a 32 ml sample of hydrogen is collected over water at 20 c 750 mm of hg. what is the volume of the dry gas at st)? (vapor pressure of water at 20 c

Dispersion force of intermolecular force forms between all types of molecule due to the presence and movement of electrons around the molecule.

The term dispersion force is defined as a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that build the atoms to form temporary dipoles.

Whether they are polar or nonpolar, all molecules exhibit dispersion forces. Atoms and molecules that are bigger and heavier show larger dispersion forces than those that are smaller and lighter.

Thus, Dispersion force of intermolecular force forms between all types of molecule due to the presence and movement of electrons around the molecule.

To learn more about the dispersion force, follow the link;

https://brainly.com/question/14958417

#SPJ1

Option (d) is correct. The independent variable is not manipulated in a negative control group.

A control group is a subset of participants who are kept apart from the other participants so that the results of the independent variable under study are not affected. The effects of the independent variable on the experiment are isolated. Another differences made in between positive and negative control groups. The experimental settings in positive control group ensure a favorable outcome. An experiment that has a positive control group can demonstrate that the experiment is going in a proper way. A control group is most required for the separation of  experiment in a proper way.

To learn more about Control group please visit:

https://brainly.com/question/25801453

#SPJ4

The complete question is,

What is the key difference between test and negative control groups in an experiment?

(a) The independent variable is not manipulated in a test group.

(b) A negative control group has a known and expected response to     manipulation

(c) Subjects in a test group should have different characteristics than subjects in a negative control group.

(d) The independent variable is not manipulated in a negative control group.

In aqueous solutions, hydrogen bonds have similar bond strength as ionic bond interactions. Thus option B is the answer.

In aqueous solutions, ionic interactions occur between positively and negatively charged ions, which are held together by electrostatic forces. These forces are relatively strong and are responsible for the high melting and boiling points of ionic compounds. Hydrogen bonds, on the other hand, are a type of dipole-dipole interaction between the partially positive hydrogen atom of one molecule and the partially negative atom of another.

The strength of hydrogen bonds is about 5-10% of the strength of covalent bonds, which is similar to the strength of ionic bonds in aqueous solutions. This makes hydrogen bonds the type of bond or force that has similar bond strength as ionic bond interactions in aqueous solutions. These type of bonds are found in many biomolecules like DNA and RNA, proteins and many other natural and synthetic compounds.

Learn more about aqueous solutions:

https://brainly.com/question/26856926

#SPJ4

Atoms that contain the same number of protons but different numbers of neutrons are called isotopes of the element. We total the number of protons and neutrons to name the isotope.

Answer: Your answer would be, Isotopes!

Explanation: Isotopes, also known as isotopic nuclides, are two atoms with the same atomic number but different masses (the same number of protons but different numbers of neutrons).

The concentration in units of mole fraction is calculated to be 1.80 × 10⁻⁵ when the solubility of oxygen gas in water at 40° C is 1.0 mmol/l of solution.

In the 1 Liter of a solution, the solubility of 1.0 mmol/L can be written as:

= 0.001 mol of oxygen.

However, the moles of water in 1L can be calculated as follows;

We know that 1 L of water = 1000 mL of water.

Lets assume that the density of the water is 1.0 g/mL

density = mass/volume

Making mass the subject of the formula:

Mass = density × volume

Mass = 1.0 g/mL× 1000 mL

Mass of water = 1000 g

number of moles = mass(g)/molar mass

Given the number of moles of water are 1000 g/ 18.02 g/mol

Given the number of moles of water are 55.49 moles

Mole Fraction of oxygen = no. of moles/ total no. of moles in the system

Mole Fraction of oxygen= 0.001 moles/55.49 moles

mole fraction of oxygen = 1.80 × 10⁻⁵.

Learn more about density:

brainly.com/question/29775886

#SPJ4

The empirical formula of the given compound is  CH₂O and the molecular formula of the given compound is C₆H₁₂O₆.

The mass of the Carbon = 48.38 g

The molar mass = 12 g/mol

The moles = mass / molar mass

                  = 48.38 / 12

                 = 4 mol

The mass of the hydrogen = 6.74 g

The moles = mass / molar mass

                  = 6.74 / 1

                  = 6.74

The mass of the oxygen = 53.5 g

The moles = mass / molar mass

                  = 53.5 / 16

                  = 3.3 mol

Dividing the smallest one , we get:

C = 1 mol

H = 2

O = 1

The empirical formula is CH₂O.

The molecular formula = n( empirical formula )

n = molar mass of compound / molar mass of empirical formula

n = 180.15 / 30

n = 6

The molecular formula = C₆H₁₂O₆.

To learn more about empirical formula here

https://brainly.com/question/29104872

#SPJ4

To find the time required for 2.00 M PH3 to decrease to a concentration of 0.350 M, we can use the concept of first-order reactions. The rate of a first-order reaction is given by the equation:

-d[A]/dt = k[A]

Where:

-d[A]/dt = rate of the reaction (M/s)

k = rate constant (s^-1)

[A] = concentration of the reactant (M)

In this case, the reactant is PH3, and the concentration is decreasing over time. The rate of the reaction is proportional to the concentration of the reactant, and the rate constant is a constant value for a given reaction.

We know that the initial concentration of PH3 is 2.00 M, and the final concentration is 0.350 M. We also know that the time required for 1.00 M PH3 to decrease to 0.250 M is 120 s. We can use this information to find the rate constant k for the reaction.

We know that:

-d[A]/dt = k[A]

We can use the initial and final concentrations of PH3 to find the change in concentration over time and the rate of the reaction:

-d[A]/dt = (0.250 - 1.00) M / 120 s = -0.0075 M/s

Now that we know the rate of the reaction, we can use it to find the time required for 2.00 M PH3 to decrease to a concentration of 0.350 M.

We know that:

-d[A]/dt = k[A]

and we can rearrange the equation to find the time:

-d[A]/[A] = kdt

We can use the initial and final concentrations of PH3, and the rate constant k to find the time:

(0.350 - 2.00) / (-0.0075) = t

t = (1.65/0.0075) = 220 s

So, the time required for 2.00 M PH3 to decrease to a concentration of 0.350 M is 220 seconds.

Find more about First-order Reactions here: https://brainly.com/question/1769080

#SPJ4

Seven electrons are altogether present in the neutral chlorine atom's maximum occupied energy level.

The outer energy level that electrons in an atom occupy is designated by the period number (abbreviated as "n").

The amount of energy levels that an element has depends on the period number it is in.

The number of electrons in atoms rises within the same orbit as we travel through a period in a periodic table from left to right.

So, we may conclude that the period number indicates the maximum energy level that an atom's electrons are currently occupying.

The electrons' greatest energy level is indicated by the period number.

For such more question on energy level.

https://brainly.com/question/14287666

#SPJ4

1 mole of CH4 is Avogadro's number of molecules. So 1 mole of CH4 is about 16.04 grams.

Mole  is the base unit for the quantity amount of substance in the International System of Units. After being redefined in 2019, the definition of the unit mole, as stated in the ninth edition of the SI Brochure, is as follows.

The mole, which is symbolized by the mole, is the SI unit amount of substance . One mole contains exactly 6.02214076×1023 elementary entities. This number, called Avogadro's number, is the fixed numerical value of Avogadro's constant NA when expressed in units of mol−1.

The amount of substance, which is symbolized by n, in a system is a measure of the number of certain elementary entities. Elementary entities can be in the form of atoms, molecules, ions, electrons, other particles, or a certain group of particles.

Previously, this unit was defined as the amount of chemical substance containing a representative number of particles (now called elementary entities), for example atoms, molecules, ions, electrons, or photons, which is equivalent to the number of atoms in 12 gram of carbon-12 (12C), isotopes carbon with a definitive standard atomic weight of 12. This number was also previously expressed as Avogadro's number. Before being precisely defined in the redefinition, the Avogrado number was considered to be "approximately" to 6.022140857×1023 mol−1.

The mole is widely used in chemistry as a convenient way of expressing the amounts of reactants and products in a chemical reaction. For example, the equation 2 H2 + O2 → 2 H2O means that 2 mol dihydrogen (H2) and 1 mol dioxygen (O2) react to form 2 mol of water (H2O). The mole is also used to express the number of atoms, ions or other elementary entities in a sample of a given substance. The concentration of a solution is generally expressed as molarity, which is defined as the number of moles of solute per liter of solution.

Learn more about mole at https://brainly.com/question/22185978.

#SPJ4

The net ionic equation for the following double replacement reactions is 2 Ag²[tex]\rightarrow[/tex]2 Ag³[tex]^+[/tex] as all the ions present on reactant and product side which will get cancelled.

Ionic equation is defined as a chemical equation which represents electrolytes in aqueous solutions and are expressed as dissociated ions. Ions present in aqueous solutions are stabilized by ion dipole interactions with the water molecules which are present.

An ionic equation can be written for any electrolyte which dissociates and reacts with the polar solvent. In a balanced ionic equation , number and type of atoms on each sides of reaction arrow are same. Even the net charge on both sides of the arrow is same.

Learn more about ionic equation,here:

https://brainly.com/question/15466794

#SPJ1

Yes, O2 can form ionic bonds with number of elements from periodic table.

The third most prevalent element in the universe is oxygen. It makes up around 21% of the Earth's atmosphere and two-thirds of the mass of the human body. It is extremely reactive and may interact with the majority of the periodic table's elements. Since oxygen gas is only two oxygen atoms joined together by a covalent connection, oxygen makes a covalent bond with itself. Along with other elements nearby on the periodic table, it can form covalent bonds with carbon, nitrogen, and other elements. But elements to the left of the periodic chart, including sodium and calcium, can form ionic bonds with oxygen.

To learn more about Oxygen visit,

https://brainly.com/question/13370320

#SPJ4

Rusting is one of many example of corrosion. The chemical reaction for rusting is given as follows:

4Fe + 3O2 → 2Fe2O3.

Rusting is an oxidation process. Oxygen present in the air produce a powdered substance called rust. The rust is a red-orange flaky substance and the phenomenon of the formation of rust is called rusting.

In the first step iron is first oxidized to iron(II) ions by oxygen. In the second step, the iron(II) ions are again oxidized and combine with water and oxygen gas to form a hydrated form of iron(III) oxide called as rust.

Thus, Rusting is one of many example of corrosion.

To learn more about the rusting, follow the link;

https://brainly.com/question/13026484

#SPJ1

Answer:

The answer is 6 moles.

Explanation:

To calculate the amount of Al2S3 that can be produced from 12 moles of Al, we need to determine the amount of S that is required:

12 moles Al / 2 moles Al per mole Al2S3 = 6 moles Al2S3

3 moles S per mole Al2S3 * 6 moles Al2S3 = 18 moles S

Since 12 moles of Al are available, the maximum amount of Al2S3 that can be produced is 6 moles.

The maximal number of hydrogen bonds a single molecule of methanol can form with surrounding water molecules are three.

Methanol can act as both as a hydrogen bond donor and as a hydrogen bond acceptor. Methanol is similar to formaldehyde. It contains oxygen. Oxygen is very polar. The difference in their boiling points is due to the very strong hydrogen bonds in methanol. Hydrogen bonding occurs when there is a significant amount of positive charge building up on a hydrogen atom. Methanol is a polar molecule. The oxygen being the negative area and the hydrogen being the more positive area. Methanol is a alcohol that is used as a solvent, pesticide and other fuel source. It also occurs naturally in humans, animals and plants.

To learn more about Methanol please visit:

https://brainly.com/question/14889608

#SPJ4

The resulting mixture will have a sugar concentration of 22.22% when 5g of sugar is added to a 45g of serving which is 10% sugar.

This is calculated by adding the grams of sugar (5g) to the existing grams of sugar (4.5g) and dividing by the total grams of cereal (45g). The resulting percentage is then multiplied by 100 to express it as a percentage.

5+4.5=9.5

9.5/45×100=21.11

To put this into perspective, the original 10% sugar concentration translates to 4.5g of sugar in the 45g serving, and the addition of the 5g of sugar brings the total to 9.5g of sugar.

When divided by the total of 45g of cereal, this yields a concentration of 21.11%, which is then multiplied by 100 to give the final percentage of 22.22%.

Learn more about concentration:

https://brainly.com/question/24147934

#SPJ4

Answer:

Explanation:

The equation for the reaction between potassium and water to produce potassium hydroxide and hydrogen gas is:

K + H2O -> KOH + H2

Using the ion-electron method, we can balance the equation as follows:

Write the unbalanced equation

K + H2O -> KOH + H2

Write the ionization equation for H2O (water)

H2O -> H+ + OH-

Multiply the coefficients in the ionization equation by the number of H2O molecules in the unbalanced equation (in this case, one) to balance the number of H+ and OH- ions

H2O -> H+ + OH-

Substitute the H+ and OH- ions into the unbalanced equation

K + H+ + OH- -> KOH + H2

Balance the remaining atoms and charge

K + H+ + OH- -> KOH + H2

check charge and atom balance

K + H+ + OH- -> KOH + H2

Simplify the equation

K + H2O -> KOH + H2

The balanced equation is K + H2O -> KOH + H2

The mole ratio of hydrogen to ammonia is 3:1. The formula for ammonia is NH3.

Second, ammonia has a high hydrogen weight fraction. Hydrogen accounts for 17.65% of ammonia’s mass. When these two characteristics are coupled, the outcome is a liquid that is simply confined and has a volumetric hydrogen density that is approximately 45% more than liquid hydrogen.

Using the atomic masses, convert the mass of each element to moles of each element. Divide the number of moles of each element by the least number of moles to find the ratio or moles of each element. The mole table organizes all of the information required to estimate the limiting reagent and theoretical yield, which are then utilized to compute percent yield. The percentage yield informs the chemist.

To learn more about hydrogen to ammonia to refer:
https://brainly.com/question/14693026
#SPJ1

Answer: Boiling Point/Boiling Temperature.  212°F or 100°C.

Explanation:

Answer:

74.093 grams

Explanation:

Answer and Explanation: The mass of a mole, or molar mass, of Ca(OH)2 is 74.093 grams. This is the combined molar mass of each of the atoms in the molecule: one calcium atom, two oxygen atoms, and two hydrogen atoms.

First, we need to calculate the total area of the lawn in square feet. We can do this by multiplying the width and length of the lawn:

16.0 feet * 20.0 feet = 320.0 square feet.

Next, we need to calculate the total number of snowflakes that accumulate on the lawn per minute. We can do this by multiplying the area of the lawn by the number of snowflakes per square foot per minute:

320.0 square feet * 1350 snowflakes/square foot/minute

= 432000 snowflakes/minute.

We want to know the amount of snow in kilograms that accumulates on the lawn per hour, so we need to convert the number of snowflakes to a mass in kilograms. We know that each snowflake has a mass of 2.00 mg, so we can convert this to kilograms by dividing by 1,000,000:

2.00 mg / 1,000,000 = 0.000002 kg/snowflake.

Now we can multiply the mass of one snowflake by the number of snowflakes per minute to get the total mass of snow in kilograms that accumulate on the lawn per minute:

0.000002 kg/snowflake * 432000 snowflakes/minute = 0.864 kg/minute.

Finally, to find the total mass of snow in kilograms that accumulates on the lawn per hour, we multiply the mass of snow in kilograms that accumulates per minute by the number of minutes per hour:

0.864 kg/minute * 60 minutes/hour = 51.84 kg/hour.

Learn more about Law of Conservation of Mass here: https://brainly.com/question/19694949

#SPJ4

During a reduction reaction, electrons are gained by the molecule or ion that is being reduced.

This is the opposite of an oxidation reaction, where electrons are lost. The electrons that are gained by the molecule or ion that is being reduced typically come from another molecule or ion, which is then oxidized.

Reduction is a chemical reaction in which electrons are transferred from one molecule or ion to another. This process is the opposite of the oxidation reaction, which involves the loss of electrons. In a reduction reaction, the molecule or ion that gains electrons is said to be reduced, while the molecule or ion that loses electrons is said to be oxidized.

Reduction reactions are important in many areas of chemistry, including organic chemistry and biochemistry.

Learn more about reaction Reduction:

https://brainly.com/question/21851295

#SPJ4

Some effective learning strategies for mastering the concepts of organic chemistry that marques easily can learn include active learning, spaced repetition and self-explanation, etc.

1. Active learning: This involves actively engaging with the material, such as through problem-solving, experimentation, and discussion on organic chemistry.

2. Spaced repetition: This involves reviewing material at increasing intervals to help retain information over time.

3. Elaborative rehearsal: This involves connecting new information to existing knowledge, such as by explaining concepts in one's own words or relating them to real-world examples.

4. Self-explanation: This involves explaining how new information relates to what one already knows and why it is important.

5. Interleaving: This involves practicing different skills or concepts within a single study session, rather than focusing on one at a time.

6. Practice Testing: This involves taking practice tests to help solidify your understanding of the material.

7. Mnemonics: This involves using memory aids such as acrostic, acronym, or mental imagery to memorize complex information.

8. Distributed practice: This involves spreading out study sessions over time, rather than cramming, to improve retention and recall.

To know more about organic chemistry please refer: https://brainly.com/question/4975434

#SPJ4

It is computed that 0.625 g of argon dissolved in 150 g of water has a molality of 0.1 moles/kg.

Molality is one way to describe the amount of a solute in a solution. You can express the unit of measurement as kilograms of solvent divided by moles of solute. The solute's mass needs to be translated into moles. In order to determine the molality of the given solution, further divide it by the mass of the solvent.

Since, the water weighs 150.0 grams.

But first, the moles should be determined.

moles= mass/ mass molar

moles = 0.625 g/  39.948 g/ moles

= 0.0156 moles.

molality = moles / kg

molality = 0.015 moles/ 0.15 kg

molality = 0.1 moles/ kg

Learn more about molality:

brainly.com/question/4058239

#SPJ4

From the graph, the distance for the first 10 minutes is 600 meters.

10 minutes = 10 x 60 = 600 seconds

Ruth's speed for the first 10 minutes = distance/time

                                                            = 600/600 = 1 m/s

Average speed = total distance traveled/total time taken

Total distance = 1400 meters

Total time = 25 minutes = 25 x 60 = 1500 seconds

Average speed = 1400/1500 = 0.93 m/s

Ruth had traveled 800 meters before stopping to talk to her friend:

1400 - 800 = 600 meters.

Thus, she was 600 meters away from home when she stopped.

She stopped between 10 and 20 minutes:

20 - 10 = 10 minutes

Thus, she stopped to talk to her friend for 10 minutes.

More on velocity-time graphs can be found here: https://brainly.com/question/11290682

#SPJ1

A material known as an inorganic mineral is one that has never been alive; it has never been joined with carbon and cannot give life to a cell. The body will actually react to these substances or metals as though they were toxins.

An inorganic mineral is tightly wrapped, making it difficult for the body to break it down. This material's electrons rotate counterclockwise, which puts them fundamentally out of rhythm with a human body.

In nature, evaporation is a common method for removing inorganic compounds from water since only the water is lost, leaving the inorganic minerals and chemicals behind.

In order to provide us with cleaner and safer drinking water, contemporary water filtration systems mimic this natural phenomena in our houses.

Learn more about inorganic mineral:

https://brainly.com/question/2879255

#SPJ4

Taking into account the reaction stoichiometry, the correct answer is the second option: a mass of 13 grams of C₂H₂ is required to produce 1 mole of CO₂.

In first place, the balanced reaction is:

2 C₂H₂ + 5 O₂ → 4 CO₂ + 2 H₂O

By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: If by reaction stoichiometry 4 moles of CO₂ are formed by 52 grams of C₂H₂, 1 mole of CO₂ is formed by how much mass of C₂H₂?

mass of C₂H₂= (1 mole of CO₂× 52 grams of C₂H₂)÷ 4 moles of CO₂

mass of C₂H₂= 13 grams

Finally, a mass of 13 grams of C₂H₂ is required.

Learn more about the reaction stoichiometry:

brainly.com/question/24741074

brainly.com/question/24653699

#SPJ1

Molarity is measured in moles per liter (mol/L). A solution with a concentration of 1 mol/L is referred to as a 1 M solution or has a concentration value of 1 molar.

The mole is a fundamental (SI) unit of substance measurement. This quantity is also known as the chemical amount. A substance is something with mass that occupies space. The molar mass/molecular weight is the total mass in grams of the atoms that make up a molecule per mole. In order to know that M is denoted for molarity. It is referred as number of moles per liter of solution.  In other terms, a solution with a concentration of 1 mol/L is referred to as 1 molar, abbreviated as 1 M. And 1 M is one times smaller than a mol/L and one mole is equivalent to 6.02214179 molecules or other elementary units.

Learn more about the molarity here:

https://brainly.com/question/3757798

#SPJ4

oxidation-reduction reactions is a reaction that involve the transfer of electrons from one species to another.

Redox reactions, also referred to as oxidation-reduction processes, are reactions in which electrons are transferred from one species to another. An oxidized species is one that has lost electrons, whereas a reduced species has gained electrons.

By assuming that all bindings to the atoms in molecules are ionic, we can use the oxidation numbers assigned to atoms in molecules to detect redox reactions. In a reaction, oxidation is shown by an increase in the number of oxidations, and reduction is indicated by a drop.

Learn more about redox at brainly.com/question/13182308

#SPJ4

A scientist investigated a type of bacterium and a type of virus.  The results of the investigation demonstrate that the dish with bacteria has live cell while the dish with virus present in host cell.

The term bacteria is defined as a large group of single-cell microorganisms. While some bacteria are hazardous, the majority have beneficial functions.

They are employed in industrial and medical procedures and sustain a wide variety of living forms, including both plant and animal life.

Thus, The results of the investigation demonstrate that the dish with bacteria has live cell while the dish with virus present in host cell.

To learn more about the bacteria, follow the link;

https://brainly.com/question/8008968

#SPJ1

The signs of standard Gibbs energy, enthalpy, and entropy of precipitation would be positive, zero, and negative respectively when a soluble salt is present in which the absolute value of the lattice enthalpy is more than the absolute value of the heat of hydration.

This is because the Gibbs free energy of the system decreases as the formation of the precipitate is exothermic and entropy increases due to the formation of more particles.

The formation of a precipitate also has an effect on the pH of the solution. If the salt is an acid, the formation of the precipitate will decrease the pH, and if the salt is a base, the formation of the precipitate will increase the pH. This is because the number of free hydrogen or hydroxide ions in the solution is reduced when the precipitate forms.

Learn more about signs of standard Gibbs energy

https://brainly.com/question/10001162

#SPJ4