PLEASE HELP NEEDED URGENTLY !! NO FAKE ANSWERS PLEASE. ONLY CORRECT ANSWERS . NEED IT DONE BY SUNDAY

the number of moles of air in a 4.0 L bottle at 19 °C and 747 mmHg is approximately 0.16 moles.

The ideal gas law equation is expressed mathematically as PV=nRT.

The ideal gas law equation relates the volume, pressure, number of moles, and temperature of an ideal gas. Given the volume of the air (4.0 L), the pressure (747 mmHg), and the temperature (19 °C), the number of moles of air in the 4.0 L bottle can be calculated as follows:

1. Convert the temperature from Celsius to Kelvin:

T(K) = T(°C) + 273.15 = 19 °C + 273.15 = 292.15 K2.

Convert the pressure from mmHg to atm:

747 mmHg × (1 atm / 760 mmHg) = 0.9816 atm3.

Calculate the number of moles of air using the ideal gas law equation:

n = PV/RT = (0.9816 atm × 4.0 L) / (0.08206 L·atm/K·mol × 292.15 K) ≈ 0.16 moles

Therefore, the number of moles of air in a 4.0 L bottle at 19 °C and 747 mmHg is approximately 0.16 moles.

Answer: The correct option is A) 0.5 moles.

learn more about moles here

https://brainly.com/question/15356425

#SPJ11

\(\qquad\qquad\huge\underline{{\sf Answer}}\)

According to above statement, HCl ( Hydrochloric acid ) is a strong acid, which when mixed in water dissociates complete in water to form H+ and Cl- ions that means 100% dissociation. but acids weaker than HCl shows relatively less dissociation.

That is less than 100% dissociation when mixed in water ~

This information tells us about the relative dissociation of weaker acids is that weaker acids dissociates less than 100%.

Dissociation is defined as the breaking up of a compound into simpler constituents or components or parts. Ionic compounds dissociates in the water solution. Stronger acids have 100% ability to dissociate.

So we can conclude that this information tells us about the relative dissociation of weaker acids is that weaker acids dissociates less than 100%.

Learn more about acid here: https://brainly.com/question/25148363

#SPJ2

Answer:

Forests prevent desertification.

Explanation:

Buffers tend to prevent dramatic changes in the pH when proton donors or proton acceptors are added to a solution.

A weak acid and its conjugate base, or a weak base and its conjugate acid, make up a buffer. The amount of acid or base that may be added to a buffer before the pH changes is known as the buffer capacity.

Blood bicarbonate, which keeps the body's internal pH stable, is an illustration of a buffer solution. Any proton acceptor is a base, while any proton donor is an acid. Amphiprotic refers to a material that can function as a proton acceptor or donor. The most prevalent amphiprotic material is probably water.

Therefore, buffers tend to prevent dramatic changes in the pH when proton donors or proton acceptors are added to a solution.

Learn more about buffer here;

https://brainly.com/question/22821585

#SPJ4

The crystal field theory accounts for the color of transition metal ions on the bases of splitting of d orbitals. The energy of the crystal-field splitting is 235kJ/mol.

The crystal field theory accounts for the color of transition metal ions on the bases of splitting of d orbitals. The energy of the spliting is obtained from the wavelength in the visible spectrum.

Now the wavelength is  509 nm hence the energy is obtained from;

E = 6.6 * 10^-34 * 3 * 10^8/509 * 10^-9 * 6.02 * 10^23/1 mol * 1/1000 kJ

= 235kJ/mol

Lear more about crystal field theroy: https://brainly.com/question/14356798

Solubility rules refer to a set of guidelines for predicting the solubility of different ionic compounds in water. According to solubility rules, calcium carbonate (CaCO3) is insoluble in water, so it is the ionic compound that is insoluble in water. The other ionic compounds are soluble in water.

Solubility Rules:Solubility rules refer to a set of guidelines used to predict the solubility of different ionic compounds in water. The rules can be used to determine which ionic compounds will dissolve in water and which ones will not. The solubility of ionic compounds is determined by the strength of the attractive forces between the ions in the compound and the water molecules.Solubility rules:

If an ionic compound contains the following ions, it will be soluble in water:

Sodium (Na+), potassium (K+), ammonium (NH4+), and nitrate (NO3-)If an ionic compound contains the following ions, it will be slightly soluble in water:

Calcium (Ca2+), strontium (Sr2+), and barium (Ba2+)If an ionic compound contains the following ions, it will be insoluble in water:

Carbonate (CO32-), phosphate (PO43-), hydroxide (OH-), and sulfide (S2-)

Therefore, the ionic compound that is insoluble in water is CaCO3 (Calcium Carbonate) as it contains carbonate ions.

Learn more about solubility:

https://brainly.com/question/23946616

#SPJ11

Answer:

B, C and D

Explanation:

Answer:

Test for an odor. The nonpolar substance should have a higher volatility and stronger odor because of its London dispersion forces.

Explanation:

To help Ming identify the non-polar compound, assuming the non-polar compound will have an odor test for it and most importantly, the non-polar substance should have a higher volatility due to its London dispersion forces.

Answer:

B

Explanation:

Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

Answer:

ones in magnets r close together while others can be spread apart

Answer:

Synthetic polymers are human-made polymers, and they are commonly found in a variety of consumer products. Various main chains and side chains are used to make different synthetic organic polymers.

Precipitates are insoluble ionic solid products of a reaction, formed when certain cations and anions combine in an aqueous solution. The determining factors of the formation of a precipitate can vary.

Answer:

physical

Explanation:

The water is turning into the gas state

A peptide bond is a covalent bond that connects two amino acids. Peptide bonds are formed through a condensation reaction between the carboxyl group of one amino acid and the amino group of another amino acid. This results in the release of a molecule of water as the two groups react and form a covalent bond.

The peptide bond is an amide linkage generated by eliminating the elements of water from the two amino acids so joined. Three atoms of water are eliminated from the two amino acids when they are joined by a peptide bond. One amino acid loses an oxygen and hydrogen atom from its carboxyl group, and the other amino acid loses a hydrogen atom from its amino group. The carboxyl group of one amino acid reacts with the amino group of another amino acid to form the peptide bond.

Learn more about peptide bond here ;

https://brainly.com/question/32355776

#SPJ11

Answer:

I thing Calcium Perchlorate

Solar energy is a viable alternative energy resource due to its high usage application.

The solar energy is considered as a viable alternative energy resource because this energy can used in the form of electricity for operating all electrical devices present in our homes.

So we can conclude that solar energy is a viable alternative energy resource due to its high usage application.

Learn more about energy here: https://brainly.com/question/13881533

Answer:

It has an endless supply is the answer.

Answer:

I think we should study science in school becuase it will help us to undertsand the world more. Our knowledge as humans have progressed due to science research; at one time we didn't know how trees produce oxygen.

Explanation:

The first and second pair of compound are diastereomers while the third pair of molecules is constitutional isomers.

Diastereomers are substances that share the same molecular formula and arrangement of bound components but are not superimposable or mirror reflections of one another.

Stereoisomers that are not identical mirror images are known as stereostereomers. Because they are not mirror reflections of one another, they happen when two or more stereoisomers of a substance have distinct configurations at one or more of the equivalent stereocenters.

Stereoisomers are isomers that differ in spatial arrangement of atoms, rather than order of atomic connections as observed in the first two pairs of molecules.

Constitutional isomers, often referred to as structural isomers, are a particular class of isomers that have the same chemical formula but different atomic arrangements and bonding patterns.

The question is incomplete. The pair of molecules are missing which are attached.

Learn more about Diastereomers:

brainly.com/question/27881881

#SPJ4

Answer:I think it might be 6????

Explanation: I could be totally wrong so I apologize if so

25 is the total number of orbitals which can be present in the fifth energy level of an atom .

What are orbitals ?

In orbital, chemistry and physics, a mathematical term called a wavefunction that describes the properties of two or fewer electrons near a nucleus or nuclear system, such as a molecule. An orbital is often represented as the 3-dimensional region where an electron has a 95% chance of being found.

Understand the concept of different eye socket shapes and sizes.

Atomic orbitals are usually denoted by a combination of numbers and letters (eg, 1s, 2p, 3d, 4f) that represent certain properties of the electron associated with the orbital. The numbers, the so-called principal quantum numbers, indicate the energy levels and their relative distances from the nucleus.

l=0 to l=(n−1) . For each of the orbital states we have a different number of total orbitals which is increasing as the azimuthal number increases. Hence, the total number of orbitals in the fifth energy level is 25.

To learn more about the orbitals , click the given link ;

https://brainly.com/question/14361631

#SPJ1

Answer:

D "Before the process, the substance was a liquid. After the process, it was a gas.

Explanation:

hope this helps.

According to the forces of attraction , before the process substance was liquid and after the process it was a gas as gas molecules are farther away than those in liquid.

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

Learn more about forces of attraction,here:

https://brainly.com/question/24013868

#SPJ2

Electrons tend to occupy the lowest available energy level.

This is in accordance with the Aufbau principle, which states that electrons fill orbitals in order of increasing energy levels. Electrons prefer to occupy lower energy orbitals because they are more stable, and therefore, require less energy to maintain their current state. The electron configuration of an atom describes the arrangement of its electrons in various orbitals.

The energy levels of electrons in atoms are described using the principal quantum number (n). The first energy level (n = 1) is the lowest energy level, and it is closest to the nucleus. As the value of n increases, so does the energy level of the electron, and the distance from the nucleus increases as well. In summary, electrons tend to occupy the lowest available energy level because they are more stable and require less energy.

Learn more about Aufbau principle at:

https://brainly.com/question/15006708

#SPJ11

Answer:

I think it would be the beach because all the waves and such but in a pool with more people there is a tight space so they cant move around as much and as freely. But this could be a trickster question but I would choose the beach.

Hope this is right :)

The highest oxidation state for Nb (niobium) is +5.

Oxidation is the loss of electrons in a chemical reaction. For the element niobium (Nb), the highest oxidation state is +5. This is because niobium has five valence electrons in its outermost shell, which it can lose to form a +5 oxidation state.

This is commonly seen in compounds such as Nb₂O₅ (niobium pentoxide) and NbF₅ (niobium pentafluoride). That being said, it is important to note that niobium can also form lower oxidation states, such as oxidation state +3 and +4. However, the +5 state is the highest possible for niobium.

Learn more about oxidation at https://brainly.com/question/25886015

#SPJ11

First, we need to make the exponent of 10 the same for both.

So let's transform 6.5500 x 10^5 into some number x 10^3.

For this, we need to move the dot to the right, some places where it gives the number 3. In this case, 2 places.

655.00 x 10^3

now we can sum the numbers

8.6500 x 10^3 + 655.00 x 10^3 = 663.65 x 10^3

now we need to transform this number into scientific notation. For this, must have only one number before the dot(on the left side of the dot). We will move the dot to the left, 2 places:

6.6365 x 10^5

Answer: 6.6365 x 10^5