When a force sets an object in motion, the moving object has kinetic energy.
True or false

The crystal field splitting energy for this transition metal complex is 1.95 kJ/mol.

The crystal field splitting energy, ∆₀, can be calculated using the equation ∆₀ = hc/λ, where h is Planck's constant, c is the speed of light, and λ is the wavelength of maximum absorbance.

Using the given maximum absorbance of 610.7 nm, we can convert this to meters: 610.7 nm = 6.107×10⁻⁷ m. We can then substitute this value into the equation to obtain:

∆₀ = (6.626×10⁻³⁴ J s)(2.998×10⁸ m/s)/(6.107×10⁻⁷ m) = 3.236×10⁻¹⁹ J

To convert this to units of kJ/mol, we need to multiply by Avogadro's constant (6.022×10²³ mol⁻¹) and divide by 1000:

∆₀ = (3.236×10⁻¹⁹ J)(6.022×10²³ mol⁻¹)/1000 = 1.95 kJ/mol

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Gases generated in a chemical reactions are sometimes collected by displacement of water, hydrogen gas can be quantitatively collected by this method.

One of the four basic states of matter is gas. The other three are plasma, liquid, and solid. Individual atoms may make up a pure gas (such as a noble gas such neon), elementary molecules comprised of a single kind of atom (such as oxygen), or complex molecules made of a number of different elements.

A variety different pure gases can be found in a gas mixture like air. Gases generated in a chemical reactions are sometimes collected by displacement of water, hydrogen gas can be quantitatively collected by this method.

Therefore, hydrogen gas can be quantitatively collected by this method.

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Molarity of the solution with 6.72 g of NaCl dissolved in 2.14 liters is 0.051 mol per liter.

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Answer:

It's c

Explanation:

Because I've checked

Answer: B.) Ionic

Explanation: It is B because it is the type of bond that is most likely being presented in row 1.

A covalent bond is most likely being represented in row 1. Hence, option D is correct.

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

The covalent bond is formed by the mutual sharing of valence electrons of one atom with the valence electrons of another atom. The covalent bond formed may be a single bond, a double bond or a triple bond.

If two electrons are shared between two atoms, then the single covalent bond is formed.

If four electrons are shared between two atoms, then a double bond is formed.

If six electrons are shared between two atoms, then a triple bond is formed.

Covalent network compounds are not malleable or ductile as the covalent bonds do not allow the atoms to move.

Hence, option D is correct.

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Answer:

Explanation:

Cu(s) + 2Ag+  ======> Cu^(2+) + Ag(s)

Notice what happened. Silver started out as an ion. It took on 2 electrons that were donated by the copper.

The silver then became a solid ppte. This equation wil take on much more meaning when you take up oxidation and reduction. Until then, you need only know who gave up elections and who took them up.

Answer:

ok here is you answer

Explanation:

Blood is a liquid because it is composed of cells and plasma that are suspended in a liquid state and can easily flow through the circulatory system, delivering oxygen and nutrients to cells and removing waste products.

Answer: 1/ms=8mk

Explanation:

Answer:

C- transforemed or changed

Explanation:

matter can be changed by application of heat or cold

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Answer:

B

Explanation:

Among all the answers soil is the only renewable resource.

Both coal and natural gas are a non-renewable resource

Even though sunlight can be used for solar panels as a renewable resource but when the sun dies out from burning there is no replacement for it.

Hence, only answer is soil

Answer:

Yes it is a colligative Property

Explanation:

There is freezing point depression, boiling point elevation, Osmotic Pressure, Vapor Pressure Lowering

Answer: The Variable is "M"

Explanation: Control the Metal Powder

In salt hydrolysis, the conjugate bases of weak acids yield basic solutions, while the conjugate acids of weak bases yield acidic solutions. This phenomenon occurs because the hydrolysis of a salt produces either hydroxide ions or hydronium ions, depending on the nature of the salt.

For example, when the salt of a weak acid and a strong base is hydrolyzed, the conjugate base of the weak acid is formed, which acts as a weak base. This weak base can then react with water to produce hydroxide ions, leading to an increase in the pH of the solution and a basic solution. Conversely, when the salt of a weak base and a strong acid is hydrolyzed, the conjugate acid of the weak base is formed, which acts as a weak acid. This weak acid can then react with water to produce hydronium ions, leading to a decrease in the pH of the solution and an acidic solution.

It is important to note that the strength of the acid or base will also influence the pH of the solution, as stronger acids and bases will have a greater impact on the pH. Additionally, the concentration of the salt and the water will also impact the degree of hydrolysis and the resulting pH of the solution.

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Answer:

the valency of sodium is one because sodium loses 1 electron to become stable

Answer: 2.85 moles of flourine

Explanation:

find the atomic/molar mass of flourine on your periodic table.

multiply the given mass (54.1g) by (1 mole of flourine/atomic mass of flourine)

54.1g flourine * 1mole of flourine/18.998g flourine

(g flourine) in the above equation cancel each other.

54.1/18.998 = 2.85 mole of flourine

Answer:

metallic bond, force that holds atoms together in a metallic substance. The atoms that the electrons leave behind become positive ions, and the interaction between such ions and valence electrons gives rise to the cohesive or binding force that holds the metallic crystal together.

Explanation:

Answer:

Metallic bond, force that holds atoms together in a metallic substance. Such a solid consists of closely packed atoms. In most cases, the outermost electron shell of each of the metal atoms overlaps with a large number of neighboring atoms. As a consequence, the valence electrons continually move from one atom to another and are not associated with any specific pair of atoms. In short, the valence electrons in metals, unlike those in covalently bonded substances, are nonlocalized, capable of wandering relatively freely throughout the entire crystal. The atoms that the electrons leave behind become positive ions, and the interaction between such ions and valence electrons gives rise to the cohesive or binding force that holds the metallic crystal together.

Explanation:

The answer is (a) -236 kJ. To calculate delta G under the given conditions, we will use the equation:
ΔG = ΔG° + RTlnQ

Where:
ΔG° = standard free energy change (-198 kJ in this case)
R = gas constant (8.314 J/mol K)
T = temperature in Kelvin (25 + 273 = 298 K)
Q = reaction quotient
To calculate Q, we need to determine the partial pressures of each species. We are given the partial pressures of NO, O3, NO2, and O2:

PNO = 1.0*10^-6 atm
PO3 = 1.0*10^-7 atm
PNO2 = 3.0*10^-6 atm
PO2 = 0.20 atm
Q = (PNO2)(PO2) / (PNO)(PO3)
Plugging in the values, we get:
Q = (3.0*10^-6)(0.20) / (1.0*10^-6)(1.0*10^-7) = 600
Now we can solve for ΔG:
ΔG = -198 kJ + (8.314 J/mol K)(298 K)ln(600)
ΔG = -236 kJ

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The ratio is approximately 2, the molecular formula of the compound is approximately 2 times the empirical formula:\(C4H12As\).

To determine the molecular formula of the compound, we need to find the empirical formula first. The empirical formula represents the simplest, most reduced ratio of atoms in the compound.

We are given the percentages of carbon (C), hydrogen (H), and arsenic (As) in the compound:

C: 22.88%

H: 5.76%

As: 71.36%

To find the empirical formula, we can assume we have 100g of the compound, which allows us to convert the percentages into grams. Then, we can calculate the moles of each element using their molar masses.

C: (22.88 g / 12.01 g/mol) = 1.906 mol

H: (5.76 g / 1.008 g/mol) = 5.714 mol

As: (71.36 g / 74.92 g/mol) = 0.953 mol

Next, we need to find the smallest whole-number ratio of moles. In this case, the smallest ratio is approximately 2:6:1. So, the empirical formula of the compound is \(C2H6As\).

To determine the molecular formula, we need to find the ratio between the molar mass of the empirical formula and the given molar mass of 210 g/mol.

Empirical formula molar mass = (2 * 12.01 g/mol) + (6 * 1.008 g/mol) + (1 * 74.92 g/mol) = 104.16 g/mol

Molecular formula ratio = 210 g/mol / 104.16 g/mol ≈ 2

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1. The Earth revolves around the Sun. Theory: This is a scientific theory, which is an explanation supported by a large body of evidence that explains how a natural phenomenon or phenomenon works.

A theory is an explanation or principle that is based on observations, experiments, and logical reasoning. It is an organized system of ideas, concepts, and principles intended to explain how something works or why something happens. Theories are used to explain and predict phenomena and can be used to develop hypotheses, which can then be tested to gain a better understanding of the natural or social world. Theories can be used to understand and explain a wide variety of phenomena in the natural and social sciences, including the behavior of particles, the functioning of the human body, and the social dynamics of large groups of people.

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A solid is a state of matter in which particles are held together in a fixed position and are very close together. These particles do not move at a rapid rate, but instead vibrate in place.

This means that a solid takes the shape of its container, and also fills the volume of the container. The interactions between particles in a solid are very strong, allowing them to stay in their fixed positions. This is in contrast to the interactions between particles in a gas, which are very weak, allowing them to move freely throughout the container. A property of a solid is that it has a definite shape and volume. This means that a solid has a fixed shape and size, and it cannot be changed easily. Additionally, solids are rigid, meaning that they cannot be compressed or stretched. They also have a high density, meaning that they have a high mass per unit volume.

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When investigating whether or not the substance dibromoethane (ethylene dibromide) is carcinogenic, we follow the survival history of 161 white employees of 2 factories who were exposed to dibromoethane.

Among them, we observe 7 cancer deaths in the period 1940-1975. On the other hand, the mean number of cases over that period in that general population is expected to be 5.8. Do those 7 cases provide a reason to consider the substance as .Yes, the seven cases provide a reason to consider the substance dibromoethane as carcinogenic.

Since the number of cancer deaths observed in the 161 white employees exposed to dibromoethane is 7 which is greater than the expected cancer deaths in the general population, which is 5.8. Therefore, the excess cases may suggest that dibromoethane has some carcinogenic potential.

Hence, we can consider dibromoethane as carcinogenic.

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Answer:

AgCl

Explanation:

Got correct on E2020

Answer:

B: AgCl

Source: trust me bro

The correct answer is d) 5.6. Exchangeable H+ ions are those that can be displaced from soil particles by other cations, such as K+.

In this case, the soil was extracted with a 1M KCl solution, meaning that any exchangeable H+ ions would be replaced by K+ ions in the solution.

The fact that the exchangeable H+ concentration in the solution was measured at 2.3 micromolar tells us that the pH of the solution is around 5.6.

This is because pH is a measure of the concentration of H+ ions in a solution, with lower pH values indicating higher H+ concentrations.

Therefore, a soil extracted with a 1M KCl solution and measured to have an exchangeable H+ concentration of 2.3 micromolar would have a pH of approximately 5.6.

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The molality of the following solution can be calculated by using the formula given below:

molality (m) = moles of solute / mass of solvent (kg)

Therefore, we can calculate the molality of 3.7 M NaCl as follows:

The molar mass of NaCl = 23 + 35.5 = 58.5 g/mol

Number of moles of NaCl = (3.7 mol / L) × 1 L = 3.7 mol

Mass of NaCl = 3.7 mol × 58.5 g/mol = 216.45 g

Density of the solution = 1.00 g/mL

Volume of the solution = mass of solution / density of solution

= 216.45 g / 1.00 g/mL

= 216.45 mL

= 0.21645 L

Mass of solvent = mass of solution - mass of solute

= 216.45 g - 216.45 g

= 0 g (As NaCl is solute)

Therefore,

molality = 3.7 mol / 0.000 kg (because mass of solvent is 0.000 kg) = undefined.

Note: Molality cannot be defined for a solution with a mass of solvent that is zero or very close to zero. Therefore, the main answer is undefined.

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Answer:

(o) Al + NaOH + H2O -NaAlO2 + H2.

When aluminum oxide Al 2 O 3 reacts with sodium hydroxide solution, it forms sodium aluminate and water H 2 O . This reaction takes place at a temperature of 900 - 1100 ° C

The standard enthalpy change (ΔHf∘) for the reaction of calcium hydroxide with carbon dioxide to form calcium carbonate and water is −171.3 kJ/mol.

The enthalpy change (ΔH) for a reaction can be calculated using the standard enthalpy of formation (ΔHf∘) of the reactants and products.

The equation for the reaction is:

Ca(OH)2(s) + CO2(g) → CaCO3(s) + H2O(l)

The standard enthalpy change (ΔHf∘) for this reaction can be calculated as follows:

ΔHf∘ = ΔHf∘ (CaCO3) + ΔHf∘ (H2O) − ΔHf∘ (Ca(OH)2) − ΔHf∘ (CO2)

Plugging in the values from the table,

ΔHf∘ = −1207.0 kJ/mol + −285.8 kJ/mol − (−986.1 kJ/mol) − (−393.5 kJ/mol)

= −171.3 kJ/mol

Therefore, the standard enthalpy change (ΔHf∘) for the reaction of calcium hydroxide with carbon dioxide to form calcium carbonate and water is −171.3 kJ/mol.

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Answer: d=2.70 g/mL

I think

The formula of the hydrated salt is \(Fe(NO3)3 · 9H2O,\)and its name is iron (III) nitrate nonahydrate.

To find the formula and name of the hydrated salt, we need to use the information given about the mass of the hydrated and anhydrous salt.

Let the formula of the hydrated salt be \(Fe(NO3)3 · xH2O,\) where x is the number of water molecules per formula unit. We can use the given masses to find x.

Mass of hydrated salt = 1.658 g

Mass of anhydrous salt = 0.991 g

Mass of water lost = 1.658 g - 0.991 g = 0.667 g

The molar mass of Fe(NO3)3 is 241.86 g/mol, and the molar mass of H2O is 18.02 g/mol. We can use these values to find the number of moles of each component.

Number of moles of Fe(NO3)3 = 0.991 g / 241.86 g/mol = 0.0041 mol

Number of moles of H2O = 0.667 g / 18.02 g/mol = 0.037 mol

Now we can use the ratio of moles to find x.

x = number of moles of H2O / number of moles of Fe(NO3)3

x = 0.037 mol / 0.0041 mol

x = 9

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