Ifa container of nitrogen and oxygen gas holds 2. 50 atm of N2 gas and 1. 50 atm of O2 gas, what


is the total pressure inside the container?

From 39.0 g of the ore, it is possible to obtain approximately 3.28 g of iron.

To determine the mass of iron that can be obtained from the given ore, we need to calculate the amount of iron in the ore based on the percentage composition.

Given;

Mass of the ore = 39.0 g

Percentage of Fe₂O₃ in the ore = 24.0%

Calculate the mass of Fe₂O₃ in the ore;

Mass of Fe₂O₃ = (Percentage of Fe₂O₃ / 100) × Mass of the ore

= (24.0 / 100) × 39.0 g

= 9.36 g

Calculate the molar mass of Fe₂O₃;

Molar mass of Fe₂O₃ = 2 × molar mass of Fe + 3 × molar mass of O

= 2 × 55.845 g/mol + 3 × 16.00 g/mol

= 159.69 g/mol

Calculate the moles of Fe₂O₃;

Moles of Fe₂O₃ = Mass of Fe₂O₃/Molar mass of Fe₂O₃

= 9.36 g / 159.69 g/mol

= 0.0586 mol

Calculate the moles of Fe;

Since the molar ratio between Fe₂O₃ and Fe is 2:2, the moles of Fe are the same as the moles of Fe₂O₃.

Moles of Fe = 0.0586 mol

Calculate the mass of Fe:

Mass of Fe = Moles of Fe × Molar mass of Fe

= 0.0586 mol × 55.845 g/mol

= 3.28 g

Therefore, from 39.0 g of the ore, it is possible to obtain approximately 3.28 g of iron.

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The toxic chemicals is different from the safe chemical because the stronger attraction between it's molecule than the safe chemical.it molecule now move away from each. The correct option is C

Toxic chemical can be defined as a substance that can be poisonous or cause health effects. Some examples of toxic chemical include ammonia, acid, bleach, chlorine, and carbon monoxide.

Therefore toxins are substances created by plants and animals that are poisonous to humans. Toxins may also include some medicines that are helpful in small doses but poisonous in large amounts.

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Answer:

The method involves students exhaling air using a plastic straw into the over-titrated acid-base mixture, which turned pink-colored with phenolphthalein indicator.

Answer:

It is the wettest layer of the atmosphere.It extends upto 10km upward from sea level.

First of all, Z is unknown. I hope it is a mistake.

        Now, it is given that the element X has nineteen electrons. This proves that X is actually Potassium.

        As per the periodic table, both Potassium and Lithium belongs to group 1 as their valency is 1 because of the presence of only one electron in the outermost shell of electrons i.e., they lose an electron during a chemical reaction to form a stable compound. Furthermore, both are metallic.

        Magnesium belongs to group 2 and hence its valency is two, which is different from potassium though it is metallic. Similiarly, bromine belongs to group 17 and gains one electron during a reaction in contrast to potassium.

( No internal links available for reference. For clarification, check the periodic table).

Answer:

Different substances have different molecular masses. Thus, equal masses have different numbers of atoms, molecules, or moles. On the other hand, equal numbers of moles of different substances have different masses.

Answer:

true?

Explanation:

The molarity of the 12 mL HCl solution needed to neutralise 20 mL 0.010 M Ca(OH)₂ solution is 0.033 M

2HCl + Ca(OH)₂ —> CaCl₂ + 2H₂O

From the balanced equation above,

The mole ratio of the acid, HCl (nA) = 2

The mole ratio of the base, Ca(OH)₂ (nB) = 1

MaVa / MbVb = nA / nB

(Ma × 12) / (0.01 × 20) = 2

(Ma × 12) / 0.2  = 2

Cross multiply

Ma × 12  = 0.2 × 2

Ma × 12 = 0.4

Divide both side by 12

Ma = 0.4 / 12

Ma = 0.033 M

Thus, the molarity of the HCl solution is 0.033 M

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The correct option among the following options that are the properties of acidic solutions are:a. Sour tasteb. Turns litmus paper redc.  Option A is correct .

Releases hydrogen ions (H+)d. All of the above

Thus, the correct option is (d) All of the above.

An acidic solution is a solution that has a higher concentration of hydrogen ions (H+) than hydroxide ions (OH-). The acidity of a solution is determined by the concentration of H+ ions present in the solution. There are several properties of acidic solutions, which are given as follows:

                                   Sour taste:Acidic solutions have a sour taste. For example, lemon, vinegar, etc.Turns litmus paper red:Acidic solutions turn blue litmus paper to red.

                                      Releases hydrogen ions: Acidic solutions release hydrogen ions (H+). When an acidic solution dissolves in water, it ionizes and releases H+ ions.All of the above:

Therefore, the correct option is (d) All of the above.

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The molarity of HC2H3O2 is approximately 1.95 M based on the given information and the balanced equation.

To find the molarity of HC2H3O2, we can use the balanced equation and the concept of stoichiometry.

From the balanced equation:

1 mole of NaOH reacts with 1 mole of HC2H3O2.

We are given the volume and molarity of NaOH used in the reaction:

Volume of NaOH = 39.0 mL = 0.0390 L

Molarity of NaOH = 1.00 M

We can use the equation:

Molarity of NaOH × Volume of NaOH = Molarity of HC2H3O2 × Volume of HC2H3O2

Plugging in the values:

1.00 M × 0.0390 L = Molarity of HC2H3O2 × 20.0 mL

Converting the volume of HC2H3O2 to liters:

20.0 mL = 0.0200 L

Simplifying the equation:

0.0390 = Molarity of HC2H3O2 × 0.0200

Solving for the Molarity of HC2H3O2:

Molarity of HC2H3O2 = 0.0390 / 0.0200 ≈ 1.95 M

Therefore, the molarity of HC2H3O2 is approximately 1.95 M based on the given information and the balanced equation.

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When fossil fuels are burned, they release large amounts of carbon dioxide, a greenhouse gas, into the air.

What is Greenhouse gas ?

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Answer:

Energy from the sun allows the plant to grow and make its own food.

Explanation:

From this image, we clearly see the leaves exposed to sun which supplies solar energy to the plant.

Answer:

Energy from the sun allows the plant to grow and make its own food

Explanation:

14,400 gallons of water can be filtered by the new water filter invented by the company.

It is given that the filter can process 10 gallons of water per minute.

So In an hour:

10 gallons per minute x 60 minutes = 600 gallons in 1 hour.

And in a day:

24 hours x 600 gallons per hour = 14,400 gallons in 24 hours.

Hence, 14,400 gallons of water can be filtered.

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The solubility product constant (Ksp) for BaCrO4 is 1.17 x 10^-10 at 25°C. a) Solubility of BaCrO4 in pure water at 25°C:

The solubility of BaCrO4 in pure water at 25°C can be found using the following equation:

Ksp = [Ba2+][CrO42-]

where [Ba2+] and [CrO42-] are the molar solubility of BaCrO4 in water.

Since BaCrO4 dissociates to give one mole of Ba2+ and one mole of CrO42-, we can assume that the molar solubility of BaCrO4 is equal to the molar solubility of Ba2+ or CrO42-. Let x be the molar solubility of BaCrO4 in pure water, then:

Ksp = [Ba2+][CrO42-] = x * x = x^2

1.17 x 10^-10 = x^2

x = sqrt(1.17 x 10^-10) = 1.08 x 10^-5 M

Therefore, the solubility of BaCrO4 in pure water at 25°C is 1.08 x 10^-5 M.

b) Solubility of BaCrO4 in a 0.0190 M BaCl2 solution at 25°C:

When BaCrO4 is dissolved in a 0.0190 M BaCl2 solution, it will react with Ba2+ from the BaCl2 solution to form BaCrO4(s). The equilibrium expression for this reaction is:

BaCrO4(s) + Ba2+ + 2Cl- <-> BaCrClO4(s) + 2Cl-

The solubility of BaCrO4 in a 0.0190 M BaCl2 solution at 25°C can be found using the following equation:

Ksp = [BaCrO4][Ba2+] = (x)(0.0190 + x)

Since the initial concentration of Ba2+ in the solution is 0.0190 M, and x is the additional concentration of Ba2+ that comes from the dissolution of BaCrO4, we can assume that the total concentration of Ba2+ in the solution is 0.0190 + x.

The solubility of BaCrO4 in the solution can be found by solving for x:

Ksp = (x)(0.0190 + x)

1.17 x 10^-10 = x^2 + 0.0190x

Assuming x is much smaller than 0.0190 (which is reasonable since Ksp is very small), we can simplify the equation:

1.17 x 10^-10 = 0.0190x

x = 6.14 x 10^-9 M

Therefore, the solubility of BaCrO4 in a 0.0190 M BaCl2 solution at 25°C is 6.14 x 10^-9 M.

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The major distinction between emission and absorption spectra is that an emission spectrum has various colored lines, whereas an absorption spectrum contains dark-colored lines. When electrons return to their original energy levels, this is called emission. When electrons absorb energy, they leap to higher energy levels. When ground-state atoms absorb energy from a radiation source, atomic absorption spectra are created. When neutral atoms in an excited state return to the ground state or a lower-energy state, they release energy, resulting in atomic emission spectra.

The cοncentratiοn οf the sοlutiοn οf beta-carοtene can be calculated by dividing the absοrbance at 490 nm by 1.36 x 10⁵ M⁻¹cm⁻¹.

Tο calculate the cοncentratiοn οf a sοlutiοn οf beta-carοtene, we can use the Beer-Lambert Law, which relates the absοrbance οf a sοlutiοn tο its cοncentratiοn.

The Beer-Lambert Law is given by:

A = ε * c * l

where A is the absοrbance, ε is the mοlar absοrptivity, c is the cοncentratiοn, and l is the path length.

In this case, we are given the mοlar absοrptivity (ε) οf beta-carοtene at 490 nm as 1.36 x 10⁵ M⁻¹ cm⁻¹ * 1 cm, and we want tο determine the cοncentratiοn (c).

Rearranging the equatiοn, we have:

c = A / (ε * l)

Substituting the values:

A = absοrbance at 490 nm

Let's assume a path length (l) οf 1 cm.

c = A / (1.36 x 10⁵ M⁻¹ cm⁻¹ * 1 cm)

Therefοre, the cοncentratiοn οf the sοlutiοn οf beta-carοtene can be calculated by dividing the absοrbance at 490 nm by 1.36 x 10⁵ M⁻¹cm⁻¹.

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Answer:

Explanation:

The correct reaction that represents the process of neutralization is:

HCl(aq) + KOH(aq) → KCl(aq) + H₂O(l)

Neutralization is a chemical reaction between an acid and a base, which results in the formation of water and a salt. In this case, hydrochloric acid (HCl) is the acid, and potassium hydroxide (KOH) is the base. When they react, they form potassium chloride (KCl) and water (H₂O).

Answer: The Calvin cycle and the Calvin-benson cycle

Explanation:

Answer:

it would have some bacteria considering it would probs take up to 4-6 days for it to grow

Explanation:

The binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond.  Option b

Aminoacyl-tRNA is a complex molecule that plays a crucial role in protein synthesis. It consists of a tRNA molecule covalently linked to an amino acid. The amino acid is attached to the 3' end of the tRNA molecule through an ester bond.

An ester bond is formed between the carboxyl group (-COOH) of the amino acid and the hydroxyl group (-OH) of the ribose sugar at the 3' end of the tRNA molecule. This ester bond is also referred to as an ester linkage. The formation of the ester bond is catalyzed by the enzyme aminoacyl-tRNA synthetase.

The ester bond in aminoacyl-tRNA is essential for protein synthesis. During translation, the aminoacyl-tRNA molecule carries the specific amino acid to the ribosome, where it is incorporated into the growing polypeptide chain. The ester bond is later hydrolyzed, releasing the amino acid for further use in protein synthesis.

In summary, the binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond between the carboxyl group of the amino acid and the hydroxyl group of the ribose sugar in the tRNA molecule.

Option b

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Row reduction provides a method to compute the inverse of an invertible matrix.

The computation of the inverse of a matrix can be achieved through row reduction (also known as Gaussian elimination) because row operations preserve the invertibility of a matrix and can transform it into its reduced row echelon form.When we perform row reduction on a matrix A, we apply a series of elementary row operations, such as swapping rows, multiplying rows by a scalar, or adding a multiple of one row to another. These operations can be represented by elementary matrices.If we perform the same row operations on the augmented matrix [A | I], where I represents the identity matrix of the same size as A, we can transform the left side of the augmented matrix into the reduced row echelon form. The right side will then contain the inverse of A.This is possible because row operations correspond to left multiplication by elementary matrices. Since elementary matrices are invertible, their left multiplication preserves the invertibility of the original matrix.In essence, row reduction transforms the given matrix A into the identity matrix I through a series of elementary row operations. Consequently, the right side of the augmented matrix becomes the inverse of A.

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Answer:

h

Explanation:

Answer:

I think its 8!

Explanation:

please tell me if I'm wrong :<

Answer:

b) heat from the lemonade move to the ice.

Explanation:

he he can only move one way and that is (hot to cold). because of this you know A and b is wrong.

Answer:

A) In aldehydes, the carbon is always joined to at least one hydrogen atom.

Explanation:

Aldehydes and Ketones are organic compounds.

The main difference between them is that aldehydes have the carbon atom attached to at least one hydrogen atom.

In ketones, the carbon is attached to another carbon.

To reiterate, the striking difference between the two families is that in alkanals, a hydrogen atom is directly attached to the carbonyl group while in alkanones, no hydrogen atoms is attached to the carbonyl group but two bulky alkyl groups.

Answer:

makes sugar water

Explanation:

because the sugar dissolves into the water

Answer:

it will be a sugar water

Explanation:

When sugar is mixed into water, it dissolves and forms a homogeneous mixture with the water. The sugar molecules are surrounded by the water molecules and spread out evenly throughout the water, resulting in a solution with altered physical properties.

Answer: Be hard to move it.

Explanation: If you have 1 book, and you put 5 more books on top, then the 6 books will be heavy to move.

Answer:

Galvanization or galvanizing is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which the parts are submerged in a bath of molten hot zinc.

Explanation:

Done