed.

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4 liters of the 10% solution are needed.

ω₁ = 4% ÷ 100% = 0.04; mass percentage of 8 liters solution

V₁ = 8 L; volume of 4% solution

ω₂ = 10% ÷ 100% = 0.1; mass percentage of solution

ω₃ = 6% ÷ 100% = 0.06; mass percentage of the final 6% solution

V₂ = ?; volume of 10% solution

V₃ = V₁ + V₂; volume of the final 6% solution

ω₁ · V₁ + ω₂ ·V₂ = ω₃ · V₃; formula to calculate volume of the solution

0.04 · 8 L + 0.1 · V₂ = 0.06 · (8 L + V₂)

0.32 L +  0.1 · V₂ = 0.48 L + 0.06 · V₂

0.04 · V₂ = 0.16 L

V₂ = 0.16 L ÷ 0.04

V₂ = 4 L; volume of the 10% solution

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Water has more structure than other liquids due to its ability to form hydrogen bonds. due to this phenomena, water expresses a comparatively high density , which allows it to cushion and protect the body’s structures.

What causes density?

The density of a substance is that the relationship between the mass of the substance and how much space it takes up (volume). The mass of atoms, their size, and the way they are arranged determine the density of a substance. Density equals the mass of the substance divided by its volume; D = m/v.

Why is density important?

Density is a crucial concept because it allows us to determine what substances will float and what substances will sink when placed in a liquid. Generally, substances float goodbye as their density is less than the density of the liquid they are placed in.

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In 1904, J.J. Thomson published the Thomson model of the atom. The plum pudding model is often referred to as Thomson's model.

In 1897, he also made the electron discovery. Scientists Rutherford and Bohr subsequently refuted this theory. According to J.J. Thomson, an atom is a positively charged sphere with embedded negatively charged electrons.

Neils Bohr disproved it by demonstrating that any atom's mass is centred in its positively charged centre, while negatively charged electrons orbit the positive centre. In highly quantized energy levels, according to Bohr's theory, electrons orbit an atom's nucleus rather than being incorporated into it.

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The number of residues separated amino acids that are stabilized by hydrogen bond in α helices is 3.6 amino acids residue.

When the  two or more amino acid combine to form a peptide and the water is removed then the remain of each amino acid is called amino - acids residue.

The amino group of one amino acid interacts with carboxyl group of other amino acid  to form peptide bond.

The α helix is stabilized by hydrogen bonds between the carbonyl oxygen  and amino group of every third residue in the helical turn and with each helical turn consists 3.6 amino group.

Thus, alpha - helices have 3.6 amino acids residue per turn. This means that helix 36 amino acids long form 10 turns.

Therefore, number of residues separated amino acids that are stabilized by hydrogen bond in α helices is 3.6 amino acids residue.

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If an object weighs 38.325 lbs = 17,400 g would be mass in grams

In physics, mass is a numerical representation of inertia, which is a basic characteristic of all matter. The resistance a body of matter offers to a change in its speed or location as a result of the application of a force is what it is in essence. The change a force applies produces a change that is smaller the more mass a body has.

The kilogram, which is defined in terms of Planck's constant as equal to 6.62607015 × 10^ -34 joule second, is the unit of mass in the International System of Units (SI). One kilogram times one square meter per second squared is equivalent to one joule.

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The answer to this question is

0.0037 ml is the measurement which has only non-significant figures.

The basic rules of significant figures are:

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One molecule of nabh4 will reduce only two molecules of m-acetylbenzaldehyde to form the corresponding product because there are only two functional groups that can react with NaBH4, namely the ketone and the aldehyde, but NaBH4 had four H present to protonate the molecule.

What is protonation?

An atom, molecule, or ion can be protonated by adding a proton to it. The difference between protonation and hydrogenation is that during protonation, the protonated species' charge changes, whereas it remains unchanged during hydrogenation. Numerous catalytic processes result in protonation.

A conjugate acid is created when a proton (or hydron, or hydrogen cation), (H+), is added to an atom, molecule, or ion. Deprotonation is the analogous process that occurs when a proton is taken out of a Bronsted-Lowry acid.

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Answer:

Bohr's model of hydrogen is based on the nonclassical assumption that electrons travel in specific shells, or orbits, around the nucleus.

Explanation:

hope this helps and have a great day

In chemical communication between cells, a secretory cell secretes a chemical messenger that binds to receptors on the target cell.

Cells are the basic building blocks of all living things. The human body is made up of trillions of cells. They give structure to the body, absorb nutrients from food, convert those nutrients into energy, and perform specific functions. In multicellular organisms, such as higher plants and animals, specialized cell groups are organized into tissues and organs.

Cells can be used as the basis for describing organisms as unicellular or multicellular. Unicellular organisms are organisms that have only one cell, i.e. single-celled organisms. Prokaryotes and protists are examples. Multicellular organisms are organisms with more than one cell. Examples are plants and animals.

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The first deaf Africans American alumnus of Gallaudet to earn a doctorate was Dr. Glenn B. Anderson in 1982.

As the first Deaf African-American doctor in the United States, Dr. Glenn B. Anderson is well-known in his field.

He was born and reared on Chicago's South Side, and at the age of seven, he lost his hearing. His parents advised him "you have to be twice as excellent as everyone else to succeed" when they encountered difficulties and challenges in his early life.

Dr. Anderson graduated with a bachelor's degree in psychology from what was then the Gallaudet College in 1968, and he then went on to the University of Arizona to get a master's degree in rehabilitation counseling.

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All of the amino acids could form a hydrogen bond with another amino acid in the chain to stabilize the secondary structure of a b-pleated sheet.

Protein is composed of amino acid linked with peptide bond.

Hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (H), covalently bound to a highly electronegative atom such as flourine (F), oxygen (O) and nitrogen (N) atoms.

In a beta-pleated sheet, hydrogen bonds are formed between carbonyl and amino groups of backbone (see the picture below).

Usually, amino acid proline is found in the edge strands in beta-sheets. Beta-branched amino acids valine, threonine and isoleucine and aromatic amino acid residues tryptophan, tyrosine and phenylalanine are found middle of beta-sheets.

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The diameter water pipe is required to handle 0.075 m3/s and a 500 kpa pressure drop is 149.4mm.

The force applied perpendicularly to an object's surface, denoted by the symbol p or P, is stated to be applied per unit area that the force is claimed to be dispersed over. The pressure that is supposed to be related to the ambient pressure is called the gauge pressure, also known as gauge pressure.

[tex]Q=0.075m^3/s[/tex]

ΔP=500kPa

L=175m

e=2.5mm

Properties of water :

[tex]\rho=1000kg/m^3[/tex]

[tex]\mu=0.001N-s/m^2[/tex]

Reynold's number Re=ρVD/μ

where V= Q/A=Q/(π/4)[tex]D^2[/tex]=4Q/π[tex]D^2[/tex]

Re=(ρ(4Q/π[tex]D^2[/tex])D)/μ

=4ρQ/πDμ=4(1000kg/[tex]m^2[/tex])(0.075[tex]m^3[/tex]/s)/πD(0.001N-s/[tex]m^2[/tex])

Re=(95492.966/D)

Darcy friction formula

f=1.325/[ln(e/3.70+5.74/[tex]Re^{0.9}[/tex])[tex]]^2[/tex]

f=1.325/[ln(e/3.70+5.74/(95492.966/D[tex])^{0.9}[/tex])[tex]]^2[/tex]____(1)

from, [tex]h_L[/tex]=8fL[tex]Q^2[/tex]/g[tex]D^2[/tex][tex]\pi^2[/tex]

Δρ/ρμ=8FL[tex]Q^2[/tex]/[tex]\pi^2[/tex]g[tex]D^5[/tex]

500×[tex]10^3[/tex]Pa/(1000kg/[tex]m^3[/tex])=8f(175m)(0.075[tex]m^3[/tex]/s[tex])^2[/tex]/[tex]\pi^2[/tex][tex]D^5[/tex]

f/[tex]D^5[/tex]=626.642

f=626.642[tex]D^5[/tex]_____(2)

solving equation 1 and 2

we get f=0.0467 and D=0.1494m

D=149.4mm

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Peptide bonds, hydrogen bonds, disulfide linkages, van der Waals, and electrostatic forces of attraction are the chemical bonds that stabilize the different structures in primary, secondary, tertiary, and quaternary structures.

The advanced structure of proteins gives rise to two kinds of major molecular shapes which are fibrous as well as globular structures. The main forces which are involved in stabilizing the secondary along with the tertiary structures of proteins include hydrogen bonds, disulfide type linkages, van der Waals attraction, and electrostatic forces of attraction.

The primary structure is generally determined by adjoining peptide bonds where the link is adjoining amino acids in sequential order. Tertiary structure is determined by the existence of disulfide bonds in between hydrophobic interactions as well as cysteine residues whereas the quaternary type structure is determined by multiple subunits of a protein that undergo various interactions.

Hydrogen bonds exist in a protein molecule as its large number can form between adjacent regions of the polypeptide chain in folded form and stabilize its three-dimensional kind of shape.

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