What is the form of the Pythagorean triple generator?
A. (x?+y?j* = (?-y? j* -(2xy)"
O B. (x2+y?(x2 - y?j* +(2xy)?
O C. (x2 - y2)* (*? +y?y* - (2xy)?
O D. (x2 + y2)%= (+?]+(203)

The composition of the mixture by volume 62.1% He and 37.9% Ar.

PV = nRT

n = mass / mw

substitute and rearrange...

PV = (mass / mw) RT

mw = (mass / V) RT/P

and since density = mass / V

mw = (0.660g /L) x (0.08206 Latm/moleK) x (298K) / (755mmHg x 1atm/760mmHg)

mw = 17.61 g/mole

mole fraction He x molar mass He + mole fraction Ar x molar mass Ar = 17.61

and if we let χHe = mole fraction He.. then (1-χHe) = mole fraction Ar.. ie.

χHe x 4.003 + (1-χHe) x 39.95 = 17.61

-35.95 χHe = - 22.34

χHe = 0.621

χAr = 1-0.621 = 0.379

now.. what about volume well... if both gases are ideal, then PV= nRT ---> V/n = RT/P.. so at the constant T and P.. V/n = a constant.. ie.. V1/n1 = V2/n2.. ie.. V1/V2 = n1/n2..meaning this...

"volume ratio = mole ratio"

so. VHe / VAr = m0les H2 / m0les Ar.

and since mole fraction He = moles He / moles total and mole fraction Ar = moles Ar / moles total...

therefore..

mole fraction He / mole fraction Ar = [moles He / (moles total)] / [ moles Ar / (moles total)] = nHe / nAr

VHe / VAr = χHe / χAr = 0.621 / 0.379...

or if you prefer...

62.1% He and 37.9% Ar

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STP signifies standard temperature and pressure. These conditions are at 1 atmospheric pressure and 0 degrees Celsus, It has been said that at these conditions, one mole of a gas molecule is  22.4 liters of volume.

1.50 mol Cl2( 22.4 L / mol) = 33.6 L Cl2

Answer:

1mpm(1 meters per minute) Explanation: Speed:Distance/time 25/25=1 plz mark as brainliest

Answer:

1mpm(1 meters per minute)

Explanation:

The main difference in boiling points are due to intermolecular attractions. With water, it is a polar molecule, has hydrogen bonding, and exhibits london forces. All of these combined, make H2O bonds very strong, which means more energy is required to transition from one state to another, leading to higher boiling points.

On the other hand, methane is a non-polar molecule that only exhibits very weak london forces. It being a non-polar molecule, means its bonds are very weak, which means less energy is required to boil methane.

Also, the Celsius system was made so that water would be a reference. This is a reason for why its boiling point temperature is convenient

Answer:

they have different wavelengths

The number-weighted average molecular weight of this polymer sample is 2,000 g/mol.

To calculate the number-weighted average molecular weight of a polymer, you need to divide the total molecular weight of the sample by the number of polymer molecules.

Number-weighted average molecular weight (Mn) = Total molecular weight / Number of polymer molecules

In this case, the total molecular weight of the polymer sample is 2,000,000 g/mol, and there are 1,000 polymer molecules.

Mn = 2,000,000 g/mol / 1,000 molecules

Mn = 2,000 g/mol

Therefore, the number-weighted average molecular weight of this polymer sample is 2,000 g/mol.

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Answer:

c physical

Explanation:

Answer:

the red line

Explanation:

[Cu2+] in the oxidation half cell that means at anode is 0.010M.This is calculated using Nernst equation.

The concentration cell in which concentration of copper ion at anode (oxidation half cell) is unknown while the concentration of copper ion at cathode (reduction half cell) is 2.0 M

For the given concentration cell, the Nernst equation is given as,

Ecell = -(0.05916 V / n) * log([Cu2+]anode / [Cu2+]cathode)

where, Ecell = cell potential = 0.068 V

            n = number of electrons transferred = 2

[Cu2+]anode = concentration of copper ion at anode

[Cu2+]cathode = concentration of copper ion at cathode = 2.0 M

Substituting the values,

0.068 V = -(0.05916 V / 2) * log([Cu2+]anode / 2.0 M)

log([Cu2+]anode / 2.0 M) = (0.068 V) * (2 / -0.05916 V)

log([Cu2+]anode / 2.0 M) = -2.3

[Cu2+]anode / 2.0 M = 10-2.3

[Cu2+]anode / 2.0 M = 5.0 x 10-3

[Cu2+]anode = (5.0 x 10-3) * (2.0 M)

[Cu2+]anode  = 0.010 M

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Answer:

The answer is

Explanation:

The percentage error of the density can be found by using the formula

\(Percentage \: \: error(\%) = \frac{error}{actual \: \: number} \times 100 \\ \)

From the question

actual density = 1.59 g/cm³

error = 1.68 - 1.59 = 0.09

The percentage error is

\(P(\%) = \frac{0.09}{1.59} \times 100\% \\ = 5.66037735...\)

We have the final answer as

Hope this helps you

Answer:

The stomach.

Explanation:

The vacuole is like the stomach because it stores food and water for later use. This allows the body and or cell to get energy when needed.

One silicon atom is present in each SiH4 molecule. SiH4 therefore has three silicon atoms per molecule.

One mole of any substance will contain 6.022 x 1023 atoms, which is known as Avogadro's number. One mole of any substance is equal to the atomic mass of that substance.

An inorganic substance having the chemical formula SiH 4 is silane. It is an odorless, pyrophoric, poisonous gas that resembles acetic acid in terms of taste and smell. Being a precursor to elemental silicon, silane is useful.

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The vapour pressure of mercury at 340.5°C in atm is 1.06 x 10^(-13)  atm

The normal boiling point of mercury is 356.7 °C.

Given that, the ∆Hvap of mercury = 58.51 kJ/mol

We know that at boiling point, the vapour pressure of the substance is 1 atm and with the increase in temperature, the vapour pressure of the substance also increases. We can use Clausius-Clapeyron Equation to calculate the vapour pressure of mercury at 340.5°C.

Clausius-Clapeyron equation is given by :

log(P2/P1) = - ∆Hvap/R [1/T2 - 1/T1]

Where, P1 = vapour pressure at boiling point of mercury = 1 atm

T1 = boiling point of mercury = 356.7 °C = 629.85 K

T2 = 340.5 °C = 613.65 K

∆Hvap = 58.51 kJ/mol

R = gas constant = 0.0821 L atm/mol K

On substituting the values,

log(P2/1) = - 58510/(0.0821 ) x [1/613.65 - 1/629.85]

log(P2) = 29.87

(P2) =1.06 x 10^(-13)  atm

Thus, the vapour pressure of mercury at 340.5 °C is 1.06 x 10^(-13)  atm(approx).

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Answer:

A bee sting has a ph of 5, and is therefore an acid. Litmus paper goes red (or stays red) in acidic solutions.

Answer:

The Blue Litmus Paper should turn red

Explanation:

Bee venom has a pH of 5.5, which means it is mildly acidic which in turn should make the Litmus paper turn Red. Hope this helps!

Answer:

2.69g

Explanation:

The molar masses of

Cu = 63.5

Cl = 35.5

So the molar mass of \(CuCl_{2}\) is 63.5 + (35.5 x 2) = 134.5

134.5 x 0.02 = 2.69g

Answer:

The answer is: Species A is more primitive than species B.

Explanation:

Species A has worse genetics than all the other fishes.

The molar concentration of Al(OH)₃ in the solution is 1.61 M.

we need to calculate the number of moles of Al(OH)3 in the solution:

Number of moles of Al(OH)₃ = mass of Al(OH)3 / molar mass of Al(OH)3

Molar mass of Al(OH)₃ = (1 x atomic mass of Al) + (3 x atomic mass of O) + (3 x atomic mass of H)

Molar mass of Al(OH)₃ = (1 x 26.98 g/mol) + (3 x 16.00 g/mol) + (3 x 1.01 g/mol) = 78.00 g/mol

Number of moles of Al(OH)₃ = 62.7 g / 78.00 g/mol = 0.804 moles

Next, we need to calculate the volume of the solution in liters:

Volume of solution = 500.0 mL = 500.0 mL x (1 L/1000 mL) = 0.500 L

Finally, we can calculate the molar concentration of Al(OH)₃

Molarity = moles of solute/volume of solution in liters

Molarity = 0.804 moles / 0.500 L = 1.61 M

Therefore, the molar concentration of Al(OH)₃ in the solution is 1.61 M.

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Answer:

absotutately right

Explanation:

What is the pH color scale?

The pH scale runs from 0 to 14, with each number assigned a different color. At the bottom of the scale sits red, which represents the most acidic, and a dark blue at its opposite end represents 14 and alkalinity. In the middle zone, the pH scale becomes neutral

The pH of the solution could be 10. The basic solution has a pH value of more than 7.

Litmus paper helps us qualitatively determine a substance as an acid or base. For any substance to be a base, blue litmus must remain blue.

The pH scale ranges from 0 to 14 and anything below 7.0 is acidic and anything above 7.0 is alkaline or basic.

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Radium have a lower ionization energy than Barium because electrons are closer to the nucleus

What is ionization energy?

Ionization energy can be simply stated as a measurement of an atom's or ion's inclination to give up an electron or of how challenging it is to remove an electron from them. An electron is often lost when a chemical species is in its ground state.

The atom displays a smaller radius than anticipated and the s electrons are more challenging to expel because these electrons are located nearer the nucleus. The first ionization enthalpy of Radium is higher than that of Barium.

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The name for SiO2 is silica.

What is SiO2?

SiO2 is the chemical formula for silicon dioxide.

Silica is the common name for silicon dioxide.

It is an oxide of silicon, and it has been known for thousands of years as a mineral named quartz.

The chemical compound's fundamental component is silicon and oxygen atoms.

SiO2 is one of the most abundant minerals on the planet and is found in a variety of forms, including sand, rocks, and quartz crystals.

For example, the silica content of sand is more than 80 percent.

Correct Option: Silica.

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defective greatest formerly knows sd ghost;

Homeostasis is the process by which a body is able to adapt to different conditions and keep the body in relatively stable internal conditions at all times.

During homeostasis, blood helps regulate the body temperature by eliminating excess heat, maintaining the pH balance of the body, and maintaining the internal osmotic pressure.

The immune system assists in homeostasis by screening and destroying pathogens and helps prevent autoimmunity as well as regulates immune reactions periodically. If the immune system fails to do these processes, then it may result in the appearance of cancer.

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Answer:

c

Explanation:

It is to be noted that there are no p orbitals accessible for multiple bonding in an sp3 hybrid. The two unhybridized p orbitals are accessible for multiple bonding in sp hybridization.

Bonds are formed using unhybridized p atomic orbitals. Two unhybridized p atomic orbitals from distinct atoms overlap side by side, resulting in a shared electron pair filling the area above and below the connecting line between the atoms (the internuclear axis).

An atom will contain the same amount of hybridized orbitals as electron density areas. There can be a total of four hybridized sp3 orbitals, thus take the number of regions of electron density and divide that by four to get the number of unhybridized p orbitals.

An atomic orbital is a function in atomic theory and quantum mechanics that describes the position and wave-like behavior of an electron in an atom. This formula may be used to determine the likelihood of locating any atom's electron in any given location surrounding the nucleus.

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One of the isomers of C4H10O that is an alcohol is the 1-butanol or butyl alcohol:

Another of the alcohols that has the given formula is tert-butanol or tert-butyl alcohol:

The third isomer of C4H10O is 2-butanol:

And the last isomer is isobutanol or isobutyl alcohol:

Answer:

C.) Bernie relied on malleability, Nicholas relied on ductility, and Matt relied on appearance.

Explanation:

I took the quiz on edge

Answer:

the answer is c the guy right

Explanation:

Answer:

H = 1+

O = 2-

O Has 8 protons weight 16g/mole

H has 1 proton weight 1g/mole

H - O - H

Oxygen is in group 6 which means it holds 6 valence electrons, leaving 2 for bonds.

A valence electron is an outer shell electron that can form a chemical bond if the outer shell is not closed.

Now when an atom bonds to another in a single bond, both atoms contribute one valence electron in order to form a shared pair.

In the picture O has 7 Valence electrons, so it would have a negative charge of 1.

The middle Hydrogen has 3 valence electrons which would make hydrogen have a charge of negative 1.

Should look like this

        ..                      ..

H .   .O.    .H   =   H-O-H

        ..                      ..

Answer:

d. Because those chemicals are easily made when CO2 reacts with water, forming H2CO3 (via carbonic anhydrase

The pairs of substances form a buffer system for human blood is carbonic acid (H₂CO₃) and bicarbonate anion (HCO₃⁻)  , Option D

A buffer is a  combination of a weak acid (or base) and a salt that contains the conjugate of that weak acid or base.

A buffer solution is added to maintain the pH of any solution

The buffer  of carbonic acid (H₂CO₃) and bicarbonate anion (HCO₃⁻)  is used to maintain the balance of acid and base in the body.

It is used to maintain the pH level of the body between 7.35 and 7.45 , as the pH level higher than 7.8 and lower than 6.8 can lead to death.

Therefore the pairs of substances form a buffer system for human blood is carbonic acid (H₂CO₃) and bicarbonate anion (HCO₃⁻)  , Option D

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