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Propane gas, C3H8

First, we need the molar mass of propane to solve this.

The molar mass of propane = 44.1 g/mol

(use the periodic table)

Procedure:

1 mol of Propane = 44.1 g

We want to know the mass of 2 moles of it, so we proceed like this:

1 mol C3H8 ---------- 44.1 g C3H8

2 moles C3H8---------- x

x = 88.2 g C3H8

Answer: the mas of C3H8 = 88.2 g

The concentration of the original sulfuric acid solution is 0.05398M

In order to determine the concentration of the original sulfuric acid solution, we use the volume of the standard sodium hydroxide solution used in the titration along with the concept of stoichiometry.

Let us check the number of moles of sodium hydroxide (NaOH) used in the titration,

Moles of NaOH = Molarity of NaOH x Volume of NaOH

=0.1463M x 18.47 mL

= 0.002699 Moles

As the balanced chemical equation between Sulfuric acid (\(H_SO_4\)) and sodium hydroxide is 1:2, then we can deduct that 1 mole of sulfuric acid can react with 2 moles of sodium hydroxide.

In that case, the number of moles of sulfuric acid in the 10.00 mL sample is;

Moles of \(H_2SO_4\) = 0.002699 Moles x (1/2)

= 0.0013495 Moles

Now we can calculate the concentration of the original sulfuric acid solution:

That is, the concentration of \(H_2SO_4\) = Moles of \(H_2SO_4\) / Volume of original acid solution

=0.0013495 Moles / 0.02500L

=0.05398 M

Therefore, the concentration of the original sulfuric acid solution is approximately 0.05398 M.

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Explanation:

B) 3CuCl2+2AL..….2AlCl3+3Cu

hope it helps.

Balanced Equation:

3CuCl₂ + 2Al = 2AlCl₃ + 3Cu

The machine exerts a force of 9 newtons on the baseball to accelerate it from 0 m/s to 30 m/s in 0.5 seconds.

To calculate the force exerted by the machine on the baseball, we can use Newton's second law of motion, which states that force (F) is equal to the product of mass (m) and acceleration (a).

In this case, the acceleration can be determined using the formula a = (v - u) / t, where v is the final velocity, u is the initial velocity, and t is the time taken for the acceleration.

Given:

Mass of the baseball (m) = 0.15 kg

Initial velocity (u) = 0 m/s (as the baseball starts from rest)

Final velocity (v) = 30 m/s

Time (t) = 0.5 s

First, let's calculate the acceleration:

a = (v - u) / t

a = (30 m/s - 0 m/s) / 0.5 s

a = 60 m/s^2

Now, we can use the calculated acceleration and the given mass to determine the force:

F = m * a

F = 0.15 kg * 60 m/s^2

F = 9 N

The machine exerts a force of 9 newtons on the baseball. This force is calculated using Newton's second law of motion, which states that force is equal to mass multiplied by acceleration.

By determining the acceleration of the baseball using the formula a = (v - u) / t and substituting the given values, we find that the acceleration is 60 m/s^2. Multiplying the mass of the baseball (0.15 kg) by the acceleration gives the force exerted by the machine as 9 newtons.

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The given chemical equation, 2N₂ + 3H₂ <==>2NH3, is an example of a reversible reaction.option A.

The double arrows between the reactants and products indicate that the reaction can proceed in both directions, forming both products and reactants.The reversible reaction, also known as a chemical equilibrium reaction, refers to a chemical reaction that can occur in both forward and reverse directions. It occurs when reactants are converted into products, and the products are also converted back into the original reactants.A reversible reaction can be identified by the symbol “<==>” or “⇌” that appears between the reactants and products in the chemical equation. It denotes that the reaction is in a state of chemical equilibrium. When the reactants and products have achieved equilibrium, the rate of the forward and reverse reactions is equal, and there is no further net change in the amounts of the reactants and products.A combustion reaction is a type of exothermic reaction in which a substance reacts with an oxidizing agent to produce heat and light. A one-way reaction is a type of reaction that occurs in only one direction and cannot be reversed without significant changes to the reaction conditions, such as changing the temperature or pressure.A reversible reaction, unlike a one-way reaction, can occur in both directions and reach equilibrium when the forward and reverse reaction rates are equal.option A.

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Answer:

True

Explanation:

magnesium and copper react with dilute acids to make salts and hydrogen gas

Answer:

c2-c

Explanation:

A mental that lost two electrons just joking I don't k ow but I think it ain't the first o e because of comment sense to the 5th power

Answer:

A and B

Explanation:

metal form ion by lossing elecron

non metal form ion by gaining electron

You could form approximately 5.8 grams of methanol (CH3OH) from the given gas mixture at STP.

Using the Ideal gas equation;

n = PV / RT

n = (1 atm * 7.82 L) / (0.0821 L·atm/(mol·K) * 273.15 K)

From the question;

nCO = n / 2

nH2 = n / 2

Then;

n = (1 atm * 7.82 L) / (0.0821 L·atm/(mol·K) * 273.15 K)

n = 0.362 mol

nCO = n / 2 = 0.362 mol / 2 = 0.181 mol

nH2 = n / 2 = 0.362 mol / 2 = 0.181 mol

By stoichiometry;

methanol= nCO = 0.181 mol

Mass of methanol =  0.181 mol * 32.04 g/mol

= 5.8 g

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The name of the compound from the structure that we can see in the question is;

4,4-dibromohex-2one

The International Union of Pure and Applied Chemistry (IUPAC) established a systematic set of guidelines for naming organic compounds.

Find the compound's longest continuous chain of carbon atoms. The compound's name is derived from this chain, which also acts as the compound's parent chain.

Assign a number to each carbon atom in the parent chain to give each carbon atom in the compound a special identification. The end that is closest to the functional group or substitutes is where the numbering begins.

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When dissolved in water, most Group 1 metal salts can be described as strong electrolytes.

When Group 1 metal salts are dissolved in water, they can be described as strong electrolytes. This is because Group 1 metals, such as lithium (Li), sodium (Na), potassium (K), and so on, readily lose their outermost valence electron to form positive ions (cations). These cations then dissociate completely in water, separating from the anions to which they were originally bonded.

The dissociation of Group 1 metal salts in water results in the formation of positively charged metal ions and negatively charged non-metal ions (anions). These ions are free to move and conduct electric current, making the solution a good conductor of electricity. The complete dissociation of Group 1 metal salts in water and the presence of freely moving ions make them strong electrolytes.

Strong electrolytes are substances that ionize completely or almost completely in solution, producing a high concentration of ions. This is in contrast to weak electrolytes, which only partially ionize and produce a lower concentration of ions.

In summary, when Group 1 metal salts are dissolved in water, they form strong electrolytes due to their ability to dissociate completely into ions, leading to a high concentration of freely moving ions in the solution, thus enabling efficient electrical conductivity.

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Answer:

The waters' temp increased

Explanation:

The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.

1) n-heptane

2) 3-methyl hexane

3) 2-methyl hexane

4) 2,2-dimethyl pentane

5) 2,3-dimethyl pentane

6) 2,4-dimethyl pentane

7) 3,3-dimethyl pentane

8) 3-ethyl pentane

9) 2,2,3-trimethyl butane

The combination from the available option that will make a solution would be sugar and water.

Solutions are obtained when solutes dissolve in solvents.

In other words, a solute must be able to dissolve in a solvent before a solution can be formed.

Oil and water cannot mix, and thus, cannot form a solution. Sand is insoluble in water and ice and water are the same.

Thus, the only option left is sugar and water. Sugar dissolves in water to form a sugar solution.

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Moles of MgF₂ : 1.2 x 10⁻⁴

Maybe the complete question is like this

A student prepares 100. mL of a saturated solution of MgF2 by adding 0.50 g of solid MgF2 to 100. mL  of distilled water at 25°C and stirring until no more solid dissolves. (Assume that the volume of the  undissolved MgF2 is negligibly small.) The saturated solution is analyzed, and it is determined that [F−] in  the solution is 2.4 × 10−3 M.

The dissociation reaction of MgF₂

MgF₂(s)⇒ Mg²⁺(aq)+2F⁻(aq)

mol ratio MgF₂ : F⁻ = 1 : 2

mol of F⁻ in 100 ml solution :

\(\tt mol=M\times V\\\\mol=2.4\times 10^{-3}\times 0.1=2.4\times 10^{-4}\)

mol MgF₂ :

\(\tt \dfrac{1}{2}\times 2.4\times 10^{-4}= 1.2\times 10^{-4}\)

While tumor marker test results can be useful, they are not conclusive. A low result does not imply that you do not have cancer or that you are in remission.

CA 15-3, for example, is raised in less than half of patients with early breast cancer and in more than 80% of those with metastatic breast cancer. Three tumor markers, cancer antigen 15-3 (CA 15-3), cancer antigen 27.29 (CA 27.29), and carcinoembryonic antigen (CEA), have been used in breast cancer care to help monitor metastatic breast cancer (advanced disease), but they have not been found to be useful in detecting a breast cancer recurrence or extending lives. If the level falls, the treatment is effective. If it rises, the cancer may be spreading.

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Answer:

I think the answer is b. gas and liquid is a state of matter.

The mass of the cereal that you would need to consume can be obtained as 84.8 g

The number of moles, denoted by the symbol "n," is a fundamental unit of measurement in chemistry that represents the amount of a substance. It is used to quantify the quantity of atoms, molecules, or ions in a sample.

Number of moles of sucrose in the cereal = 11g/342 g/mol

= 0.03 moles

Now;

0.03 moles of sucrose is contained in 60 g of cereal

0.0424 moles of sucrose would contain 0.0424 moles * 60 g/0.03 moles

= 84.8 g

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A. The mole of 6.00 g oxygen, O₂ is 0.188 mole

B. The mole of 450.0 g of iron(III) oxide, Fe₂O₃ is 2.92 moles

C. The mole of 45.5 g of calcium chloride, CaCl₂ is 0.41 mole

The mole present in 6.00 g oxygen, O₂ can be obtained as follow:

Mole = mass / molar mass

Mole of oxygen, O₂ = 6 / 32

Mole of oxygen, O₂ = 0.188 mole

The mole present in 450.0 g of iron(III) oxide, Fe₂O₃ can be obtained as follow:

Mole = mass / molar mass

Mole of Fe₂O₃ = 450/ 159.69

Mole of Fe₂O₃ = 2.92 moles

The mole present in 45.5 g of calcium chloride, CaCl₂ can be obtained as follow:

Mole = mass / molar mass

Mole of CaCl₂ = 45.5/ 111

Mole of CaCl₂ = 0.41 mole

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S wave is a mechanical wave rather than a electromagnetic wave and are transverse in nature.

The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.

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The target of anti-rotation machine for the scheme to work is the earth itself. Thus option C is correct.

Anti-rotation movement is defined as any movement that includes clenching and holding your core fully still while keeping the rest of your body in a single plane, or direction, of motion.

It can also be defined as any movement that requires you to clench your core and hold it absolutely still while moving the rest of your body.

The three exercise for anti-rotation are

Work is defined as the product of the force component in the displacement's direction and the size of the displacement.

Thus, the  target of anti-rotation machine for the scheme to work is the earth itself. Thus option C is correct.

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Answer:

3O2→ 2O3

Explanation:

by multiplying 2 by 3 we get 6 on both sides

Answer:

Testing of thesis testing is used to determine the plausibility of a thesis.

The test assess the plausibility of the thesis of a sample data.

It occurs through different way, the first step is used to test the state the two suppositions.

In the coming step evaluation of data, third step include carry out plan and dissect the data.

The final step is to dissect the results of the data, it can moreover accept the thesis and reject the null thesis.

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2520 joule is the heat (q) when a student dissolves 5.00 g of CaCl₂ into 200.0 g of H₂O. The temperature changes from 25.0°C to 28.0°C.

H₂O mass=200.0 g

c of H₂O= 4.2 joules per gram

Δt=3 °C

q=mcΔt

q=200.0 g×4.2×3

q=2520 joule

mass of solution= (solute + solute)

mass of solution=5.00 g+200.0 g

mass of solution=700 g

Heat has a very precise meaning in thermodynamics that is distinct from how we typically use the word. Heat is the thermal energy that is transmitted when two systems with different surface temperatures come into contact. Heat is denoted by the letters q or Q and is measured in Joules.

Because it is defined in the context of a process through which energy can be transmitted, heat is occasionally referred to as a process quantity. We don't discuss the heat that a cup of coffee contains, but we may discuss the heat that the cup of hot coffee transfers to your hand. Another significant characteristic is heat.

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The total kilojoules in two tablespoons is  836.8 kJ.

To determine the total kilojoules in two tablespoons of a substance, we need to know the specific substance and its energy content per tablespoon. Different substances have different energy values, so without this information, it is not possible to provide an accurate calculation.

The energy content of food or substances is typically measured in kilocalories (kcal) or kilojoules (kJ). 1 kilocalorie is equal to 4.184 kilojoules. The energy content of a substance is often listed on food labels or in nutritional databases.

For example, if we have the energy content of a substance as 100 kilocalories (kcal) per tablespoon, we can convert it to kilojoules by multiplying it by 4.184:

100 kcal * 4.184 kJ/kcal = 418.4 kJ

So, if we have two tablespoons of this substance, the total energy would be:

418.4 kJ/tablespoon * 2 tablespoons = 836.8 kJ

It's important to note that the energy content of a substance can vary depending on its composition, density, and other factors. Therefore, it is always recommended to refer to reliable sources such as food labels, nutritional databases, or consult a qualified professional to obtain accurate information regarding the energy content of specific substances.

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The pressure exerted by a column of mercury that is about 760 mm high corresponds to approximately 0.987 atm.

To calculate the pressure exerted by a column of mercury, we can use the formula:

Pressure = density * gravity * height

Given:

Density of mercury = 13.6 g/cm³

Height of the mercury column = 760 mm = 76 cm

Acceleration due to gravity = 9.8 m/s²

First, we need to convert the height of the mercury column from centimeters to meters:

Height = 76 cm * (1 m / 100 cm) = 0.76 m

Now, we can calculate the pressure:

Pressure = 13.6 g/cm³ * 9.8 m/s² * 0.76 m

To ensure consistent units, we need to convert the density from grams per cubic centimeter (g/cm³) to kilograms per cubic meter (kg/m³):

Density = 13.6 g/cm³ * (1 kg / 1000 g) * (1 cm³ / (1e-6 m³))

Density = 13600 kg/m³

Plugging in the values into the pressure formula:

Pressure = 13600 kg/m³ * 9.8 m/s² * 0.76 m

Pressure = 99992.8 Pa

We can express the pressure in terms of atmospheric pressure:

1 atm = 101325 Pa (approximately)

To compare the pressure with atmospheric pressure, we can convert 99992.8 Pa to atm:

Pressure in atm = 99992.8 Pa / 101325 Pa/atm

Pressure in atm ≈ 0.987 atm

The pressure exerted by a column of mercury that is about 760 mm high corresponds to approximately 0.987 atm. Since atmospheric pressure near sea level is approximately 1 atm, this calculation supports the claim that atmospheric pressure near sea level is equivalent to the pressure exerted by a column of mercury about 760 mm high.

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To determine the enthalpy of reaction for the given reaction, use Hess's Law, which states that the total enthalpy change of a reaction is independent of the pathway between the initial and final states.

Break the given reaction into a series of steps for which the enthalpy changes are known or can be measured experimentally.

Add the enthalpy changes of each step to determine the overall enthalpy change for the reaction.

For example, determine the enthalpy of formation for A₂X₄(l), X₂(g), and AX₃(g) and use them to calculate the enthalpy of reaction for the given equation.

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Answer:

solid, liquid and gas

Explanation:

Three states of matter exist—solid, liquid, and gas. Solids have a definite shape and volume. Liquids have a definite volume, but take the shape of the container. Gases have no definite shape or volume.