ASAP PLEASE!!!B. Complete the drawing for the sample reaction below to show the law of conservation of
mass, when XY is produced.
+
->

The molar mass of the gas is approximately 20.72 g/mol.

To determine the molar mass of the gas, we can use the ideal gas law equation:

PV = nRT

where:

P = pressure (in atm)

V = volume (in liters)

n = number of moles

R = ideal gas constant (0.0821 L·atm/(mol·K))

T = temperature (in Kelvin)

First, let's convert the given values to the appropriate units:

Pressure = 432 torr = 432/760 atm

Volume = 333 mL = 333/1000 L

Temperature = 23°C = 23 + 273.15 K

Substituting the values into the ideal gas law equation:

(432/760) atm * (333/1000) L = n * 0.0821 L·atm/(mol·K) * (23 + 273.15) K

Simplifying the equation:

0.191 atm * 0.333 L = n * 0.0821 L·atm/(mol·K) * 296.15 K

Solving for the number of moles (n):

n = (0.191 atm * 0.333 L) / (0.0821 L·atm/(mol·K) * 296.15 K)

n ≈ 0.01012 moles

Finally, we can calculate the molar mass using the formula:

Molar mass = mass of the gas sample / moles of gas

Molar mass = 0.210 g / 0.01012 moles

Molar mass ≈ 20.72 g/mol

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As per the data given in the question, the water in this experiment absorbs approximately 10450 joules (J) of energy according to the calorimeter data.

To determine the amount of energy absorbed by the water in the experiment (qH₂O), we need to use the formula:

qH₂O = m × c × ΔT

where:

qH₂O represents the energy absorbed by the water (in joules, J),

m is the mass of the water (in grams, g),

c is the specific heat capacity of water (in J/g°C), and

ΔT is the change in temperature of the water (in °C).

From the provided calorimeter data, we have:

Mass of the water (m) = 100.0 g

Specific heat capacity of water (c) = 4.18 J/g°C

Initial temperature (T₁) = 21.2 °C

Final temperature (T₂) = 46.2 °C

To calculate ΔT, we use the formula: ΔT = T₂ - T₁

ΔT = 46.2 °C - 21.2 °C = 25 °C

Now we can substitute the values into the formula for qH₂O:

qH₂O = (100.0 g) × (4.18 J/g°C) × (25 °C)

qH₂O ≈ 10450 J

Therefore, the water in this experiment absorbs approximately 10450 joules (J) of energy according to the calorimeter data.

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For the following questions:

2. The periodic table was first arranged by increasing atomic mass. False

The periodic table was first arranged by increasing atomic number. This was done by Dmitri Mendeleev in 1869.

3. The short configuration of Hf is [Xe] 6s2 4f14 5s1. True

The short configuration of Hf is [Xe] 6s2 4f14 5s1. This is because Hf has 72 electrons, and the electron configuration of Xe is [Kr] 5s2 4d10 5p6. So, the electron configuration of Hf can be written as [Xe] 6s2 4f14 5s1.

4. 150 LX 4.0 moles would equate to a molarity of 0.0266 mol/L. False

Molarity is defined as the moles of solute per liter of solution. So, to calculate the molarity of a solution, we need to divide the moles of solute by the volume of solution in liters. In this case, we have 150 L of solution and 4.0 moles of solute. So, the molarity of the solution is 4.0 moles / 150 L = 0.0266 mol/L.

5. A block 1.35 m x 2.467 m = 3.3 m². False

The area of a rectangle is calculated by multiplying the length by the width. So, the area of a block that is 1.35 m long and 2.467 m wide is 1.35 m x 2.467 m = 3.319 m².

6. The density of an unknown solid weighs 3.00 g in 5.0 mL = 0.60 g/mL. True

Density is defined as mass per unit volume. So, to calculate the density of a substance, we need to divide the mass of the substance by the volume of the substance. In this case, we have a solid that weighs 3.00 g and has a volume of 5.0 mL. So, the density of the solid is 3.00 g / 5.0 mL = 0.60 g/mL.

7. 2 moles of helium would occupy 50 L of a balloon filled with it at STP. True

At STP, one mole of any gas occupies 22.4 L. So, two moles of helium would occupy 2 x 22.4 L = 44.8 L.

8. The empirical formula of a compound is half of the molecular? False

The empirical formula of a compound is the simplest whole-number ratio of the atoms in the compound. The molecular formula of a compound is the actual number of atoms in the compound. So, the empirical formula of a compound is not necessarily half of the molecular formula.

9. Multiple compounds can have the same empirical formulas? True

Multiple compounds can have the same empirical formulas. For example, the empirical formula of methane, ethane, and propane are all CH₃. However, the molecular formulas of methane, ethane, and propane are CH₄, C₂H₆, and C₃H₈, respectively.

10. Stoichiometric calculations can only be achieved by converting to moles? False

Stoichiometric calculations can be achieved by converting to moles, but they can also be achieved by using other units, such as grams or liters.

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The freezing point of a 0.66 m solution of  [tex]C_4H_{10[/tex]  in benzene is approximately 2.1208 °C.

To calculate the freezing point of a solution we can use the below formula

ΔT = K * m

where ΔTthe change in freezing point, K is the cryoscopic constant, and m is the molality of the solution.

Given:

Freezing point of benzene = 5.50 °C

Cryoscopic constant of benzene  = 5.12 °C/m

Molality of the solution= 0.66 m

Substituting the values into the formula:

ΔT = 5.12 °C/m * 0.66 m

Calculating the value:

ΔT = 3.3792 °C

We have to subtract the calculated change in freezing point from the freezing point of pure benzene to find the freezing point of the solution

The freezing point of solution = Freezing point (benzene) - ΔT

Freezing point of solution = 5.50 °C - 3.3792 °C

Calculating the value:

Freezing point of solution = 2.1208 °C

Therefore, the freezing point of a 0.66 m solution of [tex]C_4H_{10[/tex] in benzene is approximately 2.1208 °C.

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The solubility chart provides information about the solubility of various compounds in water. Here are the solubilities of the given compounds:

a. (NH₄)₂CO₃: According to the solubility chart, most carbonate (CO₃²⁻) salts are insoluble, except for those of Group 1 metals (alkali metals) and ammonium (NH₄⁺). Therefore, (NH₄)₂CO₃ is soluble.

b. Fe(OH)₂: Hydroxide (OH⁻) salts of transition metals, including iron (Fe), are generally insoluble, except for those of Group 1 metals and ammonium. Therefore, Fe(OH)₂ is insoluble.

c. Ca(OH)₂: Calcium hydroxide (Ca(OH)₂) is soluble. However, the given compound "CaOH" appears to be missing the subscript ₂, indicating two hydroxide ions. If it should be Ca(OH)₂, then it is soluble.

d. PbCl₂: According to the solubility chart, chloride (Cl⁻) salts, including lead chloride (PbCl₂), are generally soluble, except for those of silver (Ag⁺), lead (Pb²⁺), and mercury (Hg₂²⁺). Therefore, PbCl₂ is insoluble.

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Answer:

[tex]\large \textsf{If the Keq of a reaction is 4$\times$10$^{-7}$, then:}\\\\\large \textsf{$\implies$ the equilibrium lies slightly to the left.}[/tex]

The position or extent of a chemical equilibrium can be expressed quantitatively using the equilibrium constant (Keq). If the value of Keq is large, then the equilibrium lies to the right (the product side). If the value of Keq is small, then the equilibrium lies to the left (the reactant side).

In terms of sizing, a small value of Keq usually ranges from 10⁻¹⁰ to 10⁻⁵⁰ and beyond. A large value of Keq usually ranges from 10¹⁰ and onwards.

∴ for a Keq of 4×10⁻⁷, we say that the equilibrium lies slightly to the left.

If it travells at 330m/s, and it has to travel 5100m just

5100 ÷ 330

because time = distance ÷ speed

= 15.45 s

Answer:

15.4545455 seconds

Explanation:

(5100 m) / (330 (m / s))

5100/330 = 15.4545455 seconds

The addition of a catalyst to this reaction would cause a change in "I" indicated energy differences.

If a catalyst is added to a reaction, it typically affects the activation energy (Ea) of the reaction. The activation energy is the energy barrier that needs to be overcome for the reaction to proceed.

In the context of the energy diagram for the reaction X + Y -> Z, the addition of a catalyst would primarily affect the energy difference related to the activation energy. Let's consider the options:

It is generally expected that the addition of a catalyst would primarily affect the activation energy (Ea) of the reaction, which is typically associated with the energy difference labeled as "I" on energy diagrams.

Therefore, the answer is: I only: The addition of a catalyst would cause a change in the energy difference labeled as "I" on the energy diagram.

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Answer:

Exothermic Reaction

Product  = Calcium hydroxide + hydrogen

Explanation:

When 30.0 g of iron reacts with 258 g lead (Il) nitrate and 67.8 grams of lead form, then the percentage yield is 40.62%.

Given information,

Mass of iron = 30g

Mass of Lead (III) nitrate = 258g

Mass of lead = 67.8g

The balanced equation for the reaction is:

2 Fe + 3 Pb(NO₃)₂ → 3 Pb + 2 Fe(NO₃)₃

The stoichiometric ratio between iron (Fe) and lead (Pb) is 2:3.

The moles of Fe:

Moles of Fe = mass of Fe / molar mass of Fe

Moles of Fe = 30.0/ 55.845

Moles of Pb = (3/2) × moles of Fe

The theoretical yield of Pb:

Mass of Pb (theoretical) = moles of Pb × molar mass of Pb

Mass of Pb (theoretical) = (3/2) × moles of Fe × molar mass of Pb

The percent yield:

Percent yield = (actual yield / theoretical yield) × 100

Actual yield = 67.8 g

Theoretical yield = (3/2) × (30/55.845) × 207.2 = 166.95

Percent yield = 67.8/166.9  × 100 = 40.62%

Thus, the percentage yield is 40.62%.

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The molarity of the sucrose in the iced tea mixture prepared by dissolving  0.750 moles of sucrose in the 2.00 L of iced tea is

The following data were obtained from the question:

The molarity of the solution can be obtained as illustrated below:

Molarity of solution = mole / volume

Molarity of solution = 0.750 mole / 2 liters

Molarity of solution = 0.375 M

Thus, we can conclude from the above calculation that the molarity of the solution is 2.5 M

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answer

To determine the number of moles in 4 liters of this solution, you can use the formula:

moles = concentration (M) x volume (L)

Substituting the given values:

moles = 3.0 M x 4 L

moles = 12 moles

Therefore, there would be 12 moles of HCl in 4 liters of the 3.0 M HCl solution.

The mass of [tex]O_2[/tex] needed to produce 8.65 x [tex]10^{23[/tex] atoms of silver is 22.96 grams.

In the given balanced equation, it is stated that 2 moles of [tex]Ag_2O[/tex] produce 4 moles of Ag and 1 mole of [tex]O_2[/tex].

First, let's calculate the number of moles of Ag:

8.65 x [tex]10^{23[/tex] atoms of Ag / (6.022 x [tex]10^{23[/tex] atoms/mol) = 1.435 moles of Ag

Since 2 moles of  [tex]Ag_2O[/tex] produce 1 mole of  [tex]O_2[/tex], the number of moles of  [tex]O_2[/tex] needed is half of the moles of  [tex]Ag_2O[/tex].

Number of moles of  [tex]O_2[/tex]= 1.435 moles of  [tex]Ag_2O[/tex] / 2 = 0.7175 moles

Now, we'll use the molar mass of  [tex]O_2[/tex] to find the mass:

Molar mass = 32.00 g/mol

Mass of  [tex]O_2[/tex] = number of moles × molar mass

                   = 0.7175 moles × 32.00 g/mol = 22.96 g

Therefore, the mass of  [tex]O_2[/tex] needed to produce 8.65 x [tex]10^{23[/tex] atoms of silver is 22.96 grams.

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Metamorphic rocks can be harder, less porous, and have crystals that can be lined, describing some of the ways in which metamorphic rocks differ from sedimentary rocks.

There are two different types of rocks: sedimentary rocks and metamorphic rocks. Igneous or sedimentary pre-existing rocks undergo changes under extreme heat and pressure to form metamorphic rocks. This process results in the recrystallization of minerals, leading to the formation of a new rock with distinct physical and chemical characteristics.

Therefore, the correct option is B.

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If a teacher showed an animal to students on a field trip. The  tool will allow the students to best see the animal up close is the hand lens.

Option D is correct.

A hand lens is known as a magnifying glass  which is a convex lens that is used to produce a magnified image of an object. The lens is usually mounted in a frame with a handle.

A hand lens  has two essential properties which are its focal length and its diameter.

The students will therefore require a hand lens to look up the animal close.

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#complete question:

A teacher showed this animal to students on a field trip. Which tool will allow the students to best see the animal up close? O A Tape measure O B Graduated cylinder O c. Notebook O D. Hand lens

There are approximately [tex]1.258 x 10^2^3[/tex] formula units in 50.0 g of PbO2.

We must utilize the molar mass of PbO2 (lead dioxide) and the idea of Avogadro's number to calculate the number of formula units in a given mass of PbO2.

The molar mass of PbO2 is calculated as follows:

1 atom of Pb (lead) has a molar mass of approximately 207.2 g/mol.

2 atoms of O (oxygen) have a combined molar mass of approximately 32.0 g/mol (16.0 g/mol per oxygen atom).

Therefore, the molar mass of PbO2 is:

Molar mass of PbO2 = (1 * molar mass of Pb) + (2 * molar mass of O)

= (1 * 207.2 g/mol) + (2 * 16.0 g/mol)

= 207.2 g/mol + 32.0 g/mol

= 239.2 g/mol

Now, we can use the molar mass to determine the number of formula units in 50.0 g of PbO2.

Number of moles = Mass (in grams) / Molar mass

= 50.0 g / 239.2 g/mol

≈ 0.209 moles (rounded to three decimal places)

Since 1 mole of any substance contains Avogadro's number of particles [tex](approximately 6.022 x 10^2^3),[/tex]we can calculate the number of formula units by multiplying the number of moles by Avogadro's number:

Number of formula units = Number of moles * Avogadro's number

[tex]= 0.209 moles * (6.022 x 10^2^3 formula units/mole)[/tex]

≈[tex]1.258 x 10^2^3 formula units[/tex]

Therefore, there are approximately[tex]1.258 x 10^2^3[/tex] formula units in 50.0 g of PbO2.

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Answer:

An atom contains three basic particles namely protons, neutrons and electrons. The nucleus of the atom contains protons and neutrons where protons are positively charged and neutrons are neutral. The electrons are located at the outermost regions called the electron shell.

The value of ΔG for the first reaction was calculated to be -16,21,956 kJ. The reaction is spontaneous as the value of ΔG is negative. The value of ΔS for the second reaction is 3.8 J/K. In the second equation, neither the forward nor the reverse reaction is spontaneous.

ΔG only relates to variations where the temperature and the pressure are constant. This is where most reactions take place in the lab. The system is typically open to the environment (constant pressures) and the reaction is started or ended at room temperature.

If ΔG < 0, the process is spontaneous. If ΔG = 0, the system is stable. If ΔG > 0, the process isn’t spontaneous according to the formula but occurs in the opposite direction.

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The most likely option based on common knowledge is sunlight is reacting with waste gases produced by vehicles burning fossil fuels to produce photochemical smog.

Photochemical smog is a type of air pollution that is formed when sunlight reacts with pollutants released from vehicle exhaust and other sources, such as industrial emissions. This reaction produces a mixture of harmful chemicals, including ground-level ozone and various secondary pollutants.

However, it's important to note that a definitive answer would require specific information about the picture in question, as different scenarios may lead to different outcomes.

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The density of the block of wood is approximately 38.40 g/mL.

To calculate the density of the block of wood, we need to use the formula:

Density = Mass / Volume

First, let's convert the mass of the block from grams (g) to milliliters (mL). Since the density is expressed in g/mL, the mass and volume need to have the same units.

Given:

Mass of the block = 450 g

Change in water level = 16.22 mL - 4.50 mL = 11.72 mL

Density = 450 g / 11.72 mL

Calculating the density:

Density ≈ 38.40 g/mL

Therefore, the density of the block of wood is approximately 38.40 g/mL.

The density of a substance represents its mass per unit volume. In this case, the mass of the block of wood is 450 g, and the volume is determined by the change in water level when the block is dropped into the graduated cylinder. By subtracting the initial water level (4.50 mL) from the final water level (16.22 mL), we find that the block occupies a volume of 11.72 mL. Dividing the mass by the volume gives us the density of the block, expressed in grams per milliliter.

It's important to note that the density of wood can vary depending on factors such as the type of wood and its moisture content. The value calculated here represents the density of the specific block used in the given scenario.

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I can give you a general approach to budgeting based on the guidelines you provided.

First, let's assume that the gross annual salary of the MBA entrepreneur is $100,000.

Federal Tax:

19% of $100,000 = $19,000

Net Salary:

$100,000 - $19,000 = $81,000

State Tax:

Assuming the state tax rate is 11%:

11% of $81,000 = $8,910

Net Salary:

$81,000 - $8,910 = $72,090

FICA Tax:

Assuming the FICA tax rate is 8%:

8% of $81,000 = $6,480

Net Salary:

$81,000 - $6,480 = $74,520

Monthly Net Income:

$74,520 divided by 12 = $6,210

Monthly Expenses:

Assuming a debt of $1,000 per month (credit card/student loans/car payments),

Utilities: $150

Cable and Internet: $100

Cell Phone: $50

Car Payment: $400

Groceries: $400

Car Gasoline: $150

Health Insurance: $400

Auto Insurance: $150

Home Insurance: $100

Entertainment: $200

Haircuts/Nails/Beauty: $100

Gym Membership: $50

Clothes: $100

Gifts: $100

Vacation Fund: $200

Total Monthly Expenses:

$2,900

Projected Monthly Expense:

10% of $6,210 = $621

Note that this is just an example, and your budget may differ depending on your specific circumstances and location. It's essential to track your actual expenses carefully to make sure you're sticking to your budget and adjusting it as needed.

Answer:

I apologize if this is not what you wanted! If you want a different answer or would like me to change it please let me know :)

Explanation:

For housing, I should be spending no more than 30% of my monthly net income. This includes rent, mortgage payments, and utilities. For transportation, I should be spending no more than 15% of my monthly net income. This includes car payments, gas, and insurance. For food, I should be spending no more than 10% of my monthly net income. This includes groceries and eating out. For savings, I should be spending no more than 10% of my monthly net income. This includes retirement savings, emergency funds, and other investments. For debt payments, I should be spending no more than 10% of my monthly net income. This includes student loans, credit cards, and other debts. For entertainment, I should be spending no more than 5% of my monthly net income. This includes movies, concerts, and other leisure activities.

In addition to these categories, I may also need to budget for other expenses. This could include medical bills, clothing, and other miscellaneous expenses. It is important to remember that these percentages are just guidelines and may need to be adjusted depending on my individual situation.

Scenario : I would like to save for a new cell phone which variable expense can I cut back ? How much should I save for a month on the phone?

If I would like to save for a new cell phone, I can cut back on my variable expenses. I can reduce my spending on entertainment, clothing, and miscellaneous expenses. I should aim to save at least 5% of my net annual salary for a new cell phone. This would be approximately $1,000 per year, or $83.33 per month.

id k what to do for the other two, but i hope this helps you! :))))))

Answer:

Phosphorus(P) and Oxygen(O)=Covalent bond

Chlorine(Cl) and Sodium(Na) = Ionic bond

Silver (Ag) and Silver (Ag)= Metallic bond

To produce 11.00 moles of MgCl2, you would need 858.00 grams of NaOH.

To determine the amount of NaOH needed to produce 11.00 moles of MgCl2, we need to use stoichiometry and the balanced chemical equation:

[tex]MgCl_2 + 2 NaOH[/tex] → [tex]2 NaCl + Mg(OH)_2[/tex]

From the balanced equation, we can see that the mole ratio between [tex]MgCl_2[/tex]and NaOH is 1:2.

Therefore, for every 1 mole of[tex]MgCl_2[/tex], we need 2 moles of NaOH.

Given: Moles of [tex]MgCl_2[/tex]= 11.00 moles

Using the mole ratio, we can calculate the moles of NaOH required:

moles of NaOH = 2 * moles of MgCl2

moles of NaOH = 2 * 11.00 moles

moles of NaOH = 22.00 moles

Now, we need to convert the moles of NaOH to grams using the molar mass of NaOH:

The molar mass of NaOH = 22.99 g/mol + 16.00 g/mol + 1.01 g/mol = 39.00 g/mol

grams of NaOH = moles of NaOH * molar mass of NaOH

grams of NaOH = 22.00 moles * 39.00 g/mol

grams of NaOH = 858.00 grams

Therefore, to produce 11.00 moles of [tex]MgCl_2[/tex], you would need 858.00 grams of NaOH.

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Dividing the class into groups and assigning them the task of measuring the mass of the same object multiple times promotes scientific inquiry, encourages critical thinking.

It also provides an opportunity to discuss the concepts of precision, accuracy, and the role of statistical analysis in scientific investigations.

When the teacher divides her class into groups and assigns each group the task of measuring the mass of the same object three times, it allows for multiple measurements to be taken in order to obtain more accurate and reliable results. This approach is a common practice in scientific experiments and data collection.

By having multiple groups perform the measurements, several factors come into play:

1. Precision: Each group's measurements may have some inherent variability due to factors such as the sensitivity of the measuring instrument, human error, or slight variations in the experimental conditions. Taking multiple measurements allows for better assessment of the precision of the measurements by evaluating the spread or range of values obtained.

2. Accuracy: While the teacher already knows the mass of the object is 25 g, the purpose of the exercise is to assess the accuracy of the measurements performed by the students. By comparing the measured values from each group to the known value, the teacher can evaluate the accuracy of the measurements and identify any systematic errors or biases.

3. Averaging: Taking multiple measurements allows for the calculation of an average value, which tends to be a more reliable representation of the true value. By averaging the measurements from all the groups, the teacher can obtain a more accurate estimate of the mass of the object.

4. Statistical Analysis: With multiple measurements, the teacher can perform statistical analysis on the data, such as calculating measures of central tendency (mean, median) and measures of dispersion (standard deviation), to further assess the quality and reliability of the measurements.

Overall, dividing the class into groups and assigning them the task of measuring the mass of the same object multiple times promotes scientific inquiry, encourages critical thinking, and helps students understand the importance of repeated measurements in obtaining accurate and reliable data. It also provides an opportunity to discuss the concepts of precision, accuracy, and the role of statistical analysis in scientific investigations.

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Answer:

[tex]\huge\boxed{\sf CNH_4}[/tex]

Explanation:

Given compound us,

C₂N₂H₈

= 2 : 2 : 8

= 2 ÷ 2 : 2 ÷ 2 : 8 ÷ 2

= 1 : 1 : 4

So, we can write the formula as:

[tex]\rule[225]{225}{2}[/tex]

Answer:  505 grams K3PO4 x (3 x 222 grams HCI)/ (3 x K3PO4) = 555.5 grams KCl

Explanation:

Taking into account definition of theoretical yield, Cl₂ is the limiting reagent and the theoretical yield is 100.31 grams of AlCl₃ if 60 g Al react with 80 g of Cl₂ and produce aluminum chloride

In first place, the balanced reaction is:

2 Al + 3 Cl₂ → 2 AlCl₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction.

To determine the limiting reagent, it is possible to use a rule of three as follows: if by stoichiometry 54 grams of Al reacts with 212.7 grams of Cl₂, 60 grams of Al reacts with how much mass of Cl₂?

mass of Cl₂= (60 grams of Al× 212.7 grams of Cl₂)÷54 grams of Al

mass of Cl₂= 236.33 grams

But 236.33 grams of Cl₂ are not available, 80 grams are available. Since you have less mass than you need to react with 60 grams of Al, Cl₂ will be the limiting reagent.

The theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.

Considering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 212.7 grams of Cl₂ form 266.7 grams of AlCl₃, 80 grams of Cl₂ form how much mass of AlCl₃?

mass of AlCl₃= (80 grams of Cl₂×266.7 grams of AlCl₃)÷212.7 grams of Cl₂

mass of AlCl₃= 100.31 grams

Finally, the theoretical yield is 100.31 grams of AlCl₃.

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