When 25.0 g of ch4 reacts completely with excess chlorine yielding 45.0 g of ch3cl, what is the percentage yield, according to ch4(g) + cl2(g) → ch3cl(g) + hcl(g)?

An aqueous magnesium chloride solution is made by dissolving 7.40 moles of MgCl₂ in sufficient water so that the final volume of the solution is 4.80 L. the molarity of the MgCl₂ solution is equal to 1.54 M.

Molarity is a unit of concentration, which measures the number of moles of a solute per liter of a solution. To calculate molarity, one divides the amount of solute (in moles) by the total volume of the solution (in liters). In chemistry, molarity is often used to measure concentrations of acids, bases, and other solutes in solutions. This unit of concentration is important in lab work, as it allows scientists and researchers to accurately measure and predict the behavior of solutions.

Molarity (M) = /\(\frac{moles of solute}{liters of solution }\)

Molarity (M) =  \(\frac{7.4mol}{4.8L}\)

Molarity (M) = 1.54 M

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Answer:

The mass of water is  14292.24 g

Explanation:

Given data:

Mass of cups and water = 142,99 g

Mass of cups = 6.76 g

Mass of water = ?

Solution:

Mass of cups + water = mass of cups + mass of water

Now we will rearrange the formula

mass of water = (Mass of cups + water) - mass of cups

Now we will put the values.

mass of water = 142,99 g + 6.76 g

mass of water = 14292.24 g

Thus mass of water is  14292.24 g.

There are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.

To determine the number of moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3, we need to consider the stoichiometry of the compound.

The formula of aluminum sulfate (Al2(SO4)3) indicates that for every 1 mole of the compound, there are 2 moles of aluminum ions (Al3+). This means that the mole ratio of Al3+ to Al2(SO4)3 is 2:1.

Given that we have 0.42 mol of Al2(SO4)3, we can calculate the moles of Al3+ as follows:

Moles of Al3+ = 0.42 mol Al2(SO4)3 x (2 mol Al3+ / 1 mol Al2(SO4)3)

Moles of Al3+ = 0.42 mol Al2(SO4)3 x 2

Moles of Al3+ = 0.84 mol Al3+

Therefore, there are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.

It's important to note that the stoichiometry of the compound determines the mole ratio between the different species involved in the chemical formula. In this case, the 2:1 ratio of Al3+ to Al2(SO4)3 allows us to determine the number of moles of Al3+ based on the given amount of Al2(SO4)3.

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Answer:

All answers given in the photo

Answer:

The electron e^- is found outside the nucleus hope this helps. the proton and the neutron is found inside the nucleus leaving only the electron

Heat is transmitted to the surroundings as follows: molecules collide with the glass, and the glass molecules then transmit that energy to the outside.

Heat energy is lost when molecules collide in a chemical reaction.

According to this question, a reaction is occuring in a test tube. The reaction involves a collision of molecules that results in the loss of heat energy.

This energy is transmitted to the surroundings as follows when molecules collide with the glass, and the glass molecules then transmit that energy to the outside.

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Answer:

Explanation:

1)inside the fume hood

2)an erupting volcano

3)many molecular collisions occurring quickly

4)Molecules collide with the glass, and the glass molecules then transmit that energy to the outside.

5)Heat and matter can both transfer between the system and the surroundings.

Answer:48

Explanation:

Answer:  3. 0.125 X 10”23 molecules

Explanation:

when P and T are constant the coeficient V/n is constant too:

In this case we have V1, n1 and n2 (the sum of the initial 0.79mols plus the added 0.24mols) and the ask for V2 so we solve for V2 and use the data provided in the text

Forming solute solvent interaction - Endothermic

Breaking solvent solvent interaction - exothermic

Breaking solute solute interaction - exothermic

Endothermic reactions are reactions that absorb energy from their surroundings, usually in the form of heat. These reactions are characterized by a decrease in temperature and the absorption of heat energy by the reaction. For example, dissolving ammonium nitrate in water is an endothermic reaction because it absorbs heat from the surrounding environment, causing the water to cool.

Exothermic reactions are reactions that release energy to their surroundings, usually in the form of heat. These reactions are characterized by an increase in temperature and the release of heat energy by the reaction. For example, the combustion of a hydrocarbon fuel such as gasoline is an exothermic reaction because it releases heat energy to the surrounding environment, causing the temperature to increase.

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Answer:

7

Explanation:

just add p has 1 o has 4 and h has 2

Balance the equation for the decomposition of aluminum chloride into its elements is 2AlCl₃ → 2Al + 3Cl₂

Decomposition reactions are processes in which chemical species break up into simpler parts and here given compound is aluminum chloride is hexahydrate is thermally decomposed to alumina by sequential treatment in two dense fluidized bed decomposers the first decomposer being operated at a temperature of about 200° to 400° C and the second at a temperature of about 900° to 1100° C

Here we have to write and balance the equation for the decomposition of aluminum chloride into its elements so balanced equation for aluminum chloride for decomposition is

2AlCl₃ → 2Al + 3Cl₂

2 mole of AlCl₃ gives 2 mole of Al and 3 mole of Cl₂

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Answer: the process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2. This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.

Explanation:

Written Answer: Covalent bonds hold atoms together in molecules and polyatomic ions where as intermolecular forces hold molecules together in a liquid or solid. Intermolecular forces are generally much weaker than covalent bonds.

Explanation/Evidence: "In contrast to intramolecular forces, such as the covalent bonds that hold atoms together in molecules and polyatomic ions, intermolecular forces hold molecules together in a liquid or solid. Intermolecular forces are generally much weaker than covalent bonds."

The species to be arranged are;

Sr2+, N3-, Li+, Ne, Br-, B3+, Al3+, He, Y3+

Answer:

Group A (10 electron species)

Al^3+, Ne, N^3-

Group B (36 electron species)

Sr^2+, Y^3+, Br^-

Group C ( 2 electron species)

He, Li^+, B^3+

Explanation:

Atoms and ions that have the same electron configuration are said to be isoelectronic. The species may not belong to the same group in the periodic table but are connected by the fact that they all have the same number of electrons. Cations and anions may belong to the same group of isoelectronic species provided that they all have the same number of electrons and the same electronic configuration.

Hence, in each group of isoelectronic species, one electronic configuration can be written for all the species and it will accurately represent the number of electrons for all species in the group since they have the same number of electrons.

For instance, all group C members have the electronic configuration, 1s2. This means that they all possess only two electrons.

Answer:

answer is c

Explanation: cause there breaking it

To see the total number of atoms we need to multiply coefficient which is written in foot of the molecule or element to the number that is written on the foot of that element

The balanced reaction is

2 Al(s) + 2 KOH(aq) + 4 H₂SO₄(aq) + 22 H₂O(l) → 2 KAl(SO₄)₂·12H₂O(s) + 3 H₂(g)

Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side

The unbalanced equation is

Al(s) + KOH(aq) +  H₂SO₄(aq)→  KAl(SO₄)₂·12H₂O(s)

sulfur atoms on reactant side is 1 while on the product side it is 2 so multiply  H₂SO₄ by 2

Al(s) + KOH(aq) +  2H₂SO₄(aq)  →  KAl(SO₄)₂·12H₂O(s)

Now add    H₂O(l) and H₂(g) to balance oxygen and hydrogen. The balanced equation becomes

2 Al(s) + 2 KOH(aq) + 4 H₂SO₄(aq) + 22 H₂O(l) → 2 KAl(SO₄)₂·12H₂O(s) + 3 H₂(g)

Thus the balanced equation is

2 Al(s) + 2 KOH(aq) + 4 H₂SO₄(aq) + 22 H₂O(l) → 2 KAl(SO₄)₂·12H₂O(s) + 3 H₂(g)

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Mass, moles and the use by firefighters are not sufficient to determine the identity of a substance. To identify a substance, more information such as chemical and physical properties, chemical reactions, and spectral data are typically required.

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Answer:

Ph of the enzyme -catalyzed reaction = 6.77

Explanation:

Given data:

concentration phosphate buffer =  0.1 m

pka. = 6.86  

concentration of acid in the reaction = 0.005 m

Determine the  Ph at the end of the reaction

For a balanced buffer solution ; Acid amount = base amount

first we will determine the concentration of acid and base in relation to the buffer

acid = 0.1 / 2 = 0.05

base = 0.1 /2 = 0.05

The chemical reaction of the buffer can be expressed as attached below

PH = pka + log \((\frac{0.045}{0.055} )\) =

     = 6.86 + log ( 0.8181 ) = 6.77

To calculate the percentage of yield we use the following formula:

percent yield = (Actual Yield/Theoretical Yield) x 100%

For trial 1:

actual yield: 0.509

theoretical yield: 0.52

percent yield: (0.509/0.52) x 100%

percent yield: 97.9%

For trial 2:

actual yield: 0.672

theoretical yield: 0.69667

percent yield: (0.672/0..69667) x 100%

percent yield: 96.5%

Answer: Trial 1: 97.9%

Trial 2: 96.5%

Answer:

Molality = 8.57 m

Explanation:

Given data:

Molarity of solution = 5.73 M

density = 0.9327 g/mL

Molality of solution = ?

Solution:

Molality = moles of solute / kg of solvent.

Kg of solvent:

Mass of 1 L solution = density× volume

Mass of 1 L solution = 0.9327 g/mL × 1000 mL

Mass of 1 L solution = 932.7 g

Mass of solute:

Mass of 1 L = number of moles  × molar mass

Mass = 5.73 mol  × 46.068 g/mol

Mass = 263.97 g

Mass of solvent:

Mass of solvent = mass of solution - mass of solute

Mass of solvent = 932.7 g - 263.97 g

Mass of solvent = 668.73 g

In Kg = 668.73 /1000 = 0.6687 Kg

Molality:

Molality = number of moles of solute / mass of solvent in Kg

Molality = 5.73 mol /  0.6687 Kg

Molality = 8.57 m

Considering the definition of molality , you obtain that the molality of a 5.73 M ethanol (C₂H₅OH) solution whose density is 0.9327 g/mL is 8.57 \(\frac{moles}{kg}\).

Molality is the ratio of the number of moles of any dissolved solute to kilograms of solvent.

The Molality of a solution is determined by the expression:

\(Molality=\frac{number of moles of solute}{kilogramof solvent}\)

You have a 5.73 M ethanol (C₂H₅OH) solution whose density is 0.9327 g/mL.

Molarity is the number of moles of solute that are dissolved in a certain volume.

In this case, taking into account that the volume considered is 1 L, the number of moles of solute is 5.73 moles.

On the other side, density is the ratio of the weight (mass) of a substance to the volume it occupies. So, being 1 mL= 0.001 L, 0.9327 g/mL means that you have 0.9327 grams per 1 mL or 932.7 g per 1 L.

So, being the mass of solution calculated as number of moles multiplied by the molar mass, and being the mass of the solution 932.7 grams in 1 L, the mass of water is:

Mass of solvent = mass of solution - mass of solute

Mass of solvent = mass of solution - number of moles× molar mass

Mass of solvent = 932.7 g - 5.73 mol× 46.068 g/mol

Mass of solvent = 932.7 g - 263.97 g

Mass of solvent = 668.73 g= 0.66873 kg

Then, the molality can be calculated as:

\(Molality=\frac{5.73 moles}{0.66873 kg}\)

Solving:

molality= 8.57 \(\frac{moles}{kg}\)

Finally, the molality of a 5.73 M ethanol (C₂H₅OH) solution whose density is 0.9327 g/mL is 8.57 \(\frac{moles}{kg}\).

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Answer:

During complete oxidation of the fatty acid CH3(CH2)14COOH, eight molecules of acetyl-CoA are produced, and the fatty acid goes through the β-oxidation cycle seven times.

Explanation:

In the β-oxidation of fatty acids, an acetyl-CoA molecule is removed from the fatty acid chain after every β-oxidation cycle that the fatty acid undergo, leaving behind a fatty acyl-CoA molecule shortened by two cabon atoms..

The removal of the acetyl-CoA molecule starts from the carboxyl end and shortens the fatty acid molecule by two carbon units. Successive β-oxidation cycles results in the complete oxidaton of the fatty acid molecle to acetyl -CoA molecules.

The compound CH3(CH2)14COOH, is a 16-carbon saturated fatty acid molecule known as palmitic acid.. It undergoes seven passes through the β-oxidation cycle to yield eight molecules of acetyl-CoA with each cycle yielding an acetyl-CoA molecule and a fatty acyl-CoA shortened by two carbon atoms. Finally, the seventh step yields two acetyl-CoA molecules.

During complete oxidation of CH3(CH2)14COOH, eight (8) molecules of acetyl-CoA are produced, and the fatty acid goes through the β-oxidation cycle seven (7) times.

In conclusion, during complete oxidation of CH3(CH2)14COOH, eight (8) molecules of acetyl-CoA are produced, and the fatty acid goes through the β-oxidation cycle seven (7) times.

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Answer:

Life in the Han Dynasty (206 BCE - 220 CE) differed significantly from today in family, government, social structure, religion, and trade. For example, the Han Dynasty emphasized a patriarchal family structure, where the eldest male held authority, and filial piety was highly valued. In contrast, contemporary societies embrace more egalitarian family dynamics with shared decision-making.

The government system of the Han Dynasty relied on a centralized bureaucracy and emphasized meritocracy, while modern societies often adopted democratic systems. Socially, the Han Dynasty followed a hierarchical model influenced by Confucian principles, whereas contemporary societies strive for greater equality and social mobility.

Religion in the Han Dynasty combined Confucianism, Taoism, and Buddhism, whereas modern societies exhibit diverse religious beliefs. Lastly, trade in the Han Dynasty thrived along the Silk Road, while modern trade was globally interconnected and facilitated by technological advancements. These differences highlight the evolution of society over time.

Explanation:

The temperature at which a solid transforms into a liquid at atmospheric pressure is referred to as the liquid’s melting point.

The fact that water boils at a greater temperature than fluorine makes option C the correct choice. The melting point of water is zero degrees Celsius (32 degrees F). Depending on the atmospheric pressure, different amounts of water will boil at different temperatures. When purified water reaches its boiling point at sea level, it does so at 212 degrees Fahrenheit (100 degrees Celsius).

Compared to fluorine, water has a greater boiling point. Regarding the melting and boiling points of water and fluorine molecules, this statement is accurate.

The temperature at which a substance's solid and liquid phases are in equilibrium is known as its melting point. A temperature at which a substance's vapour pressure reaches its boiling point.

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Statement C; They are 0°F and 100°F, respectively, correctly describes the melting and boiling points of water. But Instead of F it should be degree Celsius.

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Answer:

Here's what I get  

Explanation:

1. POCl₃

(a) Lewis structure

Set P as the central atom, with O and Cl atoms directly attached to it.

Electrons available = P + O + 3Cl = 5 + 6 + 3×7 = 11 + 21 = 32

Arrange these electrons to give every atom an octet. Put a double bond between P and O.

You get the structure shown below.

(b) Geometry

There are four bond pairs and no lone pairs about the P atom.

Electron pair geometry — tetrahedral

    Molecular geometry — tetrahedral

(c) Ideal bond angles

Tetrahedral bond angle = 109.5°

2. AlCl₆³⁻

(a) Lewis structure

Set Al as the central atom, with the Cl atoms directly attached to it.

Electrons available = Al + 6Cl + 3(-) = 3 + 6×6 +3 = 6 + 36 = 42

Arrange these electrons to give every atom an octet. Assign formal charges.

You get the structure shown below.

(b) Geometry

There are six bond pairs and no lone pairs about the Al.

Electron pair geometry — octahedral

    Molecular geometry — octahedral

(c) Ideal bond angles

        Axial-equatorial =  90°

Equatorial-equatorial = 120°

                 Axial-axial = 180°

we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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Answer:

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to draw this Lewis dot structure by firstly realizing P has five valence electrons and F has seven because they are in groups VA and VIIA respectively, which means that the central atom is P with three F atoms around it as shown on the attached.

Also notice each fluorine atom has three lone pairs as their atoms just need one bond to complete the octet and the P atom has one lone pair as it needs three bonds to complete it.

Regards!

It is a salt formed from the potassium cation (K+) and the phosphate anion (H2PO4-). This salt is considered monobasic because it contains one replaceable hydrogen ion (H+).

KH2PO4 is actually potassium dihydrogen phosphate, not potassium phosphate monobasic. Potassium phosphate monobasic, or monopotassium phosphate, is correctly represented by the chemical formula KH2PO4. It is a salt formed from the potassium cation (K+) and the phosphate anion (H2PO4-). This salt is considered monobasic because it contains one replaceable hydrogen ion (H+).

On the other hand, potassium dihydrogen phosphate, or K2HPO4, is a different compound. It is formed from the potassium cation (K+) and the hydrogen phosphate anion (HPO4^2-). This compound is considered dibasic because it contains two replaceable hydrogen ions (H+).

Therefore, KH2PO4 is correctly identified as potassium phosphate monobasic, while K2HPO4 is potassium dihydrogen phosphate.

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