how might a spectrophotometer help determine the molarity of a solution with an unknown concentration?

Answer:

Explanation:

The changing of substances to other substances by the breaking of bonds in reactants and the formation of bonds in products is the definition of chemical change or reaction.

Chemical reactions or cahnges are the transformation of pure substances, compounds or elements, into other substances by the breaking of some bonds adn the formation of other bonds.

The chemical reactions are represented by chemical equations with the reactants in the left side and the products in the right side, connected by  the use of arrows.

For example, the chemical equation CH₄ (g) + O₂(g) → CO₂(g) + H₂O(g) represents the combustion reaction (chemical change) of methane (CH₄) with oxygen (O₂).

The products of the reaction are carbon dioxide (CO₂) and water (H₂O) which are the new substances formed by breaking the chemical bonds in CH₄ and O₂ and the formation of the bonds in the new molecules (CO₂ and H₂O).

Chemical equation: CH₄ (g) + O₂(g)  →  CO₂(g) + H₂O(g)

                                    ↑           ↑               ↑             ↑

                                 -- reactants --         --- products --

The reactants have been transformed into different chemical compounds, so  this is a chemical changle.

Chemical reactions involve the changing of substances through the breaking and formation of bonds. Reactants are the starting substances, while products are the resulting substances. The direction of the reaction is indicated by an arrow.

Chemical reactions occur when two or more atoms bond together to form molecules or when bonded atoms are broken apart. The substances used in a chemical reaction are called the reactants (usually found on the left side of a chemical equation), and the substances produced by the reaction are known as the products (usually found on the right side of a chemical equation). An arrow is typically drawn between the reactants and products to indicate the direction of the chemical reaction; this direction is not always a 'one-way street.'

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Answer:

4

Explanation:

Protein synthesis involves two major steps:

Transcription involves the formation of a nucleotide sequence complementary to the DNA molecule, with the pairing of a different base, Uracil, with Guanine instead of the usual Thymine base. This occurs in the nucleus of the cell, and the resulting molecule is known as the mRNA.

This mRNA is transported into the cytoplasm through the nuclear pore for the next step, translation. This is primarily accomplished by ribosomes and tRNA molecules which are present in the cytoplasm of the cell. The result of this step is the generation of a protein molecule.

Answer:

its A, C and E (1, 3, 5)

i did this on edgenuiti and it was correct =)

mark as brainliest i really need it bc if not i'll never level up i have 797/500 points

Answer:

Explanation:

Alkane

Alkene

Cycloalkane

Haloalkane

Aromatic compound

Alcohol

Thiol

Ether

Aldehyde

Ketones

Carboxylic acid

Ester

Answer:

10.1 % Carbon, 0.8 % Hydrogen and 89.1 % Chlorine.

Explanation:

The total mass of the compound is 5.34 + 0.42 + 47.08 = 52.84 g.

The percentage of carbon is:   [tex]\frac{5.34}{52.84}[/tex] × 100  = 10.1 %

The percentage of hydrogen is:  [tex]\frac{0.42}{52.84}[/tex] × 100 = 0.8 %

The percentage if chlorine is:  [tex]\frac{47.08}{52.84}[/tex] × 100 = 89.1 %

The percent composition of the compound is approximately 10.10% carbon, 0.797% hydrogen, and 89.10% chlorine.

To determine the percent composition of the compound, one must calculate the mass percentage of each element present in the sample. The mass percentage of an element is calculated by dividing the mass of that element by the total mass of the compound and then multiplying by 100%.

 First, we need to find the total mass of the compound by summing the mass of all the elements present:

 Total mass = Mass of carbon + Mass of hydrogen + Mass of chlorine

Total mass = 5.34 g + 0.42 g + 47.08 g

Total mass = 52.84 g

 Now, we can calculate the mass percentage of each element:

 Percent composition of carbon:

[tex]\( \frac{\text{Mass of carbon}}{\text{Total mass}} \times 100\% = \frac{5.34 \text{ g}}{52.84 \text{ g}} \times 100\% \approx 10.10\% \)[/tex]

 Percent composition of hydrogen:

[tex]\( \frac{\text{Mass of hydrogen}}{\text{Total mass}} \times 100\% = \frac{0.42 \text{ g}}{52.84 \text{ g}} \times 100\% \approx 0.797\% \)[/tex]

 Percent composition of chlorine:

[tex]\( \frac{\text{Mass of chlorine}}{\text{Total mass}} \times 100\% = \frac{47.08 \text{ g}}{52.84 \text{ g}} \times 100\% \approx 89.10\% \)[/tex]

 Therefore, the percent composition of the compound is approximately 10.10% carbon, 0.797% hydrogen, and 89.10% chlorine.

Answer:

Explanation:

1) Word equation:

2) Chemical (skeleton) equation:

Include phases but do not balance it (yet). The symbology used is:

3) Balanced chemical equation:

Add the needed coefficients to make the number of atoms of each kind equal on both sides:

The chemical equation that represents hydrogen gas being bubbled through a solution of silver nitrate is: 2AgNO3(aq) + H2(g) -> 2Ag(s) + 2HNO3(aq). This is a redox reaction where silver is reduced and hydrogen is oxidized.

When hydrogen gas is bubbled through a solution of silver nitrate, a chemical reaction occurs. This can be written as a chemical equation:

2AgNO3(aq) + H2(g) -> 2Ag(s) + 2HNO3(aq)

In this equation, hydrogen gas (H2) reacts with silver nitrate (AgNO3) in the solution to form solid silver (Ag) and nitric acid (HNO3). This is a redox reaction, where silver is reduced (gains electrons) and hydrogen is oxidized (loses electrons).

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the salt is the solute (and the water is the solvent) i hope this answers your question lol

In a water and table salt solution, table salt is the solute. Sodium chloride (NaCl) dissolves in water forming spheres of hydration, and its concentration in the solution can vary.

In a solution of water and table salt, table salt is referred to as the solute. The process of making a saline water solution involves dissolving sodium chloride (NaCl), commonly known as table salt, into water, which acts as the solvent. This leads to the formation of what are known as spheres of hydration around the ions. Sodium chloride is a compound composed of the elements sodium and chlorine, and it is vital for various bodily functions, such as nerve conduction and fluid balance. Ordinary table salt has a uniform and definite composition, making it a pure substance; however, the saline solution's composition can vary depending on the amount of salt dissolved in water, so it is not considered a pure substance.

Answer:

monovalent or univalent

Explanation:

Atoms with a valency of 1 are said to be monovalent or univalent atoms. The valency of an atom is the number of electrons in its outermost shell.

Elements with a valency of 1 would readily and easily lose one electron in order to achieve a stable configuration which would resemble those of the noble gases or group O elements.

On the periodic table, elements in group one are all monovalent i.e they all have one electron in their outermost shell.

The answer is 4), see the picture

The redox equation which is correctly balanced is: 4. [tex]Br_2 + Hg \rightarrow Hg^{2+} + 2Br[/tex]

A redox reaction is also referred to as oxidation-reduction reaction and it can be defined as a type of chemical reaction in which the oxidation number of an atom of participating chemical species are changed.

In this scenario, the oxidation number of an atom of hydrogen is change from one to two. Thus, the redox equation which is correctly balanced is given by [tex]Br_2 + Hg \rightarrow Hg^{2+} + 2Br[/tex]

Read more on chemical reaction here: brainly.com/question/13750908

Answer:

[tex]\boxed{\text{12.011 u}}[/tex]

Explanation:

You calculate the weighted average of the atomic masses.

That is, you multiply the atomic mass of each isotope by a number representing its relative importance (e.g.., its percent of the total).

Set up a table for easy calculation:

[tex]\begin{array}{ccrcr}\textbf{Atom} & \textbf{Mass/u} &\textbf{Percent} & \textbf{Calculation}& \textbf{Result/u}\\^{12}\text{C}& 12.000 & 98.892 & 12.000 \times 0.988 92 & 11.867\\^{13}\text{C}& 13.003 & 1.108 & 13.003 \times 0.011 08 & 0.144 \\& & & \text{TOTAL} = &\textbf{12.011}\\\end{array}\\\\\text{The average atomic mass of C is }\boxed{\textbf{12.011 u}}[/tex]

Answer:

How about this?

Explanation:

(1) Halogenation of an alkane

Reaction with Br₂ in the presence of UV light to give bromocyclopentane.

(2) Dehydrohalogenation

Reaction with hot alcoholic KOH to give cyclopentene.

(3) Allylic bromination

Reaction with N-bromosuccinimide and a drop of HBr(aq) gives

3-bromocyclopentene.

A three-step synthesis of 3-bromocyclopentene from cyclopentane is as follows:

(1) Halogenation of an alkane

(2) Dehydrohalogenation

(3) Allylic bromination

Generally, halogenation is the reaction of a halogen with an alkane in which the introduction of halogen atoms occurs into the organic molecule by an addition reaction or by a substitution reaction.

(1) Halogenation of an alkane

(2) Dehydrohalogenation

(3) Allylic bromination

Hence, the three steps are halogenation, dehydrohalogenation, and allylic bromination.

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This is a single replacement reaction involving halogens

Answer:

Non-metal

Explanation:

Molecular compounds are formed through covalent bonds. Covalent bonds occur between non-metals only and they form what we call molecules, hence the name molecular compound.

An example of a molecular compound is carbon monoxide or CO. Carbon is a non-metal and oxygen is a non-metal, so you know that they form a covalent bond.

That's the difference with ionic compounds. Ionic bonds form ionic bonds and these bonds occur between a metal and a non-metal.

Binary molecular compounds are made of two nonmetallic elements and have specific naming conventions such as prefixes to denote the number of atoms.

Binary molecular compounds are composed of two nonmetallic elements. They are named using a specific nomenclature that includes prefixes to indicate the number of atoms of each element present in the compound. For example, carbon dioxide, CO₂, is a binary molecular compound consisting of one carbon atom and two oxygen atoms.

Answer:

5 moles

Explanation:

This reaction (in the question) is a combustion reaction.

A combustion reaction is a reaction in which a substance (in this case an organic compound) is burnt in excess oxygen to produce carbon dioxide and water.

From the equation in the question, it can be deduced that the moles of the products are in the ratio 1:2 for CO₂ and H₂O respectively. Hence, when 10 moles of H₂O is produced, 5 moles of CO₂ will be produced.

1:2      (from the equation)

5:10   (for the answer)  ⇔ which is still the same as 1:2

The correct graph should start at the top left of the plane. It should look like a diagonal line heading down towards the bottom right.

Whenever you have a graph moving at a steady rate, it will be linear (or straight/diagonal). Depending on how the graph is changing will determine which corner you start and end on.

Answer:

the graph should look like this

Explanation:

Answer:

2 HCl(aq) + Zn(s) = ZnCl2(s) + H2(g)

Single Replacement Reaction

1) B) continuous direct.

2) B) oscillator.

3) C) Bismuth.

6) I dont know this one sorry :/

8) B) The electric potential (volts) divided by the current (amperes) equals the resistance (ohms).

11) D) 30 V

13) A) Each of the two segments of the original bar magnet will have a north and south pole.

16) C) Shortening the conductor.

Answer:

The half-life of a radioactive substance is the time the substance takes to be reduced by half of its initial amount as a consequence of decay.

Explanation:

Answer:

C)  0.75 mol.

Explanation:

So, The molar concentration of sucrose in a can of soda is 0.375 M means that: every 1.0 L of sucrose contains 0.375 mol of sucrose.

∴ 2 liter bottle of soda of the same concentration contains (2 * 0.375 mol = 0.75 mol) of sucrose.

Thus, the right choice is: C)  0.75 mol.

Answer:

Explanation:

The concentration is a measure of how much solute is present in certain amount of solvent or solution. There are many quantitative expressions for the concentration. Some of those expressions are: percentage, molarity, molality, molar fraction, among others.

This table shows the expressions for some concentration measures, showing the amounts compared.

Concentration                         amounts compared in form of ratio

Percentage, mass/mass         (mass of solute / mass of solution) × 100  

Percentage, vol./vol.                (vol. of solue / vol. of solution) × 100

Molarity                                     (moles of solute / liters of solution)

Molality                                      (moles of solute / Kg of solvent)

Answer:

The answer is C. Fusion.

Answer:

c. Fusion

Explanation:

Answer:

Hydrogen bonds

Explanation:

Hydrogen bonds are bonds formed in polar molecules in which an hydrogen atom is directly joined to a highly electronegative atom such as oxygen or nitrogen or fluorine.

A hydrogen bond is just an electrostatic attraction between a hydrogen atom of one molecule and the electronegative atom of a neighboring molecule.

Methanol has a formula of CH₃OH and the hydrogen bond is between the H and O.

Liquid methanol exhibits hydrogen bonding, dipole-dipole interactions, and dispersion forces. The primary intermolecular force is hydrogen bonding due to the -OH group present in methanol molecules. These forces contribute to methanol's relatively high boiling point.

Liquid methanol exhibits several types of intermolecular forces. The primary intermolecular force in methanol is hydrogen bonding.

Methanol molecules contain an -OH group, where the hydrogen atom is bonded to a highly electronegative oxygen atom.

This allows each methanol molecule to form hydrogen bonds with other methanol molecules. Additionally, methanol exhibits dipole-dipole interactions due to its polar nature.

Lastly, dispersion forces (also known as London dispersion forces) are present in all molecular substances, including methanol, although they are generally weaker compared to the other two types of forces.

Understanding these intermolecular forces helps explain why methanol has a relatively high boiling point compared to non-polar substances of similar molecular weight.

Answer:

Explanation:

Assume 100% ionization:

1) 0.100 M solution K₂SO₄

This means, that you have to find which of the choices is a solution that contains the same 0.300 M ion concentration.

2) 0.0800 M Na₂CO₃

This is not equal to 0.300 M, so this solution would not contain the same total concentration as a 0.100 M solution of K₂SO₄, and is not the right answer.

3)  0.100 M NaCl

This is not equal to 0.300 M ion, so not a correct option.

4) 0.0750 M Na₃PO₄

Hence, this ion concentration is equal to the ion concentration of a 0.100 M solution of K₂SO₄, and is the correct choice.

5)  0.0500 M NaOH

Not equal to 0.300 M, so wrong choice.

A 0.100 M solution of K₂SO₄ has the same total ion concentration as a 0.0750 M solution of Na₃PO₄, both resulting in 0.300 M of ions.

K₂SO₄ dissociates into 2K⁺ and (SO₄)²⁻. Thus, a 0.100 M solution of K₂SO₄ produces 0.200 M K⁺ (2 x 0.100 M) and 0.100 M (SO₄)₂⁻, resulting in a total ion concentration of 0.300 M.

Let’s analyze the other solutions:

The correct answer is 0.0750 M Na₃PO₄, as it also produces a total ion concentration of 0.300 M.

The pressure of gas in your lungs is inversely proportionate to the volume in your lungs.

The description that accurately describes Boyle's law is the pressure of gas in your lungs is inversely proportional to the volume in your lungs. Option C is correct.

Boyle's law states that at a constant temperature, the pressure of a gas is inversely proportional to its volume. This means that if the pressure of a gas increases, the volume of the gas will decrease, and vice versa.

In the lungs, the pressure of the air is determined by the amount of air that is in the lungs. When you breathe in, the volume of your lungs increases, which decreases the pressure of the air in your lungs. When you breathe out, the volume of your lungs decreases, which increases the pressure of the air in your lungs.

Boyle's law is an important principle in the study of gases and is used in many different applications, such as scuba diving and meteorology. Option C is correct.

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Answer:

The volume will decrease.

Explanation:

According to Charles' Law, the volume of a gas is directly proportional to its temperature.

V = kT

Thus, if T decreases, V decreases.

Explanation:

So,when balloon filled with helium gas was placed in lower temperature we will observe that the volume of the helium gas inside the helium will decrease due to which size of the balloon will also get decreased.

This is because volume is directly proportional to the temperature of the gas at constant pressure and number of moles. And this law is known as Charles law of

[tex]V\propto T[/tex]    (At constant pressure and number of moles)

Answer: B- electrons, A- periods, B- groups

Answer: The correct answer is Option A, Option A and Option B.

Explanation:

Elements in a periodic table are distributed in 7 Periods and 18 Groups.

The elements are distributed on the basis of increasing atomic numbers. Atomic number is defined as the number of protons that are present in an element.

Thus, the elements in the periodic table are distributed based on the distribution of protons.

The elements are arranged in vertical columns known as Groups and in horizontal rows known as Periods.

Hence, the correct answer is Option A, Option A and Option B.

Answer:

Energy

Explanation:

A sugar group would be used for carbohydrates or nucleic acids. An adenosine group would be used in ATP formation if I recall correct. And disaccharides are just two monosaccharides linked together, so that would also be for carbohydrates. Therefore, energy is the answer.

Answer:

2) at least one multiple carbon-carbon bond.

Explanation:

So, A molecule of an unsaturated hydrocarbon must have 2) at least one multiple carbon-carbon bond.

HCl + NaOH -> NaCl + H2O

reactants: hydrochloric acid HCl

sodium hydroxide NaOh

products: sodium chloride (table salt) NaCl

dihydrogen monoxide (water)

H2O