calculate the volume occupied by 6.4g of oxygen, 02 at stp?,​

There is no answer, science is about empirical knowledge, technology is the sum of techniques, skills, methods, and processes. I do not believe that you will find a answer for that.

Answer:

This:

Explanation:

Black holes occur when a massive star or larger reaches the final stage of it's lifespan. The star implodes and a black hole is the dying star's remains

Answer:

65 g/100 mL of water

Explanation:

Answer:

65g/100ml of water.

Explanation:

Edge 2021.

We are able to determine a molecule's shape using the VSEPR theory.

The VSEPR theory assumes that the molecular shape minimizes these repulsions and that all electron pairs, including bonding pairs and lone pairs, repel one another, particularly when they are close to one another.

The molecule's geometry can be determined with the help of VSEPR theory. As indicated by the VSEPR hypothesis, the electrons repulse each other and will, consequently, take on a game plan that limits this repugnance. When the electron pairs or groups of electron pairs are as far apart as possible, repulsions are at their lowest.

To know more about molecule's visit :-

https://brainly.com/question/30465503

#SPJ1

If the container is built to shatter at pressures over 3.5 atm, the container will remain intact.

At constant temperature, when four grams of hydrogen gas is added to a 12.0 g sample of nitrogen gas in a fixed volume container with an initial pressure of 1.00 atm, we can determine if the container will remain intact using the formula for partial pressures:

P_total = P1 + P2

First, we need to find the moles of each gas. Hydrogen has a molar mass of 2 g/mol, and nitrogen has a molar mass of 28 g/mol.

Moles of H₂ = 4 g / 2 g/mol = 2 mol
Moles of N₂ = 12 g / 28 g/mol = 0.429 mol

Now we can find the mole fractions of each gas:

Mole fraction of H₂ = 2 mol / (2 mol + 0.429 mol) = 0.823
Mole fraction of N₂ = 0.429 mol / (2 mol + 0.429 mol) = 0.177

Next, we can find the partial pressures:

P_H₂  = Mole fraction of H₂ * Initial pressure = 0.823 * 1.00 atm = 0.823 atm
P_N₂ = Mole fraction of N₂ * Initial pressure = 0.177 * 1.00 atm = 0.177 atm

Finally, we find the total pressure:

P_total = P_H₂ + P_N₂ = 0.823 atm + 0.177 atm = 1.00 atm

Since the total pressure is 1.00 atm, which is below the container's shatter limit of 3.5 atm, the container will remain intact.

Learn more about pressure at https://brainly.com/question/28012687

#SPJ11

Answer:

E. the procedure

Explanation:

In scientific experiments, several steps are taken in order to achieve a significant result. However, the steps involved when performing the experiment should be taken note of and written down in a very comprehensible manner. The written step by step process involved in an experiment is called the PROCEDURE.

A procedure should be a guide to performing the experiment by a new experimenter. It should include everything done during the experiment. In this case, Mrs. Integer is telling Mrs. Apex to write down all she is doing during the experiment in a step by step manner. In essence, the principal is simply asking her to write a PROCEDURE.

Answer:

D. Stock Solution

Explanation:

A concentrated solution of a common reagent that can be diluted and used in reactions is called a Stock Solution.

Considering the definition of stock solution, a concentrated solution of a common reagent that can be diluted and used in reactions is called stock solution.

A stock solution is a highly concentrated solution. Stock solutions are very useful because they allow a portion to be diluted to obtain the desired concentration.

That is, the mother solution is at a higher concentration than the one used, and from this a dilution is made to prepare the solution at the desired concentration of use.

A stock solution is a large volume of chemical reagent. It has a standardized concentration, this is, it has a precisely known concentration.

A concentrated solution of a common reagent that can be diluted and used in reactions is called stock solution.

Learn more about stock solution:

https://brainly.com/question/14761983

https://brainly.com/question/24697661

https://brainly.com/question/23556100

https://brainly.com/question/15091874

Answer:

B

Explanation:

Because B is stable square both sides are equal

In the response, the correct options are:

Deoxyribonucleic acid (DNA) can be defined as a polymer composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses.

Although DNA is exceptionally long and therefore may seem impossible to fit in nucleus, it is contained in very a condensed and folded form. This form is called the DNA complex, chromatin. When paired with other genetic material such as histone proteins, this leads to creation of chromosomes.

The DNA stores instructions for making other large molecules, called proteins. These instructions are stored inside each of your cells, distributed among 46 long structures called chromosomes. The chromosomes is built up of thousands of shorter segments of DNA, called gene

Learn more about DNA at: https://brainly.com/question/16099437

#SPJ1

Answer:

In the response, the correct options are:

DNA is twisted in a double helix.

DNA is wrapped around proteins.

DNA is condensed into chromosomes are all correct.

Mass of KNO₃ : = 40.643 g

Given

28.5 g of K₃PO₄

Required

Mass of KNO₃

Solution

Reaction(Balanced equation) :

2K₃PO₄ + 3 Ca(NO₃)₂ = Ca₃(PO₄)₂ + 6 KNO₃

mol K₃PO₄(MW=212,27 g/mol) :

= mass : MW

= 28.5 : 212,27 g/mol

= 0.134

Mol ratio of K₃PO₄ : KNO₃ = 2 : 6, so mol KNO₃ :

= 6/2 x mol K₃PO₄

= 6/2 x 0.134

= 0.402

Mass of KNO₃ :

= mol x MW KNO₃

= 0.402 x 101,1032 g/mol

= 40.643 g

Answer:

Heat transfer in the atmosphere from the equatorial regions to higher latitudes occurs through the process of Convection

Explanation:

The equatorial regions of the earth's surface receive the most heat from the sun than any other region of the earth. This is because the are most directly in line with the direct heat from the sun.

Due to this heat from the sun, atmospheric air around the equatorial regions are hot and less dense than air in regions of higher latitudes, and thus, rises above the equator. The rising air at the equator is replaced by colder and denser air from higher latitudes north and south of the equator. As the rising air of the equatorial regions are being replaced by colder and denser air from higher latitudes, the hot and humid air moves away from the equator, toward regions of higher latitude, north and south thereby setting up a convection current of heat flow.

The compound most soluble in hexane (C6H14) is CH3CH2CH2CH2OH. The correct answer is option d.

Hexane is a nonpolar solvent, which means it dissolves nonpolar or slightly polar substances well. Solubility in hexane can be predicted based on the "like dissolves like" principle, where nonpolar solvents dissolve nonpolar solutes and polar solvents dissolve polar solutes.

Comparing the given options:

a. CH3OH (methanol) - Polar due to the presence of an -OH group.
b. CH3CH2CH2OH (propanol) - Moderately polar, with a longer hydrocarbon chain but still containing an -OH group.
c. CH3CH2OH (ethanol) - Polar, with a smaller hydrocarbon chain and an -OH group.
d. CH3CH2CH2CH2OH (butanol) - Slightly polar, with a longer hydrocarbon chain, reducing the overall polarity of the molecule.
e. CH3CH2CH2CH2CH2OH (pentanol) - Slightly polar, similar to butanol but with an even longer hydrocarbon chain.

Option (d) butanol has the lowest polarity among the choices and the longest hydrocarbon chain, making it the most soluble in hexane, a nonpolar solvent. The longer hydrocarbon chain reduces the overall polarity, allowing it to better interact and dissolve in nonpolar solvents like hexane. So, option d is correct.

For more such questions on Solubility, click on:

https://brainly.com/question/24057916

#SPJ11

Answer:

Nervous System

Explanation:

They work together

Answer:

39.02 amu

Explanation:

The average atomic mass of an element can be calculated as follows :

\(X=\dfrac{9.67\times 38+78.68\times 39+11.34\times 40+0.31\times 41}{100}\\\\X=\dfrac{3902.29}{100}\\\\X=39.02\ amu\)

So, the atomic mass of the element X is 39.02 amu.

Answer:

Formula for density:

D = Mass / Volume

Mass = 5.03g

Volume = 3.24ml

Formula in our case:

D = 5.03 / 3.24

D = 0.31 g/m3

Hope this helped you :D

Answer:

(o) Al + NaOH + H2O -NaAlO2 + H2.

When aluminum oxide Al 2 O 3 reacts with sodium hydroxide solution, it forms sodium aluminate and water H 2 O . This reaction takes place at a temperature of 900 - 1100 ° C

The half-life of the radioactive element is approximately 3.32 years.

The concept of half-life refers to the time it takes for half of the radioactive substance to decay. In this case, since the element loses 20% of its mass per year, we can calculate the half-life using the exponential decay formula.

If the substance loses 20% of its mass per year, it means that the remaining mass after each year is 80% (100% - 20%) of the previous year's mass. This can be expressed as a fraction: 0.8.

To find the number of years it takes for the mass to reduce to half, we can set up the following equation:

(0.8)^(number of years) = 0.5

Taking the logarithm of both sides, we have:

log(0.8) * (number of years) = log(0.5)

Solving for the number of years:

(number of years) = log(0.5) / log(0.8) ≈ 3.32 years

Therefore, the half-life of this radioactive element is approximately 3.32 years.

You can learn more about radioactive element at

https://brainly.com/question/23759636

#SPJ11

The model in use helps in providing aid in fields that the plant needs to survive, hence it proves to be a crucial step in the growth of the plant.

Mushrooms from fungal mycelial networks in the dirt  decompose organic matter and convert them into nutrients. Growing trees, and other plants, can then take these nutrients via their roots. This process is called decomposition.

In this process, matter from the environment (in the form of CO2 and H2O) is obtained  and rearranged into organic molecules (sugars). These organic molecules can impluse the producers’ life processes via cellular respiration (which releases CO2 and heat), or they can be saved as biomass.

The process of photosynthesis is also involved in the creation of usable energy. In the light-dependent reactions, which take place at the thylakoid membrane, chlorophyll absorbs energy from sunlight and then converts it into chemical energy with the use of water.

To learn more about photosynthesis,
https://brainly.com/question/19160081
#SPJ4

Answer:

The DNA code for building proteins is contained in the sequence of nucleotides in the DNA molecule. The four nucleotides in DNA are adenine (A), cytosine (C), guanine (G), and thymine (T). The sequence of these nucleotides is what determines the sequence of amino acids in a protein.

The DNA code is read in groups of three nucleotides, called codons. Each codon codes for a specific amino acid. There are 64 possible codons, but only 20 amino acids. This means that some amino acids are coded for by more than one codon.

The process of reading the DNA code and using it to build proteins is called protein synthesis. Protein synthesis takes place in two steps: transcription and translation.

Transcription is the process of copying the DNA code into a molecule of messenger RNA (mRNA). The mRNA then carries the DNA code out of the nucleus of the cell to the cytoplasm.

Translation is the process of using the mRNA code to build a protein. The mRNA code is read by a ribosome, which assembles the amino acids into a protein chain.

The DNA code is essential for life. It is the blueprint for all of the proteins that our cells need to function. Without the DNA code, we would not be able to grow, develop, or reproduce.

Explanation:

Answer: 823200 J

Explanation:

The total mass of sodium chloride is 58.44 g/mol.

The mass of sodium is 22.99 g/mol.

To find the percent sodium in sodium chloride can be found by dividing the amounts.

Therefore, the percent sodium is 39%.

ebsite uses cookies to ensure you get the best experience on our website. Learn more

Got it!

Doing your Assignments

Doing your Assignments

Sign in

How it works

Examples

Reviews

Homework Answers

Blog

Contact us

Submit

95 982

Assignments Done

98.8%

Successfully Done

In February 2021

Physics help

Math help

Programming help

Answer to Question #96220 in Molecular Physics | Thermodynamics for Kaleesh

Answers>Physics>Molecular Physics | Thermodynamics

Question #96220

a) Determine the enthalpy changes, ΔH for the reaction below, given the following reactions and subsequent ΔH values. Please rewrite the amended chemical reaction equation again.

N2H4 (l) + CH4O (l) CH2O (g) + N2 (g) + 3H2 (g)

2NH3 (g) N2H4 (l) + H2 (g) ΔH = 22.5kJ

2NH3 (g) N2 (g) + 3H2 (g) ΔH = 57.5 kJ

CH2O (g) + H2 (g) CH4O (l) ΔH = 81.2 kJ

b) Given that the enthalpy of vaporization for water as below:

H2O (l) H2O (g) ΔH vap = 44.0 kJ mol-1

Calculate enthalpy ΔH for each of the following processes:

i) Evaporating 3.00 moles of water

ii) Evaporating 3.00 grams of water

i) Condensing 20.0 grams of water

(3 Marks)

c) Use the enthalpy of formation data to calculate the enthalpy of the reaction below.

2C2H6 (g) + 7O2 6H2O (g) + 4CO2 (g)

Answer:

For 1: 6.68 g of nitrogen dioxide will contain \(8.73\times 10^{22}\) number of molecules

For 2: The given amount of nitrogen dioxide molecules has a mass of 41.31 g.

Explanation:

According to the mole concept:

1 mole of a compound contains \(6.022\times 10^{23}\) number of molecules

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\) ......(1)

We are given:

Mass of nitrogen dioxide = 6.68 g

Molar mass of nitrogen dioxide = 46 g/mol

Putting values in equation 1, we get:

\(\text{Moles of nitrogen dioxide}=\frac{6.68g}{46g/mol}=0.145mol\)

Using above concept:

If 1 mole of a compound contains \(6.022\times 10^{23}\) number of molecules

So, 0.145 moles of nitrogen dioxide will contain = \((0.145\times 6.022\times 10^{23})=8.73\times 10^{22}\) number of molecules

Hence, 6.68 g of nitrogen dioxide will contain \(8.73\times 10^{22}\) number of molecules

We are given:

Molecules of nitrogen dioxide = \(5.41\times 10^{22}\) molecules

Using the above concept:

If \(6.022\times 10^{23}\) number of molecules are present in 1 mole of a compound

So, \(5.41\times 10^{22}\) number of molecules will be present in = \(\frac{1mol}{6.022\times 10^{23}}\times 5.41\times 10^{22}=0.898\) moles of nitrogen dioxide

We know, molar mass of nitrogen dioxide = 46 g/mol

Using equation 1:

\(0.898mol=\frac{\text{Mass of nitrogen dioxide}}{46g/mol}\\\\\text{Mass of nitrogen dioxide}=0.898mol\times 46g/mol=41.31g\)

Hence, the given amount of nitrogen dioxide molecules has a mass of 41.31 g.

The prepare a 0.120 M aqueous solution of silver fluoride (Gf) using a 300 mL volumetric flask, follow these steps Calculate the number of moles of silver fluoride needed Molarity M = moles of solute / volume of solution in liters
Rearrange the equation.

The find the moles of solute moles of solute = Molarity (M) × volume of solution in liters moles of Gf = 0.120 M × 0.300 L = 0.036 moles Calculate the mass of silver fluoride required Mass (g) = moles × molar mass of Gf The molar mass of Gf = 108 g/mol (Ag) + 19 g/mol (F) = 127 g/mol Mass of Gf = 0.036 moles × 127 g/mol = 4.572 g Measure 4.572 grams of solid silver fluoride using a balance and add it to the 300 mL volumetric flask. Fill the volumetric flask with distilled water until it reaches the 300 mL mark and mix well to ensure the silver fluoride is completely dissolved. You have now prepared a 0.120 M aqueous solution of silver fluoride using a 300 mL volumetric flask by adding 4.572 grams of solid silver fluoride.

learn more about silver fluoride here.

https://brainly.com/question/30362231

#SPJ11

• Before the balloon was placed inside the hot water, the pressure was the same inside and outside the balloon. The hot water raised the kinetic energy of the air molecules inside the balloon, expanding the balloon, through thermal expansion.

• (1) the pressure of air inside the balloon increased, (2) the volume of the inside of the balloon increased as well, and (3) the temperature of the balloon increased. Note that pressure and volume are inversely proportional, and pressure and temperature are directly proportional. Therefore as the temperature increases, the pressure inside will increase, causing an increase in the volume. At a certain point though the volume will increase too much as to cause a significant decrease in pressure.

• The air molecules will gain kinetic energy, hence (1) increasing the molecules's speed, and (2) heating the air molecules.

Answer:

We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.--That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed, --That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness. Prudence, indeed, will dictate that Governments long established should not be changed for light and transient causes; and accordingly all experience hath shewn, that mankind are more disposed to suffer, while evils are sufferable, than to right themselves by abolishing the forms to which they are accustomed. But when a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, it is their right, it is their duty, to throw off such Government, and to provide new Guards for their future security.--Such has been the patient sufferance of these Colonies; and such is now the necessity which constrains them to alter their former Systems of Government. The history of the present King of Great Britain is a history of repeated injuries and usurpations, all having in direct object the establishment of an absolute Tyranny over these States. To prove this, let Facts be submitted to a candid world.

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, periodic table is the best platform to understand element.

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.

Periodic table is the best platform to have a look to all elements at once that are arranged in columns and groups mentioning their valences, electronegativity and Ionisation energy symbols.

Therefore, periodic table is the best platform to understand element.

Learn more about periodic table, here:

https://brainly.com/question/11155928

#SPJ2

The expected absorbance of a standard solution made by dissolving 0.0070 mol of NiCl2 · 6H2O in water to make 100 ml of solution is 0.227.

Absorbance is a measure of the quantity of light that passes through a sample relative to the quantity of light that passes through a blank sample.

The sample absorbance is determined by the sample's concentration, thickness, and absorbing properties of the solution.

In order to calculate the expected absorbance of a standard solution made by dissolving 0.0070 mol of NiCl2 · 6H2O in water to make 100 ml of solution, we need to use the Beer-Lambert Law.

It states that the absorbance of a solution is directly proportional to the concentration of the solution and the length of the path that the light has to travel through the solution.

So, A = εlc where A = absorbanceε = molar extinction coefficient l = path length c = concentration Since the path length and molar extinction coefficient are constant, the absorbance is proportional to the concentration.

So, A1/A2 = C1/C2

Where, A1 = absorbance of the standard solutionC1 = concentration of the standard solution

A2 = absorbance of the unknown solutionC2 = concentration of the unknown solution Rearranging the formula we get, C2 = C1(A2/A1)

Given that the concentration of the standard solution is 0.0070 mol/L and the path length is 1 cm.

The molar extinction coefficient for NiCl2·6H2O is 4.76 × 10^3 L/mol·cm. Substituting these values in the formula we get, C2 = 0.0070 mol/L × (0.380/1.660) = 0.0016 mol/L

Again, using the Beer-Lambert law we can find the expected absorbance of the unknown solution, where A = εlc.A = 4.76 × 10^3 L/mol·cm × 1 cm × 0.0016 mol/L = 7.62.

The expected absorbance of a standard solution made by dissolving 0.0070 mol of NiCl2 · 6H2O in water to make 100 ml of solution is 0.227.

To know more about Standard solution refer here:

https://brainly.com/question/18720754#

#SPJ11

Using the given partial derivatives at (2,1), the estimated temperature at (2.03, 0.96) is approximately 139.5°C based on first-order approximation.

To estimate the temperature at the point (2.03, 0.96), we can use a first-order approximation based on the given information. The first step is to use the partial derivatives of temperature, T_x and T_y, at the point (2,1). These derivatives provide the rate of change of temperature with respect to the x and y coordinates.

Given T_x(2,1) = 16 and T_y(2,1) = -15, we can use these values to estimate the change in temperature for small changes in x and y around the point (2,1). Since we want to estimate the temperature at (2.03, 0.96), which is a small change from (2,1), we can approximate the change in temperature as follows:

ΔT = T_x(2,1) * Δx + T_y(2,1) * Δy

Here, Δx = 2.03 - 2 = 0.03 and Δy = 0.96 - 1 = -0.04 (as we are subtracting the coordinates of (2,1) from (2.03, 0.96)).

Substituting the values, we have:

ΔT = 16 * 0.03 + (-15) * (-0.04)

   = 0.48 + 0.6

   = 1.08

Since T(2,1) = 140, we can estimate T(2.03, 0.96) by adding the change in temperature to the initial temperature:

T(2.03, 0.96) ≈ 140 + 1.08

                   = 141.08

Rounding this to the nearest tenth, the estimated temperature at (2.03, 0.96) is approximately 139.5°C.

Learn more about estimated temperature

brainly.com/question/26251133

#SPJ11

The volume of 0.205 M KOH solution required to neutralize 55 mL of 0.120 M H₂SO₄ is 22.5 mL.

The volume of 0.205 M KOH solution required to neutralize 55 mL of 0.120 M H₂SO₄, we can use the balanced chemical equation for the reaction between H₂SO₄ and KOH.

The stoichiometry of the reaction shows that 1 mole of H₂SO₄ reacts with 2 moles of KOH to produce 1 mole of K₂SO₄ and 2 moles of H₂O. Using the molarity and volume of H₂SO₄ given, we can calculate the number of moles of H₂SO₄ in the sample. From there, we can use the stoichiometry of the reaction to determine the number of moles of KOH needed to neutralize the H₂SO₄.

we can use the molarity of the KOH solution and the number of moles of KOH needed to calculate the volume of KOH solution required. In this case, the volume of 0.205 M KOH solution required to neutralize 55 mL of 0.120 M H₂SO₄ is 22.5 mL.

Learn more about Volume

brainly.com/question/24086520

#SPJ11