The term for a reaction where two solutions are mixed and an insoluble substance forms is called a _____ reaction.
chemical
soluble
precipitation
stoichiometry
balanced

Answer:

The chemical compound Mg(NO3)2, also known as magnesium nitrate, is very soluble, especially in water.

Answer:

Water is polar. ...

Water is an excellent solvent. ...

Water has high heat capacity. ...

Water has high heat of vaporization. ...

Water has cohesive and adhesive properties. ...

Explanation:

1. The two types of changes that came to my head first was that the states didt want to come together and also teh civial war that changed the states.

2. This goes along with the states becoming together. After the civial warnthe whole north side wanted teh south to change this included things like slavery.

3. The 26th, 19th, and 15th. They were placed due to the fact that it made it easier to elect a new president.

Answer: A. An element with the valence electron configuration 5s1 would form a monatomic ion with a charge of  Answer: +1. In order to form this ion, the element will Answer:  lose electron(s) from/into the 5s subshell(s).

Explanation:

Answer:

4

Explanation:

Answer:

hydrochloric acid

Explanation:

chemical compound any substance composed of identical molecules consisting of atoms

A pH versus rate curve with an inflection point at pH≈ 4 suggests the involvement of an acidic amino acid in the catalytic step.

Amino acids can be described as organic compounds that consist of both amino and carboxylic acid functional groups. The most important amino acids are alpha-amino acids, which comprise proteins.

Amino acids are classified according to the locations of the functional groups, such as alpha- (α-), beta- (β-), gamma- (γ-), or delta- (δ-) amino acids. In the form of proteins, amino acids form the second-largest component of human muscles and other tissues.

In the structure of amino acids, R represents a side chain attached to each amino acid. The carbon atom attached to the carboxyl group is known as the α–carbon. Amino acids with an amino group (-NH₂) bonded directly to the α-carbon are known as α-amino acids.

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Answer: ok lets battle XD

Explanation:

Answer:

hmmmmm

Explanation:

seems kinda sus

Answer:

29.5 days

Explanation:

orginally 27.3 days but 29.5 days is also correct

Answer:

144 g of phosphorus contain 4.65 moles.

Explanation:

Given data:

Mass of phosphorus = 144 g

Number of moles = ?

Solution:

Formula:

Number of moles = mass/ molar mass

Molar mass of phosphorus is 31 g/mol

Now we will put the values in formula.

Number of moles = 144 g/ 31 g/mol

Number of moles = 4.65 mol

Thus, 144 g of phosphorus contain 4.65 moles.

Answer:

6.97 atm is the osmotic pressure.

The percent composition of sodium chloride can be calculated using the formula: Percent composition x 100%. In this case, the percent composition of chloride in sodium chloride is 66.60%, as given in the problem.

Percent composition of an element in a compound can be determined experimentally by performing a decomposition reaction and measuring the masses of the elements produced.

By using the law of conservation of mass, the mass of the original compound can be determined, and the percent composition of the element can be calculated.

Percent composition is an important concept in chemistry as it provides information about the relative abundance of elements in a compound. It can be used to calculate the empirical formula of a compound, which is the simplest whole number ratio of the atoms present.

The percent composition can also be used to predict the properties and behavior of a compound, such as its solubility and reactivity.

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Answer:

A: The bonds of a Molecule

Explanation:

The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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Answer:

A. 30

Explanation:

Retinol is the chemical form of Vitamin A. It has a chemical formula of C20H30O.

It is processed when retinyl palmitate is broken down in the small intestine. Retinol helps in the proper regulation of eye cells hence a vital component in ensuring good eye sight.

It also helps in the neutralization of free radicals in the body and acts as an antioxidant which prevents cells of the body from ageing.

The atomic number represent the number of protons in an atom

We know already from particulate nature of atom that an atom is made up three sub-particles. These are:

Each atom has atomic number and mass number.

The atomic number of an atom is simply defined as the number of protons in an atom.

The mass number is the sum of the proton and neutron number.

From the above information, we can see that the atomic number is the number of protons,

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Answer:

Natural frequency

Explanation:

Natural frequency is defined as the requency at which a system performs oscillation without any driving force.

All the objects produces sounds when they vibrates. Natural frequency occurs when an object is allowed to vibrate through the molecular wavelength ofanother body and the vibration produces sound wave.

Hence, the correct answer is natural frequency.

Answer:

Interference.

Explanation:

Interference occurs when a body’s molecular wavelength sends vibrations to another body, resulting in the production of another sound wave

Hope this is correct. Have a great day.

Even if the recipe calls for an acidic ingredient, you can still use baking powder. This is something I frequently do when I add buttermilk or sour cream to cake batter.

The ideal answer is C.

For instance, baking ammonia is particularly effective as a leavening ingredient for low-moisture products with wide surface surfaces and high baking temperatures (less than 3% moisture in the baked product). Crackers, biscotti, and tiny, dry cookies are examples of effective applications.

The strongest form of flour, white bread flour has a high protein content (12–14%) and offers a lot of structure.

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Answer:

The ecosystem all the communities of living organisms found in a specific place, their habitats and their interactions in which we live provides natural services for humans and all other species that are essential to our health, quality of life and survival.

Explanation:

Answer:

\( \huge{ \boxed{111.30 \: \: \text{moles}}}\)

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\( \bold{n = \frac{N}{L} \\ }\)

where

n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities.

From the question.

N = 6.7 × 10²⁵ \( \: H_2SO_4 \: \) molecules

\(n = \frac{6.7 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 111.2956...\)

We have the final answer as.

The equations represent an acid-base reaction is Ca ( OH )₂ + 2HBr ⇒ CaBr₂ + 2H₂O . Therefore, option D is correct.

The acid-base reaction (neutralization reaction) A salt and water are created when an acid and a base interact and neutralize one another. neutralization. a reaction between an acid and a base that results in a solution that isn't as basic or acidic as the initial solutions.

Salts and water are always present in most acid-base interactions. For instance, sodium hydroxide (NaOH) and hydrochloric acid (HCl) react to produce sodium chloride (NaCl) salt and water (H2O).

A neutralizing reaction occurs when an acid and a base interact. This reaction yields a salt and water as byproducts.

Thus, option D is correct.

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The correct statement is Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons.

In a simple way to explain, Isotopes are species that have the same atomic number and mass number.

In this case, we can say that the correct statement is proton number of isotopes of an element is same.

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Answer: 55.5 oC is 0.014 atm (3rd decimal point)

Explanation:

The Clausius-Clapeyron equation is given as:

ln(P2/P1) = -(ΔH_vap/R) * (1/T2 - 1/T1)

where:

P1 = vapor pressure at temperature T1

P2 = vapor pressure at temperature T2

ΔH_vap = enthalpy of vaporization

R = gas constant = 8.314 J/(mol*K)

Converting the enthalpy of vaporization to J/mol:

ΔH_vap = 35.2 kJ/mol = 35,200 J/mol

Converting temperatures to Kelvin:

T1 = 64.7 + 273.15 = 337.85 K

T2 = 55.5 + 273.15 = 328.65 K

Substituting the values into the equation and solving for P2:

ln(P2/1 atm) = -(35,200 J/mol / 8.314 J/(mol*K)) * (1/328.65 K - 1/337.85 K)

ln(P2/1 atm) = -4.231

P2/1 atm = e^(-4.231)

P2 = 0.014 atm

Therefore, the vapor pressure for methanol at 55.5 oC is 0.014 atm, to the third decimal point.

Answer:  In two molecules of carbon dioxide (2CO2), there are _____.

two atoms of carbon

four atoms of oxygen

Answer:

10 electrons

Explanation:

Answer:

If coal and petroleum will get exhausted it will be very difficult for us to transport because most vehicles depends on petroleum, Transport on Earth will became complicated, and if coal will get exhausted we will lose an unique fossil fuel. Coal is used in various domestic and industrial purposes.

The correct answer is 76.9 g of \(Cl_{2}\) is required to react with 19.5 g of \(Al\). Therefore, the correct option is: 76.9 g.

What is Atomic Mass?

Atomic mass, also known as atomic weight or relative atomic mass, is a measure of the mass of an atom of a chemical element. It is expressed in atomic mass units (amu) or unified atomic mass units (u). Atomic mass is a weighted average mass of the naturally occurring isotopes of an element, taking into account their relative abundances.

The balanced chemical equation for the reaction is:

\(2Al\) (s) + 3\(Cl_{2}\) (g) → \(Al_{2}\)\(Cl_{6}\)

From the equation, we can see that the molar ratio between \(Al\)and Cl2 is 2:3. This means that 2 moles of \(Al\) react with 3 moles of \(Cl_{2}\)

To find out how many grams of \(Cl_{2}\) are required to react with 19.5 g of \(Al\) we need to convert the given mass of \(Al\) to moles using its molar mass, and then use the mole ratio from the balanced equation to calculate the amount of \(Cl_{2}\).

The molar mass of \(Al\) is 27 g/mol, and the molar mass of \(Cl_{2}\) is 2 * 35.45 g/mol = 70.9 g/mol.

Moles of \(Al\)= Mass of \(Al\)/ Molar mass of\(Al\)

Moles of \(Al\) = 19.5 g / 27 g/mol ≈ 0.722 mol

According to the mole ratio from the balanced equation, 2 moles of \(Al\)react with 3 moles of \(Cl_{2} .\)

Moles of \(Cl_{2}\)= Moles of \(Al\) * (3 moles of \(Cl_{2}\) / 2 moles of \(Al\))

Moles of \(Cl_{2}\) = 0.722 mol * (3/2) ≈ 1.083 mol

Now, we can convert moles of \(Cl_{2}\) to grams using its molar mass.

Mass of\(Cl_{2}\) = Moles of \(Cl_{2}\) * Molar mass of \(Cl_{2}\)

Mass of\(Cl_{2}\) = 1.083 mol * 70.9 g/mol ≈ 76.9 g

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Answer:

The answer is " 10.39"

Explanation:

Calculating acid moles:

\(= 0.02000 \ L \times 0.1000 \ M \\\\= 0.002000\)

Calculating NaOH moles:

\(= 0.02012 \ L \times 0.1000 \ M \\\\= 0.002012\)

calculating excess in OH-  Moles:

\(= 0.002012 - 0.002000\\\\=0.000012\)

calculating total volume:

\(= 20.00 + 20.12\\\\ = 40.12 mL \\\\= 0.04012 L\)

\([OH-]= \frac{0.000012} { 0.0472}\)

           \(=0.00025 M\)

\(pOH = - \log 0.00025\)

        = 3.6

\(pH = 14 - pOH\)

      = 10.39

The percent ionization of an acidic solution can be calculated from the H+ concentration. the percent ionization of the monoprotic acid of 0.141 M is 18.23 %.

Percent ionization of an acidic solution is the percent of H+ ions in the solution. Thus, mathematically, it is the ratio of H+ ion concentration to the concentration of solution multiplied by 100.

Let HA be the monoprotic acid when it ionizes, forming equal concentration of H+ and A- let it be x. Thus ionization  constant can be written as follows:

Ka = [x]² /[HA]

0.00469 =[x]²/[0.141 M]

   [X] = 0.025. = [H+]

Percentage ionization  = (0.025 M / 0.141 M)× 100

                                      = 18.23 %

Therefore percentage ionization of the acid is 18.23%.

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