Which of these statements best answers the question: What is art?

Answer:

Before the equivalence point, conductivity is decreasing. After the equivalence point, conductivity is increasing

Explanation:

In solution H2SO3 produce H+ ions and SO3²⁻ ions. In the same way, NaOH produce Na⁺ and OH⁻ ions. The conductivity of a solution is directly proportional to the concentration of ions in a solution. During titration, you are adding more NaOH (That is, more Na⁺ and OH⁻ ions). But each moles of OH⁻ reacts with H⁺ ion producing H₂O. That means the moles of Na⁺ that you are adding = Moles of H⁺ are been consumed. The concentration of ions remains approximately constant. But, H⁺ ion conducts better than Na⁺ ion. That means before the equivalence point, conductivity is decreasing. But after the equivalence point you will add OH- ions in excess increasing ion concentration increasing the conductivity:

After equivalence point, conductivity is increasing.

Answer:

electron pair geometry - octahedral

molecular geometry - square pyramidal

bond angle - < 90 degrees

Explanation:

According to Valence Shell Electron Pair Repulsion Theory (VSEPR), The shapes of molecules depend on the number of electron pairs on the outermost shell of the central atom in the molecule. Recall that electron pairs are always positioned as far apart in space as possible to minimize repulsion.

For a molecule in sp3d2 hybridization, the expected electron domain geometry is octahedral. However, the presence of a lone pair in the molecule distorts the electron pair geometry away from the expected octahedral shape giving a molecular geometry of  square pyramidal and decreases the bond angle less than the expected 90 degrees.

So when something is boiling it is moving faster meaning the molecules are more spread out and not condense like a solid

So the answer is the 2nd set

Answer:

a) 0.099 L

b) 9.9

Explanation:

Now, given the equation for the decomposition of H2O2;

2H2O2(l) ------> 2H2O(l) + O2(g)

Mass of H2O2;

percent w/v concentration = mass/volume * 100

volume = 10.0-mL

percent w/v concentration = 3.0 percent

mass of  H2O2 = x

3 = x/ 10 * 100

30 = 100x

x = 30/100

x = 0.3 g of H2O2

Number of moles in  0.3 g of H2O2 = mass/ molar mass

Molar mass of H2O2 = 34.0147 g/mol

Number of moles in  0.3 g of H2O2 = 0.3g/34.0147 g/mol

= 0.0088 moles

From the reaction equation;

2 moles of H2O2 yields 1 mole of oxygen

0.0088 moles of H2O2 = 0.0088 * 1/2  = 0.0044 moles of oxygen

If 1 mole of oxygen occupies 22.4 L

0.0044 moles of oxygen occupies 0.0044 *  22.4/1

= 0.099 L

b) initial volume of the H2O2 solution = 10 * 10-3 L

Hence, ratio of the volume of O2 collected to the initial volume of the H2O2 solution = 0.099 L/10 * 10-3 L = 9.9

6.02 x \(10^{20\) formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

To convert formula units of MgCl₂ to moles of MgCl₂, we need to use Avogadro's number, which relates the number of formula units to the number of moles.

Avogadro's number (NA) is approximately 6.022 x 10^23 formula units per mole.

Given that we have 6.02 x 10^20 formula units of MgCl₂, we can set up a conversion factor to convert to moles:

(6.02 x 10^20 formula units MgCl₂) * (1 mol MgCl₂ / (6.022 x 10^23 formula units MgCl₂))

The formula units of MgCl₂ cancel out, and we are left with moles of MgCl₂:

(6.02 x 10^20) * (1 mol / 6.022 x 10^23) = 0.1 mol

Therefore, 6.02 x 10^20 formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

It's important to note that this conversion assumes that each formula unit of MgCl₂ represents one mole of MgCl₂. This is based on the stoichiometry of the compound, where there is one mole of MgCl₂ for every one formula unit.

Additionally, this conversion is valid for any substance, not just MgCl₂, as long as you know the value of Avogadro's number and the number of formula units or particles you have.

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Answer:

I'd pick B, because gravity acts in between all object WITHOUT contact to each other. Gravity is all around us, we make contact with certain materials we use everyday, but objects don't contact to gravity. In certain terms, scientists are still not sure the REAL meaning of gravity, just how it works.

Explanation:

Pick B.

Answer:

I'd think it'd be B, because gravity acts between all objects without making contact.

Explanation:

Exothermic refers to chemical interactions that aerobic respiration. Combustion reactions release higher energy. Endothermic refers to atoms and molecules that either use or absorb reactive power.

A chemical process known as an endothermic releases energy as heat or light. It is an endothermic reaction's opposite. Chemical equation expressed as reactants + products + energy. An reaction mechanism is one in which electricity is given off as light or warmth.

A response is deemed to be exothermic if it produces heat while also undergoing a net decrease in basic enthalpy change. Samples include those type of combustion, iron rust, including water froze. Exothermic processes are those that discharge heat and energy into the surroundings.

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Answer: 15.7 liters

Explanation: reaction is 2H2 + O2. -> 2H2O

Because all substance still are gases, volumes in

STP conditions are proportional to amount of moles.

Amount of water is same as Hydrogen. Also volume is same.

In the citric acid cycle , beginning with one of the molecule of isocitrate and ending with the fumarate, the ATP molecules can made through the substrate-level phosphorylation is one molecule.

In the citric acid cycle, the substrate level phosphorylation is the high energy of the phosphate group in the organic molecule. it transfers to the ADP to produces the ATP. it is the metabolic reaction and form the ATP molecules. The citric acid cycle is called as Krebs cycle also.

Thus, the number of ATP molecules form during the citric acid cycle that start with the one molecule of the isocitrate and end with the fumarate is the one molecule.

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Answer:

the limiting reactant is HBr

Explanation:

if you tried to make the products using 12 mol Al and 12 mol HBr, the HBr will run out first

Answer:

A

Explanation:

behavior modification

Answer:

Through gradual accumulation of sediments

Explanation:

The limiting reactant, given that 0.30 moles of BF₃ reacted with 0.90 moles of H₂ is BF₃

We'll begin by writing the balanced equation for the reaction. This is given below:

2BF₃ + 3H₂ → 2B + 6HF

From the balanced equation above,

2 moles of BF₃ reacted with 3 moles of H₂

With the above information, we shall determine the limiting reactant as follow:

From the balanced equation above,

2 moles of BF₃ reacted with 3 moles of H₂

Therefore,

0.3 mole of BF₃ will react with = (0.3 × 3) / 2 = 0.45 mole of H₂

From the above calculation, only 0.45 mole of H₂ out of 0.9 mole given, reacted with 0.3 mole of BF₃.

Thus, BF₃ is the limiting reactant

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Answer:

is there a picture or something?

Explanation:

Explanation:

Your question is incomplete please update it.

There are approximately \(2.76 * 10^{24\) ammonia molecules in the given sample.

To calculate the number of ammonia molecules in the sample, we need to use Avogadro's number and the molar mass of ammonia.

The molar mass of ammonia \((NH_3)\) can be calculated by adding up the atomic masses of nitrogen (N) and hydrogen (H):

Molar mass of \(NH_3\) = (1 x atomic mass of N) + (3 x atomic mass of H)

              = (1 x 14.01 g/mol) + (3 x 1.01 g/mol)

              = 14.01 g/mol + 3.03 g/mol

              = 17.04 g/mol

Now, we can calculate the number of moles of ammonia in the sample using the formula:

Number of moles = Mass of the sample / Molar mass

Number of moles = 78.25 g / 17.04 g/mol

              ≈ 4.5865 mol (rounded to four decimal places)

Finally, we can use Avogadro's number, which represents the number of particles (atoms, molecules, etc.) in one mole of a substance. Avogadro's number is approximately \(6.022 * 10^{23\) particles/mol.

Number of ammonia molecules = Number of moles x Avogadro's number

Number of ammonia molecules ≈ 4.5865 mol x (\(6.022 * 10^{23\) molecules/mol)

                           ≈ \(2.76 * 10^{24\) molecules (rounded to two significant figures)

Therefore, the provided sample contains roughly \(2.76 * 10^{24\) ammonia molecules.

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The number of ammonia molecules in the sample is approximately 2.764 x \(10^{24}\) molecules.

To calculate the number of ammonia molecules in a given sample, we need to use Avogadro's number and the molar mass of ammonia.

The molar mass of ammonia (NH3) is calculated as follows:

Molar mass of N = 14.01 g/mol

Molar mass of H = 1.01 g/mol

Total molar mass of NH3 = 14.01 g/mol + (3 * 1.01 g/mol) = 17.03 g/mol

Now, we can calculate the number of moles of ammonia in the sample:

Number of moles = Mass of sample / Molar mass of NH3

Number of moles = 78.25 g / 17.03 g/mol = 4.594 moles

Next, we use Avogadro's number, which states that there are 6.022 x \(10^{23}\) molecules in one mole of a substance.

Number of molecules = Number of moles * Avogadro's number

Number of molecules = 4.594 moles * 6.022 x \(10^{23}\) molecules/mol = 2.764 x \(10^{24}\) molecules

Therefore, there are approximately 2.764 x \(10^{24}\) ammonia molecules in the given sample of 78.25 g.

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Answer:A thermometer is a tool that measures temperature — how hot or cold something is. Thermometers are used to see if you have a fever or tell you how cold it is outside.

Explanation:

Answer: A Device That Measures Temperature.

Explanation:

Answer: I think the answer is C. NaCl and H2O

Explanation: I’m not sure tho

Answer:

C) - Water and a Salt

Explanation:

Because Water and a Salt are the products of a neutralization reaction between an acid and a hydroxide base.

Answer:

By going through the periodic table, we see that the Lewis electron dot diagrams of atoms will never have more than eight dots around the atomic symbol.

Explanation:

Search :)

Explanation:

A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Mixtures are physical combinations of two or more elements and/or compounds

if I'm not mistaking it would be the second option

The water molecule is formed by the covalent bonding between oxygen and hydrogen atoms. Therefore, option C is correct.

Covalent bonding is a type of chemical bonding that involves the sharing of electrons between two atoms. In covalent bonding, the two atoms share a pair of electrons to fill their outermost electron shell and form a stable molecule.

This type of bonding usually occurs between non-metal atoms, which have a high electronegativity and tend to attract electrons strongly. In a covalent bond, the shared electrons are attracted to the positively charged nuclei of both atoms, creating a strong bond.

The strength of the bond depends on the number of shared electrons and the distance between the nuclei. Covalent bonds can be either polar or nonpolar, depending on the electronegativity difference between the two atoms.

In water the bond is formed between oxygen atom and two hydrogen atoms. Hence, C is correct.

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Answer:

You have to add many things

Explanation:

for example u can add why and how also what ur point is

In the reaction;  2Mg(s) + O2(g) ------>  2MgO(s),  Mg represents the reagent magnesium.

The term chemical reaction has to do with the interaction between compounds which are called reactants to yield a new compound which is called the product.

In the reaction;  2Mg(s) + O2(g) ------>  2MgO(s),  Mg represents the reagent magnesium.

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Mechanical disintegration means breaking into small pieces (option A).

Digestion is the process occuring in the gastrointestinal tract, by which food is converted into substances that can be utilized by the body.

Digestion can, however, be mechanical/physical or chemical/enzymatical. The mechanical digestion involves the breaking down of food into smaller pieces by teeth.

Therefore, according to this question, there is no passage, however, the meaning of mechanical disintegration can be easily detected in biology.

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A. The mole fraction of isopropanol in the solution is 0.124

B. The mass percent of isopropanol is 12.4%

C. The molality of isopropanol is 7.86 M

Mole fraction = mole / total mole

Mole fraction of isopropanol = 0.470 / 3.79

Mole fraction of isopropanol = 0.124

Percentage = (mole / total mole) × 100

Percentage of isopropanol = (0.470 / 3.79) × 100

Percentage of isopropanol = 12.4%

Molality = mole / Kg of water

Molality of isopropanol = 0.47 / 0.05976

Molality of isopropanol = 7.86 M

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a) d[C₈H₁₂]/dt = k * [C₄H₆]ᵃ, b) d[C₄H₆]/dt = -k * [C₄H₆]ᵃ . c) i. Zero order: ln([C₄H₆]0/[C₄H₆]) = -kt, [C₄H₆] = [C₄H₆]0 * e⁽⁻kt⁾, ii. First order:, ln([C₄H₆]/[C₄H₆]0) = -kt, [C₄H₆] = [C₄H₆]0 * e⁽⁻kt⁾, iii. Second order:, 1/[C₄H₆]=kt + 1/[C₄H₆]0, [C₄H₆] = 1 / (kt + 1/[C₄H₆]0), d) From the graphs in part (c), the experimental rate order of this reaction is first order. e) The experimental reaction rate constant, k, can be determined from the slope of the first order plot and has units of 1/s.

The balanced chemical reaction for the Diels-Alder condensation of butadiene (C₄H₆) to yield a substituted cyclohexene (C₈H₁₂) is C₄H₆+ C₄H₆-> C₈H₁₂. The overall differential rate law is d[C₈H₁₂]/dt = k * [C₄H₆]ᵃ, where k is the reaction rate constant and a is the reaction rate order. The differential rate law for C₄H₆is d[C₄H₆]/dt = -k * [C₄H₆]ᵃ. The rate order is determined from the linearized form of the data, which shows that the reaction is first order with a reaction rate constant k having units of 1/s.

a. The balanced chemical reaction and the overall differential rate law assuming the overall reaction rate is only a function of C₄H₆ concentration (CC₄H₆), reaction rate constant (k), and reaction rate order (a) is given by:
C₄H₆ + C₄H₆ -> C₈H₁₂
d[C₈H₁₂]/dt = k * [C₄H₆]ᵃ

b. The differential rate law for C₄H₆ is given by:
d[C₄H₆]/dt = -k * [C₄H₆]ᵃ

c. The linearized form of CC₄H₆ as a function of time for each reaction order:

i. Zero order:
ln([C₄H₆]0/[C₄H₆]) = -kt
[C₄H₆] = [C₄H₆]0 * e⁽⁻kt⁾

ii. First order:
ln([C₄H₆]/[C₄H₆]0) = -kt
[C₄H₆] = [C₄H₆]0 * e⁽⁻kt⁾

iii. Second order:
1/[C₄H₆] = kt + 1/[C₄H₆]0
[C₄H₆] = 1 / (kt + 1/[C₄H₆]0)

d. From the graphs in part (c), the experimental rate order of this reaction is first order.

e. The experimental reaction rate constant, k, can be determined from the slope of the first order plot and has units of 1/s.

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