An aqueous magnesium chloride solution is made by dissolving 7.12 moles of MgCI2 in sufficient water so that the final volume of the solution is 3.00 L. Calculate the molarity of the MgCI2 solution. Concentration: ___________ M

Answer:

8.1*10^-3 or 0.00809917

Explanation:

Step 1: Identify the common ion

LiF and BaF2 both share the ion F^- therefore we can interchange the molarity of LiF for F.

Step 2: Set up a balanced equation

BaF2---Ba2+   +  2F

Step 3: Set up a solubility ice table

initial- Ba^2+: 0      2F: 0.0550

change- S               2F: S^2(exponent is result of coefficient)

Step 4: Set up Ksp equation

2.45*10^-5=[S][S]^2

Step 5: Plug in values

2.45*10^-5=[S][0.0550]^2

S=8.1*10^-3

Answer:

I think the answer is A

Explanation:

the temperature of solids , liquids and gases can be easily measured

Answer:

pH = 4.40

Explanation:

Answer:

A. Draw a conclusion

Explanation:

correct me if I'm wrong :>

First, we need to know that to calculate pH or pOH we can use the following formulas:

pH = -log[H+]

pOH = -log[OH-]

And, also, pH + pOH = 14

So if we know the pOH of a solution, easily we can know the pH of it.

To solve this question we will:

Step 1 - Calculate the pOH using pOH = -log[OH-]

Step 2 - calculate the pH using pH + pOH = 14

Step 1:

pOH = - log 2.6 x 10^-7

pOH = - log 2.6 + 7

pOH = 6.59

Step 2:

pH + pOH = 14

pH + 6.59 = 14

pH = 14 - 6.59

pH = 7.41

Answer: The pH of this solution is 7.41.

By comparing the Lewis structures and molecular geometries, the true statement regarding the comparison of NF to BF3 : B is the correct option.

B. Both BF3 and NF3 are covalent compounds. BF3 is non polar while NF3 is polar.

What is polar and non polar?

When things are different at each end, we call them polar. Some molecules have positive and negative ends too, and when they do, we call them polar. If they don't, we call them non-polar. Things that are polar can attract and repel each other.

Polar molecules occur when two atoms do not share electrons equally in a covalent bond. A dipole forms, with part of the molecule carrying a slight positive charge and the other part carrying a slight negative charge. This happens when there is a difference between the electronegativity values of each atom.

Non polar molecules are symmetric with no unshared electrons. Polar molecules are asymmetric, either containing lone pairs of electrons on a central atom or having atoms with different .

To learn more about polar and non polar visit:

https://brainly.com/question/3184550

#SPJ4

Answer:

C

Explanation:

Nuclear energy produces radioactive waste. One example, the atomic bomb dropped on Hiroshima and Nagasaki during World War 2 killed many Japanese because of the radioactive waste in the air that caused them to get cancer and pass away as a result.

Answer: The molar mass is the mass of a given chemical element or chemical compound (g) divided by the amount of substance (mol).

Explanation: The molar mass of a compound can be calculated by adding the standard atomic masses (in g/mol) of the constituent atoms.

If 2.54 g of PbS is burned with 1.88 g of O2, approximately 2.20 grams of Pb will be produced.

The balanced equation for the reaction of lead sulfide (PbS) with oxygen (O2) to produce lead (Pb) and sulfur dioxide (SO2) is as follows:

2PbS + 3O2 -> 2Pb + 2SO2

From the balanced equation, we can see that the stoichiometric ratio between PbS and Pb is 2:2 or 1:1. This means that for every 1 mole of PbS, 1 mole of Pb is produced.

To calculate the number of moles of PbS, we need to divide the given mass (2.54 g) by its molar mass:

Molar mass of PbS = 207.2 g/mol (Pb) + 32.07 g/mol (S) = 239.27 g/mol

Moles of PbS = 2.54 g / 239.27 g/mol = 0.0106 mol

Since the stoichiometric ratio between PbS and Pb is 1:1, the number of moles of Pb produced is also 0.0106 mol.

To calculate the mass of Pb, we multiply the number of moles by its molar mass:

Molar mass of Pb = 207.2 g/mol

Mass of Pb = 0.0106 mol x 207.2 g/mol = 2.20 g

This calculation is based on the stoichiometric ratio between PbS and Pb, where 1 mole of PbS produces 1 mole of Pb. By converting the given mass of PbS to moles and then multiplying by the molar mass of Pb, we can determine the mass of Pb produced.

For more such question on PbS. visit :

https://brainly.com/question/27964828

#SPJ8

Answer:

The temperature of the physics book increases as the chemistry book slides across it.

Explanation:

from plato

The temperature of the physics book increasing as the chemistry book slides across it is the difference when motion is faster.

This is defined as the degree of hotness  or coldness of a body and it increases when there is more friction.

When motion is faster , there is an increase in friction and increase in thermal(heat) energy which leads to increase in temperature.

Read more about Temperature here https://brainly.com/question/2331658

#SPJ2

The partial charges on each fluorine atom are negative. Option B) The central O atom is the correct answer. Option B

The partial charges in a molecule are determined by the electronegativity values of the atoms involved. Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. In the case of \(F_2O\), fluorine (F) is more electronegative than oxygen.

Fluorine is the most electronegative element on the periodic table, meaning it has a high ability to attract electrons. Oxygen is also relatively electronegative but less so than fluorine. When fluorine atoms bond with oxygen, the shared electrons will be pulled more towards the fluorine atoms, creating a polar covalent bond.

In \(F_2O\), each fluorine atom will pull the shared electrons towards itself, resulting in a higher electron density around the fluorine atoms. This creates a region of partial negative charge around the fluorine atoms.

Conversely, the oxygen atom will have a region of lower electron density and, therefore, a partial positive charge. This is because the shared electrons spend more time around the fluorine atoms due to their higher electronegativity.

Option B

For more such question on partial charges visit:

https://brainly.com/question/29974793

#SPJ8

Answer:

HC₂H₃O₂ + 2O₂ —> 2CO₂ + 2H₂O

The coefficients are: 1, 2, 2, 2

Explanation:

From the question given above, the following data were obtained:

HC₂H₃O₂ + O₂ —> CO₂ + H₂O

We can balance the above equation as follow:

HC₂H₃O₂ + O₂ —> CO₂ + H₂O

There are 4 atoms of H on the left side and 2 atoms on the right side. It can be balance by writing 2 before H₂O as shown below:

HC₂H₃O₂ + O₂ —> CO₂ + 2H₂O

There are 2 atoms of C on the left side and 1 atom on the right side. It can be balance by writing 2 before CO₂ as shown below:

HC₂H₃O₂ + O₂ —> 2CO₂ + 2H₂O

There are 4 atoms of O on the left side and a total of 6 atoms on the right side. It can be balance by writing 2 before O₂ as shown below:

HC₂H₃O₂ + 2O₂ —> 2CO₂ + 2H₂O

Now the equation is balanced.

The coefficients are: 1, 2, 2, 2

Esterification is a chemical reaction between an alcohol and a carboxylic acid that results in the formation of an ester and a molecule of water.

Esterification  is an important class of organic reactions and is widely used in the synthesis of flavors, fragrances, and plastics. In this report, we will explore the fundamental principles and practical applications of esterification.

The experimental procedure involves the reaction between methanol and acetic acid to form methyl acetate and water. The reaction was carried out in a round-bottom flask equipped with a condenser and a thermometer. The reactants were mixed in stoichiometric amounts, and a small amount of sulfuric acid was added as a catalyst. The flask was heated using a hot plate and maintained at a constant temperature of 60°C.

Learn more about esterification:https://brainly.com/question/16010744

#SPJ1

Answer:

Having a specific set of possible values

Answer:

Nacl compound contain ionic bonds because sodium is metal and chlorin is nonmetal

Answer:

Osmosis is the movement of solvent particles across a semipermeable membrane from a dilute solution into a concentrated solution. ... Diffusion: Diffusion is the movement of particles from an area of higher concentration to lower concentration. The overall effect is to equalize concentration throughout the medium.

Osmosis is a special case of diffusion. Water, like other substances, moves from an area of higher concentration to one of lower concentration. ... In this example, the solute cannot diffuse through the membrane, but the water can. Water has a concentration gradient in this system.

3.73 × 10⁻¹²J/mol is the energy of a single UV photon and 1 mole of UV photons having a wavelength of 32 nm.

A photon is a microscopic particle made up of electromagnetic radiation waves. Maxwell demonstrated that photons are merely electric fields moving through space. Photons move at the speed of light and have no charge or rest mass.

According to Planck's Law, electromagnetic radiation from heated bodies is not released in a continuous stream but rather as discrete energy units called quanta, the size of which depends on a fundamental physical constant.

E .. hc/λ

λ is 32nm

h is 6.626*10⁻³⁴Js

c is 3 × 10⁸m/s

E of single photon will be (6.626*10-34 * 3*10⁸)/32*10⁹

i.e. 0.62*10⁻³⁵J

1 mol UV photons = 6.022 × 10^23 UV photons.

E of 1 mole = E of single photon *6.022 × 10²³

                   = 0.62*10⁻³⁵ * 6.022 × 10²³

                  = 3.73*10⁻¹²J/mol

To learn more about photon use link below:

https://brainly.com/question/15946945

#SPJ1

First we need the molar mass of NaNO_3:-

\(\\ \sf\longmapsto 23+14+3(16)\)

\(\\ \sf\longmapsto 37+48\)

\(\\ \sf\longmapsto 85g/mol\)

Now we need moles of NaNO_3

\(\\ \sf\longmapsto No\:of\:moles=\dfrac{Given\:mass}{Molar\:mass}\)

\(\\ \sf\longmapsto No\:of\:moles=\dfrac{65}{85}\)

\(\\ \sf\longmapsto No\:of\:moles=0.765mol\)

Now

\(\\ \sf\longmapsto Molarity=\dfrac{Moles\:of\:solute}{Vol\:of\:soln.\:in\:L}\)

\(\\ \sf\longmapsto Molarity=\dfrac{0.765}{0.350}\)

\(\\ \sf\longmapsto Molarity=2.2M\)

The condensed structure that corresponds to the the lewis structure has a main backbone is 2,2 dichloro butane.

A Lewis structure, also known as a Lewis point formula, Lewis point structure, electron point structure, or Lewis electron point structure, is a diagram showing the bonds between the atoms of a molecule and the lone pairs of electrons present in the molecule.

The Lewis structure is a very simplified representation of the valence shell electrons in a molecule. Used to describe how electrons are arranged around individual atoms in a molecule. Electrons are represented as "dots" or as lines between two atoms to join electrons.

The Lewis structure is based on the concept of the octet rule in which atoms share electrons, so each atom has eight electrons in its outer shell. For example, the oxygen atom has six electrons in its outer shell.

Learn more about Lewis stricture here:-https://brainly.com/question/20300458

#SPJ4

The question requires us to identify the molecular formula of a molecule formed between phosphorus (P) and chlorine (Cl).

The first step to solve this question is write the electronic configuration of both atoms involved (P and Cl) and, from the number of valence electrons, identify how many bonds each one should make.

P has atomic number 15, thus its electronic configuration is: 1s2 2s2 2p6 3s2 3p3

Cl has atomic number 17, thus its electronic configuration is: 1s2 2s2 2p6 3s2 3p5

Note that P has 5 valence electrons (3s2 and 3p3) while Cl has 7 valence electrons (3s2 3p5).

For P, we should expect 3 bonds to other atoms in order to reach the octet, while for Cl, we should expect 1 bond to another atom to achieve the octet.

With that in mind, we can say that each Cl will bond to one P, and we need 3 Cl. Therefore, the molecular formular is PCl3 (the last option).I

A thermochemical equation can be written by expressing the heat evolved or absorbed in terms of the enthalpy change ΔH. Here ΔH for the following reaction +88.2 kJ. The correct option is A.

A chemical equation which indicates the heat change occuring during the reaction is defined as the thermochemical equation. In thermochemical equations, physical states of the reactants and products should be specified.

Here the given reaction 4 AlCl₃ (s) + 3 O₂ (g) ⇒ 2 Al₂O₃ (s) + 6 Cl₂ (g) is reversed as 1 /3 Al₂O₃ (s) + Cl₂ (g) ⇒ 2/3 AlCl₃ (s) + 1/2 O₂ (g) and multiplied by 1/6.

So the new enthalpy is +88.16 ≈ 88.2 kJ

Thus the correct option is A.

To know more about thermochemical equation, visit;

https://brainly.com/question/2874342

#SPJ1

Answer:

the reactor was overheating

Answer:

Tcs foods are foods that pose a greater risk of causing foodborne illness if not prepared.

Non Tcs foods on the other hand, are foods that are less likely to support the growth of bacteria and have a lower risk of causing foodborne illness.

The solubility of\(LaF_3\) in water is 3.04 x 10^-6 mol/L.

The solubility of \(LaF_3\) in water can be determined using the Ksp expression:

\(Ksp = [La^{3+}][F^-]^3\)

Where \([La^{3+}]\)and \([F^-]\) are the molar concentrations of the \(La^{3+}\) and \(F^-\) ions in the solution.

Since each \(LaF_3\) formula unit dissociates into one \(La^{3+}\) ion and three \(F^-\) ions, the molar solubility of \(LaF_3\) can be represented as x. Thus, the molar concentrations of \(La^{3+}\) and \(F^-\) ions in the solution can be written as x and 3x, respectively.

Substituting these values into the Ksp expression gives:

Ksp = x*(3x)^3 = 27x^4

Now, we can solve for x:

x = (Ksp/27)^(1/4)

= (2 x 10^-19 / 27)^(1/4)

= 3.04 x 10^-6 mol/L

For more question on solubility click on

https://brainly.com/question/24057916

#SPJ11

Answer:

Below

Explanation:

Density = mass / volume      the volume = the amountof water displaced

Density = 96 g /4 cc = 24 g/cc     ( cc and ml are the same )

Answer:

0.46 mole

Explanation:

Ag is silver in which 1 mole equals 107.87 g

so 50.00 mg of Ag will have 50.00/107.87 = 0.46 mole

Answer: c potassium.

Explanation:

potassium is the most reactive metal among the given options.

D is absolutely wrong.