A 7.50 L sample of gas collected in the upper atmosphere at a pressure of 18.3 torr is compressed into a 170.0 mL container at the same temperature. What is the new pressure?

Answer:

First Option: B)

Second Option: C)

The pictures below will show the answers. The first picture is the first option, and the second picture is the second option.

Answer:

Question 1 : B

Question 2: C

Explanation:

Hope this helps!

Edge 2022

Answer:

I don't have a paper right now so I am attaching images for b(i), (ii) and c(i)

Explanation:

c) Ionic bond is the result of strong electrostatic force of attraction between positively charged metal ion and negatively charged metal ion.

Answer:

Method: Measure out 25 cm3 of 0.5 mol dm3 lead(II)nitrate solution and add it to a small beaker. Measure out 25 cm3 of 0.5 mol dm3 of potassium sulfate add it to the beaker and mix together using a stirring rod.

Moles of Br- is mathematically given as

moles of Br-=28*10^{2}

Option A

The chemical reaction is

MgBr2 ----> Mg+2 + 2Br-

Let 940mL be present

Generally the equation for the Morarity  is mathematically given as

molarity = moles / volume (L)

Therefore

1.5 = moles / 940 x 10-3

moles = 1400

Hence, moles of MgBr2 is 1.0125

Therefore

moles of Br- = 2 x moles of MgBr2

moles of Br- = 2 x 1400

moles of Br-=28*10^{2}

Mor on Molecules

https://brainly.com/question/19922822

Answer:

C. Sodium Chloride.

Explanation:

Because when NaCl dissolved in water, it will dissociate to produce 2 ions Na+ and Cl-.

Answer:

2.03 atm

Explanation:

Number of moles of He = 1g/4g/mol = 0.25 moles

Number of moles of F2 = 14.0g/38 g/mol = 0.37 moles

Number of moles of Ar=19.0g/40g/mol = 0.48 moles

Total number of moles = 0.25 + 0.37 + 0.48 = 1.1 moles

From;

PV=nRT

P= pressure of the gas mixture

V= volume of the gas mixture

n= total number of moles of the gas mixture

R= gas constant

T= temperature of the gas mixture

P= nRT/V

P= 1.1 × 0.082 × 293/13

P= 2.03 atm

Answer:

A control variable

Explanation:

Answer:

Control variable

Explanation:

Answer:

80°F

Explanation:

Lukewarm means moderately warm. 80°C (176°F) water is extremely hot and could burn someone. 80°F (26 2/3°C) is moderately warm.

The source of hydrogen during the loss of the leaving group to form the free amine is water donates two protons during this phase of the reaction, option C.

Solar energy, or electromagnetic radiation, is produced in large quantities by the sun. Only a small portion of this energy, known as "visible light," is visible to humans. Waves may be used to explain and quantify how solar energy moves. The distance between two successive, comparable locations in a succession of waves, such as from crest to crest or trough to trough, is known as the wavelength and allows scientists to calculate the energy of a wave.

A certain range of wavelengths characterises each form of electromagnetic radiation. Less energy is carried when the wavelength is longer (or looks to be stretched out). The most energy is carried by short, tight waves. It might seem illogical at first, but picture a moving rope to help you understand. A person can move a rope in long, broad waves with little effort. One would have to use much more force to make a rope move in short, tight waves.

Learn more about Hydrogen:

https://brainly.com/question/30722024

#SPJ4

The aromatic ring acts as a nucleophile in the EAS (Electrophilic Aromatic Substitution) mechanism. This is because the aromatic ring contains a cloud of delocalized π electrons, which can be attracted to an electrophilic species.

When an electrophile attacks the aromatic ring, it forms a sigma bond with one of the carbon atoms, which disrupts the delocalized π electrons.

This leads to the formation of a carbocation intermediate, which is stabilized by resonance delocalization. The nucleophile (the aromatic ring) then attacks the carbocation intermediate, forming a new sigma bond between the electrophile and the aromatic ring.

The mechanism concludes with the loss of a proton from the newly formed sigma bond, regenerating the aromatic ring. Overall, the aromatic ring acts as a nucleophile in the EAS mechanism, allowing it to undergo electrophilic substitution reactions.

to learn more about  aromatic ring

https://brainly.com/question/28325919

#SPJ11

The percent error for each of these measurements a.5.4%  b.1.8%  c.0%

d.3.6% for copper is 896 g/ml.

It is the difference in between the experimental and the theoretical values for the experiment results and divided by theoretical value multiplied by  100.

The percent error, 5.5 - 5.2 × 100 = 5.4%  

                                5.5 - 5.1 × 100 = .1.8%

                                 5.5 - 5.5 × 100 =.0%

                                 5.5 -  5.7 × 100 =3.6%

Therefore,  percent error for each of these measurements a.5.4%  b.1.8%  c.0% d.3.6% for copper is 896 g/ml.

Learn more about percent error, here:

https://brainly.com/question/3670306

#SPJ1

Hey there !

Mass = 237 g

Volume 237 mL

Therefore:

Density = mass / Volume

D = 237 / 237

D = 1.0 g/mL

Hope this helps!

Answer:

Magnesium, strontium, and barium are a few of the elements

Explanation:

Answer:

ice melting

Ice melting can cause serious floods with the water levels rising

Answer: Some climate models find that warming increases precipitation variability, meaning there will be more periods of both extreme precipitation and drought. This creates the need for expanded water storage during drought years and increased risk of flooding and dam failure during periods of extreme precipitation.

The process by which a molecule of water dissociates to form both a hydrogen ion (H+) and a hydroxide ion (OH−) is called the self-ionization of water. Self-ionization occurs when pure water is involved.

It is often expressed as follows:

H2O(l)⇌H+(aq)+OH−(aq)The self-ionization of water means that a solution containing only water molecules will contain H+ ions and OH- ions that come from the self-ionization of the water molecule. In general, acid donates a hydrogen ion, whereas a base receives a hydrogen ion. Pure water can be considered both an acid and a base since it can either donate or receive a hydrogen ion. Because the self-ionization of water produces both H+ and OH- ions in equal amounts, pure water is considered a neutral substance.

When hydrogen ions are added to water, the pH drops, and the solution becomes acidic. On the other hand, when hydroxide ions are added to water, the pH increases, and the solution becomes alkaline or basic. The self-ionization of water allows for the measurement of pH, which is a logarithmic scale that measures the concentration of H+ ions in a solution.

To know more about  self-ionization refer to:

https://brainly.com/question/8974149

#SPJ11

Answer: The volume \((V_{1})\) of 1.00 mol of helium at 273 K is 22.4 L and the final volume \((V_{2})\) is 44.8 L.

Explanation:

Given: \(T_{1}\) = 273 K,   \(n_{1}\) = 1.00 mol

\(T_{2}\) = 273 K,         \(n_{2}\) = 2.00 mol

At the standard pressure, 1 atm the value of \(V_{1}\) and \(V_{2}\) is calculated as follows.

\(V_{1} = \frac{n_{1}RT_{1}}{P}\\= \frac{1.00 mol \times 0.0821 Latm/mol K \times 273 K}{1 atm}\\= 22.4 L\)

Similarly,

\(V_{1} = \frac{n_{2}RT_{2}}{P}\\= \frac{2.00 mol \times 0.0821 Latm/mol K \times 273 K}{1 atm}\\= 44.8 L\)

Thus, we can conclude that the volume \((V_{1})\) of 1.00 mol of helium at 273 K is 22.4 L and the final volume \((V_{2})\) is 44.8 L.

Answer: The liquid oxygen machine is producing less liquid oxygen than normal because there's a low attraction between the molecules.

It should be noted that oxygen in its liquid state will take up less space. It can also be stored at a lower pressure than when it's in its gaseous state.

Explanation:

From the complete question, the liquid oxygen evaporates at a slightly higher The reason for this is due to the fact that they have similarly low attraction between molecules.

Answer:

An initial velocity that is faster than a final velocity

Explanation:

The relationship between velocity and acceleration is given as follow;

Acceleration = Change in velocity / Time

Change in Velocity = Final Velocity - Initial Velocity

From the formular, time is not able to affect the sign of the acceleration.

A negative acceleration is also referred to as deceleration and this occurs when there is a drop in velocity.

A drop in velocity occurs when the initial velocity is faster than the final velocity.

The primary difference between measuring with a graduated cylinder and a volumetric pipette lies in their accuracy, precision, and purpose.

A graduated cylinder is a cylindrical glassware marked with evenly spaced graduation lines, which allow for the measurement of various volumes of liquid. Graduated cylinders are commonly used in laboratories for obtaining a relatively accurate measurement of liquid volumes.

On the other hand, a volumetric pipette is a slender, elongated glassware with a single graduation mark, designed to precisely measure and transfer a specific volume of liquid. Volumetric pipettes are utilized when a high degree of accuracy and precision is required, such as in analytical chemistry and quantitative analysis.

While both instruments measure liquid volume, graduated cylinders offer a broader range of measurements, making them more versatile. However, volumetric pipettes provide a higher degree of accuracy and precision due to their specific calibration. Consequently, the choice between using a graduated cylinder or a volumetric pipette depends on the degree of precision needed for a particular experiment or task.

In summary, graduated cylinders are suitable for general liquid volume measurements with moderate accuracy, while volumetric pipettes cater to precise measurements requiring a higher level of accuracy and consistency.

To know more about graduated cylinder, refer to the link below:

https://brainly.com/question/28246821#

#SPJ11

The pH of the sol-gel solution plays a crucial role in determining the size and shape of the silica nanoparticles produced during the freeze drying assisted sol-gel process.

The pH of the solution used in the freeze drying assisted sol-gel process can have an influence on the spherical shape and particle size of silica nanoparticles (SNPs). When the pH is adjusted, it affects the hydrolysis and condensation reactions that occur during the sol-gel process. This, in turn, can impact the formation and growth of the silica nanoparticles.

In general, at higher pH values, the hydrolysis reaction is favored, leading to the formation of larger silica particles. On the other hand, at lower pH values, the condensation reaction is favored, resulting in the formation of smaller particles.

Furthermore, the pH also influences the surface charge of the SNPs, which can affect their stability and aggregation behavior. At specific pH values, the surface charge can be neutralized, leading to particle aggregation.

Overall, the pH of the sol-gel solution plays a crucial role in determining the size and shape of the silica nanoparticles produced during the freeze drying assisted sol-gel process.

To know more about solution visit-

https://brainly.com/question/1616939

#SPJ11

In 0.75 moles of caffeine, there are a total of 6 carbon atoms, 7.5 hydrogen atoms, 3 nitrogen atoms, and 1.5 oxygen atoms.

To determine the total number of atoms in 0.75 moles of caffeine, we need to consider the molecular formula of caffeine, which is C8H10N4O2. The molecular formula provides the ratios of each element present in the compound. By multiplying the number of atoms in each element by the corresponding coefficient in the molecular formula, we can calculate the total number of atoms. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms in each molecule of caffeine. Multiplying these values by 0.75 moles will give us the total number of atoms in 0.75 moles of caffeine.

The molecular formula of caffeine, C8H10N4O2, provides the number of atoms for each element present in one molecule of caffeine. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms.

To calculate the total number of atoms in 0.75 moles of caffeine, we need to multiply the number of atoms for each element by the coefficient in the molecular formula, and then multiply that by the number of moles (0.75 moles).

For carbon (C): 8 atoms x 0.75 moles = 6 atoms (since there are 8 carbon atoms in one molecule of caffeine).

For hydrogen (H): 10 atoms x 0.75 moles = 7.5 atoms (since there are 10 hydrogen atoms in one molecule of caffeine).

For nitrogen (N): 4 atoms x 0.75 moles = 3 atoms (since there are 4 nitrogen atoms in one molecule of caffeine).

For oxygen (O): 2 atoms x 0.75 moles = 1.5 atoms (since there are 2 oxygen atoms in one molecule of caffeine).

To learn more about molecular click here:

brainly.com/question/156574

#SPJ11

Answer:

For example, if a star is moving toward us, its lines will be observed at shorter wavelengths, which is called "blueshifted". If the star is moving away from us, the lines will appear at longer wavelengths, which is called "redshifted".

(please pick as brainlest)

Answer:

balanced forces do not affect the motion of the object. Unbalanced forces affect the motion and velocity of an object.

Answer:

Diboron tetrachloride --->  B2Cl4

Answer:

Matching

6.D

7.A

8.C

9.B

Explanation:

Took test

103 °C, 90 °C, 101 °C Neither accurate nor precise, 100 °C, 99 °C, 100 °C are Precise, 105 °C, 106 °C, 105 °C are Both accurate and precise, 99 °C, 101 °C, 100 °C are Accurate. These are the correct set of measurements of the boiling point of water.

The melting point is defined as the temperature at which solid and liquid phases are at equilibrium state, whereas the boiling point is defined as the temperature at which the pressure of a vapor of a  liquid is equal to the external pressure.

Melting point in which the melting of solid occur to become a liquid at a given temperature, here the molecules gain enough amount of kinetic energy to get the intermolecular forces to convert into another form.

In case of Boiling point the liquid phase enters into the gaseous phase, when the external pressure is high than a temperature for the vapor pressure equal to the external pressure.

Learn more about boiling point, here:

brainly.com/question/28203474

#SPJ2

Since the standard reduction potential for Sn⁴ + /Sn²+ is lower than Cu²+ / Cu, these two combinations will have positive potential. So the correct answer is option D.

The standard reduction potential indicates the rate at which a chemical species tends to decrease, while the standard oxidation potential indicates how often the chemical species tends to oxidize rather than decrease.

The standard reduction potential is equal to the anode standard reduction potential minus the cathode standard reduction potential. The reason for the minus sign is that oxidation is the opposite of reduction.

To learn more about reduction potential, refer to the link:

https://brainly.com/question/31362624

#SPJ12