1. 98 g of calcium chloride and 3. 75 g of sodium oxide are combined. Theoretically,


what mass of solid product could be formed from these amounts of reactants? What


is the limiting reactant?

Answer:

Rdd

Explanation:

Dddddddxkdhjsjsjsjkskskskskskskskkskakakkakakakakakakkakakakk

D. He is not an electrolyte.

An electrolyte is a medium containing ions that is electrically conducting through the movement of those ions, but not conducting electrons. This includes most soluble salts, acids, and bases dissolved in a polar solvent, such as water. Upon dissolving, the substance separates into cations and anions, which disperse uniformly throughout the solvent. Solid-state electrolytes also exist. In medicine and sometimes in chemistry, the term electrolyte refers to the substance that is dissolved. Electrically, such a solution is neutral. If an electric potential is applied to such a solution, the cations of the solution are drawn to the electrode that has an abundance of electrons, while the anions are drawn to the electrode that has a deficit of electrons. The movement of anions and cations in opposite directions within the solution amounts to a current. Some gases, such as hydrogen chloride (HCl), under conditions of high temperature or low pressure can also function as electrolytes.[clarification needed] Electrolyte solutions can also result from the dissolution of some biological (e.g., DNA, polypeptides) or synthetic polymers (e.g., polystyrene sulfonate), termed "polyelectrolytes", which contain charged functional groups. A substance that dissociates into ions in solution or in the melt acquires the capacity to conduct electricity. Sodium, potassium, chloride, calcium, magnesium, and phosphate in a liquid phase are examples of electrolytes.

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The density of the unknown liquid has a mass of 7.553g is 0.7553 g/ml

Density is the measurement of how tightly a material is packed together.

Given data:

Weight =7.553g

Volume = 10.0ml

Density =\(\frac{mass}{volume}\)

Density =\(\frac{7.553g}{10.0ml}\)

Density = 0.7553 g/ml

Hence, the density of the unknown liquid has a mass of 7.553g is 0.7553 g/ml.

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Answer:

Explanation:

Answer:

Its a liquid cause it flows

Explanation:

think about it none of the others make sense ice is a solid and its clear

something like a wall can be thick but it doesn't flow

The chocolate chips that are in one mole of chocolate chips is 6.02214 × 10²³ chips.

The mole of a substance is defined as the amount of substance that is my are up of 6.02214 × 10²³ particles and this number is called the Avogadro's number.

This means that 1 mole of substance= 6.02214 × 10²³ of particles that makes up the substance.

The Avogadro's number is a constant used for all substances such as the chocolate chips.

That is to say, one mole of the chocolate chips has a mass of 0.324 g but contains 6.02214 × 10²³ particles of chocolate chips.

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The number of chocolate chips that are included inside one mole of chocolate chips is equal to 6.02214 ×10^23 chips.

The quantity of a material that may be made up of 6.02214 ×10^23 particles is referred to as a mole, and this number is known as Avogadro's number. The mole is the unit of measure used to describe this quantity.

This indicates that there are 6,02214×10^23 particles in one mole of the material, which implies that one mole of the substance is equal to one mole.

Avogadro's number is a constant that is applied to many different kinds of things, including chocolate chips.

In other words, one mole of chocolate chips has a mass of 0.324 g, yet it includes 6.02214 ×10^23 individual chocolate chip particles.

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There are 16 possible stereoisomers for an aldohexose.

For an aldohexose, which is a six-carbon sugar with an aldehyde functional group, the number of possible stereoisomers can be determined using the concept of chiral centers. A chiral center is a carbon atom that is bonded to four different groups. In an aldohexose, there are four chiral centers, one on each asymmetric carbon.

The number of stereoisomers can be calculated using the formula \(2^n\), where n is the number of chiral centers. In this case, since there are four chiral centers, the number of possible stereoisomers is \(2^4 = 16.\)Therefore, there are 16 possible stereoisomers for an aldohexose. Each stereoisomer will have a different arrangement of substituents around the chiral centers, leading to unique three-dimensional structures and properties.

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Answer:

Chemical reactions occur when atoms are separated from each other, joined, or rearranged in a different combination. Atoms of one element, however are never changed into atoms of another element as a result of a chemical reaction.

Explanation:

The numerical value of the Ksp  of \(BaSO_{4}\) is 1.69 * 10^-20.

The Ksp is an equilibrium constant that shows the extent to which a substance is soluble in water. Now consider the fact that \(BaSO_{4}\) is almost insoluble in water.

i) The Ksp of the \(BaSO_{4}\) solution can be obtained from the relation;

Ksp = [\(Ba^{2+}\)] [\(SO_{4}^{2-}\)]

ii) The numerical value of the Ksp is obtained from; [1.30 × 10–10]^2 = 1.69 * 10^-20

iii) The reason for the toxicity of \(BaCO_{3}\) even though it is not more soluble that barium sulfate is that \(BaCO_{3}\) can dissolve in the gastrointestinal tract which is acidic leading to barium poisoning.

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Molarity of the solution 0.2278 M.

Concentration of the aluminum cation  0.2278 M.

Concentration of the chloride anion  0.6834 M.

Molarity is the total number of moles of solute dissolved in 1 liter solution. The unit used is mol/L.

Here,

Aluminium chloride (AlCl₃; 133.34 g/mol) dissolves in water thus:

The balanced equation (I) will be: AlCl₃--> Al₃ + 3.Cl

Molarity is an unit of chemical concentration given in moles of solute (AlCl₃) per liters of solution.

There are 500 mL of solution=0.50 L

The moles of AlCl₃ are:

15.2 g of AlCl₃ × (1 mol/133.34) = 0.1139 moles of AlCl₃

The molarity of the solution is: moles/volumes

= 0.2278 M

In equation (I) you can see that 1 mole of AlCl₃ produces 1 mole of aluminum cation. The mole of potassium cation are:

0.1139 moles × 1 = 0.1139 moles

The concentration is: 0.1139/0.50

= 0.2278 M

According to the equation (I) the moles of AlCl₃ produces 3 moles of Cl, thus, concentration of phosphate anion is

= 0.1139 moles × 3 = 0.3417

Concentration : 0.3417/0.50L

= 0.6834

Hence,

the molarity of the solution = 0.2278 M

the concentration of aluminum cation = 0.2278 M

the concentration of chloride anion = 0.6834 M

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Answer:

Explanation:

The table below indicates the “Molecular Geometry” of the central atom depending on whether the groups of electrons around it are covalent bonds to other atoms or simply lone pairs of electrons.

Answer:

pH=14-pOH

1. B

pOH= 14- pH

2.B

Explanation:

Answer:

1. B

pH=14-pOH

2.B

pOH= 14- pH

Explanation:

Answer:

Positive

Explanation:

The nucleus of an atom has a net positive charge  which is balanced by the negative charge of the electrons residing in the orbital of an atom. The reason why the nucleus of an atom is positively charged is because it contains two sub atomic particles;

The protons and neutrons. In terms of charge, the proton is positively charged and the neutron is neutral. This means the neutron does not partake in the charge of the nucleus. Hence the net charge of the nucleus is decided by the protons which are positively charged

Answer

moles = 5.81 mol

Explanation

Given:

Volume = 144 L

AT SATP

1 mole = 24.4651 L

Solution:

1 mole = 24.4651 L

x mole = 144 L

x = 144/24.4651

x = 5.8 mol

Thermoluminescence can date sediments and rocks directly

Radiocarbon dating, also known as carbon-14 dating, is a technique used to estimate the age of carbon-containing materials that have been preserved in the last 50,000 years. It is widely used in geology, archaeology, and paleontology.The theory behind carbon dating is straightforward: living organisms absorb carbon from their environment and use it to create new organic compounds. Carbon-14 is a radioactive isotope of carbon that is absorbed by organisms at the same rate as ordinary carbon. Carbon-14 decays at a constant rate, and measuring the amount of carbon-14 in a sample can provide an estimate of how long it has been since the organism died or the carbon-containing material was formed.

Thermoluminescence (TL) dating, on the other hand, is a technique used to date sediments and rocks directly. It is based on the fact that when rocks are heated, they emit light energy. This light energy is trapped within the crystal structure of the rock, and over time, it accumulates. By measuring the amount of light energy trapped within a sample, scientists can estimate how long it has been since the sample was last heated.

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The statement about elemental nickel used in the hydrogenation of polyunsaturated oils is also incorrect as it refers to a heterogeneous catalyst, not a homogeneous one.

They are always present in the same phase as the reactants.

They typically interact with reactants to form intermediates, which eventually react away to regenerate the catalyst.

The following statements are correct:

Homogeneous catalysts are always present in the same phase as the reactants.

They typically interact with reactants to form intermediates, which eventually react away to regenerate the catalyst.

The following statement is incorrect:

They function by furnishing an active surface upon which reactions can occur. (This is true for heterogeneous catalysts, not homogeneous catalysts.)

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Explanation:

Distinguish chemical substances from mixtures

Key Points

Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components.

A chemical substance is composed of one type of atom or molecule.

A mixture is composed of different types of atoms or molecules that are not chemically bonded.

A heterogeneous mixture is a mixture of two or more chemical substances where the various components can be visually distinguished.

A homogeneous mixture is a type of mixture in which the composition is uniform and every part of the solution has the same properties.

Various separation techniques exist in order to separate matter, including include distillation, filtration, evaporation and chromatography. Matter can be in the same phase or in two different phases for this separation to take place.

Terms

substanceA form of matter that has constant chemical composition and characteristic properties. It is composed of one type of atom or molecule.

elementA chemical substance that is made up of a particular kind of atom and cannot be broken down or transformed by a chemical reaction.

mixtureSomething that consists of diverse, non-bonded elements or molecules.

Answer:

a pure substance made up of only one kind

Explanation:

From the problem, we know that:

The half-life of the nuclide is 30 years.

The time that we're going to study are 120 years.

The first thing we need to do is to find the number of half-lives that has elapsed (n). To do this, we divide the time studied by the half life:

How to determine the original mass?

We know that the amount remaining (N) is = 4.1g and the number of half-lives (n) = 4. To find the original amount (No), what we do is to use the following equation:

The original mass of Cs-131 sample was 65.6 grams.

Answer:

Metals have a property by which they can be beaten into thin sheets. This is called malleability.

Explanation:

one example is silver metal beaten to make silver foil used for decorating. On being struck hard, the metals produce a ringing sound. Due to the Metals that are used for various purposes, from making wires and sheets.

The calcium ion has 18 protons, 20 neutrons, and 20 electrons.
The relationship between the components a and b is Inverse proportion.


The calcium ion (Ca2+) has a 2+ charge, indicating that it has lost 2 electrons from its neutral state. To determine the number of protons, neutrons, and electrons in the calcium ion, we need to consider its atomic number and mass.

The atomic number of calcium is 20, which indicates that it has 20 protons. Since the calcium ion has a 2+ charge, it means it has lost 2 electrons. Therefore, the number of electrons in the calcium ion is 20 - 2 = 18.

The mass number of calcium is 40 amu, which represents the total number of protons and neutrons. Since the calcium ion has 20 protons, the number of neutrons can be calculated as 40 - 20 = 20.

So, the correct option is: d. 18 protons, 20 neutrons, and 20 electrons

In the expression a∼1/b, the relationship between the components a and b is an inverse proportion. This means that as the value of a increases, the value of b decreases, and vice versa. The symbol ∼ represents the proportional relationship between a and 1/b, indicating that they are inversely related. Therefore, the correct answer is: Inverse proportion

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The pH of the buffer solution prepared by mixing 48.2 mL of 0.183 M NaOH with 135.0 mL of 0.231 M acetic acid is approximately 4.74, calculated using the Henderson-Hasselbalch equation.

The pH of the buffer solution can be calculated using the Henderson-Hasselbalch equation, which relates the pH of a buffer solution to the pKa of the acid and the ratio of its conjugate base to acid concentration.

In this case, acetic acid (CH3COOH) is a weak acid, and sodium hydroxide (NaOH) is a strong base that will react with the weak acid to form a buffer solution.

The pKa value for acetic acid is 4.75. Using the Henderson-Hasselbalch equation:

pH = pKa + log([A-]/[HA])

where [A-] is the concentration of the conjugate base (acetate ion) and [HA] is the concentration of the weak acid (acetic acid).

First, we need to calculate the concentrations of acetate ion and acetic acid in the solution. Since the volumes of the solutions are given, we can use the concentration and volume relationship to find the moles of each component:

moles of NaOH = 0.183 M * 48.2 mL = 8.8166 mmol

moles of acetic acid = 0.231 M * 135.0 mL = 31.185 mmol

Next, we convert the moles to concentrations by dividing the moles by the total volume of the buffer solution:

[A-] = 8.8166 mmol / (48.2 mL + 135.0 mL) = 0.0476 M

[HA] = 31.185 mmol / (48.2 mL + 135.0 mL) = 0.1687 M

Now, we can substitute these values into the Henderson-Hasselbalch equation:

pH = 4.75 + log(0.0476 M / 0.1687 M) ≈ 4.74

Therefore, the pH of the buffer solution is approximately 4.74. Hence, the pH of the buffer solution prepared by mixing 48.2 mL of 0.183 M NaOH with 135.0 mL of 0.231 M acetic acid is approximately 4.74.

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Answer:

I DONT KNOW SORRY

Explanation:

Answer:

Iodine-131 is more likely to undergo beta decay than positron decay.

Suppose we take a reaction to find the limiting reaction.

2Ag + Cl2  2AgCl

The limiting reactant in the given reaction is Cl2, and the grams of product obtained will depend on the stoichiometry of the reaction.

In order to determine the limiting reactant and the grams of product obtained, we need to compare the amount of each reactant present initially with their stoichiometric ratios in the balanced chemical equation. The balanced equation for the reaction is:

2Ag + Cl2 → 2AgCl

From the equation, we can see that 1 mole of Cl2 reacts with 2 moles of Ag to form 2 moles of AgCl. To determine the limiting reactant, we need to convert the given masses of both reactants (Ag and Cl2) into moles.

Given that 25 g of each reactant is present initially, we can calculate the number of moles for each reactant using their respective molar masses. The molar mass of Ag is 107.87 g/mol, and the molar mass of Cl2 is 70.91 g/mol.

For Ag:

Number of moles = mass / molar mass

Number of moles = 25 g / 107.87 g/mol ≈ 0.232 mol

For Cl2:

Number of moles = mass / molar mass

Number of moles = 25 g / 70.91 g/mol ≈ 0.352 mol

Now, we compare the mole ratios of Ag and Cl2 in the reaction. Since the balanced equation shows that 2 moles of Ag react with 1 mole of Cl2, we can determine that Cl2 is the limiting reactant because it has fewer moles available (0.352 mol) compared to Ag (0.232 mol).

To calculate the grams of product obtained, we need to use the limiting reactant. Since 1 mole of Cl2 reacts to form 2 moles of AgCl, we can calculate the theoretical yield of AgCl using the number of moles of Cl2.

Theoretical yield of AgCl = (0.352 mol Cl2) x (2 mol AgCl / 1 mol Cl2) x (143.32 g/mol AgCl)

Theoretical yield of AgCl ≈ 100.96 g

Therefore, the limiting reactant is Cl2, and the grams of product obtained (theoretical yield) is approximately 100.96 grams.

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Agar is a complex polysaccharide derived from a seaweed.

Agar is a jelly-like substance that is used to culture bacteria and other microbes in the laboratory. It is a non-nutrient material that is used to provide a surface for the bacteria to grow on.

Agar is also used as a gelling agent in foods such as jams and jellies, as well as in the preparation of solid media for microbiological applications.

The structure of agar is composed of repeating units of galactose and 3,6-anhydrogalactose, linked together by glycosidic bonds.

It is a linear polymer of approximately 150 kDa.

Agar is a hydrophilic molecule, meaning that it attracts water molecules, which contributes to its ability to form gels.

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Answer:

A

Explanation:

hope this helps you have a good day

Answer:

I think B but I'm not sure.

Answer:

C.

Explanation:

Based on the molarity of the solutions;

pH is the negative logarithm to base ten of the hydrogen ions concentration of a solution.

pOH is the negative logarithm to base ten of the hydroxide ions concentration.

Also;

For HCl:

pH = -log [H3O+]

pH =-log (0.200)

pH = 0.699

Then;

poH= 14-0.699

pOH = 13.301

For NaOH:

pOH= -log [OH-]

= -log (0.0143)

pOH = 1.845

Then;

pH= 14-poH

= 14- 1.845

pH = 12.16

For HNO3:

pH= -log[H3O+]

=-log(3.0)

= -0.4771

Then;

pOH = 14-9-0.4771

pOH = 14.4771

For [Ca(OH)2]

molarity = 0.0031M

2 moles of OH- are produced

[OH-]= 2 × 0.0031

[OH-] = 0.0062M

pOH = - log[OH-]

=-log(0.0062)

=-log(6.2x10-3)

=-(-2.21)

pOH = 2.21

Then;

pH =14-2.21

pH =11.79

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Answer:

Valence electrons are the outermost electrons of an atom and are normally the only electrons that participate in chemical bonding. Atoms with full valence electron shells are extremely stable and therefore do not tend to form chemical bonds and have little tendency to gain or lose electrons.

Answer:

A. 0.1 km

Explanation:

0.1 km is equal to 10,000 centimeters.

hope this helps!

The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.

The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):

E = V * Q

Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):

Q = E / V

Substituting the given values, we have:

Q = 64 MJ / 330 V

To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:

Q = (64 * 10^6 J) / 330 V

Calculating the division:

Q ≈ 193,939.39 Coulombs

Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.

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