What volume of 2M NaCl solution is needed to make 500ml of 5M NaCl solution?

Answer: Fe is the element that is being oxidized (oxidation number changes from +2 to +3) while Cl is the element that is reduced (oxidation number changes from +5 to -1) in the given reaction.

Explanation:

The question requires us to find the element that is oxidized and the one reduced in the following chemical reaction:

To solve this problem, we need to determine the oxidation number of all elements in the reactants and products sides, and then identify the elements that had their oxidation number increased (oxidized species) and decreased (reduced species).

To identify the oxidation numbers, we'll need to remember a few points:

- K is an alkali metal (part of group 1 in the periodic table), and it usually assumes the oxidation number +1;

- O usually presents oxidation number -2, except in a few specific cases;

- the anion (SO4) presents total charge -2 (in this anion, S presents oxidation number +6 and O, -2);

- H usually presents oxidation number +1.

Next, let's identify the oxidation number of all elements involved in the reaction, on both sides of the chemical equation. Since all compounds are neutral (i.e., they do not present charge), the sum of all oxidation numbers must be 0:

(note that the oxidation number of each element is indicated in red, above the respective element, while the contribution of this element to the molecule charge, considering the number of atoms, is represented in blue below the element).

In the image above, we can see that Cl has its oxidation number changing from +5 in KClO3 to -1 in KCl (highlighted in purple), while Fe has its oxidation number changing from +2 in FeSO4 to +3 in Fe2(SO4)3 (highlighted in green).

Therefore, we can say that Fe is the element that is being oxidized while Cl is the element that is reduced in the given reaction.

Answer:

The brain stem

Explanation:

Answer:

hfufhdufdhfdufhdufhdudf

Explanation:

ring a bell?

To determine the density of NH3 gas at 435 K and 1.00 atm, we can use the ideal gas law equation:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

First, we need to find the number of moles of NH3 gas:

n = PV/RT

n = (1.00 atm) x V / [(0.08206 L atm/mol K) x (435 K)]

Assuming the volume of NH3 gas is 1 L:

n = (1.00 atm) x (1 L) / [(0.08206 L atm/mol K) x (435 K)]
n = 0.0276 mol

Next, we can use the formula for density:

density = mass/volume

To find the mass of NH3 gas, we can use its molar mass of 17.03 g/mol:

mass = n x molar mass
mass = 0.0276 mol x 17.03 g/mol
mass = 0.47 g

Therefore, the density of NH3 gas at 435 K and 1.00 atm is:

density = mass/volume
density = 0.47 g/1 L
density = 0.47 g/L
To determine the density of NH3 gas at 435 K and 1.00 atm, we can use the Ideal Gas Law formula, which is PV = nRT. Here's a step-by-step explanation:

1. Write down the given information:
  - Temperature (T) = 435 K
  - Pressure (P) = 1.00 atm
  - We also need the molar mass of NH3, which is 14.01 (N) + 3 * 1.01 (H) = 17.03 g/mol

2. Rearrange the Ideal Gas Law formula to solve for the number of moles (n) in one liter of NH3 gas:
  - n = PV/RT

3. Substitute the given values:
  - n = (1.00 atm) * (1 L) / (0.0821 L·atm/mol·K) * (435 K)
  - n ≈ 0.0279 mol/L

4. Calculate the mass of NH3 in one liter:
  - Mass = n * molar mass
  - Mass = 0.0279 mol/L * 17.03 g/mol ≈ 0.475 g/L

5. Determine the density of NH3 gas:
  - Density = Mass / Volume
  - Density ≈ 0.475 g/L / 1 L ≈ 0.475 g/L

So, the density of NH3 gas at 435 K and 1.00 atm is approximately 0.475 g/L.

To know more about density visit:

brainly.com/question/29775886

#SPJ11

Answer:

There is actually 1 mole in 54.3 g of CO2

Answer:

entropy

Explanation:

The vapor pressure of Substance X can be calculated using its enthalpy of vaporization and boiling point.

The vapor pressure of a substance is a measure of the pressure exerted by its vapor in equilibrium with its liquid phase at a specific temperature. It can be calculated using the Clausius-Clapeyron equation, which relates the vapor pressure to the enthalpy of vaporization and the temperature.

The equation is given as:

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

where P1 and P2 are the vapor pressures at temperatures T1 and T2 respectively, ΔHvap is the enthalpy of vaporization, and R is the ideal gas constant.

To calculate the vapor pressure of Substance X, we need to know its enthalpy of vaporization and boiling point. With this information, we can substitute the values into the Clausius-Clapeyron equation and solve for the vapor pressure at the given temperature.

Remember to round the answer to the appropriate number of significant digits based on the given question.

Learn more about vapor pressure

brainly.com/question/29640321

#SPJ11

Answer:

V=0.430 Liters

Explanation:

First off you need to convert ml to l and celsius to kelvin, in order for them to be in the S.I.

So, 350.0mL is 0.350 L and 23.0 C is (273.15+23=) 296.15 K (you can ignore the 0.15)

From the equation pV=nRT, lets name this equation (1),  we can tell that the number of moles, pressure, and R, stay the same. The only thing changing is the volume, and temperature.

With the information given, let's figure out the pressure. From equation (1) if we solve it for the pressure of the gas, p=nRT/V => p=nR*296.15/0.350 => p=846.15 *nR

Now, we have to figure out the volume of the gas at 90.0 C (363.15 K), and solve equation (1) for volume, using the pressure we previously found.

v=nRT/p => v=nR*363.15/846.15*nR => (the nR's from top and bottom go away) v=0.429 L

Since we used 273.15 for the conversion of celsius to Kelvin, we could round up the number to

V=0.430 Liters

The movement of water on and above the earth's surface is called the hydrologic cycle, or the water cycle. Hope this helps!

Answer:

8

Explanation:

Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus

The chemical reactions are greenhouse Gases, aerosols and carbon dioxide and water vapor begins to condense out of air,  temperature freezing below point are physical changes.

1) Human activities such as the combustion of fossil fuels, has increased the levels of greenhouse gases----  Chemical reaction.

2) At dew point, the water vapor begins to condense out of air----  Physical changes.

3)  Human activities, such as the combustion of fossil fuels, generate the aerosols----  Chemical reaction.

4) You observe hail when the temperatures are below the freezing point----  Physical changes.

5) Carbon dioxide is produced during respiration of plants, animals, fungi, and microorganisms-----  Chemical changes.

Atmospheric Gases Atmosphere Composition The by products of the species that this really nourishes strongly impact the composition of the environment on Earth. 0.038% of carbon dioxide, 20.95% of oxygen, 78.08% of nitrogen, and 0.93% of argon are also all contained in dry air from of the earth's atmosphere.

All life on Earth is covered by that of the environment, a layer of gases that controls temperatures within a narrow range and diverts harmful suns radiation.

The layer of gases that surrounds Earth and contains the air we breathe is called as an atmosphere. The gravitational pull of the planet's neighbor , Earth, keeps it close to its surface. To measure air pressure, use a barometer. The three primary components of the atmosphere comprise nitrogen, oxygen, and argon.

Complete Question :

Which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? Drag the appropriate items to their respective bins. View Available Hint(s) Reset Help Human activities such as the combustion of fossil fuels, has increased the levels of greenhouse At dew point, the water vapor begins to condense out of air. gases. Human activities, such as the combustion of fossil fuels, generate the aerosols. You observe hail when the temperatures are below the freezing point. Carbon dioxide is produced during respiration of plants, animals, fungi, and microorganisms. Chemical reaction Physical change

Learn more about Chemical Reaction:

https://brainly.com/question/12276877

#SPJ4

I believe it does. The law of conservation of mass is a general principle that states that the total mass of closed or isolated systems remains constant. Thus, when chemical reactions occur, there is no change in the total mass of the closed system. If two substances A and B react to produce two different substances C and D, then the total mass of all four of these substances will remain constant, even if the ratios of their masses change.

As an example of how CO2 is utilized in industry, it is employed as an inert gas in welders and flame extinguishers, as just a pressurizing gas for air cannons and oil recovery, as a supercritical solvent in coffee decaffeination and supercritical drying.

Chemical intermediaries, such as methanol, syngas, & formic acid, can be produced from CO2 using a variety of catalysts. These molecules subsequently act as feedstocks in those other industrial processes.Additionally, CO2 can be converted by catalysts to polymers, which serve as building blocks for plastics, adhesives, & medications.

The creation of ethanol, fertilizer, natural gas processing, hydrogen synthesis in refineries, and, most recently, coal-fired power generation are among the industrial processes where large-scale carbon capture has been shown and is currently in use.

To know more about CO2 visit:

https://brainly.com/question/3049557

#SPJ4

Peptide bonds, hydrogen bonds, disulfide linkages, van der Waals, and electrostatic forces of attraction are the chemical bonds that stabilize the different structures in primary, secondary, tertiary, and quaternary structures.

The advanced structure of proteins gives rise to two kinds of major molecular shapes which are fibrous as well as globular structures. The main forces which are involved in stabilizing the secondary along with the tertiary structures of proteins include hydrogen bonds, disulfide type linkages, van der Waals attraction, and electrostatic forces of attraction.

The primary structure is generally determined by adjoining peptide bonds where the link is adjoining amino acids in sequential order. Tertiary structure is determined by the existence of disulfide bonds in between hydrophobic interactions as well as cysteine residues whereas the quaternary type structure is determined by multiple subunits of a protein that undergo various interactions.

Hydrogen bonds exist in a protein molecule as its large number can form between adjacent regions of the polypeptide chain in folded form and stabilize its three-dimensional kind of shape.

Learn to know more about levels of protein structure on

https://brainly.com/question/17338734

#SPJ4

The molecules can be classified as polar or nonpolar based on their molecular geometry and the distribution of their polar bonds.

Carbon dioxide (CO2) is a linear molecule with two polar bonds between the carbon atom and the oxygen atoms. However, due to its symmetrical geometry, the polar bonds in CO2 cancel each other out, resulting in a nonpolar molecule.

The oxygen atoms pull the electron density towards themselves, creating partial negative charges, while the carbon atom has a partial positive charge. However, since the molecule is linear and symmetrical, these partial charges are balanced, making CO2 nonpolar.

Water (H2O) is a bent or V-shaped molecule with two polar bonds between the oxygen atom and the hydrogen atoms. The oxygen atom is more electronegative than the hydrogen atoms, causing an uneven distribution of electron density.

This leads to a partial negative charge on the oxygen atom and partial positive charges on the hydrogen atoms. Due to its asymmetrical shape, the polar bonds in H2O do not cancel each other out, resulting in a polar molecule. The presence of a lone pair of electrons on the oxygen atom also contributes to the polarity of water.

Learn more about Molecular geometry

brainly.com/question/31993718

#SPJ11

Answer:

a- controlled variable

Explanation:

Answer:TeCl2

Explanation:

52.66 grams of acetylene are in the tank.

PV=nRT is the formula for ideal gases, where P is the pressure and R is the constant and T is the temperature (P is 1.39 atm in this case)

Volume = 35.0 L

Gas constant = 0.08206 L.atm/K.mole

Temperature = 20.0 °C  = 293 °C

We also know that we can apply the formula ;

Number of mole(n) = \(\frac{MmPV}{RT}\)

m = ( 26.04 × 1.39 × 35 )/ (0.08206 × 293.15)

m = 52.66 g

Thus, the mass is 52.66 grams.

Learn more about ideal gases here:

https://brainly.com/question/12281987

#SPJ4

The theoretical yield is the amount of product that would be obtained if the reaction proceeded with 100% efficiency.

Once you have the theoretical yield and the actual yield (which is given as 57.75 g of H2O in this case), you can use the following formula to calculate the percent yield:

Percent Yield = (Actual Yield / Theoretical Yield) x 100

In this case, the actual yield is 57.75 g and the theoretical yield is 60.00 g. Therefore, the percent yield is:

Percent yield = (57.75 g / 60.00 g) * 100% = 96.25%

Therefore, the percent yield for this reaction is 96.25%.

To know more about theoretical yield:

https://brainly.com/question/14966377

#SPJ1

Answer:Energy from uranium harnessed for nuclear power:

Nuclear power is generated by the process of Fission. The nuclear energy is generated by splitting the atoms of uranium which creates a lot of heat which produces steam and the pressure from the steam is used by a turbine generator to create electricity.

This is how uranium is harnessed for nuclear power. The uranium fuel is arranged in such a manner that a fission chain reaction can take place the atoms can be broken down. The heat produced spins the turbine and the generator gains power.

Explanation:

The molarity of the KCl solution is 4.04 moles/ litre

Molarity (M), which is determined by dividing the solute's mass in moles by the volume of the solution in liters, is the most widely used unit to express solution concentration: liters of solution/moles of solute equals M. One liter of a solution with a 1.00 molar concentration (1.00 M) contains 1.00 moles of solute.

The amount of a substance in a specific volume of solution is known as its molarity (M). The number of moles of a solute per liter of a solution is known as molarity. The molar concentration of a solution is another name for molarity.

Molarity = no. of moles/ volume of solution

Volume of KCl solution given is 0.25 L

molarity = 1.01 / 0.25

molarity = 4.04 moles/ litre

TO know more about molarity you may visit the link:

https://brainly.com/question/8732513

#SPJ4

The parent nucleide that produces Am-241 through beta decay is Plutonium-241. This is because Plutonium-241 undergoes beta decay to form Americium-241, emitting a beta particle in the process. Knowing this information is crucial in nuclear physics and chemistry, as it helps us understand how different isotopes decay over time.

When a nuclide undergoes beta decay and produces Am-241 (Americium-241), the parent nuclide is Plutonium-241.

In beta decay, a neutron is converted into a proton, which results in an increase in the atomic number (protons) of the element, while the mass number (protons + neutrons) remains unchanged.

In this case, Plutonium-241 (with atomic number 94) decays through beta decay and forms Americium-241 (with atomic number 95).

The other isotopes mentioned, such as Plutonium-240, Plutonium-242, Curium-242, and Curium-241, do not result in Am-241 after beta decay due to differences in their mass numbers and atomic numbers.

To know something about beta decay, click below.

https://brainly.com/question/4184205

#SPJ11

The ionic bond between Na and P has formula unit Na3P.

What is the formula unit?

Formula units is the chemical formula which gives all the ions present in the lowest ratio possible to make it neutral charge of an ionic compound. For example, the formula unit for sodium chloride can be written as NaCl where charge on Na is +1 and charge on Cl is -1. So to make it neutral they can be cancelled and written as NaCl.

In sodium phosphide, the charge on Na (sodium) ion is +1 and the charge on the P (phosphorous) ion is -3. Therefore, make the charges neutral, 3 Na ions need to be added to 1 P ion. Formula units can be used to describe or represent the molecules or the elements which make up a substance.

Hence, Na3P is the formula unit of Na and P in sodium phosphide.

To learn more about formula units from the given link https://brainly.com/question/24529075

#SPJ13

Answer:

Because different isotopes have different numbers of neutrons, they do not all weigh the same or have the same mass. Different isotopes of the same element have the same atomic number. They have the same number of protons. The atomic number is decided by the number of protons.

Hope this helps!!!!

Explanation:

The letter A on a wave diagram typically represents the amplitude, which is a crucial measurement that helps us understand the energy and intensity of a wave.

The amplitude is an essential property of a wave, as it provides information about the energy carried by the wave and its intensity. It is defined as the maximum displacement of a wave from its equilibrium position, measured in units of length. In the case of a transverse wave, such as a light wave or a water wave, the amplitude is the maximum height of the wave's crest or the depth of its trough from the baseline.
For a longitudinal wave, such as a sound wave, the amplitude is the maximum compression or rarefaction of the medium particles from their equilibrium positions. Amplitude is important because it directly correlates with the energy of the wave. A larger amplitude indicates a higher energy wave, while a smaller amplitude signifies a lower energy wave.

Learn more about amplitude here:
https://brainly.com/question/9525052

#SPJ11

Answer:

¹/₂₄ dm³ or 0.417 dm³

Explanation:

6.0 M = 6.0 mol/dm³

0.5 M = 0.5 mol/dm³

500 ml = 0.5 dm³

V = volume of 6.0 M solution required (dm³)

Volume × concentration = moles:

0.5 × 0.5 = 0.25

500 ml or 0.5 dm³ of 0.5 M solution contains 0.25 moles of HNO₃

We have 6.0 M solution available, we need 0.25 moles;

Using the formula, we can find the volume of the solution that contains this amount of moles:

6.0 × V = 0.25

V = 0.25/6

V = ¹/₄(¹/₆)

V  = ¹/₂₄

¹/₂₄ dm³ of the 6.0 M solution has the necessary moles of HNO₃ to achieve the desired volume of solution at the desired concentration;

Another liquid (or solution), such as water, without any HNO₃ must be used to make up the total 500 ml or 0.5 dm³, diluting the HNO₃ to the desired concentration:

0.5 - ¹/₂₄ = ¹²/₂₄ - ¹/₂₄

= ¹¹/₂₄

¹/₂₄ dm³ of the 6.0 M solution should be diluted with the ¹¹/₂₄ dm³ of liquid (0 M HNO₃ solution) to produce 0.5 dm³ of 0.5 M solution

Answer:

The closest shell to the nucleus is called the "1 shell" (also called the "K shell"), followed by the "2 shell" (or "L shell"), then the "3 shell" (or "M shell"), and so on farther and farther from the nucleus.

When 49.4 mL of the 0.721 M lead(II) nitrate reacts with the 99.6 mL of 0.807 M the sodium chloride, 0.830 kJ of the heat is released at constant pressure. The ΔH°  for this reaction is 20.81 kJ/mol.

The molarity of the NaCl = 0.807 M

The volume of NaCl = 49.4 mL

The moles = molarity × volume in L

The moles = 0.0398 mol

The molarity of the  lead(II) nitrate = 0.721 M

The volume of  lead(II) nitrate = 99.6 mL

The moles = molarity × volume in L

The moles = 0.0718 mol

The equation is as :

Pb(NO₃)₂(aq) + 2NaCl(aq) → PbCl₂(s) + 2NaNO₃(aq)

1 mole of the Pb(NO₃)₂ reaction with the 2 mole of the NaCl

The mole of the NaCl = 0.143 mol

The NaCl is the limiting reactant.

The heat, q = 0.830 kJ

ΔH° = q / n

ΔH° = 0.830 / 0.0398

ΔH° = 20.81 kJ/mol.

To learn more about heat here

https://brainly.com/question/15143407

#SPJ4

Answer:

Unbalanced forces are forces whose net amount is not zero.

This can take place when two equal forces are acting in the same direction or opposite direction but with different forces.

Unbalanced forces make some change in the position of the object on which force is exerted.

Answer:

This can take place when two equal forces are acting in the same direction or opposite direction but with different forces.

Unbalanced forces make some change in the position of the object on which force is exerted.

If the theoretical yield is 20 grams and the actual yield is 17 grams, the percent yield would be 85%.

To get the mass per mole, divide the reactant's mass by its molecular weight. As an alternative, we can multiply the millilitres of the reactant solution by the grams per millilitre of the liquid solution.

Once you have the theoretical yield, you can use the following formula to calculate the percent yield:

percent yield = (actual yield / theoretical yield) x 100%

For example, if the theoretical yield is 20 grams and the actual yield is 17 grams, the percent yield would be:

percent yield = (17 grams / 20 grams) x 100% = 85%

To know more about theoretical yield visit:-

https://brainly.com/question/14966377

#SPJ9

984 kpa is the absolute pressure of gas cylinder when full.

101 kpa is the absolute pressure of gas cylinder when it’s empty.

Pressure is the force exerted on a particular surface area and we know that Absolute pressure is equal to the sum of gauge pressure and atmospheric pressure .Barometric pressure is the best example for absolute referenced pressure. Absolute pressure is measured in N/m² or pascal & kpa which is short for kilopascal

P(absolute)=P(gauge)+P(atm)

Here P(gauge) is pressure due to the contents present inside the cylinder

P(atm) is the pressure exerted by the atmosphere

=>883 kpa+101 kpa =984 kpa when full

Note that when the cylinder is empty the gauge pressure is zero as there is no substance to exert pressure So, only atmospheric pressure is exerted.

P(absolute)=0(because the cylinder is empty) + 101 kpa

Therefore P(absolute) =101 kpa when cylinder is empty.

To study more about Absolute Pressure visit

https://brainly.com/question/15734722

#SPJ4