What change would shift the equilibrium system to the left?
ag) +b(s) + energy = 3c)
o adding more of gas c to the system
o heating the system
increasing the volume
o removing some of gas c from the system

Answer:

3p6 3d4

Explanation:

3d will come after 3p => 3p 3d

p will hold maximum of 6 electrons while d will hold maximum of 10 electrons.

if there are 8 more electrons to 3p2, then 4 will fill 3p so it will become 3p6

then the other 4 will fill 3d to become 3d4

Answer:

The weather from the outside has impact n what goes on inside. Due to it being hot and muggy out, the weather was able to mess with the temperature in the house.

Explanation:

An air condition is used to regulate the temperature of a room by removing heat as well as reducing humidity.

Temperature is the degree of coldness or hotness of an object or a particular place.

The temperature of an area is affected by the climate and the amount of sunshine.

Also due to heating, water vapor rises into the atmosphere resulting in humidity.

An air condition makes a temperature room cooler by removing heat as well as reducing humidity.

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Answer:

4 moles of carbon

6 moles of water

Explanation:

I think as there no data given u have to is the numbers infront of the equation e.g 4CO2 so 4.

hope this helps :)

Answer:

the fish is the organism that evolved last

Answer:

3) 2-8-7

Explanation:

An atom is in an excited state when it is very close to having a full octet (either it gains or loeses electrons to get a full octet). The first shell should have two electrons and the next one and the one after that should be eight. Since the third shell has 7 electrons it needs to gain one more electron to get a full octet. Therefore the answer is 3

Polypeptides : Peptides are tiny chains of amino acids connected by the peptide bonds.

Function of polypeptides : Polypeptides aid make up proteins by bonding many amino acids conjointly.

Amino acids are organic components that comprises both amino and carboxylic acid functional groups.

Sequence of amino acids are known as polypeptides. The covalent bonds that hold on to amino acids conjointly are known as peptide bonds.

Types of amino acids : nonpolar, polar, negatively charged, and positively charged.

According to question

Linking amino acid monomers together to form a polymer requires the formation of peptide bonds.

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Answer:

B

Explanation:

None of the other responses doesn't seem right. A is to broad someone can be a scientist and might not be highly educated. C not every scientist studies this field so no. Same goes for D

Answer:

B

Explanation:

C/ If Fe is greater than Fg, the negatively charged oil droplet will move freely toward the negatively charged plate.

In the Millikan oil droplet experiment, the negatively charged oil droplets are subjected to an electric field created by the charged plates. The electric force (Fe) acts on the oil droplet in a direction opposite to the gravitational force (Fg). When Fe is greater than Fg, the electric force overcomes the gravitational force, causing the negatively charged oil droplet to experience an upward force. As a result, the oil droplet moves freely upward toward the negatively charged plate.

Option B is incorrect because if Fe is equal to Fg, the forces balance each other, resulting in a stationary droplet. However, the question states that Fe is increased until it is greater than Fg, implying that the droplet is no longer stationary but moves in response to the electric force.

Therefore, option C is the correct answer, as it describes the effect of an electric field on the motion of a negatively charged oil droplet in the Millikan oil droplet experiment.

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At STP,  17.1L  is the volume of 0.765 moles of helium. Helium is a colorless, tasteless, non-toxic, neutral, monatomic gas.

Helium is indeed a chemical element only with atomic number 2 and the symbol He. This is a colorless, colorless, tasteless, non-toxic, neutral, monatomic gas that is the first in the periodic table's noble gas group.

It has the lowest boiling point of any element, and it has no melting point at ordinary pressure. One mole for ideal gas takes up 22.4L at STP.

volume = 0.765×22.4L

              = 17.1L

Therefore, at STP, 17.1L  is the volume of 0.765 moles of helium.

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Compound III is the ester in the given options.

To identify the ester among the compounds provided, we need to understand the characteristics of an ester. Esters are organic compounds that are formed by the reaction between an alcohol and an organic acid, resulting in the elimination of water. They have the general structure R-COO-R', where R and R' represent alkyl or aryl groups.

In the given options, compound III, when properly named, is ethyl ethanoate (CH3COOCH2CH3). It consists of an ethyl group (CH3CH2-) attached to the carbonyl carbon of an ethanoate group (-COO-). This structure corresponds to the general structure of an ester.

On the other hand, compounds I, II, IV, and V do not exhibit the characteristics of an ester. Compound I is not selected. Compound II is not an ester, but rather an alkene. Compound IV is not an ester, but rather an amide. Compound V is not an ester, but rather a ketone.

Therefore, compound III (ethyl ethanoate) is the ester among the given options.

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Answer:1.067

Explanation:

look it up

Answer:

Explanation:

Na2O has 2 atoms of Sodium and 1 atom of Oxygen

So, the molecular mass of Na2O is:

(2 x Atomic weight of Na) + (1 x Atomic weight of O)

Atomic weight of Na = 22.99 g

Atomic weight of O = 16 g

Therefore, Molecular Mass of Na2O = (2x 22.99g) + (1 x 16g)

= (45.98 + 16)g = 61.98 g

Therefore 61.98 g of Na2O contains 6 x 10^23 molecules (Avogadro's number).

24.6 g of Na2O therefore contains:

(24.6/61.98) x 6 x 10^23 = Answer!

The synthesis of dibenzalacetone can be achieved through a base-catalyzed aldol condensation reaction between two molecules of benzaldehyde and one molecule of acetone.

The reaction mechanism involves the formation of reactive intermediates such as enolate ions and alpha-beta unsaturated carbonyl compounds.

Initially, the acetone is deprotonated by a base such as sodium hydroxide to form an enolate ion. The benzaldehyde also undergoes deprotonation to form a benzyl anion. The enolate ion then attacks the benzyl anion to form an alpha-beta unsaturated carbonyl compound known as benzylideneacetone.

The benzylideneacetone molecule can then undergo another aldol condensation reaction with another molecule of benzaldehyde, to form the final product dibenzalacetone. The reaction mechanism involves the formation of reactive intermediates such as enolate ions and alpha-beta unsaturated carbonyl compounds.

The major product formed in this reaction is dibenzalacetone, while the minor product formed is benzylideneacetone. The mechanism for the formation of dibenzalacetone involves the intermediate formation of benzylideneacetone, which subsequently undergoes another aldol condensation reaction with benzaldehyde to form the final product.

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Answer:

False

Explanation:

The air masses are not responsible for weather , it is cause by the Earth evolution

Answer:

They are formed by windblown sand collecting around an obstruction. As organic matter is deposited by wind and waves, low herbs colonize the dune. As these plants collect more sand and organic matter, the dune increases in height becoming the fore dune.

The column number of an element in the periodic table is generally determined on the basis of the number of valence electrons. The elements in the same column have similar chemical properties.

The electrons present in the outermost shell of an atom which take part in chemical reactions are called the valence electrons. These electrons are responsible for the interaction between the atoms and the formation of chemical bonds.

The valence electrons of an atom also gives us an idea about the chemical properties of elements like valency, the number of unpaired electrons present, etc. The column number of an element is mainly determined on the basis of number of valence electrons.

The elements are placed in vertical columns in the periodic table. There are 2 electrons in the outermost shell of Alkaline earth metals. So they belong to second column.

Thus it is the valence electron which determines the column number.

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Answer:

A communicable disease

Explanation:

Diseases that can be transferred are known as communicable diseases.

In the following question, in the missing blanks, Hydrocarbons such as petroleum and coal are composed primarily of carbon and hydrogen atoms.

Hydrocarbons are chemical compounds that are made up of carbon and hydrogen atoms.What are Hydrocarbons?A hydrocarbon is a type of compound that is made up of carbon and hydrogen atoms exclusively. Alkanes, alkenes, alkynes, and aromatic hydrocarbons are some of the most common hydrocarbons. They are mainly used as fuel sources, but they are also used in many industrial applications. Alkanes are hydrocarbons that have single covalent bonds between carbon atoms. Methane, ethane, propane, butane, pentane, hexane, heptane, octane, nonane, and decane are the most common alkanes. Alkenes are hydrocarbons that have double covalent bonds between carbon atoms. Ethene, propene, butene, pentene, and hexene are the most common alkenes. Alkynes are hydrocarbons that have triple covalent bonds between carbon atoms. Ethyne, propyne, butyne, and pentyne are the most common alkynes. Aromatic hydrocarbons, such as benzene and naphthalene, have a unique ring structure that is characterized by a set of delocalized pi electrons.

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Answer:

Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.

Explanation:

There are two molecular orbitals are needed to form one bonding molecular orbital and one anti-bonding molecular orbital.

Bond orbitals Electrons that spend most of their time between the nuclei of two atoms are placed in bonding orbitals, and electrons that spend most of their time outside the nuclei of two atoms are placed in anti-bonding orbitals.

Adding up the same number of atomic orbitals gives the same number of molecular orbitals. Two atomic orbitals combine to form two molecular orbitals. An anti-bonding orbital is essentially the opposite of a bonding orbital. They form when atomic orbitals combine in ways that lead to almost destructive interference.

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Answer:

Limiting reagent is NH3
Mass of NH3 = 30.08 gm
Mass of F2 = 222.08 gm
Mass of HF  = 106.15 gm

Explanation:
Given reaction: 2 NH3 + 5 F2 → N₂F4 + 6 HF
2 moles of NH3 (17 u) react with 5 moles of F2 (38 u)
Now, we know that 54 gm of F2 was left over, hence the limiting reagent must be NH3.
So we shall use gravimetric analysis on NH3.

Molar mass of N2F4 = 104 u
Weight of N2F4 = 92 g
Moles of N2F4 = 92/104 moles
2 moles NH3 gives 1 mole N2F4
so 92/104 mole of N2F4 is given by 92*2/104 mole NH3.
184/104 mole NH3, or 184*17/104 = 30.08 g
The moles of F2 will be 92*5/104, and mass will be
168.08 + 54 = 222.08 gm

Mass of HF present will be 92*6*20/104 = 106.15 gm

Answer:

An acid is a solution with more H+ ions than OH- ions. An acid is any compound that yields hydrogen ions (H+) or hydronium ions (H3O+) when dissolved in water. Hydronium ions – are the combination of H+ ions and H2O molecules.

Explanation:

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A sample of matter that contains atoms that all have the same number of protons is an element.

These are called isotopes. They have the same number of protons and electrons, but different numbers of neutrons. Different isotopes of the same element have different masses.

A proton is a subatomic particle found in the nucleus of atom. The particle has a positive electrical charge, equal and opposite to the electron.

This is a tiny, dense region at the center of the atom. Protons have a positive electrical charge (+1) and a mass of 1 atomic mass unit (amu), which is about 1.67×10−27 kilograms. And,

A chemical element is a species of atoms that have a given number of protons, including the substance consisting only of that species. Unlike chemical compounds.

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Answer:d

Explanation:

Acetylsalicylic acid (aspirin), HC9H7O4, in a 0.593 M solution has a percent ionization of 0.784 percent.

In a solution, ionization is the process of producing ions. A chemical substance that splits into electrically charged particles, ions, when dissolved in water is said to undergo ionization. The ionization constant (Ka) is a measure of the tendency of a weak acid to ionize, which is calculated by multiplying the molar concentration of the ionized acid by the molar concentration of the hydrogen ion to get the concentration of the undissociated acid divided by the concentration of the dissociated acid squared. In addition, the equation for calculating percent ionization is as follows: % ionization = (ionized concentration/initial concentration) × 100 percent. Calculation Acetyl salicylic acid is a weak acid that partially ionizes in aqueous solution, producing H+ ions. The following equation represents the ionization of aspirin in water: HC9H7O4 + H2O → H3O+ + C9H7O4¯ Initially, the concentration of the undissociated acid is equal to the initial concentration. The ionized concentration is determined by the ionization constant (Ka) and the initial concentration. For weak acids such as acetylsalicylic acid, the value of Ka is typically small. So, at equilibrium, the concentration of ionized acid is also quite small.

To find % ionization, we use the equation: % ionization = (ionized concentration/initial concentration) × 100 percent From the equation:HC9H7O4 + H2O → H3O+ + C9H7O4¯Initial Concentration: 0.593 M Concentration of H3O+ ion (ionized concentration): x Concentration of C9H7O4¯ ion (ionized concentration): x The amount of HC9H7O4 that ionizes is equal to the amount of H3O+ ions formed, which is equal to the amount of C9H7O4¯ ions formed. Thus, we can consider the equilibrium concentrations to be 0.593 - x for HC9H7O4, x for H3O+, and x for C9H7O4¯.Ka = [H3O+] [C9H7O4¯]/[HC9H7O4] Ka = (x)²/(0.593 - x) Using the quadratic formula, we can solve for x, the concentration of ionized acid. This will be approximately equal to the concentration of H3O+.Ka = (x)²/(0.593 - x)0.784 x 10¯5 = (x)²/(0.593 - x)x = 0.000053 M Therefore, ionized concentration = 0.000053 M So, % ionization = (ionized concentration/initial concentration) × 100% = (0.000053/0.593) × 100%= 0.784 %Therefore, the percent ionization of a 0.593 M solution of acetylsalicylic acid (aspirin), HC9H7O4, is 0.784 percent.

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Answer: Pb 2+ (aq)+ 2CL- (aq) -----> PbCl2 (s)

Explanation: According to the precipitation rules,  Cl- is soluble exept if one of the cations are Pb 2+.