4. Cobalt(II) chloride reacts with fluorine in a single replacement reaction to produce

cobalt(II) fluoride and chlorine gas.

Balanced Equation:

+

How many moles of fluorine are required to produce 290.8 g of cobalt(II) fluoride?

tinn

I would have to go with option

A. Energy must be added, particles must slow down

Hope this helps

Answer:

1. The combined number of protons and neutrons remains constant.

2. There are two atoms with mass numbers of 2.

3. It is the number of protons plus neutrons.

4. A nucleus with a greater mass than any of the reactants will be produced.

5. Fusion reactions in the sun convert small amounts of matter into large amounts of energy.

When a chocolate bar is solid, it is able to smell it.  It is also important to note that a substance 's molecules cannot be in two distinct phases at the a time.

In general, it is not possible for a the molecules of the chocolate  to be in two distinct phases at the same time.

It must be noted that smelling a solid, such as a chocolate bar, however, mean  the release  of loose molecules from the solid,   which may then move   through the air and   reach our olfactory receptors in our nose, allowing us to sense the fragrance.

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In this sentence, the word "documented" is used as a verb, meaning "to support with citations or references."

Therefore, the word "document" is being used in the sense of providing evidence or proof for a particular statement or claim.

What are citations?

Citations are references to sources of information used in a piece of work, such as a research paper or academic article. Citations give credit to the authors of the sources and provide evidence to support the claims or arguments made in the work.

Citations typically include the author's name, the title of the work, the publication date, and information about where the work was published, such as the name of the journal or book. Citations may also include page numbers, volume numbers, and other details, depending on the citation style being used.

Citations can be presented in different formats depending on the citation style being used, such as APA, MLA, or Chicago style. Proper citation is important because it allows readers to find the sources used in a work and evaluate the credibility and reliability of the information presented.

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The isotope Ba139 is radioactive, has a half-life of 85 minutes and decays to La139 by β-emission.

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В

an echo is caused by the fact that waves can be reflected by solid surfaces, this is due to the dynamic pattern of rarefactions and air seals near the reflecting surface

Answer:

holaholaholaholaholaholaholahola

The volume occupied by the oxygen gas at a pressure of 210 kPa and a temperature of 50°C is 0.126 liters, rounded to three significant figures.

To calculate the volume occupied by the oxygen gas at a pressure of 210 kPa and a temperature of 50°C, we can use the ideal gas law equation:

PV = nRT

where:

P = pressure

V = volume

n = number of moles

R = ideal gas constant

T = temperature

First, we need to convert the given temperature from Celsius to Kelvin by adding 273.15:

T = 50°C + 273.15 = 323.15 K

Next, we rearrange the ideal gas law equation to solve for volume:

V = (nRT) / P

To find the number of moles (n), we can use the answer from question 27, which is the mass of oxygen gas:

m = 32 g

Using the molar mass of oxygen (O₂) which is approximately 32 g/mol, we can calculate the number of moles:

n = m / M = 32 g / 32 g/mol = 1 mol

Now we have all the values needed to calculate the volume:

V = (1 mol * 8.314 J/(mol*K) * 323.15 K) / 210,000 Pa

Using the ideal gas constant (R) of 8.314 J/(mol*K) and the pressure of 210 kPa (which is equivalent to 210,000 Pa), we can substitute these values into the equation and solve for volume.

V = 0.126 liters.

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Answer:

FeCl3 + 3KOH → Fe(OH)3 + 3KCl

Explanation:

Answer:

\(P_{tol}=30.34mmHg\)

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to calculate the vapor pressure of pure toluene by using the Raoult's law as shown below:

\(y_{tol}P_{mix}=x_{tol}P_{tol}\\\\y_{ben}P_{mix}=x_{ben}P_{ben}\)

Thus, we solve for the mole fraction of benzene in the vapor phase first:

\(y_{ben}=\frac{x_{ben}P_{ben}}{P_{mix}} =\frac{0.5*96.1mmHg}{63.2mmHg}=0.76\)

Which means that the mole fraction of toluene in the vapor phase is 0.24, and therefore, the vapor pressure of pure toluene turns out to be:

\(P_{tol}=\frac{y_{tol}P_{mix}}{x_{tol}} =\frac{0.24*63.2mmHg}{0.5}=30.34mmHg\)

Regards!

You would recover 36.525g of NaCl after evaporating all of the water.

To find the grams of NaCl that would be recovered after evaporating all the water, we can use the following formula:

mass = moles * molar mass

Where:

Moles = Molarity * Volume

Molarity = 0.250 M

Volume = 2500.0 mL = 2.5 L

Molar mass of NaCl = 58.44 g/mol

mass = 0.250 M * 2.5 L * 58.44 g/mol

mass = 36.525 g

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Answer:

B. Branched Alkene

HOPE THIS HELPS :-)

The concentration of Ibuprofen in the solution is approximately 0.124 M (Molarity), calculated by dividing the moles of Ibuprofen (0.0214 mol) by the volume of the solution (0.172 L).

To calculate the concentration of Ibuprofen in molarity, we need to use the formula:

Concentration (Molarity) = moles of solute / volume of solution in liters

First, we need to convert the mass of Ibuprofen into moles. The molar mass of Ibuprofen is given as 206.29 g/mol.

Step 1: Convert milligrams to grams:

4,421 mg = 4.421 g

Step 2: Convert grams to moles:

moles = mass / molar mass

moles = 4.421 g / 206.29 g/mol

moles ≈ 0.0214 mol

Step 3: Calculate the concentration:

Concentration = moles / volume

Concentration = 0.0214 mol / 0.172 L

Concentration ≈ 0.124 M

Therefore, the concentration of Ibuprofen in the solution is approximately 0.124 M (Molarity). This means that there are 0.124 moles of Ibuprofen dissolved in every liter of the solution.

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Answer:

Explanation:

K: 157.8 g CaCl2

U: ? mol CaCl2

1Ca = 1(40.08) = 40.08

2 Cl = 2(35.45) =+70.90

110.98

157.8 g CaCl2 1 mol CaCl2

x

1 mol CaCl2 110.98 g CaCl2

Time increases as the volume of hydrochloric acid remains the same. This is because the concentration of hydrochloric acid would remain constant, affecting the reaction rate. Option B

Based on factors that affect the rates of chemical reactions, the expected trend in the table can be analyzed.

In this experiment, calcium carbonate reacts with hydrochloric acid to produce carbon dioxide gas. The reaction rate is influenced by factors such as concentration, surface area, temperature, and presence of a catalyst. Let's examine the options provided:

A. Time increases as the volume of hydrochloric acid decreases:

This option suggests that as the volume of hydrochloric acid decreases, the time taken for carbon dioxide to form increases. However, in general, a decrease in the volume of hydrochloric acid would result in an increase in its concentration.

B. Time increases as the volume of hydrochloric acid remains the same:

If the volume of hydrochloric acid remains the same, it means the concentration of hydrochloric acid is constant. In this case, the reaction rate is not expected to change significantly, and the time taken for carbon dioxide to form should remain relatively constant. Therefore, this option is plausible.

C. Time decreases as the mass of calcium carbonate decreases:

If the mass of calcium carbonate decreases, the surface area of the reactant particles decreases. A smaller surface area would result in less contact between reactant particles, leading to a slower reaction rate. Thus, the time taken for carbon dioxide to form would be expected to increase, making this option unlikely.

D. Time decreases as the mass of calcium carbonate remains the same:

If the mass of calcium carbonate remains the same, the surface area of the reactant particles also remains the same. Therefore, the reaction rate should remain relatively constant, and the time taken for carbon dioxide to form would not show a significant change. Thus, this option is also plausible.

Option B is correct.

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The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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Answer:

All of the following statements are true regarding wood versus metal except:

c) Under sustained loads wood stops to deform

Explanation:

Wood is known to deform under stress.  It undergoes warping, thereby, losing its original straight shape when its moisture unevenly dries up.  Even concrete deforms under long-time loads.  Similarly, wood, under sustained loads, experiences faster deformation than it ordinarily warps.  To prevent further wood deformation, it must be treated, and its moisture dried up evenly.

Answer:

no of moles=mass in gm÷molar mass so let x be the mass in gm

4.5=x÷35.5×2

x=4.5×35.5×2 grams

x=319.5 gm

Explanation:

formula

Answer:

Explanation:

Oxiding agent act as "Reduction" which loses oxygen in the product side.

Reducing agent act as "Oxidation" which gains oxygen.

Answer:

I would answer but not enough information

The experimental setup includes the variables that determine the result. The neighbor with a traditional garage door opener is the control, volunteers are independent, and the number of door openings is the dependent variable.

Dependent variables are said to be the data that are affected and altered by the other variable of the experimental design. In the experiment of the door opener app, the number of times the door opens is the dependent variable as it depends on the distance.

Independent variables are said to be the data that influence the dependent variable and are the cause in an experimental group are the test variables. The volunteers that have access to the door open app are the independent variables.

On the other hand, the control is the group that lacks the independent variable and is deemed to be constant as they must alter the other factor leading to changes in the result. The number of times the garage door opens is constant.

Therefore, the independent and dependent variables are the test variables.

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The element that has chemical properties most similar to sodium is d. rubidium.

What is rubidium?

Rubidium is in the same group (group 1) as sodium in the periodic table and has similar chemical properties, such as reactivity with water and the tendency to form ionic compounds with halogens. Magnesium, oxygen, and phosphorus are not in the same group as sodium and have different chemical properties.

What is periodic table?

The periodic table is a tabular display of all known chemical elements, arranged according to their atomic structure and properties. It is arranged in rows and columns, with elements placed in order of increasing atomic number, which is the number of protons in an atom's nucleus. The periodic table is a powerful tool for predicting the chemical behavior of elements and for understanding the relationships between different elements. It is used extensively in chemistry, physics, and other sciences to help understand the properties and behavior of different elements, and to guide research and development in many different fields.

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20.0 moles of oxygen react with Antimony to form 13.3 moles of Antimony (III) Oxide. We want to calculate how many moles of Antimony (III) Oxide will be formed from 20.0 moles of oxygen. This is a stoichiometry problem.

The link between the proportional amounts of components participating in a reaction or generating a compound is known as stoichiometry, and it is often expressed as a ratio of whole integers.

Assuming a balanced chemical equation, the stoichiometric ratio between Antimony (III) Oxide  and oxygen can be used to determine the number of moles of Antimony (III) Oxide  formed.

For example, the balanced equation for the reaction of Antimony with O2 to form Antimony (III) Oxide  is:

4 Antimony + 3 O2 → 2 Antimony (III) Oxide

From this equation, it can be seen that 3 moles of oxygen react with 2 moles of Antimony (III) Oxide . Therefore, if there are 20.0 moles of O2, then the number of moles of Antimony (III) Oxide  formed would be:

20.0 moles oxygen × (2 moles Antimony (III) Oxide  / 3 moles oxygen) = 13.3 moles Antimony (III) Oxide.

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No, a 1.5 M solution cannot be made from a 0.98 M solution.

Explain molarity

Probably the most frequently used unit of measurement for solution concentration is molarity, abbreviated as (M). The ratio of the number of liters of solution to the number of moles of solvent is known as molarity.

Knowing the molarity (M) of the solution of a specific volume will allow you to calculate the number of moles (n) of a chemical dissolved in a solution (V). The quantity of solvent moles per kilogram is known as molality, which is a property of solutions. Since molality solely depends on the masses of the solute and solvent, which are unaffected by changes in temperature and pressure, it is a particularly advantageous way to estimate concentration.

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To obtain salt from a mixture of salt and sand, the mixture is filtered, then dissolved in water, and finally, water is made to evaporate leaving the sand. So, option C is the correct answer.

Sand and salt mixture consists of soluble and insoluble components. Salt is soluble in water while sand is not. The sand from this mixture can be separated using filtration, a method of filtering insoluble components from a solvent, typically using filter paper or various mediums in an industrial process. This way sand is separated from the mixture.

However, there will be minute particles that may not be filtered but are mostly insoluble. So, the mixture is mixed in water where salt dissolves leaving the other impurities that are insoluble.

The salt water is then heated so that water evaporates leaving only the salt behind. In this way, only salt is obtained.

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The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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Answer:

Explanation:

The ∆H of solution of NaOH is 46.8 kJ/mol.

First, we need to calculate the amount of heat absorbed by the solution:

q = m × c × ∆T

where q is the heat absorbed (in Joules), m is the mass of the solution (in grams), c is the specific heat capacity of the solution (in J/(g °C)), and ∆T is the change in temperature (in °C).

In this case, the mass of the solution is the sum of the mass of NaOH and the mass of water:

m = 7.59 g + 80.0 g = 87.59 g

The change in temperature is:

∆T = 48.0 °C - 25.0 °C = 23.0 °C

Substituting the values, we get:

q = 87.59 g × 4.184 J/(g °C) × 23.0 °C = 8,878 J

Next, we need to convert the heat absorbed into the enthalpy change of solution (∆H). The enthalpy change of solution is the heat absorbed per mole of solute. The number of moles of NaOH is:

n = m/M

where M is the molar mass of NaOH, which is 40.00 g/mol.

n = 7.59 g / 40.00 g/mol = 0.1898 mol

Therefore, the enthalpy change of solution is:

∆H = q/n = 8,878 J / 0.1898 mol = 46,780 J/mol = 46.78 kJ/mol

The H of a NaOH solution, rounded to three significant numbers, is 46.8 kJ/mol.

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Answer:

A. C

Because in the given formulae there is no additional subscript, thus meaning only 1 atom is present.

Answer:

Answr - A. Carbon

Answer:

unconsolidated material that contains nutrient matter and weathered rock

Explanation:

Earth's crust is made up of many layers. The top is soil, which provides the most nutrients for plants, like hummus( The organic nutrient for soil, form from the decaying of plants and animals)

The soil gets its texture from the bedrock, the bottom layer, which weathers, and goes into the soil.

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