How do you calculate to find the mass ( in grams) in one 1H atom?

Answer:

It gives the same result when an experiment is repeated.

Explanation:

Below are the possible answers to the question:

It is biased.

It cannot be verified.

It cannot add new evidence to existing evidence.

It gives the same result when an experiment is repeated.

The correct answer would be that it gives the same result when an experiment is repeated.

If a reaction is conducted in chemistry and certain results are obtained, once a detailed procedure of the experiment is known along with all the chemicals involved, such reaction/experiment can be repeated anywhere in the world and the same result would be obtained.

The repeatability of experiments always makes the experiments to be reliable. Hence, chemistry is reliable because it gives the same result without any variation when experiments are repeated under similar conditions.

The answer responses to  the structures shown in the diagram are:

A. chromosomes

C. They would be the same.

B. They are in pairs because each one comes from a different parent.

The chromosomes are in pairs because humans have a diploid number of chromosomes, meaning they have two sets of chromosomes, one inherited from each parent.

The nucleus is important in eukaryotic cells and has many important parts that help the cell work properly. There are some parts inside cells called the nuclear membrane, nucleoplasm, nucleolus, and chromatin. Chromatin is made up of DNA and other proteins.

Every part of a person's body has the same genes, but the way they are organized can be different in different types of cells. The chromosomes in our skin cells might not be the same as the chromosomes in our muscle cells, even if they come from the same person.

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Identify the structures shown.

A. chromosomes

B. mitochondria

C. nuclei

D. vacuoles

C

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Explain why the structures are in pairs.

A. They aren't in pairs.

B. They are in pairs because each one comes from a different parent.

C. This cell is making a copy of itself.

D. The cell always has 2 copies in case 1 is damaged.

This  problem provides the molar mass and radius of a metal that has an FCC unit cell and the density is required.

Firstly, we begin with the formula that relates the aforementioned variables and also includes the Avogadro's number and the volume of the unit cell:

\(\rho=\frac{Z*M}{V*N_A}\)

Whereas Z stands for the number of atoms in the unit cell, M the molar mass, V the volume and NA the Avogadro's number. Next, since FFC is able to hold 4 atoms and M and NA are given. Next, we calculate the volume of the atom in the unit given the radius in meters:

\(V=a^3=(2*1.92x10^-10m*\sqrt{2} )^3=1.60x10^{-28}m^3/atom\)

And finally the required density in g/cm³:

\(\rho=\frac{4*241.5g/mol}{1.60x10^{-28}m^3/atom*6.022x10^{23}atom/mol} \\\\\rho=10025739g/m^3=10.03 g/cm^3\)

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The mass of the rectangular piece of copper is 18,869 g (approx).In conclusion, the mass of a rectangular piece of copper with dimensions 24.4cm x 11.4 cm x 7.9 cm and a density of 8.92 g/cm³ is 18,869 g (approx.).

The given dimensions of the rectangular piece of copper are:Length = 24.4 cmWidth = 11.4 cmHeight = 7.9 cmThe formula to calculate the mass of an object is given by;

Mass = Density x Volume

Here, the density of copper is given as 8.92 g/cm³.

Therefore, the first step is to calculate the volume of the rectangular piece of copper.The formula to calculate the volume of a rectangular object is given by:

Volume = Length x Width x Height

So,Volume = 24.4 cm x 11.4 cm x 7.9 cm= 2115.432 cm³Now we will use the mass formula:

Mass = Density x Volume= 8.92 g/cm³ x 2115.432 cm³= 18,869.27824 g= 18,869 g (approx.)

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To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.

To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.

If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).

However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.

In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.

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If 60 grams of the substance are added to 100 g of water, the solution can be categorized as supersaturated.

The graph shows the number of grams that can be dissolved in 100 grams of water at different temperatures. In general, solubility increases with temperature.

According to the graph, at a temperature of 30°C, it is possible to dissolve a total of 48 to 49 grams of \(KNO_{3}\). This information implies that if we add 60 grams at this temperature not all the substance would be dissolved, and therefore the solution would be supersaturated.

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Answer:

The final volume \(V2=1.3175L\)

Explanation:

between work ( w), pressure ( P ) and volume ( V ) is the following:

w=−PΔV

where,

ΔV=V2−V1

It was stated that the gas is expanding, then the work is done by the system and it is of a negative value .

Note that work, should be expressed in 1L⋅atm=101.3J

CHECK THE ATTACHMENT FOR DETAILED EXPLATION

Answer:

0.2553669915026199 BaSO4

Explanation:

hi, give brainliest?

Answer:

c. Ralph's classmate observing Daphnia in water at 30oC, 32oC and 34oC

Explanation:

When we talk about replication, we actually mean, repetition of a scientific procedure carried out by another scientist and obtaining the same results as he/she previously did.

Replication is carried out under identical conditions as the first scientist did. If Ralph's classmate wants to replicate Ralph's work, then identical temperature conditions of 30oC, 32oC and 34oC must be used, hence the answer above.

For working with monomer liquids and polymer powders, medium beads are the ideal mix ratio.

A monomer is a molecule of any one of a group of primarily organic chemicals that can combine with other molecules to generate much larger molecules, or polymers. A monomer's ability to form chemical bonds with at least two other monomer molecules, known as polyfunctionality, is its primary characteristic. Bifunctional monomers can only create linear, chain-like polymers, whereas higher functional monomers can create cross-linked, network polymeric products.

functional group: polymers and monomers

functional group: polymers and monomers

Monomers that have either a double bond between two atoms or a ring of three to seven atoms are known to undergo addition reactions; examples include styrene, caprolactam (which produces nylon-6), butadiene, and acrylonitrile (which copolymerize to form nitrile rubber, or Buna N).

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Answer:

I think B. O2+

Explanation:

Answer:

B

it must be O2- not O2+, because it's an anion not a cation.

Answer:

If you add the masses of all the products after fission, they are LESS than the mass of the reactants.

Explanation:

A nuclear fission reaction is a radioactive reaction which in which a heavy nucleus spontaneously disintegrates into 2 lighter nuclei and some neutrons with a release of large amount of energy.

When nuclear fission occurs, a mass deficit between the decaying nuclei and the product occurs. It is this mass that actually yields the energy that is produced as a by product of the reaction.

Once alcohol is in the bloodstream it will reach the brain in a few seconds to minutes, depending on various factors such as the amount and concentration of alcohol consumed, body weight, metabolism, and other individual factors.

Alcohol can swiftly cross the blood-brain barrier after it is ingested, having an impact on the brain and neurological system. Depending on the quantity and frequency of drinking, alcohol's effects on the brain can range from minor disturbances in judgment and coordination to more serious consequences including loss of consciousness and, in the worst circumstances, death.

Long-term changes in brain structure and function, such as cognitive impairment and a higher chance of developing specific neurological and mental illnesses, can also result from chronic alcohol consumption.

Once alcohol is in the bloodstream it will reach the brain in a few seconds to minutes, depending on various factors such as the amount and concentration of alcohol consumed, body weight, metabolism, and other individual factors.

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toThis is a Valid statement about pressure .

What is pressure?

Pressure is continues physical force exerted on or against an object by something in contact with.

Sol-We know the idol gas equation, idyl gas equation. P v is equals to n r t. We can write the equation. As of the p is equal to n r upon v into p. Now n r upon v is equals to constant, is equals to constant. So we can write. P is equal to c into t. So now let us consider the ambient by the  condition, which is p not equals to 101325 p. A and t naught is equal to 90 degrees. Fahrenheit will convert this value kelvin and get 5048.37 kelvin. So the value of p, not anti. Note is 0 now from the modified idol equation. We are have p equal to c t, so we can write it as a p. Not is equal to c and t not so the we'll substitute the values 1013 to 5 p, a which is equal to c 2348.37 kelvin.

So here we get the value of c, which is equals to 43.147. So from this we can say that the change by  in pressure for the 10 degree temperature by the  drops so here delta equal to delta, which is equal to the 10 degrees fahrenheit. We can again convert this value in the kelvin and we get 260.93 kelvin, so delta to  p is equal to c into delta. This will be delap equals to 43.147, as we get the value of c and 2 red 60.93 kelvin p, so delta p is equal to 43.147 So from this we can say We can again convert this value in the kelvin by it  and we are get the 260.93 kelvin, so delta p is equal to c into delta. This will be delap equals to 43.147, as we get the value of c and 2 red 60.93 kelvin p, so delta p is equal to 43.147 and 260.93 kelvin upon 694.75 p s. I so we are finally get the value of delta p, which is equals to 1.63 p s. I.

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Answer:

the best guess would have to be C

Answer:

Jet ğıpep2pep2p2pp3oroe88r82

Answer:

a liquid cooling

Explanation:

Liquid cooling results in liquid (more disorder) turning to solid (less disorder).

Entropy describe disorder in our system. Going from more disorder to less disorder decreases entropy.

Rest of the options increase entropy b/c gas escaping from tire releases gas from confined shape to vast environment, snow melting turns solid (order) into liquid (less order), and salt dissolving turns solid into liquid form.

Answer:

X(HCO3)2 is X2(C2H2O6), so the total number of atoms for each element can be calculated:

2 X atoms

4 H atoms

6 C atoms

12 O atoms

Calculate the total atomic mass of the elements:

2 X atoms * atomic mass of X = 2X * atomic mass of X

4 H atoms * 1.0 amu = 4.0 amu

6 C atoms * 12.0 amu = 72.0 amu

12 O atoms * 16.0 amu = 192.0 amu

The molar mass of X(HCO3)2 is 162 g/mol, so the total atomic mass of the elements should add up to 162 g/mol:

2X * atomic mass of X + 4.0 amu + 72.0 amu + 192.0 amu = 162 g/mol

Solve for X by rearranging the equation:

2X * atomic mass of X = 162 g/mol - 4.0 amu - 72.0 amu - 192.0 amu = -12.0 amu

2X = -12.0 amu / atomic mass of X

Divide both sides by 2:

X = -6.0 amu / atomic mass of X

So the relative atomic mass of X is 6.0 amu.

The Fe^3+ is reduced in the reaction while the Al is oxidized in the reaction. The species that loses electrons (is oxidized) is called the reducing agent

A redox reaction (short for reduction-oxidation reaction) is a type of chemical reaction that involves the transfer of electrons between two or more species. In redox reactions, one reactant loses electrons (is oxidized) while another gains electrons (is reduced).

The species that loses electrons (is oxidized) is called the reducing agent, since it causes another species to be reduced. The species that gains electrons (is reduced) is called the oxidizing agent, since it causes another species to be oxidized.

Reduction half equation;

2Fe^3+(aq)  + 6e -----> 2Fe(s)

Oxidation half equation;

2Al(s) →2Al3+(aq) + 6e

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a. Titration Curve:

On the x-axis, label it as "Volume of HCl added (mL)"

On the y-axis, label it as "pH"

b. Equivalence Point:

The equivalence point is the point in the titration where the moles of acid (HCl) added are stoichiometrically equivalent to the moles of base (unknown base) present initially. In the given data, the equivalence point can be estimated to be around 25.0 mL of HCl added. This is where the pH drops dramatically from 7.88 to 5.28, indicating the neutralization of the base.

c. Calculation of Kb Value:

To determine the Kb value, we need to find the pOH at half-neutralization, where half the volume of the equivalent point has been reached. In this case, the half-neutralization volume is 12.5 mL (half of 25 mL).

From the data, we can observe that at 12.5 mL of HCl added, the pH is 9.26.

pOH = 14 - pH = 14 - 9.26 = 4.74

pOH = -log[OH-]

[OH-] = 10^(-pOH)

[OH-] = 10^(-4.74)

To find [OH-] in moles per liter (M), we need to convert mL to L.

[OH-] = 10^(-4.74) mol/L

Now, since we know that at the equivalence point, the concentration of the acid (HCl) is 0.10 M, we can use the stoichiometry of the reaction to determine the concentration of the base (unknown base).

From the balanced equation:

HCl + OH- → H2O + Cl-

1 mole of HCl reacts with 1 mole of OH-

0.10 M (HCl) = [OH-] M (unknown base)

Therefore, Kb = [OH-][unknown base] / [base]

Kb = (10^(-4.74) mol/L)(0.10 M) / (0.10 M - 10^(-4.74) M)

Simplify and calculate Kb.

c. Selection of Indicator:

Based on the given pKa ranges of the indicators, the indicator phenolphthalein (pKa range: 8.3 - 10.0) would be appropriate for this titration. The reason is that the pH at the equivalence point is expected to be around 7, which is well within the range of phenolphthalein's color change. Bromophenol Blue and Methyl Red have lower pKa values and would not be suitable for indicating the equivalence point in this particular titration.

d. Calculation of Molarity and % Ionization of the Weak Base Solution:

To calculate the molarity of the weak base solution, we can use the Henderson-Hasselbalch equation:

pH = pKa + log([A-]/[HA])

At the half-neutralization point, [A-] = [HA], and the pH is 9.26.

9.26 = pKa + log([A-]/[HA])

The pKa can be determined using the pOH at half-neutralization:

pKa = 14 - pOH = 14 - 4.74 = 9.26

9.26 = 9.26 + log([A-]/[HA])

log([A-]/[HA]) = 0

[A-]/[HA] = 10^0 = 1

Since [A-] = [HA], the concentration of the weak base (before titration) is equal to the concentration of its conjugate acid.

Therefore, the molarity of the weak base solution is 0.10 M.

To calculate the % ionization of the weak base, we can use the formula:

% Ionization = ([A-]/[HA]) × 100

% Ionization = (1/0.10) × 100

% Ionization = 1000%

Note: The % ionization may exceed 100% in cases where the concentration of the conjugate acid is very small compared to the concentration of the weak base.

Since orbital period depends on how far you are from the sun, planets closer to the sun have a orbital period less than one earth year.

These planets are Mercury and Venus

Answer:

A.wood

Explanation:

It is a poor conductor of heat

If the plants in yellow light grow faster during her experiment, Lana should repeat the experiment to confirm the result. Option D.

In science, hypotheses are tested using experiments. Two hypotheses are usually formed during the course of experimentation:

The null hypothesis is set up to either be accepted is found to be true or rejected if found to be false. The alternate hypothesis is just there for guidance.

Hypotheses being found not to be true does not always mean that the reverse will be true.

Thus, if a complete opposite is obtained during testing, the next thing would be to repeat the experiment in order to be double sure there was not a mistake.

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Answer:

more

Explanation:

bc it makes science so I hope you get it tight.

1.6moles

The formula for calculating the molarity of a solution is expressed according to the equation:

Given the following parameters

volume of solution = 400mL = 0.4L

molarity of the solution = 4M

Determine the moles present

Hence the number of moles present is 1.6moles

The volume of the gas at STP would be 23.93 liters.

The volume of gas at STP (Standard Temperature and Pressure), we need to use the Ideal Gas Law, which states that PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the gas constant, and T is temperature. First, we need to calculate the number of moles of gas in the initial sample. We can use the formula n = PV/RT, where P is the initial pressure, V is the initial volume, R is the gas constant, and T is the initial temperature.
n = (2.31 atm) x (25.15 L) / [(0.0821 L atm/mol K) x (201 + 273.15 K)]
n = 1.067 moles

Now, we can use the molar volume of gas at STP, which is 22.4 L/mol, to calculate the volume of gas at STP.
V = n x 22.4 L/mol
V = 1.067 moles x 22.4 L/mol
V = 23.93 L
Therefore, the volume of the gas at STP would be 23.93 liters.

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We can see here that the catalytic cycle for the hydrogenation of alkenes using Wilkinson's catalyst involves several steps.

Here's an overview of the catalytic cycle, including the necessary details:

i. Chemical structure of the catalyst:

Wilkinson's catalyst, also known as chloridotris(triphenylphosphine)rhodium(I), has the following chemical structure: [RhCl(PPh3)3]

ii. Molecular geometry of the catalyst:

The Wilkinson's catalyst has a trigonal bipyramidal geometry around the rhodium center. The three triphenylphosphine (PPh3) ligands occupy equatorial positions, while the chloride (Cl) ligand occupies an axial position.

iii. Type of reactions involved:

The catalytic cycle involves several reactions, including:

iv. Starting material, reagent, and solvent:

The starting material is an alkene, and the reagent is Wilkinson's catalyst ([RhCl(PPh3)3]). The reaction is typically carried out in a suitable solvent, such as dichloromethane (CH2Cl2) or tetrahydrofuran (THF).

v. Major and minor end-products:

The major end-product of the hydrogenation reaction is the fully saturated alkane, resulting from the addition of hydrogen across the double bond. The minor end-product may include cis- or trans-configured alkanes if the original alkene substrate possesses geometric isomers.

vi. Intermediates:

The intermediates in the catalytic cycle include:

These intermediates play a crucial role in facilitating the hydrogenation reaction and enabling the catalytic cycle to proceed.

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To find the density of the unknown piece of metal, we can use the formula:

Density = mass / volume.

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Answer:

Convection is when heat is transferred by the movement of something fluid like air or water.

An example is a radiator. It puts warm air out at the top and draws in cooler air at the bottom, transferring heat through air.

A convection oven is an example; it circulates hot air through the oven's interior to cook food faster, by transferring heat.