If a swimming pool and a glass of water have the same temperature then the water in the

Answer:c

Explanation:c

According to the given equation, 2C4H10 + 1302 — 8CO2 + 10H, 2 moles of O are required to react with 4.71 moles of C4H10.

The number of moles of a compound can be calculated stoichiometrically as follows:

The balanced chemical equation is given as follows:

2C4H10 + 1302 — 8CO2 + 10H

Based on the above equation, 2 moles of C4H10 reacts with 13 moles of O

Therefore; 4.71 moles of C4H10 will react with 4.71 × 6.5 = 30.62 moles of O

Learn more about stoichiometry at: https://brainly.com/question/11464844

Answer: 30.6

Explanation:

Approximately 631.5 liters of dry air at 25°C and 750 torr would need to be processed to produce 150 liters of liquid \(O_2\) -183°C.

To solve this problem, we need to consider the ideal gas law and the molar volume of gases.

First, we can calculate the number of moles of oxygen in 150 L of liquid \(O_2\) at -183°C. To do this, we divide the mass of liquid oxygen by its molar mass:

Mass of liquid oxygen = volume of liquid oxygen * density of liquid oxygen = 150 L * 1.14 g/mL = 171 g

Molar mass of oxygen (O2) = 32 g/mol

Number of moles of oxygen = mass of oxygen / molar mass of oxygen = 171 g / 32 g/mol ≈ 5.34 mol

Since the mole fraction of oxygen in dry air is given as 0.21, we can calculate the total moles of dry air needed to produce 5.34 mol of oxygen:

Moles of dry air = moles of oxygen / mole fraction of oxygen = 5.34 mol / 0.21 ≈ 25.43 mol

Now, we can use the ideal gas law to calculate the volume of dry air at 25°C and 750 torr (convert to atm) that corresponds to 25.43 mol:

PV = nRT

P = 750 torr * (1 atm / 760 torr) ≈ 0.987 atm

V = volume of dry air (unknown)

n = 25.43 mol

R = 0.0821 L·atm/(mol·K)

T = 25°C + 273.15 = 298.15 K

Solving for V:

V = nRT / P = (25.43 mol)(0.0821 L·atm/(mol·K))(298.15 K) / 0.987 atm ≈ 631.5 L

For more such questions on dry air visit:

https://brainly.com/question/14247097

#SPJ8

Answer:

Sodium oxide

Explanation:

Answer: Sodium oxide

Answer:

The answer is A.

Explanation:

Neutrons and protons are located in the dense middle of the atom called the nucleus, and electrons are located on the electron cloud located outside of the nucleus.

The number of atoms present in the FCC unit cell is 4. The Avogadro number is a constant and its value is 6.022 × 10²³.

The density of a crystalline substance with the molar mass 'M', unit cell edge length 'a', Molar mass 'M', the number of atoms present per unit cell 'Z' is given by the equation:

Density = ZM / a³N₀

The molar mass of silver = 107.86 g/mol

408.7pm = 408.7 × 10⁻¹² m

10.5g/cm³ = 10500 kg /m³

N₀  =  ZM / a³d

= 4 ×  107.86 / (408.7 × 10⁻¹²)³ × 10.5 × 10³

= 6.025 × 10⁻²⁴

Thus the Avogadro’s number is 6.025 × 10⁻²⁴.

To know more about Avogadro’s number, visit;

https://brainly.com/question/859564

#SPJ9

Explanation:

for example, one gene will code for the protein insulin, which is important role in helping your body to control the amount of sugar in your blood. Genes are the basic unit of genetics. Human beings have 20,000 to 25,000 genes.

8.253 is the pH of a 0.307 M solution of NaNO\(_2\). The ionization constant, a, for the acid, HNO\(_2\), is 4.60×10⁻⁴.

In chemistry, the pH scale is used to define the level of basicity or acidity of an aqueous. pH has historically stood for " Hydrogen potential" (or "power of hydrogen").

Lower pH values are recorded for acid solution (solutions with greater H ion concentrations) than for basic or alkaline solutions.

NO\(_2\)⁻ + H\(_2\)O → HNO\(_2\) + OH⁻

Kb = [HNO\(_2\) ][OH⁻]/[NO\(_2\)⁻]

Kb = 1.00X10⁻¹⁴

Kb = 1.00X10⁻¹⁴/ 4.60X10⁻⁴= 2.17X10⁻¹¹

[HNO\(_2\) ] = [OH⁻] = x

[NO\(_2\)⁻ ] = 0.148-x

Kb = 2.17X10⁻¹¹= x² / 0.148

x = [OH⁻] = 1.79X10⁻⁶

pOH = 5.747

pH = 14.000 - pOH = 8.253

Therefore, 8.253 is the pH of a 0.307 M solution of NaNO\(_2\). The ionization constant, a, for the acid, HNO\(_2\), is 4.60×10⁻⁴.

To know more about pH, here:

https://brainly.com/question/27945512

#SPJ1

1) List known values.

Width: 16.0 ft

Length: 20 ft

Rate of accumulation: 1350 snowflakes/(ft2 * min)

2) List unknown values

Accumulated snow per hour:

3) Accumulated snow (grams) in one square foot of lawn per minute

2.025 g is the snow accumulated in one square foot in one minute.

4) Accumulated snow in one square foot per hour

121.5 g is the snow accumulated in one square foot in one hour.

5) Calculate the area of the lawn

16.0 ft * 20.0 ft = 320 ft2

6) Accumulated snow on the whole lawn in one hour.

38880 g is the snow accumulated in one hour on the lawn.

7) Convert grams into kilograms

38.88kg is the amount of snow accumulated on the lawn in one hour.

If all the pumped water had remained in the cave system, approximately 71.43% of the cave would have been filled with water.

To calculate the percentage of the Thanksgiving Luang cave system that would have been filled with water if all the pumped water had remained, we need to find the ratio of the volume of water to the total volume of the cave system.Given that the cave system is estimated to be 35 million cubic meters large and 250 million liters of water were pumped out, we need to convert liters to cubic meters. Since 1 liter is equal to 0.001 cubic meters, the pumped water volume in cubic meters is 250 million multiplied by 0.001, which is 250,000 cubic meters.To find the percentage, we divide the volume of water (250,000 cubic meters) by the total volume of the cave system (35 million cubic meters) and multiply by 100.

Percentage = (Volume of water / Total volume of cave system) x 100

          = (250,000 / 35,000,000) x 100

          ≈ 0.7143 x 100

          ≈ 71.43%

for such more questions on water

https://brainly.com/question/19491767

#SPJ8

Answer:

\(\color {blue}\boxed{\colorbox{white} {✦Answer✦}}\)

D.

ionic bonding because one atom gains an electron and the other atom loses an electron

\(\color {blue}\boxed{\colorbox{white} {✦hope helps uh<3✦}}

\)

The attractive interactions between atoms and molecules lead to bonding. NaCl shows ionic bonding because an atom gains and other loses an electron. Thus, option D is correct.

The chemical bonds that include the electrostatic attraction and forces to form the linkage between the opposite charges are said to have ionic bonds.

The ionic bonds are characterized by the presence of differences in the electronegativities that allow the opposite charges to interact efficiently. The bonds are formed between negative and positive charges.

The NaCl molecule has ionic bonds as sodium has more electron that tends to donate electrons while the chlorine atoms have one less valence electron that tends to gain an electron.

Therefore, in option D, the NaCl molecule shows ionic bonding as they have cations and anions.

Learn more about ionic bonds here:

https://brainly.com/question/977324

#SPJ2

Answer: the molarity of 0.650 mol of Na2 in 1.50 L of solution is 0.433 M.

Explanation: the molarity of 0.650 mol of Na2 in 1.50 L of solution is 0.433 M.

Answer:

i think niether

Explanation:

To give 33.6 dm³ hydrogen gas at STP, 18.06 x 10²³ atoms of Na must react completely.

A mole is a unit of measurement used to measure the amount of any fundamental entity (atoms, molecules, ions) present in the substance.

As according to the given equation, 2 moles (ie 12.04 x 10²³ atoms) of Na-atoms produces 1 mole (22.4 ltr) of H₂-gas.

Hence, to produce 33.6 ltr (equivalent to 33.6 dm³) of H₂-gas produced by ;

   = 12.04 x 10²³ atoms of Na / 22.4 ltr of H₂-gas x 33.6 ltr

   = 18.06 x 10²³ atoms of Na

Hence, To give 33.6 dm³ hydrogen gas at STP, 18.06 x 10²³ atoms of Na must react completely.

Learn more about Mole concept here ;

https://brainly.com/question/20483253

#SPJ1

Answer:

I think it's A and C. Please tell me if I am wrong.

Explanation:

Answer:

Alright so I did this quiz a while ago it's A and C now could i have brainliest?

Explanation:

This element is nonmetal and appears in the periodic table.

The number that represents the position of the elements is called, the atomic number, it also represents the number of protons = numbers of electrons an atom has.

Answer: D. the atomic number

Ideal gas law is valid only for ideal gas not for vanderwaal gas. To solve such, we need to know the relation between rate of effusion and molar mass of gases. Therefore, the new volume V₂ is 18L.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. an ideal gas on the walls of the container is inversely proportional to the volume occupied that gas.

Mathematically, Boyle's law can be written as

P₁V₁ = P₂V₂

P₁=initial pressure=342 torr

P₂=final pressure=1710 torr

V₁ = initial volume= 29.0 L

V₂=final pressure=?

Substituting all the given values in the above equation, we get

V₂ = P₁V₁/P₂

V₂ = (342 × 29.0)/1710

V₂ = 18L

Therefore, the new volume V₂ is  18L.

To learn more about ideal gas equation, here:

https://brainly.com/question/14826347

#SPJ1

The factor that  doesn’t change the resistance of a wire is pressure. option A.

Resistance is a conductor's capacity to thwart the passage of current. It is controlled by the interplay of the applied voltage and the electric current passing through it. The amount of opposition any object applies to the flow of electric current is referred to as resistance.

The ohm, a unit of measurement for resistance, is represented by the Greek letter omega. According to Ohm's law, the voltage across two places is precisely proportional to the current flowing through a conductor between them.

Hence option A is correct.

Learn more about resistance at

https://brainly.com/question/17563681

#SPJ1

missing part;

The pressure

The length of the resistor.

The thickness of the resistor.

The temperature of the conductor.

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.

Learn more about  nucleus from

https://brainly.com/question/9376695

#SPJ1

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.

a) To calculate the minimum frequency of electromagnetic radiation required to release electrons from the metal, you can use the following formula:

f = W / h

where f is the minimum frequency of electromagnetic radiation required, W is the work function of the metal in joules, and h is the Planck constant in joules per second.

Plugging in the values for W and h, you get:

f = (5.86 x 10^-19 J) / (6.626 x 10^-34 J/s) = 8.9 x 10^14 Hz

This is the minimum frequency of electromagnetic radiation required to release electrons from the magnesium metal.

b) To calculate the kinetic energy of the ejected electronic light of frequency 2.00 x 10^14 Hz, you can use the following formula:

KE = hf - W

where KE is the kinetic energy of the ejected electron, h is the Planck constant in joules per second, f is the frequency of the electromagnetic radiation in hertz, and W is the work function of the metal in joules.

Plugging in the values for h, f, and W, you get:

KE = (6.626 x 10^-34 J/s) * (2.00 x 10^14 Hz) - (5.86 x 10^-19 J) = 1.32 x 10^-19 J - 5.86 x 10^-19 J = -4.54 x 10^-20 J

This is the kinetic energy of the ejected electron when light of frequency 2.00 x 10^14 Hz is used to irradiate the magnesium metal. Since the kinetic energy is negative, this means that the electron is not released from the metal when irradiated with this frequency. The frequency of the electromagnetic radiation needs to be higher than the minimum frequency required to release the electron in order for the electron to be ejected from the metal.

Answer:

1.E25 it is the answer the answer to mass of 1×10^25 molecules of water​

Explanation:

this is just EXPLINATION find your answer using this

first divide the number of molecules by Avogadro's number 6.022*10^25

you will

l get no. of Moles of water

multiply the no. of Moles with mass of 1 Mole of water 18g per mole

if get answer you comment

you should try on your own you will understand better

The number of moles of NaCl dissolved in the water to make the given solution is 1 mole.

A mole can be described as a unit that is employed to calculate the count of particles. The particles which are counted are usually identical entities, individually distinct.

The amount of chemical substance can be measured in the terms of the mole and the number of entities in one mole is approximately equal to 6.023 × 10 ²³.

Given, the one liter of a 1 M solution of NaCl.

The concentration of the NaCl solution = 1 M

The molarity of the given solution, \(M = n/V\)

The number of moles of NaCl, n = M ×V = \(\displaystyle {1 mol L^{-1}}\times{1L}\) = 1 mol

Learn more about the mole, here:

brainly.com/question/26416088

#SPJ1

The normal boiling point of the unknown liquid is 57.4°C.

The normal boiling point occurs when the vapor pressure of the liquid is equal to the atmospheric pressure. At normal boiling point, the temperature of the liquid is called the boiling point.

Using the Clausius-Clapeyron equation:

ln(P₂/P₁) = -(ΔHvap/R) * (1/T₂ - 1/T₁)

where P₁ is the vapor pressure at the given temperature T₁, P₂ is the vapor pressure at the boiling point temperature T₂, ΔHvap is the heat of vaporization, R is the gas constant.

At -170°C, the vapor pressure of the liquid is given as P₁ = 117 torr. At normal boiling point, the vapor pressure of the liquid is P₂ = 760 torr.

Converting all units to SI units, we have:

P₁ = 15.47 Pa

P₂ = 101325 Pa

ΔHvap = 5480 J/mol

R = 8.314 J/(mol*K)

Plugging in the values, we get:

㏑(101325/15.47) = -(5480/8.314) * (1/T₂ - 1/103.15)

Solving for T₂, the boiling point is found to be:

T₂ = 57.4°C

As a result, the unknown liquid's usual boiling point is 57.4°C.

To know more about the Pressure, here

https://brainly.com/question/14748171

#SPJ1

Rock

Density Range Minerals React

(g/mL) with Acid?

granite 2.5-2.8

no

dolomite 2.8-2.9

yes

peridotite 3.1-3.4

no

limestone 2.3-2.7

yes

iron ore

4.5-5.3

no

Based on the information in the table and Nguyen's data, rock X is correctly identified as

rock Y is correctly identified as

and rock Z is correctly

The answers in the other two boxes are Dolomite, Granite, and Limestone

Answer:

She should expect for the scale to say 145 grams.

Explanation:

Limestone is mostly made up of the mineral calcium carbonate (CaCO3). But if you add an acid, you add hydrogen ions (H+), which will react with the carbonate to form hydrogen carbonate HCO3- ions, which are very soluble in water, and the limestone will dissolve. So, if you add 100+45 you get 145.

The ∆H of solution of NaOH is 46.8 kJ/mol.

First, we need to calculate the amount of heat absorbed by the solution:

q = m × c × ∆T

where q is the heat absorbed (in Joules), m is the mass of the solution (in grams), c is the specific heat capacity of the solution (in J/(g °C)), and ∆T is the change in temperature (in °C).

In this case, the mass of the solution is the sum of the mass of NaOH and the mass of water:

m = 7.59 g + 80.0 g = 87.59 g

The change in temperature is:

∆T = 48.0 °C - 25.0 °C = 23.0 °C

Substituting the values, we get:

q = 87.59 g × 4.184 J/(g °C) × 23.0 °C = 8,878 J

Next, we need to convert the heat absorbed into the enthalpy change of solution (∆H). The enthalpy change of solution is the heat absorbed per mole of solute. The number of moles of NaOH is:

n = m/M

where M is the molar mass of NaOH, which is 40.00 g/mol.

n = 7.59 g / 40.00 g/mol = 0.1898 mol

Therefore, the enthalpy change of solution is:

∆H = q/n = 8,878 J / 0.1898 mol = 46,780 J/mol = 46.78 kJ/mol

The H of a NaOH solution, rounded to three significant numbers, is 46.8 kJ/mol.

To know more about the Temperature, here

https://brainly.com/question/30411639

#SPJ1