In this periodic table, which type of element is shown in green boxes?
A. Metalloids
B. Nonmetals
C. Noble gases
D. Metals

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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Answer:

24

Explanation:

the total of any 2 sides must be larger than the 3rd side. x is the 3rd side.

8 + x > 16

x > 8

16 + x > 8

x > -8

8 + 16 > x

24>x

x < 24

the second inequality tells us nothing as sides must be positive.

the third side must be between 8 and 24

The volume of the tank is approximately 130.75 m³.

To solve this problem, we need to use the concept of air and water vapor mixture. The given data includes the mass of dry air and water vapor, temperature, and total pressure. We can calculate the specific humidity, relative humidity, and volume of the tank using the following steps:

(a) Specific humidity:

The specific humidity (ω) is defined as the ratio of the mass of water vapor (m_w) to the total mass of the air-water vapor mixture (m_t):

ω = m_w / m_t

Given that the mass of water vapor is 0.17 kg and the total mass of the mixture is 15 kg + 0.17 kg = 15.17 kg, we can calculate the specific humidity:

ω = 0.17 kg / 15.17 kg ≈ 0.0112

So, the specific humidity is approximately 0.0112.

(b) Relative humidity:

Relative humidity (RH) is the ratio of the partial pressure of water vapor (P_w) to the saturation vapor pressure of water (P_ws) at the given temperature, multiplied by 100:

RH = (P_w / P_ws) * 100

To find the relative humidity, we need to determine the saturation vapor pressure at 30°C. Using a vapor pressure table or equation, we can find that the saturation vapor pressure at 30°C is approximately 4.246 kPa.

Given that the total pressure is 100 kPa, the partial pressure of water vapor is 0.17 kg / 15.17 kg * 100 kPa = 1.119 kPa.

Now we can calculate the relative humidity:

RH = (1.119 kPa / 4.246 kPa) * 100 ≈ 26.34%

So, the relative humidity is approximately 26.34%.

(c) Volume of the tank:

To find the volume of the tank, we can use the ideal gas law equation:

PV = nRT

Where P is the total pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

First, we need to calculate the number of moles of dry air and water vapor in the tank. The number of moles (n) can be obtained using the equation:

n = m / M

Where m is the mass and M is the molar mass.

The molar mass of dry air is approximately 28.97 g/mol, and the molar mass of water vapor is approximately 18.015 g/mol.

For dry air:

n_air = 15 kg / 0.02897 kg/mol ≈ 517.82 mol

For water vapor:

n_water = 0.17 kg / 0.018015 kg/mol ≈ 9.43 mol

Now we can calculate the volume using the ideal gas law:

V = (n_air + n_water) * R * T / P

Given that R is the gas constant (8.314 J/(mol·K)), T is the temperature in Kelvin (30°C + 273.15 = 303.15 K), and P is the total pressure (100 kPa), we can calculate the volume:

V = (517.82 mol + 9.43 Mol) * 8.314 J/(mol·K) * 303.15 K / (100,000 Pa) ≈ 130.75 m³

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Answer: 6 valence electrons

Explanation: the atomic number for oxygen is 8. the first shell takes 2, the second 8. so, the outer shell is the last shell, which takes 6 from oxygen because oxygen has only 8.  6 is the number for outer or valence electron for oxygen

Answer: oxide

Explanation:..

Answer:

2KCl+Fe---->FeCl2+2K

Explanation:

You can observe that the no.of atoms in reactant side is equal to that of products side of each element.

Like charges repel each other, while opposite charges attract each other. This principle is one of the fundamental aspects of electrostatics. According to Coulomb's law, the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

As the distance between two charged particles decreases, the force between them increases. This is because the closer the particles are, the stronger the electric field they create, leading to a stronger force of interaction.

On the other hand, as the magnitude of the charges decreases, the force between the particles also decreases. This is because the force is directly proportional to the product of the charges. If one or both of the charges are smaller, the force they exert on each other will be weaker.

In summary, according to Coulomb's law, decreasing the distance between charged particles increases the force between them, while decreasing the magnitude of the charges decreases the force. This understanding of the relationship between charge, distance, and force is crucial in explaining the behavior of charged particles and the interactions between them.

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The order of increasing ionic property is;

WO3 < ZrS2 < MnS2< ZnS < MnS

Ionic compounds are compounds that contain an ion pair. Typically, ionic compounds are formed between metals and nonmetals.

The degree of ionic character depends on the type of metal involved and the magnitude of charge it carries.

Typically, first row transition metals form ionic compounds. The degree of ionic character depends on the row in which the metal is found and the magnitude of charge it carries.

Hence, the order of ionic character of the compounds from most ionic to least Ionic is; WO3 < ZrS2 < MnS2< ZnS < MnS.

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2 moles of ZnO are produced if 1 mole of Zn and 2 moles of \(O_2\) is required.

A mole is defined as 6.02214076 × \(10^{23}\) of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

Balanced equation:

\(2 Zn + O_2\) → \(2 ZnO\)

For 2 moles of Zinc, we need 1 mol of Oxygen to produce 2 moles of Zinc oxide

For 1 mole Zn, we need 2 mol \(O_2\) to produce 2 moles ZnO only.

Hence, 2 moles ZnO is produced.

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Answer:

8.9 mg/l

Explanation: Temp doesnt matter so throw that out automatically then your equation is;

S1/P1=S2/P2

We are looking for S2 and that equation is;

S2=S1*P2/P1 and that is S2=22.25*1/2.5

A little bit of simple math and you get your answer: 8.9 mg/l

State of matter of both substance will be liquid at 115C.

A substance-A substance's melting point is 100 degrees Celsius. Thus, liquid material A will arise from temperatures over 100 degrees. Since material A is liquid at 115 degrees Celsius, the particles are free to migrate and glide over one another.

B Substance-It has a  freezing point of 110 degrees Celsius. This signifies that substance B will exist in a liquid condition at any temperature greater than 110 °C. In a liquid condition, the components of solution B will also be sufficiently mobile to travel past one another.

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Positive aspect of fossil fuels is They provide energy for cars, trains and heat.

1) They can be recycled and reused . this point is wrong because fossil fuels are non renewable resources and are in limits in supply . so, fossil fuels cannot be recycled.

2) They provide energy for cars, trains, and heat. This is statement is true.

3) They are ecologically friendly. this statement is wrong. The fossil fuels are not eco-friendly . they produce the pollution to the environment and severely damage our environment.

4) They do not need processing to produce energy.  they need geological process of millions years.

Thus, Positive aspect of fossil fuels is They provide energy for cars, trains and heat.

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The number of mole of electron that must pass through an electrolytic cell for silver plating in order to plate 3 moles of Ag is 3 moles of electrons

We'll begin by writing the balanced equation for the reaction to determine how many mole of electron will yield 1 mole of Ag.

Ag⁺ + e —> Ag

From the balanced equation above,

1 mole of Ag required 1 mole of electron.

From the balanced equation above,

1 mole of Ag required 1 mole of electron.

Therefore,

3 moles of Ag will also require 3 moles of electrons

Thus, 3 moles of electrons is needed to yield 3 moles of Ag

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The solubility of the solutes in the solution will determine whether each of the solutions will be saturated or unsaturated at 50 degree celcius.

Saturated solutions are solutions which contains as much solute as they can dissolve at that temperature in the presence of undissolved solute.

An unsaturated solution is a solution which contains less solute than it can dissolve at that temperature.

The solubility of a solute determines whether its solution will be saturated or unsaturated at a given temperature.

Therefore, the solubility of the solutes in the solution will determine whether each of the solutions will be saturated or unsaturated at 50 degree celcius.

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The element that helps the heart and is found in nuts and legumes is magnesium.

In this case, we are being asked about the element that promotes normal heart rhythm and muscle function and can be found in nuts, legumes, whole-grain products, and dark green vegetables. We have to know that this element is one of the key elements that are important to the health of a person.

Now we have to look at the options tat we have and see that magnesium is the element that is abundant in the nuts and the legumes and have been linked to the effective function of the heart.

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Answer:

Na2co3 moles to grams

Explanation:

You can view more details on each measurement unit: molecular weight of Na2CO3 or grams This compound is also known as Sodium Carbonate. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Na2CO3, or 105.98844 grams.

Answer:

B

Explanation:

Death of animals or plants decompose adding nitrogen to the soil

(2,0), This point is on the new line because it can be represented by the equation y=2x, which is the equation of the new line.

An equation is a mathematical statement that expresses the equality of two expressions. It establishes a relationship between the two expressions and shows that they are the same. An equation can contain any number of variables, ranging from zero to infinity. It can be used to solve problems involving unknown values, using a set of algebraic operations such as addition, subtraction, multiplication, division, and exponentiation. Equations can also be used to represent relationships between physical quantities, allowing us to understand how one quantity changes in relation to another. Equations are used in many fields, from engineering and science to economics and finance.

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Below are the three true assertions concerning autotrophs and heterotrophs on earth.

In order to support aerobic respiration, heterotrophs depend on autotrophs to produce O2 from H2O. They also depend on autotrophs to convert light energy to chemical energy. The bulk of Earth's autotrophs need aerobic respiration to survive.

Autotrophic plants use the energy from the sun and uncomplicated substances like carbon dioxide and water to store energy in food (glucose and starch). Instead of getting their energy from other living things, they get it directly from sunshine.

An organism is referred to as a heterotroph if it consumes other plants or animals for food and energy. Its origins are in the Greek words hetero, which means "other," and trophe, which means "nutrition."

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Answer:

The answer is A.

Explanation:

Producers make their own energy, whereas consumers eat other things for energy.

Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.

Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.

Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.

Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.

Errors in measurements can be classified into two types: random errors and systematic errors.

Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.

Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.

In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.

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Answer:

Composition: All hydrocarbons are made up of only two types of atoms: carbon and hydrogen. They are like building blocks that contain carbon and hydrogen stuck together.

Organic Nature: Hydrocarbons are special because they are part of a group of compounds that come from living things or things that were once alive. They have carbon and hydrogen in them, which is what makes them different from other types of compounds.

Explanation:

Answer:

Explanation:

Density of a substance can be found by using the formula

From the question

mass = 90 g

volume = 30 mL

Substitute the values into the above formula and solve for the Density

That's

We have the final answer as

Hope this helps you

Answer:5.63 atm

Explanation: Dalton's Law states that total pressure of a mixture of gasses is equal to the sum of partial pressure of each gas.

\(P_{tot} = P_{1} +P_{2}+ P_{3}...\)

We are given pressure O2 and pressure Cl2.

Step 1: First, convert 3040mmHg to atm by dividing by 760.

\(\frac{3040mmHg}{760atm} = 4 atm\)

Step 2: Plug your numbers into the equation

\(P_{tot} = P_{O2} +P_{Cl2}\)

\(P_{tot} = 4atm + 1.63 atm = 5.63 atm\)

Answer:

\(k_2=1.379x10^{-2}s^{-1}\)

Explanation:

Hello.

In this case, for a normal reaction, when we know the rate constant at a determined temperature, we can compute at another temperature via the Arrhenius equation specified for temperature change:

\(k_2=k_1exp[-\frac{Ea}{R}(\frac{1}{T_2}-\frac{1}{T_1} )]\)

In such a way, the rate constant at 9.50x10² K is:

\(k_2=3.241x10^{-5}s^{-1}exp[-\frac{255000}{8.314}(\frac{1}{950}-\frac{1}{800} )]\\\\k_2=1.379x10^{-2}s^{-1}\)

Best regards!

Answer:

The two true statements about natural selection are:

A population's environment affects the outcome of natural selection.

Natural selection can change which variations are more common in a population over time.

Natural selection acts on the existing variations within a population and favors those that confer a survival or reproductive advantage in a particular environment. Over time, the advantageous variations become more prevalent, and less advantageous ones may become less common or disappear from the population. However, natural selection does not necessarily create new variations; rather, it acts on the genetic variation that already exists within a population.

166 milligrams is equal to 0.166 grams.

If 2.28x10^-22 grams is the mass of 1 atom, then 0.166 grams would constitute how many atoms?

The equation we would make is as follows:

2.28x10^-22/1 = 0.166/x

- If we cross multiply and solve for x, we get the answer which is 7.28x10^20 atoms.

Answer:

homogenus is the correct answer