Given the reaction below, which is the being reduced?
Mg + Cl2 Right arrow. Mg2+ + 2Cl–
2CI–
CI2
Mg
Mg2+

Answer:

4Al +3O₂ → 2Al₂O₃

Explanation:

To balance the chemical equation, start by identifying the number of atoms of each element on both sides of the equation.

Al +O₂ → Al₂O₃

Reactants (right-hand side of the arrow)

Al➭ 1

O➭ 2

Products (left-hand side of the arrow)

Al➭ 2

O➭ 3

Balancing the equation means that we need to ensure the number of atoms of each element is the same on both sides of the equation.

Let's balance the number of O atoms.

Al +3O₂ → 2Al₂O₃

Reactants

Al➭ 1

O➭ 3(2)= 6

Products

Al➭ 2(2)= 4

O➭ 2(3)= 6

Balancing the number of Al atoms:

4Al +3O₂ → 2Al₂O₃

Reactants

Al➭ 4

O➭ 6

Products

Al➭ 4

O➭ 6

The equation is now balanced.

Additional:

For a similar question on balancing equations, do check out the following!

Answer:

1. Dehydration of alcohols

2. Dehydrohalogenation of alkyl halides

3. Decarboxylation of carboxylic acids

4. Pyrolysis of esters

5. Deamination of amino acids

6. Dealkylation of ethers

7. Dehalogenation of aryl halides

8. Dehydration of amides

9. Dehydrogenation of alkanes

10. Dehydrogenation of alkenes.

Explanation:

The formula below can be used to create a \(0.93 M\) NaCl solution in a \(250 mL\)   volumetric flask:

Molarity is calculated as moles of solute per litre of solution. To solve for moles of solute, rewrite the formula as follows:

Molarity times the volume of the solution in litres equals moles of solute. The volume of NaCl solution required to create the  \(0.93 M\) Solution must first be determined.

We must fill the flask with NaCl solution until the mark on the neck of the flask because we are using a  \(250 mL\) Volumetric flask. Hence, we require \(250 mL\) Of NaCl solution.

To change mL to L:

\(250 mL / 1000 mL/L = 0.25 L\)  Is the volume of the solution in litres.

Now, we can determine how many moles of NaCl are required:

\(0.93\) M times  \(0.25 L\) equals  \(0.2325\) Moles of NaCl.

Using its molar mass, we can finally convert moles of sodium chloride into grams of sodium chloride:

NaCl's mass is equal to its moles times its molar mass.

\(58.44\) g/mol is the molar mass of NaCl.

NaCl mass is equal to \(0.2325\) moles times \(58.44\) g/mol, or \(13.59 g\).

Therefore, \(13.59\) grams of NaCl are required to make \(0.93 M\) in a \(250 mL\)Volumetric flask. The solution, rounded to the hundredths place, is \(13.59\) g.

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Answer:

The victim has been dead for approximately 12 hours.

Explanation:

Algor mortis, or the cooling of the body after death, is a reliable way to estimate time of death. The average body temperature is 98.6 degrees Fahrenheit, so 85.2 degrees Fahrenheit would be 12 hours after death.

Answer:

Magnesium loses it's two electrons and Oxygen gains two electrons. Magnesium is now a cation and Oxygen is now an anion. Both become stable.

Explanation:

The type of electron transfer which happens between the Mg and O atom is a complete transfer of electrons from the Mg atom to the O atom in an ionic bond.

The most electropositive electron usually is usually the donor while the most electronegative elements is the acceptor.

As evident in the case above;

Ultimately, an ionic bond is formed between the Mg and O atoms.

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i don't remember yeah yosj

The electron configuration of Cu²+ ion  - \(1s^2 2s^2 2p^6 3s^2 3p^6 3d^9\)

The electron configuration of Co³ + ion - \(1s^2 2s^2 2p^6 3s^2 3p^6 3d^6\)

When we are talking about the electron configuration, we are talking about the way that the electron is arranged around the nucleus of the atom. We know that electrons in the atom can be arranged in energy levels in the atom of the element.

We are asked to write here the electron configuration of the copper II ion and that of the cobalt III ion. In either case, we have to know that electrons have been removed from the neutral atom. In the first case, there are two electrons that have been removed while in the second case, there are three electrons that have been removed.

Thus in writing the electron configuration of the specie we have to take into account the number of the electrons that have been lost due to ion formation. Recall that the ground state is the lowest energy state of the chemical specie.

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In the combustion of 28.0 g of gasoline, 1348.1 kilojoules of energy are released.          

To find the energy released, we need to convert the energy in kilocalories to kilojoules.

We need to remember that:

Hence, the energy in kJ is:

\( E = 322 \:kcal*\frac{4.1868 \:J}{1 \:cal}*\frac{1000 \:cal}{1 \:kcal}*\frac{1 \:kJ}{1000 \:J} = 1348.1 \:kJ \)

Therefore, 1348.1 kilojoules of energy are released.

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Answer:

sorry my phone died lol but here are the answers

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2.5  A° is  wave length associated with an electron travelling a 40% velocity of light​.

40% velocity of light​=40/100×3×10^8

40% velocity of light=1.2×10^8 m/s

\(\lambda=c/v\)

\(\lambda\)=3×10^8/1.2×10^8 m/s=2.5 A°

Since the relationship between wave frequency and wavelength is inverse, gamma rays have extremely tiny wavelengths that are only a small portion of the size of atoms, whereas other wavelengths can extend as far as the universe. No of the medium they are passing through, electromagnetic radiation's wavelengths are typically expressed in terms of the vacuum wavelength, but this isn't always stated explicitly.

The wavelength of electromagnetic radiation affects how it behaves. Speed of light = wavelength x frequency Energy = Planck's constant x frequency Wave number = 1/wavelength in cm. The wavelengths of different parts of the electromagnetic spectrum are displayed together with a rough approximation of the wavelength size.

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The triple point pressure or the pressure in atm at which the solid, liquid, and gas phases of SO₂ can coexist at the same time is 0.0165 am

The triple point of a substance is the temperature and pressure at which a substance can exist in equilibrium in the liquid, solid, and gaseous states.

Different substances have different triples points.

The triple point of pure water is at 0.01°C and 4.58 mmHg.

The triple point of sulfur dioxide is 197.64 K and 0.0165 atm.

Therefore, the pressure in atm at which the solid, liquid, and gas phases of SO₂ can coexist at the same time is 0.0165 am

In conclusion, the triple point of substance varies.

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D.) HF of the following molecules contain POLAR COVALENT bonds

A polar covalent link holds a hydrogen atom and a fluorine atom together in a hydrogen fluoride (HF) molecule.

The molecule that has a polar covalent link in it is c. H-F since fluorine and hydrogen atoms have different electronegativities, which causes the bond to become polarised.

A polar molecule is one that has a little positive charge on one end and a slight negative charge on the other. A polar molecule is a diatomic compound, such as HF, that has a polar covalent link.

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Step 1: Write the balanced "molecular equation:

\(2HI(aq) + CrCO₃ (s) → CrI₂ (s) + H₂O(l) + CO₂(g)\)

Step 2: Carbon dioxide and water are written in molecular form. Consult the solubility and net ionic equation rules on the information page to determine which of the other substances will dissociate:

\(2HI(aq) + CrCo₃ (s) → Crl₂ (s) +H₂O(l)+CO₂(g)\)

yes no yes

Step 3: Dissociate all soluble salts, strong acids, and strong bases (except calcium hydroxide), Leave together all "not soluble" salts and weak acids or bases:

\( {2H₂O}^{ + } (aq) + {2I}^{ - } (aq) + CrCO₃ (s)→ {Cr}^{2 + } (aq) + {2I}^{ - }(aq) + 3H₂O(l) + CO₂(g)\)

Step 4: Cross out "spectator lons that appear on both sides of the reaction (these lons do not participate in the chemistry) and rewrite the "net" reaction using the smallest possible coefficients:

\( {2H₂O}^{ + } (aq) + CrCO₃ (s) →3H₂O + CO₂ + {Cr}^{2 + } \)

Answer:

Largest: Mg

Smallest: Cl

Explanation:

Answer:

2C2 H6 +7O2=4co2+6h2o+heat

In the ideal gas law, the temperature of the hydrogen gas determined if the volume and pressure of the gas is known.

The ideal gas law states that the pressure of ideal gas is directly proportional to the absolute temperature of the gas.

PV = nRT

where;

The temperature of the gas is determined as follows;

\(T = \frac{PV}{nR}\)

Thus, we can conclude that in the ideal gas law, the temperature of the hydrogen gas determined if the volume and pressure of the gas is known.

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Gold's atomic construction is bigger than tin because of the existence of more protons and neutrons.

The disposting of atoms in gold follows what's called a "​face-centered cubic" (fcc) structure. Put directly, the atoms in gold form cubes, with an atom at each of the districts, and another atom in the center of each of the faces (you can see what this looks like in the image below). Gold is an element.

An atom of gold carries 79 protons, 79 electrons, and (most commonly) 118 neutrons, making it among the dense of naturally happen. Gold is a chemical element with 79 protons in each atomic nucleus. Every atom carrying 79 protons is a gold atom and all gold atoms.

So we can conclude that gold has the chemical formula Au. Gold atoms join together in a giant metallic structure. Atomic Structure.

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A. acetid acid is the most soluble in water among the pentanol, butanoic acid, pentanal

Acetic acid is the most water-soluble among the given options. Acetic acid is a carboxylic acid and is highly polar, meaning that it has a high affinity for water. The presence of the carboxyl group (-COOH) gives acetic acid the ability to form hydrogen bonds with water molecules. Pentanol, butanoic acid and pentanal are less polar than acetic acid, they have lower solubility in water. Among them, pentanol has the highest solubility, but still it is less polar than acetic acid, followed by butanoic acid, and pentanal is the least water-soluble among the options.

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Answer:

\(\frac{1000}{3}\)  

Explanation:

Given problem:

    log 9x - log 3  = 3

To solve this problem, we need to find the value of x for which when the expression is simplified, we would a solution of 3;

   From log rules;

          log a - log b  = log \(\frac{a}{b}\)  

 So;

      log 9x - log 3 = 3

      log( \(\frac{9x}{3}\))   = 3

        log 3x  = 3

 So;

            3x  = 10³

              x  = \(\frac{1000}{3}\)  

Answer:

The experiment tested the pH levels of various substances by using universal indicator and observing the color change. The hypothesis was that substances with a pH closer to 7 would require smaller amounts of indicator for a color change compared to substances with more extreme pH levels. The data collected supported this hypothesis, as substances with pH closer to 7 required smaller amounts of indicator. This indicates that the strength of the acid or base affects the amount of indicator needed for a color change. In the final step of the experiment, the universal indicator was added to a substance until the color stabilized, indicating the pH level. The final color observed indicates the pH level of the substance. While this experiment is useful in determining the approximate pH level of a substance, it cannot determine a specific pH. Acid and base indicators are important as they allow us to determine the pH level of a substance, which can be useful in everyday life, such as in pool maintenance or testing the acidity of soil for gardening.

Explanation:

Answer:

Antacids are defined as relative simply assembled salts and salt-like compounds which neutralize acids. The answers for multiple questions are given below.

1)

Number of moles of H⁺ = molarity of HCl x volume (L)

= 0.1034 x 0.03236

= 0.003346 mol

2)

The total moles of OH⁻ = molarity x volume (L)

= 0.1506 x 0.01172

= 0.001765 mol

3)

Difference (between total moles of H⁺ added and total moles of OH⁻ added) = 0.003346 - 0.001765

= 0.001581 moles

4)

Since 0.001765 moles of NaOH reacted with same number of moles of HCl , so the moles of HCl reacted with antacid will be 0.001581 moles.

Each HCl mole react with one equivalent of antacid. So number of equivalents of antacid in sample will be 0.001581 eq.

5)

Number of antacids per gram of antacid = 0.001581 / 0.326

= 0.00485 eq antacid per gram

6)

0.001581 eq is present in 0.326 g or 326 mg of antacid

so eq present in 650 mg tablet : ( 650 x 0.001581) / 326

= 0.003152 eq per tablet

Eq in 1 bottle : 0.003152 x 100

= 0.3152 eq/bottle

So the cost per equivalent : 5.99 / 0.3152

= 19 $/eq

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The percent yield of the water is 33.3%.

We know that the reaction that takes place between hydrogen and oxygen to give water is; \(2H_{2} (g) + O_{2} (g) ----- > 2H_{2}O(g)\). We now need to find the number of moles of hydrogen = 4 g/2 g/mol = 2 moles

Now;

If 2 moles of hydrogen reacts with 1 moles of oxygen

We can see that oxygen is the limiting reactant in this case.

1 mole of oxygen produces 2 moles of water

1.5 moles of oxygen produces 1.5 * 2/1

= 3 moles of water

Then the theoretical yield of water = 3 moles * 18 g/mol = 54 g

Percent yield = Actual yield / theoretical yield * 100/1

= 18/54 * 100/1

= 33.3%

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There are several physical methods that can be used to monitor the rate of a chemical reaction are; Spectrophotometry, Conductometry, and Turbidity measurement

Spectrophotometry involves measuring the changes in the intensity of light absorbed or transmitted by a solution during a chemical reaction. Spectrophotometers are used to measure the amount of light absorbed or transmitted by a sample at different wavelengths.

Conductometry  involves measuring the changes in electrical conductivity of a solution during a chemical reaction. Conductivity meters are used to measure the electrical conductivity of a solution, which can change as the concentration of ions in the solution changes during a chemical reaction.

Turbidity measurement involves measuring the changes in the clarity or turbidity of a solution during a chemical reaction. Turbidimeters or nephelometers can be used to measure the amount of light scattered by a sample, which can change as particles form or dissolve during a reaction.

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--The given question is incomplete, the complete question is

"What are the physical methods of monitoring the rate of a chemical reaction?"--

Answer

The sun releases approximately 384.6 septillion watts (3.846×1026 W) of energy, this is almost equal to 9.192×10^10 megatons per second.

Answer:

The solubility of alkaline earth metal hydroxides in water increases down the group because the size of the metal cation increases as you move down the group. This increase in size results in a decrease in the cation's charge density, which makes it less able to attract and hold onto hydroxide ions. As a result, the hydroxides become more soluble in water as you move down the group. Additionally, the lattice energies of the hydroxides decrease down the group, making it easier to break apart the crystal lattice structure and dissolve the hydroxides in water.

A 13.0kg iron weightlifting plate has a volume of 1650cm³. Therefore, 7.87g/cm³ is the density of iron plate.

The density of a substance is described as its weight per unit volume. In other words, density is the mass-to-volume ratio or weight per unit volume. It quantifies how much "stuff" a thing possesses inside an unit of volume (cubic meter or cubic centimeter).

Density is a measure of how closely stuff is packed together. Archimedes, a Greek scientist, developed the density principle.

density= mass / volume

            = 13000/  1650

            =7.87g/cm³

Therefore, 7.87g/cm³ is the density of  iron plate.

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According to the question the rate of the reaction at =0 is 8.0 × 10−9 M2·s−1.

A reaction is an action or response to a stimulus. It can be a physical or mental response to the environment, or it can be a chemical reaction that occurs when two or more substances interact with each other. Reactions can be conscious or unconscious, and can involve emotions, memories, thoughts, or behaviors. All reactions are the result of some kind of change that occurs in the body or environment. Reactions can be beneficial or detrimental, depending on the situation. Learning how to recognize and control your reactions can help you make better decisions and lead a healthier, more successful life.

The rate of the reaction at =0 can be calculated by substituting the values of [O3] and [NO] into the rate law:
rate of reaction=[O3][NO]
= (4.0 × 10−4 M) (2.0 × 10−5 M)
= 8.0 × 10−9 M2·s−1
Therefore, the rate of the reaction at =0 is 8.0 × 10−9 M2·s−1.

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