11.9 g Cl2 is reacted with 10.7 g NaOH. How many moles of NaCl are produced?

A) Ethanol in water: Distillation.

B) Boiling the mixture of chloride crystals with water: Evaporation.

C) Pure water from muddy water: Filtration.

D) Sodium chloride in water: Evaporation or Crystallization.

E) Sodium carbonate in water: Filtration or Evaporation.

F) Chlorophyll from leaves: Extraction using a suitable solvent like ethanol.

G) Mixture of acetic acid and alcohol: Distillation.

H) Serum from blood sample: Centrifugation.

I) Kerosene from water: Separatory funnel or Decantation.

J) Ammonium chloride in sand: Sublimation or Dissolving in water and Filtration.

A) Ethanol in water: Distillation can be used to separate ethanol from water based on their different boiling points.

B) Boiling the mixture of chloride crystals with water: By heating the mixture, the water will evaporate, leaving behind the chloride crystals.

C) Pure water from muddy water: Filtration can be used to separate the solid particles (mud) from the water.

D) Sodium chloride in water: Evaporation can be used to separate sodium chloride from water by heating the mixture until the water evaporates, leaving behind the salt.

E) Sodium carbonate in water: Filtration can be used to separate solid sodium carbonate from water, similar to muddy water.

F) Chlorophyll from leaves: Extraction using a suitable solvent like ethanol or acetone can be used to separate chlorophyll from leaves.

G) Mixture of acetic acid and alcohol: Distillation can be used to separate the mixture based on their different boiling points.

H) Serum from blood sample: Centrifugation can be used to separate the serum, which is the liquid part of blood, from the solid components like cells.

I) Kerosene from water: Separatory funnel or decantation can be used to separate the immiscible liquids by pouring off the top layer (kerosene) from the bottom layer (water).

J) Ammonium chloride in sand: Sublimation can be used to separate ammonium chloride by heating the mixture, causing the ammonium chloride to vaporize and then condense back into solid form in a cooler region, leaving the sand behind.

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The outermost of the six sun layers with the letters A, B, C, D, E, and F, layer F in the cross-sectional figure symbolises the corona.

The Sun's atmosphere's outermost region is called the corona. The brilliant brightness of the Sun's surface often obscures the corona. Without employing specialised equipment, it is challenging to see. A total solar eclipse, however, makes the corona visible.

The term "corona" refers to the topmost region of the Sun's atmosphere. It rises hundreds of kilometres above the Sun's surface and gradually changes into the solar wind, which travels across our solar system.

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ANSWER

The amount of heat released is -54, 957.175J

EXPLANATION

Given that;

To find the amount of energy released, then apply the below formula

Recall, that the specific heat capacity of steam (c) is 2.03 J/g degrees Celcius

Therefore, the amount of heat released is -54, 957.175J

Answer:

D coarse texture

Explanation:

An igneous rock floats because air bubbles became trapped when molten material erupted from an underground volcano. This rock can be accurately described as extrusive and the correct option is option 2.

Igneous rocks (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface. Igneous rocks are divided into two groups, intrusive or extrusive, depending upon where the molten rock solidifies.

Igneous rocks can be easily identified with their texture, density, colour, and mineral composition. Its texture depends on the shape, size, time period to cool down and solidify, and the arrangement of crystals in the rock.

Therefore, an igneous rock floats because air bubbles became trapped when molten material erupted from an underground volcano. This rock can be accurately described as extrusive and the correct option is option 2.

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We can see here that the best fuel is the one that produces the most heat per unit mass. In this case, the fuel that produces the most heat per unit mass is methanol.

Fuel is a substance that is used to produce energy through combustion or other chemical reactions. It is commonly utilized to power various forms of transportation, generate heat or electricity, and operate machinery and appliances.

The results of the experiment are shown below:

Fuel            Mass (g)      Heat produced (J)       Heat per gram (J/g)

Methanol 1.0                          350                   350

Ethanol         1.0                          250                   250

Propane         1.0                          200                   200

Butane         1.0                          150                            150

Pentane         1.0                          100                            100

It is important to note that the results of this experiment are only a measure of the heat produced by the fuels.

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At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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Answer:

5 Electrons.

Explanation:

Hello.

In this case, an element in group 15 such as nitrogen has 5 electrons on the outer shell because of its electron configuration. For N, whose atomic number is 7, the electron configuration is:

\(N^7: 1s^2,2s^2,2p^3\)

Whereas energy level 2 has 5 electrons (2 from 2s and 3 from 2p). Next element is phosphorous and its electrons configuration is:

\(P^{15}:1s^2,2s^2,2p^6,3s^2,3p^3\)

It also has 5 electron on the energy level 3 (2 from 3d and 3 from 3p).

Best regards!

Answer:

Fractional distillation is a method for separating liquids with different boiling points. For example, liquid ethanol can be separated from a mixture of ethanol and water by fractional distillation. ... The boiling point of ethanol is 78°C and the boiling point of water is 100°C.

Answer:

The chemical symbols for three different atomic cations that all have 5 protons are; \(B^+, B^2+, B^3+\).

A cation simply means a positive ion. Cations are formed when a neutral atoms loose one or more electron(s).

In the periodic table, there exists a single element that has five protons and that element is boron (B).

Boron can form three cations and this depends  on the number of electrons lost from the neutral boron atom in each case. These cations are; \(B^+, B^2+, B^3+\).

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Answer:

volume of a gas 24dm³ or 24,000 cm³

The rate constant of the second-order reaction is 0.111 M^-1 min^-1.

The given data represents a second-order reaction where the rate of the reaction is proportional to the square of the concentration of A.

The integrated form of the second-order reaction is:

1/[A]t = kt + 1/[A]0

where [A]t and [A]0 are the concentrations of reactant A at time t and time zero, respectively, k is the rate constant.

We can use the given information to calculate the rate constant (k) of the reaction for the given half-life (t1/2) of 3.15 minutes:

t1/2 = (1 / k[A]0)

Using the percentage decrease in concentration and the given initial concentration, we can calculate the concentration of A at time t:

[A]t = [A]0 - 0.30[A]0 = 0.57126 M

Substituting the given values, we get:

3.15 min = (1 / k)(0.0818 M) / (0.0818 M - 0.57126 M)

Simplifying the equation above, we can solve for k:

k = 0.111 M^-1 min^-1

Therefore, the rate constant of the second-order reaction is 0.111 M^-1 min^-1.

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Statement 1: False

Statement 2: True

Statement 3: True

Statement 4: False

Statement 5: False

Statement 6: True

Evidence other than the CMB provides support for the Big Bang theory is redshift proposed by Edwin Hubble.

The redshift that was suggested by Edwin Hubble is yet another piece of evidence that supports the Big Bang idea. His finding confirmed the theory that the universe is expanding as a result of the other galaxies' light's redshift.

Edwin Hubble declared in 1929 that nearly all galaxies looked to be revolving away from us. He discovered that the cosmos was actually expanding, with all of the galaxies moving apart. The spectrum of a galaxy was seen to change toward red due to this occurrence.

Edwin Hubble made two significant changes to our knowledge of the universe over the span of five years, contributing to the development of the Big Bang theory. He first showed that the universe is far bigger than previously believed before proving that it is expanding.

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This is a example of not formulating a hypothesis (using a model)


Kinetic principle of gases is a theoretical model that describes the molecular composition of the gas in phrases of a massive quantity of submicroscopic particles which encompass atoms and molecules. in addition, the principle explains that gas stress arises because of particles colliding with every different and the walls of the field.
Kinetic Molecular principle. Kinetic energy is energy that an object has because of its movement. The Kinetic Molecular theory explains the forces among molecules and the power that they possess.
The physical behaviour of gases is explained via the kinetic molecular principle of gases. The quantity of collisions that gas particles make with the walls in their field and the pressure at which they collide determine the magnitude of the fuel strain. Temperature is proportional to common kinetic energy.

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Answer

65cm^3

Explanation

1mL=1cm^3

so; 65.0mL=65cm^3

1) Write the chemical equation.

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 1

Cl: 1

List the elements (or polyatomic ions) in the reactants.

K: 1

P: 1

O: 4

H: 3

Cl: 1

2) Balance K.

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 1

Cl: 1

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 3

Cl: 3

3) Balance Cl.

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 3

Cl: 3

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 3

Cl: 3

4) The balanced chemical equation.

.

The molarity of the NiSO₄ solution made by dissolving 38.81 grams of nickel (ii) sulfate, NiSO₄, in enough water to make 0.467 liters of solution is 0.535 M

First, we shall obtain the mole of 38.81 grams of nickel (ii) sulfate, NiSO₄. Details below:

Mole of NiSO₄ = mass / molar mass

= 38.81 / 154.75

= 0.25 mole

Now, we shall determine the molarity of the solution. Details below:

Molarity of solution = mole / volume

= 0.25 / 0.467

= 0.535 M

Thus, the molarity of the solution is 0.535 M

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The balanced reaction equations are;

Na3PO4 + 3HCl → 3NaCl + H3PO4

2Al + 6HCl ----> 2AlCl3 + 3H2

2 FeC2O4 + 2 CO2---> Fe2(C2O4)3

TiCl4 + H2O → Ti(OH)4 + 4HCl

B2Br6 + 6HNO3 → 2B(NO3)3 + 6HBr

A chemical reaction equation must have an equal number of atoms for each element on both sides in order to be balanced.

Determine the total number of atoms in the reactants and products for each element. To balance the equation, pick a coefficient. This would be placed at the beginning of the chemical formula.

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Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question we have

mass = 14.5 × 5

We have the final answer as

Hope this helps you

The mass (in grams) of fluorine the sample have is 2.91 g

First, we shall determine the mole of 9 grams of cobalt. Details below:

Mole = mass / molar mass

Mole of cobalt = 9 / 58.93

Mole of cobalt = 0.153 mole

Finally, we shall determine the mass of fluorine the present in the compound. Details below:

Mole = mass / molar mass

0.153 = Mass of fluorine / 19

Cross multiply

Mass of fluorine = 0.153 × 19

Mass of fluorine = 2.91 g

Thus, the mass of fluorine is 2.91 g

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Answer:

Because sugar has no ions in the solution

Explanation:

Pure water contains very few ions, so it does not conduct electricity very well. When table salt is dissolved in water, the solution conducts very well, because the solution contains ions. When sugar is dissolved in water, the solution does not conduct electricity, because there are no ions in the solution.

In basic words the more ions in the solution there is a better chance to conduct electricity.

To calculate the molarity of a solution, we need to determine the number of moles of the solute (Bal2) and then divide it by the volume of the solution in liters.

Given:

Mass of Bal2 = 413 g

Volume of solution = 750 ml = 0.75 L

1. Calculate the number of moles of Bal2:

First, we need to convert the mass of Bal2 to moles using its molar mass. The molar mass of Bal2 can be calculated by summing the atomic masses of boron (B) and iodine (I):

Molar mass of Bal2 = (atomic mass of B × 1) + (atomic mass of I × 2)

Molar mass of Bal2 = (10.81 g/mol × 1) + (126.90 g/mol × 2)

Molar mass of Bal2 = 10.81 g/mol + 253.80 g/mol

Molar mass of Bal2 = 264.61 g/mol

Now we can calculate the number of moles of Bal2:

Moles of Bal2 = Mass of Bal2 / Molar mass of Bal2

Moles of Bal2 = 413 g / 264.61 g/mol

Moles of Bal2 ≈ 1.561 mol

2. Calculate the molarity of the solution:

Molarity (M) = Moles of solute / Volume of solution (in liters)

Molarity (M) = 1.561 mol / 0.75 L

Molarity (M) ≈ 2.081 M

Therefore, the molarity of the solution is approximately 2.081 M.

The molarity of the solution is approximately 1.408 M as to calculate the molarity of a solution, one must need to know the number of moles of the solute and the volume of the solution in liters.

The molar mass of BaI₂ is:

Ba (barium) atomic mass = 137.33 g/mol

I (iodine) atomic mass = 126.90 g/mol

Molar mass of  BaI₂ = (Ba atomic mass) + 2 × (I atomic mass)

= 137.33 + 2 × 126.90

= 137.33 + 253.80

= 391.13 g/mol

Given that the mass of BaI₂ is 413 g,

Number of moles = Mass / Molar mass

= 413 g / 391.13 g/mol

= 1.056 moles

Volume of solution = 750 ml = 750/1000 = 0.75 L

Finally, one can calculate the molarity of the solution using the formula:

Molarity = Number of moles / Volume of solution

= 1.056 moles / 0.75 L

= 1.408 M

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Answer:

mainly metal oxide use to react with both acid and bases to form salts such as zinc, aluminum etc.

Answer:

x

Explanation:

The qualitative data required can only be obtained from table X.

A questionnaire is a document that could be used to obtain the views of other people regarding a matter. The questionnaire serves the purpose of helping us to gather qualitative data.

In this case, the qualitative data that Prolly wants to gather is to find out  if males or females have a more negative attitude towards rodents. She has ensured that this is a confidential questionnaire.

Looking at the four tables as we can see them from the image that is attached to the question, the qualitative data required can only be obtained from table X.

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Answer:

1 s-orbital, 3 p-orbital and 5 d-orbital

Answer:

there are a total of nine orbitals in a third energy level

Explanation:

\(❤Answer \)

Volume of 106.9 mL from the concentrated solution should be taken and diluted to 350 mL.

⠀

⠀

Main I'd On Indian Brainly Is - HeartCrush

\(⚡ Explantion\)

We can use the formula.

c1v1 =c2v2

Where c1 is the concentration and v1 is volume of the concentrated solution.

c2 is the concentration

and v2 is the volume of the diluted solution to be prepared

9.00 M x V1 = 2.75 M x 350 mL

V1 = 106.9 mL

Volume of 106.9 mL from the concentrated solution should be taken and diluted to 350 mL.

If the students repeat the experiment with same variables as before, then there would be no change in the  results.

Variables are defined as any characteristics, number or quantity which can be measured . It can also be called as a data item . It is called as variable because they can vary and can have variety of values.

There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variable which do not change.

Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.

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