Glenda selects express shipping for her purchase and the company bills her credit card $91. 86 for the total of the online purchase. determine if glenda has been billed correctly for her purchase. a. glenda has been billed correctly. b. glenda has not been charged enough for her purchase. c. glenda has been over charged by $3. 40 for her purchase. d. glenda has been over charged by $3. 80 for her purchase

Answer:

replacement

Explanation:

Because the No and The Ci switch but it might not be the answer but I know that they have to switch and replacement sounds like the best answer

Answer:

Oxidation

Explanation:

Hope this helps :)

Answer:

2H2O2 + NaClO → NaClO3 + 2H2O

Answer:

iron .. titanium.. nickel....aluminum... sulfur... and calcium

if 30 ml of 5.0 × 10–4 m Ca(NO₃)₂ is added to 70 ml of 2.0 × 10–4 m naf, (A) No, the precipitate will not form because the ion product is greater than Ksp.

To solve the given problem, we need to compare the ion product (IP) of CaF₂ with its solubility product constant (Ksp) to determine if a precipitate will occur.

Given information:

Volume of Ca(NO₃)₂ solution: 30 mL = 30 × 10⁻³ L

Molarity of Ca(NO₃)₂ solution: 5.0 × 10⁻⁴ M

Volume of NaF solution: 70 mL = 70 × 10⁻³ L

Molarity of NaF solution: 2.0 × 10⁻⁴ M

Ksp of CaF₂: 4.0 × 10⁻¹¹

Calculate the moles of Ca(NO₃)₂ and NaF:

Moles of Ca(NO₃)₂ = Volume of Ca(NO₃)₂ solution × Molarity of Ca(NO₃)₂ = (30 × 10⁻³ L) × (5.0 × 10⁻⁴ M)

Moles of NaF = Volume of NaF solution × Molarity of NaF = (70 × 10⁻³ L) × (2.0 × 10⁻⁴ M)

Determine the limiting reactant:

Divide the moles of each reactant by their stoichiometric coefficients to compare:

Moles of Ca(NO₃)₂ / 1 = Moles of Ca(NO₃)₂

Moles of NaF / 2 = Moles of NaF

Calculate the moles of CaF₂ formed based on the limiting reactant:

Moles of CaF₂ = Moles of limiting reactant (either Ca(NO₃)₂ or NaF) / 2

Calculate the ion product (IP) of CaF₂:

IP = [Ca²⁺] × [F⁻]²

Since the concentration of Ca²⁺ is equal to the concentration of F⁻ (from the stoichiometry), we can substitute it as [Ca²⁺] × [F⁻]² = [CaF₂]².

Compare the ion product (IP) with the solubility product constant (Ksp):

If IP > Ksp, a precipitate of CaF₂ will form. If IP ≤ Ksp, no precipitate will form.

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Complete question :

If 30 mL of 5.0 x 10-4 M Ca(NO3)2 are added to 70 mL of 2.0 x 10-4 M NaF, will a precipitate occur?

(Ksp of CaF2 = 4.0 x 10-11)

A. No, because the ion product is greater than Ksp .

B. Yes, because the ion product is less than Ksp .

C. No, because the ion product is less than Ksp .

D. Not enough information is given.

E. Yes, because the ion product is greater than Ksp .

Oxygen gets oxidized and potassium and chlorine get reduced. The number of electrons moving to have a balanced reaction is 6.

The number of allocated elements in a chemical combination is termed an oxidation number. The oxidation number is generally the count of the number of electrons that a molecule or atom shares, loses, or gains during bond formation.

The given chemical equation will be

\(\rm 2K ^+ + 2Cl^+ + 2O_3^{2-} = 2KClO_3\)

In this reaction, oxygen gets oxidized and potassium and chlorine get reduced.

The number of electrons moving to have a balanced reaction will be

Number of electron = 2 × 3 = 6

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Answer:

Answer down below

Explanation:

Answer:

1 A

3 main types of bond are

Ionic bond ( formed due to complete transfer of electron between atoms(

Covalent bond ( formed by mutual sharing of electron)

Metalic bond ( present in the metals due to mobile electrons)

1 B bond in CaO is ionic bond formation in attached image

1 C hydrogen bond with nitrogen is covelent NH3 ammonia is formed because a bond between two non metals is expected to be covalent

More their electronegativity difference between hydrogen and nitrogen is less than 1.7 that makes it covalent

Explanation:

Answer: This looks tough

Explanation:

Yes, it is the right response. Although the elements are imaginary, they resemble actual elements .Nomenclature is an organism name system used in biological classification.

The Latin words nomen (name) and calare (to call) are the source of the word nomenclature. Both the Latin word nomenclatura and the English word nomenclator, which also denotes a source or broadcaster of names, relate to a list of names.

Nomenclature is an organism name system used in biological classification. Genus & species names, two Latinized nouns drawn from numerous sources, serve as indicators of the species whereby the creature belongs.

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Answer:

B. 87%

Explanation:

First, we calculate the molecular mass of magnesium bromide (MgBr2) as follows;

MgBr2 = 24.3 + 79.9(2)

= 184.1g/mol

Since 1 atom of bromine contains 79.9g, then the mass of two atoms of bromine (Br2) is 79.9 × 2 = 159.8g

Hence, the percentage of bromine (Br2) in MgBr2 is calculated as follows:

% mass of Br2 = mass of Br2/ molecular mass of MgBr2 × 100

% mass of bromine = 159.8/184.1 × 100

% mass of bromine = 0.8680 × 100

% mass of bromine = 86.8%

Approximately, % mass of bromine is 87%

To determine the number of moles of base needed to neutralize 0.25g of acetyl salicylic acid, we first need to calculate the number of moles of acetyl salicylic acid in 0.25g.

The formula mass of acetyl salicylic acid (C9H8O4) can be calculated as: C = 9 x 12.01 = 108.09  H = 8 x 1.01 = 8.08 O = 4 x 16.00 = 64.00 Formula mass = 108.09 + 8.08 + 64.00 = 180.17 g/mol To find the number of moles in 0.25g, we can use the formula:moles = mass / molar mass moles = 0.25g / 180.17 g/mol = 0.00139 mol

Since the mole ratio of H to OH- is equal, we need an equal number of moles of base to neutralize the acid. Therefore, we need 0.00139 moles of base to neutralize 0.25g of acetyl salicylic acid.

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Answer: I forgor

Explanation:

Answer:

The correct answer is 639 L H₂

Explanation:

We use the ideal gas equation:

We have the following data:

n = 28.3 mol

T= 297 K

P= 1.08 atm

R= 0.082 L.atm/K.mol (gas constant)

We introduce the data in the gas equation to calculate the volume (V):

PV=nRT

⇒V =nRT/P = (28.3 mol x 0.082 L.atm/K.mol x 297 K)/(1.08 atm) = 638.2 L ≅ 639 L

Therefore, the correct option is  639 L H₂

Answer:

639 L H2

Explanation:

took the quiz

ur welcome

According to the website that I use to figure out things about science or chemistry and that stuff... The answer is 3.5 L KBr x 1.7 mol KBr solute / 1 L KBr solution x 1 mol Cl2 / 2 mol KBr x 70.9 g Cl2 / 1 mol Cl2 = 211 g Cl2.

A mutation from alanine to glycine can often lead to a very unstable protein. The reason for this instability can be attributed to the differences in the side chains of these two amino acids.

Alanine has a methyl (\(CH_3\)) side chain, while glycine has a hydrogen (H) side chain. The presence of the methyl group in alanine allows for more stable hydrophobic interactions within the protein structure, which contribute to the overall stability of the protein. In contrast, glycine's hydrogen side chain is unable to form these stabilizing hydrophobic interactions.

When a mutation occurs and alanine is replaced by glycine, the loss of the hydrophobic interactions can result in a less stable protein structure. This can lead to improper folding or increased susceptibility to denaturation, ultimately causing the protein to be unstable.

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if the formula of an oxide of element X is XO, the formula of the nitride of X would be X3N2. So the correct answer is option D: X3N2.

Oxides are chemical compounds that contain at least one oxygen atom as well as at least one other element. Most of the earth's crust consists of oxides. Oxides are formed when elements are oxidized by oxygen in the air.

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Answer:

the variables are changing order. They still wquil the same they just in a different order.

The major 1,2- and 1,4-addition products formed when a diene reacts with HBr are as follows:

1. For the 1,2-addition product: The diene reacts with HBr, and one of the double bonds undergoes addition with the hydrogen of HBr at the 1,2-position. This results in the formation of a monosubstituted alkyl bromide.

2. For the 1,4-addition product: The diene reacts with HBr, and the two double bonds undergo a concerted reaction with HBr. This leads to the formation of a cyclohexane ring, with the bromine atom attached at the 1,4-position.

In the 1,2-addition product, the HBr adds directly to one of the double bonds, resulting in a monosubstituted alkyl bromide. This is known as the Markovnikov addition. On the other hand, in the 1,4-addition product, the diene undergoes a concerted reaction, where both double bonds react simultaneously with HBr.

This results in the formation of a cyclohexane ring with the bromine atom attached at the 1,4-position. The 1,4-addition product is known as the anti-Markovnikov addition. The selectivity of these additions is determined by the stability of the carbocation intermediate formed during the reaction.

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The property of matter that is conserved in chemical reactions and shown by balanced equations is known as the Law of Conservation of Mass. According to this law, mass can neither be created nor destroyed in a chemical reaction; it can only be transformed from one form to another.For instance, when two substances are combined, they react and form a new substance.

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Answer:

During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.

Explanation:

it is the full concept. I think it will help you.

The Diels-Alder mechanism among a diene and a dienophile is a concerted reaction, because of this that bond breaking occurs simultaneously with bond forming.

To help the mechanism be triumphant, the diene have to have an electron liberating organization and the dienophile have to have an electron taking flight organization.

A concerted reaction is a form of chemical response where all of the bond-forming and bond-breaking steps arise concurrently, in a single step. In other phrases, all of the reactants come collectively and react to shape the products with none intermediate steps.

Concerted reactions also are referred to as pericyclic reactions due to the fact they contain the formation and breaking of bonds in cyclic transition states. these reactions comply with a specific set of rules referred to as the Woodward-Hoffmann guidelines, which describe the allowed and forbidden modes of overlap among the orbitals of the reactants and products. These reactions are often utilized in organic synthesis to create complicated molecules with excessive stereoselectivity and regioselectivity.

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Complete Question:

The Diels-Alder mechanism between a diene and a dienophile is _____, which means that bond breaking happens _____ as bond forming.

To help the mechanism succeed, the diene should have an _____ group and the dienophile should have an ______ group.

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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Answer:

4

Explanation:

Equilibrium is a dynamic state in which the forward and reverse reaction rates are equal; the quantities of the reactants and products are not necessarily equal.

(You got this keep up the good work). :)

The rate of the forward reaction equals the rate of the reverse reaction in the equilibrium reaction.

A state of balance between opposing forces or actions.

Equilibrium is when the rate of the forward reaction equals the rate of the reverse reaction.

All reactant and product concentrations are constant at equilibrium.

Equilibrium is a dynamic state in which the forward and reverse reaction rates are equal; the quantities of the reactants and products are not necessarily equal.

Hence, option D is correct.

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The two alkyl bromides at the end are 2-bromobutane and 3-bromobutane.

The two alkyl bromides at the end are 2-bromobutane and 3-bromobutane. When 1-butene reacts with Hydrogen bromide, the reaction proceeds and inculcate 2-bromobutane and 3-bromobutane. A Chemical Reaction is a process that occurs when two or more molecules collide with the right orientation and sufficient force to form a new product. In this process breaking and forming bonds between atoms takes place. New atoms formed by making of new bonds and breaking of old bonds in the reaction.  Compounds that interact to produce new compounds are called reactants whereas the newly formed compounds are called products.

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Blood pressure may rise as a result of sodium bicarbonate. Avoid sodium bicarbonate if you already have high blood pressure.

Baking soda can be lethal if consumed in excess. The powder's high sodium concentration is to blame for this. When someone consumes an excessive amount of sodium bicarbonate, their body will attempt to restore the proper level of salt by bringing water into their digestive tract. Vomiting and diarrhea are brought on by this.

The body requires bicarbonate, a chemical known as a base, to help maintain a healthy acid-base (pH) balance. This equilibrium keeps your body from becoming overly acidic, which can lead to a variety of health issues. The kidneys and lungs remove extra acid from the blood, maintaining a normal blood pH.

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The given acid, we can substitute the Ka and [HA] to solve for the [H+] concentration at equilibrium \([H+] = 2 \times 10^{-6}M\)

Equilibrium is a state of balance or stability of a system. It is the state in which the forces that act on the system are balanced, and the system is not subjected to any external force. Equilibrium is a dynamic state, meaning that the system is in constant flux and is always changing in response to its environment.

At equilibrium, the [H+] concentration of a monoprotic acid (HA) is determined by its acid dissociation constant (Ka). The Ka is a measure of the strength of an acid and is related to the [H+] concentration at equilibrium by the following equation:
Ka = [H⁺][A⁻]/[HA]
For the given acid, Ka = 2 x 10⁻⁵. We also know that the initial HA concentration is 0.1M.
We can rearrange the Ka equation to solve for [H⁺]:
[H⁺] = Ka x [HA]/[A⁻]
Since [A⁻] = [HA] (since they are in equilibrium), we can simplify the equation to:
[H⁺] = Ka x [HA]
For the given acid, we can substitute the Ka and [HA] to solve for the [H⁺] concentration at equilibrium:
[H⁺] = (2 x 10⁻⁵) x (0.1M)
\([H+] = 2 \times 10^{-6}M\)

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If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.

What is pressure?

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Various units are used to express pressure. Some of these are units of force divided by units of area. For example, the SI unit of pressure, Pascal (Pa), is 1 Newton per square meter (N/m2). Similarly, pounds force per square inch (psi, symbol lbf/in2) is the traditional unit of pressure in imperial and US systems. Pressure can also be expressed as standard atmospheric pressure. Atmospheric pressure (atm) is equal to this pressure and torr is defined as 1/760 of this. Manometric units such as centimeters of water, millimeters of mercury, and inches of mercury are used to express pressure as the height of a particular liquid column within a manometer.

If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.

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The effect of changing the temperature of the nitric acid on the rate of reaction. (Include measuring the volume of carbon dioxide gas produced) is Rate of reaction increases.

When we increase the temperature of the reaction the rate of reaction also increases. With the increase of the temperature of the nitric acid HNO₃, the rate of the reaction also increases as the molecule moves faster. Arrhenius equation given as :'

k = Ae^(Ea / RT)

or, ln k = -Ea /RT + ln A

where,

k = rate constant

A = Arrhenius constant

Ea = activation energy

R = gas constant

T = temperature

Thus, The effect of changing the temperature of the nitric acid on the rate of reaction. (Include measuring the volume of carbon dioxide gas produced) is Rate of reaction increases.

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Diamond mineral is the hardest known substance in nature,  its resistance to scratching and is measured using the Mohs scale

The hardness of a mineral is defined as its resistance to scratching and is measured using the Mohs scale, a relative scale that ranges from 1 (softest) to 10 (hardest). Diamond has a hardness of 10, the highest rating on the Mohs scale, making it the hardest substance known to exist in nature. This hardness gives diamond its exceptional durability, making it ideal for use in jewelry and other applications where scratch resistance is important. The hardness of diamond also makes it difficult to cut, shape, and polish, which has led to the development of specialized cutting and polishing techniques to work with this unique mineral.

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The molar concentration of ammonia is 2.976M.

Molarity of HCl = number of moles/ volume

Number of moles = Molarity of Hcl * volume

Hence the number of moles of ammonia =\(14.88 * 10^{-3}\)

From question volume of ammonia =\(5 * 10^{-3}\)

Molarity = \(14.88 * 10^{-3}/5 * 10^{-3}\)

Molarity  \(=2.976\)

What is meant by molar concentration?

Molar concentration is the most effective way of describing a solute concentration in a solution. Molarity is described as the total number of moles of solute dissolved per liter of solution,i.e., M = mol/L.

How do you calculate the molar concentration?

To calculate the Molar Concentration, we will find the molar concentration by dividing the moles by the liters of water used in the solution.

Thus, the molar concentration of ammonia is 2.976M

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The classification is:

Organic substances known as amino acids have both amino and carboxylic acid functional groups. Only 22 of the hundreds of amino acids found in nature are alpha amino acids, which are by far the most common and make up proteins. Only 22 alpha amino acids are found in the genetic code. Alpha-, beta-, gamma-, or delta-amino acids can be categorized according to where the main structural functional groups are located; further classifications relate to polarity, ionization, and the kind of side chain group (aliphatic, acyclic, aromatic, containing hydroxyl or sulfur, etc.). Amino acid residues are the second-largest component of human muscles and other tissues, behind water, in the form of proteins.

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