1. write the balanced net ionic equation for the reaction

ca2+(aq) + oh-(aq) + h+ + po3-(aq) —> ca2+(aq) + po3-(aq) + h2o(l)

the molality of solutes in the aqueous solution is 0.182 molal.

⇒m = (molality) = (Δ\(T_f\)) / (\(K_f\) × w2)

We have to calculate the molality of solutes in the solution by using the freezing-point depression constant and freezing-point depression of the aqueous solution.

Now, Substituting the given values, we get,

⇒ m = (Δ\(T_f\)) / (\(K_f\) × w2)

⇒ m = 0.34 / (1.86 × w2)

⇒ m = 0.182 molal

Therefore, the molality of solutes in the solution is 0.182 molal.

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The equilibrium constant of the reaction is represented by the symbol K. Thus, option C is the correct and accurate statement about the equilibrium constant.

The equilibrium constant is a representation of the concentration of the products and the reactants of the reaction that is raised to the powers through their stoichiometry coefficient.

Its value varies and changes at different temperatures and is not always less than 1. The equilibrium constant is the ratio of the coefficient of the products to reactants.

Therefore, option C. equilibrium constant is represented by K is true.

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The scientific question related to the game of basketball is option D: "Do teams that practice more win more games?"

This question is scientific because it explores a cause-and-effect relationship between practice and game outcomes. It can be investigated through empirical observation and data analysis.

To answer this question, researchers could collect data on the practice hours of different basketball teams and compare them to their corresponding game performance. Statistical analysis could be used to determine if there is a correlation between practice time and winning percentage or other performance metrics.

By examining a large sample of teams over an extended period, researchers could draw conclusions about the impact of practice on game outcomes. This scientific inquiry would contribute to the understanding of the factors that influence team success in basketball and could potentially inform training strategies and coaching techniques.

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The volume (in milliliters) of the 2.00 M NaOH solution that can be produced from the reaction is 955 mL

First, we shall determine the mole of 44.00 grams of Na that reacted. Details below:

Mole = mass / molar mass

Mole of Na = 44 / 22.99

Mole of Na = 1.91 moles

Next, we shall determine the mole of NaOH obtained from the reaction. Details below:

2Na + 2H₂O -> 2NaOH+ H₂

From the balanced equation above,

2 moles of Na reacted to produced 2 moles of NaOH

Therefore,

1.91 moles of Na will also react to produce 1.91 moles of NaOH

Finally, we shall determine the volume of the 2.00 M NaOH produced. Details below:

Volume = mole / molarity

Volume of NaOH = 1.91 / 2

Volume of NaOH = 0.955 L

Multiply by 1000 to express in milliliter

Volume of NaOH = 0.955 × 1000

Volume of NaOH = 955 mL

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Answer:Plasma is highest energy state of matter.It consists of electrons,protons and neutral particles.

Explanation:(1) Plasma has a very high electrical conductivity .

(2) The motion of electrons and ions in plasma produces it's own electric and magnetic field

(3)It is readily influenced by electric and magnetic fields .

(4)It produces it's on electromagnetic radiations.



There are approximately 0.328 moles of oxygen in the sample of nickel tetracarbonyl.

To determine the number of moles of oxygen in a sample of nickel tetracarbonyl when there are 0.082 moles of nickel, we need to consider the chemical formula of nickel tetracarbonyl: Ni(CO)4.

From the chemical formula, we can conclude that each molecule of nickel tetracarbonyl contains four carbon monoxide (CO) ligands. Each CO ligand consists of one carbon atom and one oxygen atom.

Since there are four CO ligands per molecule of nickel tetracarbonyl, there are also four oxygen atoms per molecule.

Given that there are 0.082 moles of nickel, it implies that there is an equal number of moles of nickel tetracarbonyl since the molar ratio between nickel and nickel tetracarbonyl is 1:1.

Therefore, if there are 0.082 moles of nickel, there are also 0.082 moles of nickel tetracarbonyl.

Since each molecule of nickel tetracarbonyl contains four oxygen atoms, the number of moles of oxygen can be calculated as follows:

Number of moles of oxygen = Number of moles of nickel tetracarbonyl × Number of oxygen atoms per molecule

Number of moles of oxygen = 0.082 moles × 4

Number of moles of oxygen = 0.328 moles

Hence, there are approximately 0.328 moles of oxygen in the sample of nickel tetracarbonyl.

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Answer:

The destiny of silicon,which is 2.33 g/cm3

Explanation:

A) The number of H₂O molecules in 0.23 moles is equal to 1.5 × 10²³.

B) The single displacement reaction is,

Ca + 2HCl →  CaCl₂ + H₂

C)  The double displacement reaction is,

Na₂SO₄ + 2NH₄Cl → 2NaCl  + (NH₄)₂SO₄

A displacement reaction is one in which a set of atoms in a molecule are replaced by another set of atoms.

When an element leaves its compound or when one element is replaced by another from its own compound, a single displacement reaction can be demonstrated as a type of redox reaction.

In aqueous solutions, double displacement reactions take place where ions precipitate and exchange ions.

Hydrogen gas and calcium chloride are produced in a single displacement reaction between calcium and HCl acid.

Ca + 2HCl →  CaCl₂ + H₂

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To find the concentration of the sulphuric acid, we can use the equation:
acid + base → salt + water

In this case, the acid is sulphuric acid (H2SO4), the base is ammonia (NH3), and the salt is ammonium sulphate (NH4)2SO4.
From the equation, we can see that one mole of acid reacts with one mole of base to form one mole of salt. Therefore, we can use the following equation to find the moles of sulphuric acid:
moles H2SO4 = moles NH3
First, we need to find the moles of NH3:
moles NH3 = concentration × volume
moles NH3 = 0.116 mol/L × 0.0328 L
moles NH3 = 0.00381 mol
Since the moles of NH3 and H2SO4 are equal, we can find the concentration of the sulphuric acid:
moles H2SO4 = 0.00381 mol
volume H2SO4 = 0.0250 L
concentration H2SO4 = moles/volume
concentration H2SO4 = 0.00381 mol/0.0250 L
concentration H2SO4 = 0.152 mol/L
Therefore, the concentration of the sulphuric acid is 0.152 mol/L.

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0.2 M each of nitric acid and carbonic acid will have the same pH.

The pH of substances is mathematically given as:

pH - -log [H+]

Nitric and carbonic acid dissociates according to the following:

HNO3 ---------> H+ + NO3-

H2CO3 -------> H+ + HCO3-

Thus, both acids ionizes to produce the same number of moles of H+, thus, producing the same pH

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Answer:

Explanation:

We can use the combined gas law.

P1V1T1 = P2V2T2

where P, V, and T are the pressures, volumes and temperatures for the initial (P1,V1,T1) and final (P2,V2,T2) states.  All temperatures must be in Kelvin (add 273,15 to C to make K).

We are given volumes amd the initial pressure.  Nothing is mentioned about temperatures.  The unknown is the fianl pressure, P2.

Reorgamize the combined gas law to solve for P2:

  P2 = P1(V1/V2)(T2/T1)

Note how the volue and temperature terms are organized.  They are ratios of the starting and ending states.  This helps keep things organized and easier to solve (unit cancellations are easier).

No information is given on temperatures, so we have to assume they remain constant.  The term (T2/T1) reduces to 1, and the units cancel.

Enter the data:

 P2 = P1(V1/V2)(T2/T1)

 P2 = (1.4 atm)(14 L/10.5 L)(1)

 P2 = 1.88 atm

Answer:

Br.

neutron = mass number - atomic number

youcan see the answer at the pic

The isotope that has 45 neutrons is B. 80,35Br.

The neutron can be obtained by subtracting the protons from the mass number. In the question, we have a proton that is numbered, 35 and a mass number of 80.

So, to get the neutron, we would subtract the protons from the mass number as follows;

80 - 35 = 45. The element that is described by this data is Bromine. Therefore, the correct option number is B. 80,35Br.

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To calculate the volume of the hydrogen atom, we can use the formula for the volume of a sphere, which is V = (4/3)πr^3, where r is the radius of the sphere.

In this case, the radius of the electron cloud is about 5.3 x 10^-11 m, so we can plug that into the formula:
Vatom = (4/3)π(5.3 x 10^-11)^3
Vatom = 1.6 x 10^-30 m^3
So, the volume of the hydrogen atom is about 1.6 x 10^-30 cubic meters. This is an incredibly small volume, but it's important to remember that atoms are incredibly tiny particles. In fact, you would need more than 100 trillion hydrogen atoms lined up side by side to span just 1 centimeter!

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Answer:Buddhism

Explanation:

chinese religion is a Buddhism

Since you will want to keep the three small vials of vaccine cold ( between 2 and 8 degree Celsius) for up to 24 hours you will need an exothermic reaction.

An exothermic reaction can be defined as the reaction in which the energy is released in the form of heat. when we kept water in the freezer , water molecules releases the heat to the surroundings and tend to freeze to ice form.

Thus, Since you will want to keep the three small vials of vaccine cold ( between 2 and 8 degree Celsius) for up to 24 hours you will need an exothermic reaction.

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Answer:

good times

Explanation:

always nedded

Here the nuclear decay of phosphorous to give S-32 is an example of beta-decay. Hence, the emitted particle is an electron. Thus, option b is correct.

The heavy unstable radioactive isotopes undergo nuclear decay by the emission of alpha or beta particle. Thus, there are mostly two types of decays, alpha decay and beta decay.

In alpha decay, the isotope emits a helium nuclei. Hence, mass number decreases by 4 units and atomic number decreases by 2 units. In beta decay, mass number does not change but atomic number increases by 1.

Here, P-32 undergo beta -decay by emitting an electron to form S -32. Hence, atomic number is increased by one. Therefore, the mission product is an electron option b.

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Answer:

answer is 12

Explanation:

because h20 is a molecule made of hydrogen and o for oxygen and there are 12of these molecules

The molecular shape of the "OsbCl2" molecule can be determined by using the VSEPR (Valence Shell Electron Pair Repulsion) theory. This theory predicts the molecular shape based on the repulsion between the electron pairs surrounding the central atom (in this case, the "sb" atom).

Based on the VSEPR theory, the molecular shape of OsbCl2 is:Square Planar In a square planar molecular geometry, the central atom is surrounded by four electron pairs (or regions of high electron density) arranged in a square shape. These electron pairs are in a plane, and the bond angles are approximately 90°.The molecular shape of OsbCl2 is Square Planar, which means the central atom (sb) is surrounded by four electron pairs arranged in a square shape and the bond angles are approximately 90°

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Answer:

a chemical bond in which two pairs of electrons are shared by two atoms and a molecule. Examples of compounds with double bonds include oxygen gas, carbon dioxide, acetone, and ozone

a chemical bond in which two pairs of electrons are shared between two atoms.

Answer:between 25 and 40 degrees Fahrenheit

Explanation:

Heat pumps do not operate as efficiently when temperatures drop to between 25 and 40 degrees Fahrenheit for most systems. A heat pump works best when the temperature is above 40. Once outdoor temperatures drop to 40 degrees, heat pumps start losing efficiency, and they consume more energy to do their jobs.

The tincture is a combination of iodine and an organic carrier that serves as a moderate-level disinfectant and antiseptic.

The iodine in the solution helps to kill bacteria and other microorganisms working as a disinfectant. A disinfectant is an agent that eliminates or lowers the risk of infection by killing or inactivating microorganisms. Disinfectants are frequently used to clean surfaces or equipment to reduce the risk of infection.

The alcohol helps to dissolve and spread the iodine evenly over the surface to be disinfected working as an antiseptic.

Antiseptic is a term that describes a substance that is applied to living tissue to reduce the risk of infection or sepsis. Antiseptics, such as hydrogen peroxide, alcohol, and iodine, are used to clean the skin before an operation or disinfect a wound after cleaning it.

Tincture of iodine is also used for minor wound care and as an emergency water purification method.

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The exercises refer to hydrocarbons. Depending on the type of bond, it will be the termination of the name of the molecule.

For a single bond: End with the suffix -ane

For double bond: Ends in -ene

For triple bond: Ends in -yne

Let's look at each particular case

a) Heptene

Hept- means 7 carbons, so we have a compound with 7 carbons and one double bond. The formula will be:

c)Hexane

6 carbons with a simple bond

d)Pentane

5 carbons with a simple bond

e)Propyne

3 carbons with a triple bond

Answer:

0.446

Explanation:

ccu =  3035.655 / 104 g x (98.9 - 33.5)  = 0.446 J / g 0 C

The experimental specific heat capacity of the copper is 0.446 J/g°C.

\Solution:

CCU =  3035.655 / 104 g x (98.9 - 33.5)

       = 0.446  J/g°C.

The method for particular heat ability, C, of a substance with mass m, is C = Q /(m ⨉ ΔT).

wherein Q is the strength added and ΔT is the exchange in temperature.

The unique heat capability is defined as the quantthe ity of heat (J) absorbed consistent with unit mass (kg) of the cloth when its temperature will increase 1 k (or 1 °C), and its units are J/(kg k) or J/(kg °C).

Particular heat is defined by the quantity of heat had to raise by the temperature of 1 gram of a substance 1 diploma CelsiuwhichC). Water has a high precise warmth, that means it takethe s more energy to boom the temperature of water as compared to different materials.

A high particular warmness of a substance means that a big quantity of warmth is required to raise the temperature of the substance. Water covers the Earth's surface and its highly unique warmth performs a completely essential position as it can soak up a whole lot of warmness without a substantial upward push inside the temperature.

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Answer:

a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.

Explanation:

Answer:

Explained below

Explanation:

Formula for Ammonia is NH3

Now, Nitrogen has 5 electrons in it's outermost shell while hydrogen has only 1 electron.

Thus means that nitrogen needs three more electrons to add to it's five to complete it's octet shell.

Whereas each hydrogen atom will need one extra electron to complete 2 electrons in it's outermost shell.

As depicted in the image attached, Each atom will now have a complete valence shell since the three

Hydrogen(H) atoms share their electrons thereby forming covalent bonds with one Nitrogen(N) atom.

Answer: it is group1 or group 3 on god

Explanation:

Answer: D

Explanation:

The set of reaction conditions would favor a sn2 reaction on 2-bromo-3-methylbutane is a strong nucleophile in an aprotic solvent. The correct option is D.

It is a type of nucleophilic substitution reaction. This mechanism is common in organic chemistry. In these reactions, one bond is break and one bond is formed simultaneously.

The sn2 is a nucleophile reaction, and it is a strong nucleophile. This type of reaction, will occur in the compounds in which there is one alkyl halide group and a good leaving group.

In 2-bromo-3-methylbutane, there is a bromine and methyl group both, so the favor would be a strong nucleophile in an aprotic solvent.

Thus, the correct option is D) strong nucleophile in an aprotic solvent.

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The question is incomplete. Your complete question is given below:

A) weak nucleophile in a protic solvent

B) weak nucleophile in an aprotic solvent

C) strong nucleophile in a protic solvent

D) strong nucleophile in an aprotic solvent

E) none of the above

Explanation:

We have a 63.9 g sample of calcium hydroxide. First we have to convert those grams into moles. To do that we have to use the molar mass of calcium hydroxide.

Calcium hydroxide = Ca(OH)₂

molar mass of Ca = 40.08 g/mol

molar mass of O = 16.00 g/mol

molar mass of H = 1.01 g/mol

molar mass of Ca(OH)₂ = 1 * 40.08 g/mol + 2 * 16.00 g/mol + 2 * 1.01 g/mol

molar mass of Ca(OH)₂ = 74.10 g/mol

mass of Ca(OH)₂ = 63.9 g

moles of Ca(OH)₂ = 63.9 g /(74.10 g/mol)

moles of Ca(OH)₂ = 0.862 moles

In 1 molecule of Ca we have 2 atoms of O. So in 1 mol of Ca(OH)₂ we will have 2 moles of O atoms.

1 mol of Ca(OH)₂ = 2 moles of O atoms

moles of O atoms = 0.862 moles of Ca(OH)₂ * 2 moles of O /1 mol of Ca(OH)₂

moles of O atoms = 1.724 moles

One mol is similar to a dozen. When we say that we need a dozen eggs we know that we need 12 eggs. If we want a mol of eggs, we want 6.022*10^23 eggs. So one mol of something is 6.022 * 10^23 of that.

1 mol of O atoms = 6.022 * 10^23 atoms

n° of O atoms = 1.724 moles * 6.022 * 10^23 atoms/1 mol

n° of O atoms = 1.04 * 10^24 atoms

Answer: In a 63.9 g sample of Ca(OH)₂ we have 1.04 *10^24 atoms of oxygen.