How many millilitres of 0.200 M NaOH are required to completely neutralize 5.00 mL of 0.100 M H3 PO4 ?

The volume of the alcohol can be obtained as 79.9 mL.

We know that there are many different unit of concentration. The unit of concentration that we are going to focus on here is the volume per volume percent. This has to do with the volume of solute in a given volume of the solvent.

Thus we have;

Volume solution = 355 mL

Volume percent of the alcohol =  22.5%

Actual volume of the alcohol = x

We now have;

Volume percent = Volume of the alcohol (x)/volume of the solution * 100/1

22.5 = x/355 * 100/1

22.5 =  100x/355

x = 22.5 * 355/100

x = 79.9 mL

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Missing parts;

A mouthwash contains 22.5% (v/v) alcohol. If the bottle of mouthwash contains 355 mL, what is the volume, in milliliters, of alcohol

2156.25 mL of the 44% solution are needed.  A homogeneous mixture has a uniform composition throughout and is also called a solution.

What is Mixture?

A mixture is a combination of two or more substances that are physically combined but not chemically bonded to each other. In a mixture, each substance retains its own chemical identity and properties, and can be separated from the mixture using physical means, such as filtration, evaporation, or distillation. Mixtures can be homogeneous or heterogeneous.

Let x be the volume (in mL) of the 44% solution needed.

Since we want to end up with 3 L (or 3000 mL) of 35% solution, we can set up the following equation to solve for x:

0.12(3000 - x) + 0.44x = 0.35(3000)

This equation balances the amount of solute (i.e. the active ingredient) in the mixture before and after mixing.

Simplifying and solving for x, we get:

360 - 0.12x + 0.44x = 1050

0.32x = 690

x = 2156.25 mL (rounded to the nearest hundredth)

Therefore, 2156.25 mL of the 44% solution are needed.

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The term molarity is an important method which is used to calculate the concentration of a solution. It is also known as the term molar concentration. Here molarity is given as 0.500 M.

The concept molarity is defined as the number of moles of the solute present per liter of the solution. It is represented as 'M' and its unit is mol / L. Let us take the volume as 20 L.

Then molarity = Number of moles / Volume in Liters

n = 20 × 0.500 = 10

Molar concentration of 'Ca' = 10 / 20 = 0.5

Molar concentration of 'Cl' = 2 × 0.5 = 1

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The partial charges on each fluorine atom are negative. Option B) The central O atom is the correct answer. Option B

The partial charges in a molecule are determined by the electronegativity values of the atoms involved. Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. In the case of \(F_2O\), fluorine (F) is more electronegative than oxygen.

Fluorine is the most electronegative element on the periodic table, meaning it has a high ability to attract electrons. Oxygen is also relatively electronegative but less so than fluorine. When fluorine atoms bond with oxygen, the shared electrons will be pulled more towards the fluorine atoms, creating a polar covalent bond.

In \(F_2O\), each fluorine atom will pull the shared electrons towards itself, resulting in a higher electron density around the fluorine atoms. This creates a region of partial negative charge around the fluorine atoms.

Conversely, the oxygen atom will have a region of lower electron density and, therefore, a partial positive charge. This is because the shared electrons spend more time around the fluorine atoms due to their higher electronegativity.

Option B

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Answer:

This means that the volume of the liquid the pipet can deliver is 10 mL with a tolerance of 0.02 mL. The tolerance is based on whether the actual volume is within 0.02 mL of 10 mL.

Explanation:

10 mL - 0.02 mL = 9.98 mL

10 mL - 0.02 mL = 10.02 mL

The volume of the liquid is between 9.98 and 10.02 mL.

Answer:

the community needs to work alongside with government and religious organisations. the communities work on both profile and non profile work incase of human rights violations. they also force the government to take necessary action

Positively charged ions move from a salt bridge to the anode compartment in a galvanic cell, whereas negatively charged ions move from a salt bridge to a cathode compartment.

Galvanic or voltaic cells are two types of electrochemical devices that use chemical energy from spontaneous redox reactions to produce electricity. Convectional cell An electrochemical device known as a voltaic cell uses chemical reactions to produce electricity.

The electrical energy generated by the transfer of electrons during a redox reaction is used by galvanic cells to carry out practical electrical operations. Separating the oxidation / reduction half-reactions and connecting them with a wire makes it possible to collect the electron flow since the electrons must pass through the wire in order to move between the two half-reactions.

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According to the information we can infer that the amount of mcg of conjugated estrogen the patient would take in 30 days would be 37,500 mcg.

The patient is prescribed Premarin, which contains 1.25 mg of conjugated estrogen per day. The prescription is to be taken for 60 days.

To calculate the total amount of conjugated estrogen taken in 30 days, we can use the following calculation:

Since 1 mg is equivalent to 1,000 mcg, we can convert the total amount from milligrams to micrograms:

According to the information we can conclude the patient would take 37,500 mcg of conjugated estrogen in 30 days.

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Answer: The high temperature raises the volume of air inside the ball according to Charles's law because this law describes how a gas will behave at constant pressure.

Answer:

D. The high temperature raises the volume of air inside the ball according to Charles's law because this law describes how a gas will behave at constant pressure.

Explanation:

I took the exam

The observation that compound A releases H2 gas while compound B does not when treated with Na metal can be explained by considering the structural differences between the two compounds and their ability to undergo specific reactions.

Compound A and compound B both have the molecular formula C₂H₆O, which indicates that they both contain two carbon atoms, six hydrogen atoms, and one oxygen atom. However, the difference lies in the arrangement of these atoms within the molecules. One possible explanation for the observed difference is that compound A is an alcohol, specifically ethanol (CH₃CH₂OH), while compound B is an ether, such as dimethyl ether (CH₃OCH₃). The presence of the hydroxyl group (-OH) in ethanol enables it to undergo a reaction with sodium metal, known as the metal-acid reaction. In this reaction, the metal displaces the hydrogen from the hydroxyl group, forming sodium ethoxide (CH₃CH₂ONa) and releasing hydrogen gas (H₂). On the other hand, ethers like dimethyl ether lack the hydroxyl group and therefore cannot undergo the metal-acid reaction. Consequently, when compound B is treated with sodium metal, no hydrogen gas is released. The ability of compound A to release hydrogen gas while compound B does not when treated with sodium metal can be attributed to the presence of a hydroxyl group in compound A (ethanol), enabling it to undergo a metal-acid reaction, whereas compound B (dimethyl ether) lacks the necessary functional group and thus does not undergo this reaction.

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Answer:: We're asked to find the molar concentration of the NaCl solution given some titration data.

Explanation:

Answer:

answer = -0.95

Explanation:

The oxidation number of Ag in Ag2O is +1.

In Ag2O, there are two silver atoms (Ag) and one oxygen atom (O). Oxygen is known to have an oxidation number of -2 in most compounds. Since the compound is neutral, the sum of the oxidation numbers of all the atoms must equal zero.

Therefore, the oxidation numbers of the two silver atoms must add up to +2 to balance out the -2 oxidation number of the oxygen atom. Since there are two silver atoms, each silver atom must have an oxidation number of +1 to yield a total oxidation number of +2 for the compound.

In Ag2O, the silver atoms lose one electron each to form Ag+ ions. This results in an oxidation number of +1 for each silver atom. The oxygen atom gains two electrons from the silver atoms to achieve a stable octet configuration, resulting in an oxidation number of -2 for the oxygen atom. The compound Ag2O is formed through the transfer of electrons, with each silver atom exhibiting an oxidation number of +1.

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As combustion always result into the formation of water, the other type of reactions that may result into formation of water are Acid-Base Neutralization Reactions and Hydrogen and Oxygen Reaction.

Acid-Base Neutralization Reactions:

A neutralisation reaction is a chemical process in which an acid and a base combine to produce salt and water as the end products.

H⁺ ions and OH⁻ ions combine to generate water during a neutralisation reaction. Acid-base neutralisation is the most common type of neutralisation reaction.

Example: Formation of Sodium Chloride (Common Salt):

HCl + NaOH → NaCl + H₂O

Hydrogen and Oxygen Reaction:

Water vapour is created when hydrogen gas (H₂) and oxygen gas (O₂) are combined directly. This reaction produces a lot of heat and releases a lot of energy.

Example: 2 H₂ + O₂ → 2 H₂O

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Answer:

The answer would be D as no chemical change is occuring.

Explanation:

Answer:

D. Dissolving salt in water.

Explanation:

No chemical change is actually occurring when salt is added to water

The equation C2H4(g) + H2(g) + C2H6(g) → Caco3(s) + Cao(s) + CO2(g) shows an increase in entropy due to the formation of a gas as a product. Option A

In this equation, the reactants on the left-hand side consist of gases (C2H4 and H2), while the products on the right-hand side include a solid (Caco3) and a gas (CO2).

When a reaction involves a change from gaseous to solid or liquid states, there is typically a decrease in entropy because the particles become more ordered and constrained in the solid or liquid phase.

Conversely, when a reaction involves the formation of gases, there is generally an increase in entropy because gases have higher degrees of molecular motion and greater freedom of movement compared to solids or liquids.

In the given equation, the reactants include three gaseous compounds (C2H4, H2, and C2H6), and one of the products is a gas (CO2). Therefore, the overall entropy of the system increases during this reaction.

The equation Fe(s) + S(s) → FeS(s) does not show an increase in entropy. Both the reactants (Fe and S) and the product (FeS) are solids. Since solids have lower entropy compared to gases or liquids, the entropy of the system does not increase in this reaction. Option A

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The pressure of a given mass of an ideal gas is inversely proportional to volume at constant temperature, according to Boyle's law.

P1V1 = P2V2 = (600mmhg*100.0ml = 800mmhg*V2)

The volume of the gas at a pressure of 800 mm Hg is 75 mL.

This empirical relationship, which Robert Boyle, a scientist, first proposed in 1662, argues that, under constant temperature, the pressure (p) of a given amount of gas changes inversely with its volume (v); in equation form, this means that pv = k, a constant.

According to Boyle's Law, as pressure lowers, gas volume grows. According to Charles' Law, when the temperature rises, the volume of the gas also rises.

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Hey there!:

Molar mass N₂ = 28.0134 g/mol

28.0134 g ------------------- 22.4 L (at STP )

mass  N₂ -------------------- 50.0 L

mass N₂ = 50.0 x 28.0134 / 22.4

mass N₂ = 1400.67 / 22.4

mass N₂ = 62.529 g

Hope this helps!

(A) The volume of Carbon tetrachloride is 96.2 ml

(B) The density of Solid object is 3.89 g/mL

(C) The mass of water in grams is 425 gram

(A)

Molar mass of Carbon tetrachloride is 153g/mol

Density is given as 1.59g/ml

Density = mass/volume

1.59 = 153/volume

volume = 153/1.59 = 96.2 ml

Hence, volume of Carbon tetrachloride is 96.2 ml

(B)

The experiment applies Archimedes' principle, according to which the volume of a liquid that an object displaces is equal to the volume of the thing itself.

As a result, the object's displacement of volume is:

18.9 mL - 43.9 mL = 25.0 mL

The item has a capacity of 18.9 mL.

The mass divided by the volume gives the density, so:

D = m / V = 73.5 g /18.9 mL

D = 3.89 g/mL

Hence, density of Solid object is 3.89 g/mL

(C)

Volume of water in beaker = 425 ml

Density of water is 1g/ml

Density = Mass/Volume

Mass = Density x Volume = 425 x 1 = 425 gram

Hence, mass of water in grams is 425 gram

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1. The final temperature is 768 Kelvin.

2. the final pressure is 29.1 atm

Temperature is described as a physical quantity that expresses the hotness of matter or radiation.

We will use the equations of the adiabatic process:

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

P11 ^ = P22

P2 = P1 (12)^

1.00 atm = (1/ 0.09)^ 7/5

P2 = 29.1 atm.

2 = 1 (1/2)−1

T2 = = 293 K ( 1 / 0.09)^ (7/5)^−1

T2 = 768 kelvin

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Answer:

ammonia is a common base

Answer: Trigonal Pyrimidal

Explanation: Just took test

HAZWOPER training and certification recognize:

The correct option is both A and C

HAZWOPER (Hazardous Waste Operations and Emergency Response) training and certification recognize that a large number of victims (as much as 80%) in hazardous waste incidents or emergencies will self-present or be self-referred for medical treatment.

Additionally, HAZWOPER training acknowledges that victims may use any entrance they can access at a hospital, not just the emergency department entrance.

This is because individuals affected by hazardous materials may arrive at different areas of the hospital seeking medical assistance.

Therefore, option d. Both A and C are correct statements regarding the recognition of HAZWOPER training and certification.

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Answer:Answer: 0.2 g/mL.

Explanation: Explanation: Density: Density is equal to the mass of substance divided by its volume. Units: SI unit of density is Kg/m3.

0.1 mol of sodium hydroxide (NaOH) would react exactly with 7.5 g of the diprotic acid \(H_{2}\)A.

What is Molar Mass?

Molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol). It is calculated by adding up the atomic masses of all the atoms in a molecule or the formula mass of all the ions in an ionic compound.

The balanced chemical equation for the reaction between diprotic acid, \(H_{2}\)A, and sodium hydroxide, NaOH, can be represented as follows:

2\(H_{2}\)A + 2 NaOH -> \(Na_{2}\)A + 2 \(H_{2}\)O

From the balanced equation, we can see that 2 moles of \(H_{2}\)A react with 2 moles of NaOH to produce 1 mole of \(Na_{2}\)A and 2 moles of water (\(H_{2}\)O).

First, we need to calculate the number of moles of \(H_{2}\)A in 7.5g using the formula:

moles = mass / molar mass

moles of \(H_{2}\)A = 7.5g / 150 g/mol = 0.05 mol

Since diprotic acid, \(H_{2}\)A, reacts in a 1:2 ratio with NaOH, we need to multiply the moles of \(H_{2}\)A by 2 to determine the moles of NaOH required for complete reaction:

Moles of NaOH = 2 * Moles of \(H_{2}\)A

Moles of NaOH = 2 * 0.05 mol

Moles of NaOH = 0.1 mol

0.1 mol of sodium hydroxide (NaOH) would react exactly with 7.5 g of the diprotic acid \(H_{2}\)A.

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The number of atoms : 33

Given

The chemical formula: 3Mg(OH₄)₂

Required

The number of atoms

Solution

The chemical formula of a compound shows the mole ratio and the number of each of its constituent components (number of atoms)

Usually, the ratio of the elements in a compound is indicated by their subscript number after the monoatomic or polyatomic in the compound

While the coefficient in front of the compound indicates the number of molecules

In the chemical formula 3Mg (OH₄) ₂, there are 3 molecules of Mg (OH₄) ₂, so the number of atoms of the elements:

Mg = 3

O = 3 x 2 = 6

H = 3 x 4 x 2 = 24

Total atoms = 3 + 6 + 24 = 33

Explanation:

hi sorry I wasn't able to find Nz on periodic Table may be just missed it so just find mr of Nz and times it by moles hope this helps

ANSWER

STEP-BY-STEP EXPLANATION:

Given parameters

• The grams of the total sample = 40 grams

• The gram of calcium in the sample = 8 grams

Recall that, the sample contains calcium and bromine

Hence, we need to calculate the mass of bromine in the sample.

Sample = Calcium + bromine

40 = 8 + bromine

Substract 8 from both sides

40 - 8 = 8 - 8 + bromine

Bromine = 32 grams

Hence, the mass of bromine in the sample is 32 grams

The next thing is to find the number of moles of each element

Let the molar mass of each element be;

• Calcium = 40 g/mol

• Bromine = 79.904 g/mol

From the mole calculated, the lowest number of moles is 0.2 which is the calcium element.

The next thing is to divide through by 0.2 mole which is the lowest mole

Ca Br

0.2 0.40

0.2 0.2

1 2

Hence, the empirical formula is given below as

When tin is mixed with chlorine, a synthesis reaction occurs and the product of this reaction is SnCl₄ which is denoted as option C.

This is referred to as a reaction that occur when two different atoms or molecules interact to form a different molecule or compound under certain conditions.

In this scenario, we were told that the reactants are tin and chlorine and we can deduce that they react to form tin (IV) chloride which is denoted as SnCl₄ and the equation of the reaction can be seen below thereby making it the correct choice.

Sn + 2Cl₂ -> SnCl₄

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