T/F: the number of lone pairs that are on the coordinating atom can help determine what type of bonds the ligand can form with a metal atom.

Answer:

Reaction is already balanced

Explanation:

The equation in reaction 1 is given as;

CH3COOH + NaHCO3 --> CO2 + H2O +  Na+   +  CH3COO-

The reaction is already balanced. This is because the umber of atoms of elements in the reactant is equal to that of the products

Carbon

Reactant = 2 + 1 = 3

Product = 2 + 2 = 3

Hydrogen

Reactant = 3 + 1 + 1 = 5

Product = 2 + 3 = 5

Oxygen

Reactant = 2 + 3 = 5

Product = 2 +1 + 2 = 5

Sodium

Reactant = 1

Product = 1

Answer:

The reaction is already balanced because the number of atoms in the reactant is equal to the products

Explanation:

Answer:

Melting point is a intensive property and Intensive properties can be used to help identify a sample because these characteristics do not depend on the amount of sample, nor do they change according to conditions.

Explanation:

Answer:

I would say B. melting point but then again all of them are very important exept for state, because even though state is important it only determines if it's a gas liquid or solid! so Mass and volume are Important, but volume also just determines 1 thing, how big it is, so mass or melting point, which mass just tells you how much space it takes up, so I'd say B. Melting point

Answer:

True

Explanation:

The entropy of a system denoted by S is a thermodynamic function that increases in value when there are more ways to arrange the particles in the system. Some spontaneous chemical processes are entropy driven. An increase in entropy is said to drive the dissolution of ionic salts along with the evaporation of water are related to the spreading out of energy.

The entropy of a system can be taken as a measure of disorder of a system. In a spontaneous chemical process, the entropy of the universe is said to increase. ΔSunivu>0. Making the answer true.

The wavelength of the wave having a frequency of 5.00×10¹⁴ s⁻¹ is 6×10⁻⁷ m

We know that the velocity is related to wavelength and frequency according to the following formula:

Velocity (v) = wavelength (λ) × frequency (f)

v = λf

Thus, with the above formula, we can determine the wavelength. Details below:

Velocity (v) = wavelength (λ) × frequency (f)

3×10⁸ = wavelength × 5.00×10¹⁴

Divide both sides by 5.00×10¹⁴

Wavelength = 3×10⁸ / 5.00×10¹⁴

Wavelength = 6×10⁻⁷ m

Therforee, the wavelength is 6×10⁻⁷ m

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Answer:

capital organisation and management of natural resources and information policy

Answer: Water is polar and salts form ions in solution.

Explanation:

According to the concept of “Like dissolves like”, the polar solutes dissolve in polar solvents, and non-polar solutes dissolve in non-polar solvents.

Water being a polar solvent due to large electronegativity difference between hydrogen and oxygen is able to interact with the ions of the solute.

As water molecules are also polar in nature. So, oppositely charged ions interact with each other and dissolve in it.

Water can form hydrogen bonds with most of the substances and hence dissolve them . Thus water is considered as a universal solvent.

Answer: Water is polar, and salts form ions in solution

Explanation: Took MYA

Answer:2097.5998675091255

Explanation:

Lithium alkali metals has the highest electronegativity. An atom's ability to attract the electrons of a bond grows with electronegativity, a feature of an atom.

The electrons in a covalent bond are shared evenly by two bound atoms if their electronegativity levels are the same. Typically, the more electronegative atom attracts the electrons in a chemical bond more so than the other one. Consequently, a polar covalent bond is created. The electrons aren't shared at all if the electronegativity values are significantly dissimilar. Ionic bonds are created when one atom essentially steals the other atom's bond electrons.

Over a period, electronegativity often increases as it moves from left to right. The noble gases frequently defy this rule.

Moving down on the periodic table often results in a decrease in electronegativity.

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NH3 has the least molar mass, it'll diffuse faster than the others.

What is Molar Mass?

We all wish to know how many molecules are there in a given material. Atoms and molecules are very small in both size and mass. One sample mole's weight is the molar mass. To get the molar mass, connect the atomic masses (atomic weights) of each atom in the molecule. Using the mass listed in the Periodic Table or Atomic Weight Table, determine the atomic mass for each element.

Typically, molar mass is stated in either grammes (g) or kilogrammes (kg) (kg).

The diffusion rate of a particular gas is inversely proportional to the square root of the molar mass of that gas.

As for molar masses go,

NH3= 17gm/mol

O2= 32 gm/mol

N2= 28gm/mol

CO2= 44gm/mol

NH3 has the least molar mass, it'll diffuse faster than the others.

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Answer:

\(3.5\) pill need to taken for completing dosage of \(875\) mg

Explanation:

Total dosage of medicine to be taken in a day

\(= 2 * 875 \\= 1750\)mg

Total weight of one pill \(= 250\) mg

Number of pills required is equal to total dosage of medicine divided by the weight of one pill.

Hence,

Number of pills

\(= \frac{875}{250} \\= \frac{175}{50} \\= \frac{35}{10} \\= 3.5\)

The given water-insoluble compound is discovered to be soluble in 10% NaOH. Out of the given two substances, CH₃(CH₂)₈CH₂-OH is most likely to be the compound.

Option B is correct .

A water-insoluble compound is discovered to be soluble in 10% NaOH. This means that the compound is a weakly acidic or non-acidic compound because it dissolves in a strong base like NaOH.

Only weakly acidic or non-acidic compounds dissolve in a strong base. Alcohols are not acidic, but phenols are acidic. Hence, the given water-insoluble compound is an alcohol. Now, we need to determine which of the given alcohol is soluble in NaOH.

The CH₃(CH₂)₈CH₂-OH alcohol has a long nonpolar alkyl chain. Alcohols with long nonpolar alkyl chains are less soluble in water than alcohols with small alkyl chains.

However, NaOH is a polar solvent. The long nonpolar alkyl chain is not soluble in water but is soluble in NaOH because NaOH is a polar solvent.Therefore, CH₃(CH₂)₈CH₂-OH is most likely to be the compound.

Incomplete question :

A water-insoluble compound is discovered to be soluble in 10% NaOH. Which of the following substances is most likely to be the compound?

a. CH₃CH₂-OH

b. CH₃(CH₂)₈CH2₂-OH

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0.112 L CO₂ is the volume of carbon dioxide.

Glucose ferments decompose to form the ethanol and carbon dioxide.

Balanced equation :  C₆H₁₂O₆  ----> 2C₂H₅OH (aq) + 2CO₂ (g)

By using formula, M= m/n

Where,

M⇒ Molar mass

m⇒ Mass of a substance (in grams)

n⇒ Number of moles of a substance

The molar mass (M) of C₆H₁₂O₆ (aq) ⇒180.156 g/mol

Calculating the moles(n) of C₆H₁₂O₆(aq) .

n ⇒ m/M

m ⇒ mass ⇒ 0.9 C₆H₁₂O₆

M ⇒ molar mass

n ⇒180.156g/mol C₆H₁₂O₆

n ⇒ 0.9g C₆H₁₂O₆/ 180.156 g/mol

n⇒ 0.005 mol C₆H₁₂O₆

Calculating moles(m) of CO₂ :

m⇒0.005 mol CaCO₃× (1 mol CO₂/1 mol  C₆H₁₂O₆)

m⇒ 0.005 mol CO₂

At STP of 273.15 K (0°C) and 1 atm, the molar volume of a gas is 22.414 L/mol.

Calculating volume of CO₂ :

Multiply the mole CO₂ by the molar volume to get the volume of CO₂ in liters.

⇒ 0.005 mol CO₂× 22.414 L/mol

⇒ 0.112 L CO₂  to three significant figures

Converting volume CO₂ in L to mL.

⇒ 0.112 L CO₂ × 1000 mL/L

⇒ 112.07 mL CO₂

Volume of CO₂ ⇒ 0.112 L CO₂  or 112.07 mL CO₂

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Both option C (NH3(aq) with HClO3(aq)) and option D (LiOH(aq) with HClO4(aq)) will result in a titration curve with an equivalence point with pH > 7.

This is because the strong acid (HClO3 and HClO4) will be neutralized by the weak base (NH3 and LiOH) resulting in a basic solution at the equivalence point. The other options (A and B) will result in an acidic solution at the equivalence point since the strong acid will fully ionize and neutralize the weak base. It's important to note that the pH at the equivalence point depends on the strength of the acid and base used in the titration. NH3(aq) with HClO3(aq). This is because NH3 is a weak base and HClO3 is a strong acid. At the equivalence point, the weak base NH3 will react with the strong acid HClO3, forming NH4+ and ClO3- ions. The NH4+ ion can partially hydrolyze water, producing OH- ions, which increases the pH above 7. The other reactions involve strong acids with strong bases or weak acids with strong bases, resulting in pH levels around 7 or lower.

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Answer:

defined the objective of the lab, showing critical thinking skills.

Answer:
To calculate the number of atoms of H and C in 0.160 mol of C6H14O, we need to first determine the number of moles of each element present in C6H14O.

The molecular formula of C6H14O shows that there are 6 carbon atoms, 14 hydrogen atoms, and 1 oxygen atom in each molecule of C6H14O.

The molar mass of C6H14O can be calculated as:

Molar mass of C6H14O = (6 × atomic mass of C) + (14 × atomic mass of H) + (1 × atomic mass of O)

= (6 × 12.01 g/mol) + (14 × 1.01 g/mol) + (1 × 16.00 g/mol)

= 86.18 g/mol

Therefore, 0.160 mol of C6H14O has a mass of:

Mass = molar mass × number of moles

= 86.18 g/mol × 0.160 mol

= 13.79 g

Now we can calculate the number of atoms of H and C in 0.160 mol of C6H14O.

Number of atoms of H:

Number of moles of H = 14 × 0.160 mol = 2.24 mol

Number of atoms of H = 2.24 mol × Avogadro's number

= 2.24 mol × 6.022 × 10^23/mol

= 1.35 × 10^24 atoms of H

Therefore, there are 1.35 × 10^24 atoms of hydrogen in 0.160 mol of C6H14O.

Number of atoms of C:

Number of moles of C = 6 × 0.160 mol = 0.96 mol

Number of atoms of C = 0.96 mol × Avogadro's number

= 0.96 mol × 6.022 × 10^23/mol

= 5.78 × 10^23 atoms of C

Therefore, there are 5.78 × 10^23 atoms of carbon in 0.160 mol of C6H14O.

Explanation:

Experiment 2 will have a faster initial rate of formation of CO2 compared to Experiment 1.

Looking at the experimental conditions, we can see that Experiment 2 has a higher concentration of the solid CaCO3 and a higher temperature compared to Experiment 1. Both of these factors will increase the rate of the reaction according to the collision theory. A higher concentration of CaCO3 will result in more collisions between the reactant particles, while a higher temperature will increase the kinetic energy of the particles, making them move faster and collide more frequently. Therefore, Experiment 2 will have a faster initial rate of formation of CO2 than Experiment 1. The fact that both experiments use finely powdered samples of the solid and 50.0 ml of HCl(aq) is irrelevant to the comparison of their initial rates, as these factors do not vary between the experiments.

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The ways to  make a skit are:

In skit making, one can start by coming up with humorous concepts for your skit. Write out your scenario, practice it, and then perform it in front of an audience or record it. Then Continue to create fresh drafts.

Note that one can ask someone you trust's opinion should see your sketch. Then make a note of what people found amusing and not amusing.

Therefore, skit  is seen as short comedy show that can be performed by second graders.

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When determining the net change in atmospheric \(CO_2\) concentration between 140,000 years ago and 125,000 years ago, Carbon dioxide levels in the atmosphere have fallen by roughly 20 parts per million (ppm).

The correct answer is 20 ppm.

\(CO_2\) is one of the most crucial greenhouse gases, and it's crucial to understand the Earth's climate change. For the past 800,000 years, the Antarctic ice core records have been used to estimate atmospheric \(CO_2\) levels. Antarctica has many snowfalls.

Each year, the snow traps tiny bubbles of air containing various greenhouse gases, including \(CO_2\). The ice sheet preserves these bubbles, enabling scientists to determine the greenhouse gas composition of the atmosphere at the time they were trapped.

During the last ice age, between 140,000 and 125,000 years ago, the atmosphere's carbon dioxide levels decreased by about 20 parts per million (ppm). At the same time, the Earth's temperature dropped by about 10 degrees Celsius.

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There are 6 attomoles of epinephrine in each vesicle.

The number of molecules per vesicle is 3.613 * 10¹⁵ molecules

The volume of the vesicle is 3.35 * 10⁻¹⁸ m³ or 3.35 * 10⁻¹⁵ L

The molar concentration of epinephrine in the vesicle is 2.99 M.

The number of attomoles of epinephrine in each vesicle is determined as follows:

Number of attomoles per vesicle = (150 fmol / 2.5 x 10⁴) / 10⁹

Number of attomoles per vesicle = 6 amol

(b) To find the number of molecules of epinephrine in each vesicle is determined as follows:

Molecular weight of epinephrine = 183.2 g/mol

Based on Avogadro's number:

1 mole of epinephrine = 6.022 * 10²³ molecules

1 amol of epinephrine = 6.022 * 10¹⁴ molecules

Number of molecules per vesicle = 6 * 6.022 * 10¹⁴

Number of molecules per vesicle = 3.613 * 10¹⁵ molecules

(c) The volume of a vesicle with radius r is:

r = 200 nm or 2 * 10⁻⁷ m, we get:

V = (4/3) * π * (2 * 10⁻⁷)³

V = 3.35 * 10⁻¹⁸ m³

Converting to liters:

1 L = 10⁻³ m³

The volume of the vesicle in liters will be:

V = 3.35 * 10⁻¹⁸ m³ * (1 / 10⁻³)

V = 3.35 * 10⁻¹⁵ L

(d) The molar concentration of epinephrine in the vesicle is determined using the formula below:

Molar concentration = 10 amol / 3.35 * 10⁻¹⁸ m³

Converting amol to mol:

Molar concentration = 10 * 10⁻¹⁸ mol / 3.35 * 10⁻¹⁸ m³

Molar concentration = 2.99 M

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A greenhouse gas that is exclusively anthropogenic is called CFC and CO2

The term global warming has to do with the rise in the temperature of the earth due to several factors. In other words, when we find that the temperature of the earth has been on the rise consistently in the last few decades then we can be sure that what is occurring is the green house effect.

The gas that is almost exclusively anthropogenic in green house effect is CO2 and the CFCs. The rise in the amount of CO2 and CFCs all stem from the activities of man on the earth here.

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Answer:

A physical change

Explanation:

A physical change is a form of transformation in which an element or matter changes from one material state to another. For example from solid-state to liquid state through melting. Another is crushing and freezing.

Hence in this case, when a liquid is cooled during an investigation causing it to solidify. The process is called Freezing which occurred as a result of a PHYSICAL CHANGE.

Answer: B) You are to continue heating the round-bottom flask until all liquid has been distilled.

Explanation:

Fractional distillation refers to a method that's useful for the separation of mixtures of solvents whereby there is less than 40°C in the boiling point difference.

With regards to the options given, the incorrect statement about the procedure for distillation is that you are to continue heating the round-bottom flask until all liquid has been distilled. This isn't correct.

Answer:

nah

Explanation:

Answer:

Solid: Definite shape and volume, particles vibrate in place, non-compressible

Liquid: Non-compressible, definite volume, no definite shape, particles slide past each other

Gas: Compressible, no definite shape or volume, particles slide past each other

Explanation:

Hope this helps!

Among the options, the laboratory test that would support a diagnosis of congestive heart failure is B. Troponin.

Troponin is a cardiac biomarker that is released into the bloodstream when there is damage to the heart muscle. Elevated levels of troponin in the blood are indicative of myocardial injury or infarction, including heart failure.

Congestive heart failure (CHF) is a condition characterized by the heart's inability to pump blood effectively, leading to fluid accumulation and congestion in various parts of the body. While troponin levels are primarily associated with myocardial infarction (heart attack), they can also be elevated in certain cases of heart failure.

In congestive heart failure, the heart muscle may be stressed or damaged, which can cause the release of troponin into the bloodstream. Therefore, an elevated troponin level, along with other clinical findings and diagnostic tests, can support the diagnosis of congestive heart failure.

It's worth noting that other laboratory tests and diagnostic tools, such as imaging studies (e.g., echocardiogram) and assessment of other cardiac biomarkers (e.g., B-type natriuretic peptide, brain natriuretic peptide), are often used in conjunction with troponin levels to evaluate and diagnose congestive heart failure accurately. A comprehensive clinical evaluation by a healthcare professional is necessary to make an accurate diagnosis and develop an appropriate treatment plan.

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Answer:

C

Explanation:

Neon is a noble gas, which is monoatomic.

The concentration of H₂SO₄ in the aqueous solution is approximately 0.46875 M, as calculated using the given volume of the H₂SO₄ solution, the volume of the NaOH solution at the equivalence point, and the molarity of the NaOH solution.

To determine the concentration of H₂SO₄ in the aqueous solution, we can use the concept of stoichiometry and the volume at the equivalence point.

Volume of H₂SO₄ solution = 50.0 mL = 0.0500 L

Volume of NaOH solution at equivalence point = 62.5 mL = 0.0625 L

Molarity of NaOH solution = 0.375 M

The balanced chemical equation for the reaction between H₂SO₄ and NaOH is:

H₂SO₄ + 2NaOH -> Na₂SO₄ + 2H₂O

According to the stoichiometry of the equation, we see that the molar ratio between H₂SO₄ and NaOH is 1:2. This means that one mole of H₂SO₄ reacts with two moles of NaOH.

At the equivalence point, the moles of NaOH added are equal to the moles of H₂SO₄ present in the original solution. Therefore, we can set up the equation:

(0.375 M NaOH) * (0.0625 L) = (C H₂SO₄) * (0.0500 L)

Solving for the concentration of H₂SO₄ (C H₂SO₄):

C H₂SO₄ = (0.375 M NaOH) * (0.0625 L) / (0.0500 L)

C H₂SO₄ ≈ 0.46875 M

Therefore, the concentration of H₂SO₄ is approximately 0.46875 M.

In a titration, the reaction between an acid and a base is used to determine the concentration of either the acid or the base. By measuring the volumes of the acid and base solutions and knowing their concentrations, we can use stoichiometry to determine the unknown concentration.

In this case, we know the volume and concentration of the NaOH solution and the volume of the H₂SO₄ solution at the equivalence point. By using the balanced chemical equation and the stoichiometric relationship, we can set up an equation to solve for the concentration of H₂SO₄.

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Answer:

a. 68.54 g

b. 11.67%

Explanation:

The balanced chemical equation is:

1 LIOH + 1 KCI → 1 LICI + 1 KOH

a) The molar mass of LIOH is 23.95 g/mol. So, the number of moles of LIOH used is:

22 g / 23.95 g/mol = 0.920 mol

From the balanced chemical equation, we see that 1 mole of LIOH produces 1 mole of LICI. Therefore, the theoretical yield of LICI is 0.920 mol.

The molar mass of LICI is 74.55 g/mol. So, the theoretical yield of LICI in grams is:

0.920 mol × 74.55 g/mol = 68.54 g

Therefore, the theoretical yield of LiCl is 68.54 g.

b) The actual yield of LiCl is given as 8 grams.

The percent yield is given by the formula:

percent yield = (actual yield / theoretical yield) × 100%

Substituting the actual and theoretical yields, we get:

percent yield = (8 g / 68.54 g) × 100% = 11.67%

Therefore, the percent yield of LiCl is 11.67%.

Answer:

Sodium hydroxide is very corrosive. It can cause irritation to the eyes, skin, and mucous membrane; an allergic reaction; eye and skin burns; and temporary loss of hair. Workers may be harmed from exposure to sodium hydroxide.

Explanation:

How to reduce:

Inhalation: Move victim to fresh air.

Skin Contact: Avoid direct contact

Eye Contact: Avoid direct contact

Ingestion: Have victim rinse mouth with water.

The approximate temperature of the H₂O after thermal equilibrium was reached is 23.4°C (option d).

The amount of heat absorbed by the water is given as 300.0 J. The mass of water is 50.0 g and the specific heat capacity of water is 4.2 J/g°C. Let's use the equation:

Q = m * c * ΔT

where Q is the heat absorbed, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature.

Substituting the given values, we get:

300.0 J = 50.0 g * 4.2 J/g°C * ΔT

Solving for ΔT, we get:

ΔT = 300.0 J / (50.0 g * 4.2 J/g°C) = 1.43°C

The final temperature of the water can be calculated by adding the change in temperature to the initial temperature:

Final temperature = 22.0°C + 1.43°C ≈ 23.4°C

Therefore, the approximate temperature of the H₂O after thermal equilibrium was reached is 23.4°C (option d).

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