Freon-113, C2Cl3F3, has an enthalpy of vaporization of 27.0 kJ/mol and a normal boiling point of 48.0 °C. What is the vapor pressure (in atm) of Freon-113 at 22.0 °C? (R 8.314 J/KOmol). Show your work below. Include the units. a. 0.21 atm b. 0.35 atm c.0.41 atm d. 0.46 atme.4.4 atm

Answer:

20

Explanation:

The atomic number of this element is 20.

Atomic number is the number of protons within an atom.

Since we have been given that the number of protons is 20. Therefore, the atomic number is 20.

Mass number of the atom is the number of protons plus the number of neutrons.

For this atom, mass number = 20 + 20  = 40

Atomic number is 20

Answer:

standard carbon atom

Explanation:

Answer:

Explanation:

This is an isotope of carbon, more specifically, carbon-14. Carbon 14 has 6 protons, making the element carbon, and eight neutrons since 14-6 = 8.

An electrostatic precipitator is an industrial air filtration system that uses electricity to remove suspended particulate matter from a gas stream, such as exhaust gas.

Electrostatic precipitators are commonly used in power plants, cement and paper mills, and oil refineries to reduce particulate emissions. The working principle of an electrostatic precipitator is based on the fact that when a gas stream is passed through a high voltage electric field, particles in the gas stream become charged and are attracted to a collection electrode, where they are captured and removed from the gas stream.

Electrostatic precipitators have several advantages, including high efficiency, low operating costs, and the ability to handle high gas flow rates. However, they also have some disadvantages, such as the need for regular maintenance and the potential for ozone generation.

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A battery is a device that converts chemical energy into electrical energy through a process known as an electrochemical reaction.

When a battery is connected to a circuit, the electrochemical reaction causes a flow of electrons from the anode to the cathode, generating an electric current that can power a device.

The metal chosen for the anode must be capable of losing electrons easily, while the metal chosen for the cathode must be capable of accepting electrons. The choice of metals can also affect the voltage and capacity of the battery, as well as its overall efficiency.

In general, the metals used in a battery should have a large difference in their electronegativity values, which determines how easily an atom can attract electrons. Common metals used in batteries include zinc, lithium, nickel, and cadmium.

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Answer:

False because it is chemical change

Answer:

The main difference between an atom and a molecule lies in the size: while the atom is the smallest unit into which matter can be divided into any of its states, a molecule is the union of a group of atoms, that is, this composed of several atoms. Thus, for example, a water molecule is composed of two hydrogen atoms and one oxygen atom (H2O). Therefore, it can be said that atoms are the smallest unit in which the chemical elements of the world can be divided, while molecules are the particles of matter that are formed through the combination of these elements.

Given the conditions of using 2 nanomoles of enzyme in 1 mL of buffer and saturating amounts of substrate, the maximum velocity (Vmax) of the reaction would be 100 mmol/L/s.

Enzymes are natural enzyme that enhance the speed of chemical reactions occurring within cells.

The rate of a chemical reaction increases with enzyme concentration until all of the substrate is consumed and it levels off at a maximum rate called Vmax.

The Vmax is the maximum rate of an enzyme-catalyzed reaction when the enzyme is saturated with the substrate.

The formula for Vmax is kcat [E]total where kcat is the turnover number and [E]total is the total concentration of enzyme active sites.

kcat is defined as the number of substrate molecules converted to product per active site per second at saturation.

Substituting the given values in the formula, we have:kcat = 50 s-12 nanomoles of enzyme in 1 mL of buffer = 0.002 millimoles of enzyme in 1 mL of buffer

Converting 1 mL of buffer to L, we have 1 mL = 0.001 L

[E]total = 0.002 mmol / 0.001 L = 2 mmol/L

Substituting the values for kcat and [E]

total, we have: Vmax = kcat [E]

total= 50 s-1 * 2 mmol/L= 100 mmol L⁻¹ s⁻¹

Therefore, given the conditions of using 2 nanomoles of enzyme in 1 mL of buffer and saturating amounts of substrate, the maximum velocity (Vmax) of the reaction would be 100 mmol/L/s.

The question should be:

Assuming the kinetic measurements were conducted using 2 nanomoles of enzyme in 1 mL of buffer with saturating substrate concentrations, the Vmax value would be?, where 1 kat corresponds to a rate of 50 seconds⁻¹.

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The maximum safe operating temperature the engineer should recommend for this reaction is approximately 1063.77 degrees Celsius.

To calculate the maximum safe operating temperature, we need to consider the dimensions of the vessel, the maximum safe pressure, and the amount of gas inside.

First, let's convert the dimensions of the vessel from centimeters to meters:

Width = 48.0 cm = 0.48 m

Height = 57.6 cm = 0.576 m

Next, we need to calculate the volume of the vessel:

Volume = π * (radius)^2 * height

The radius of the vessel can be calculated as half of the width:

Radius = 0.48 m / 2 = 0.24 m

Volume = π * (0.24 m)^2 * 0.576 m

Volume ≈ 0.099 m^3

Now, we can use the ideal gas law to determine the maximum safe operating temperature. The ideal gas law is given by:

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.

Rearranging the equation to solve for T:

T = (PV) / (nR)

To calculate the number of moles, we can use the molar mass of carbon dioxide (CO2):

Molar mass of CO2 = 12.01 g/mol (for carbon) + 2 * 16.00 g/mol (for oxygen)

Molar mass of CO2 ≈ 44.01 g/mol

Converting the mass of carbon dioxide from kilograms to grams:

Mass of CO2 = 2.45 kg * 1000 g/kg

Mass of CO2 = 2450 g

Now, we can calculate the number of moles:

Number of moles = Mass of CO2 / Molar mass of CO2

Number of moles = 2450 g / 44.01 g/mol

Number of moles ≈ 55.67 mol

The gas constant R is approximately 8.314 J/(mol·K).

Now, we can substitute the values into the equation:

T = (3.40 MPa * 0.099 m^3) / (55.67 mol * 8.314 J/(mol·K))

T ≈ 1063.77 K

Converting from Kelvin to Celsius:

T ≈ 1063.77 °C

The maximum safe operating temperature that the engineer should recommend for this reaction is approximately 1063.77 degrees Celsius.

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Answer:

False

Explanation:

As a business, Starbucks must manage several critical risks to ensure its success. One critical risk is the potential for increased competition from other coffee shops and cafes, which could impact its market share and profitability. Additionally, Starbucks must manage the supply chain and operational risks, such as disruptions in the coffee bean supply or issues with its payment systems.

To maintain its success, Starbucks must also manage several key success factors. One important factor is its ability to maintain and grow its customer base, through marketing campaigns and delivering a high-quality customer experience. Additionally, Starbucks must continually innovate and introduce new products and services to stay relevant and meet evolving customer needs. Effective management of these critical risks and success factors is essential for Starbucks to maintain its position as a leader in the coffee industry.

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SF₆

Molar mass: 146.06 g/mol

mole = 25 : 146.06 = 0.171

molecules:

=0.171 x 6.02 x 10²³

=1.03 x 10²³

Answer:

1 molecule will equal 3 atoms :)

Explanation:

1 mole of water contains 6.02*10^23 molecules.

Each molecule of water contains 2 hydrogen atoms and 1 oxygen atom.

In the beaker there are 6.02*10^24 molecules of water.

=10*(6.02*10^23 molecules of water)

= 10 moles of water molecules.

1 molecule = 3 atoms

If a sample contained 3.01 x 10²³ atoms of tellurium, that would be 63.8grams.

no. of moles = 3.01 x 10²³ ÷ 6.02 × 10²³

no. of moles = 0.5mole

Mass of tellurium = 127.6g/mol × 0.5

Mass of Tellurium = 63.8grams.

Therefore, if a sample contained 3.01 x 10²³ atoms of tellurium, that would be 63.8grams.

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In general, if the change in temperature is proportional to the amount of copper(II) sulfate used, then increasing the amount of copper(II) sulfate used will lead to a corresponding increase in temperature change, and decreasing the amount of copper(II) sulfate used will result in a decrease in temperature change.

Temperature change in substances can be caused by a variety of factors, including the addition or removal of heat energy, changes in pressure, chemical reactions, and phase changes (such as melting, boiling, or freezing).

If this relationship does not hold, it could indicate that other factors are also at play, such as a limiting reagent or a change in reaction conditions. Therefore, comparing the results from parts A and B can help determine whether the change in temperature appears to be proportional to the amount of copper(II) sulfate used or not.

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The complete question is:

Copper(II) Sulfate and Zinc

The reaction between zinc (Zn) and copper sulfate (CuSO₄) is an oxidation-reduction reaction. Zinc reacts with copper sulfate to form zinc sulfate. So, zinc undergoes oxidation. At the same time, copper sulfate reduces to pure metallic copper and so undergoes reduction. Here is the equation for the reaction:

Zn + CuSO₄ → Cu + ZnSO₄.

In this task, you’ll carry out this oxidation-reduction reaction to ±nd the enthalpy of the reaction.

If you need a refresher on using a graduated cylinder and an electronic balance, watch the videos about measuring volume and measuring mass. Before you begin this task, review the lab safety guidelines.

Estimated time to complete: 1 hour

If you’ve purchased an Edmentum lab kit, remove the items that appear in the equipment list. The chemicals are located inside a box within the kit. You’ll also need distilled or tap water and a pen or a fine-tip marker for labeling test tubes.

You’ll need these materials:

Compare the results from parts A and B. Does the change in temperature appear to be proportional to the amount of copper(II) sulfate used? (edmentum lab)

150, tank, concentration

A tank filled with 1000 liters contains 400 liters of a solution saline A in which 20 kg of salt are dissolved then,

The solution for the concentration rho is 0.12 kg/l.

Therefore, the rate of salt being added to the tank is equal to the rate of salt being removed from the tank.

Using the above formula, the concentration of solution B can be calculated.

Let rho be the concentration of solution B.Concentration of saline A is given bymass of salt/volume of solution = 20/400 = 0.05 kg/l

Concentration of saline A after t minutes of mixing with saline B of concentration rho = (20 + 0.1 * rho * t)/(400 + (t * (5 - 3)))In 1 hour = 60 minutes, concentration = 0.12 kg/l

Therefore, we can say:(20 + 0.1 * rho * 60)/(400 + (60 * (5 - 3))) = 0.12

By solving this equation, we get  rho = 150 kg/m3.

Answer: 150, tank, concentration

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1 mol Na2SO4 = 142.04 g

3.35 mol Na2SO4 x 142.04 g / 1 mol = 478.04 g Na2SO4

1 mol NaOH = 40 g

478.04 g Na2SO4 x (2 mol NaOH / 1 mol Na2SO4) x (40 g NaOH / 1 mol NaOH) = 16.87 g NaOH

What is mol?

Mol (mole) is a unit of measurement used to quantify the amount of a substance. It is the amount of a substance that contains the same number of elementary particles as there are atoms in 12 grams of carbon-12. The elementary particles may be atoms, molecules, ions, electrons, or other particles, depending on the type of substance. A mol of a substance contains Avogadro's number of particles. The mol is the base unit of amount of substance in the International System of Units (SI), and its symbol is "mol."

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Answer:

Molecular Formula  C5H8

Explanation:

Answer:

The greater Earth's axial tilt angle, the more extreme our seasons are, as each hemisphere receives more solar radiation during its summer

Explanation:

Answer:

C

Explanation:

Answer:Naming Covalent compounds

A B

hexaboron silicide B6Si

chlorine dioxide ClO2

hydrogen iodide HI

iodine pentafluoride IF5

Explanation:

The work done (in J) in compressing a gas at constant temperature is calculated using the formula: W = -PΔV, where W is work done, P is the external pressure and ΔV is the change in volume.

Here, ΔV = Vf - Vi = 2.95 L - 6.63 L = -3.68 L [negative sign because of compression] and P = 735 torr. First, we need to convert the pressure to atm (1 atm = 760 torr):735 torr / 760 torr/atm = 0.967 atm Now, substituting these values in the above formula, we get: W = -(0.967 atm)(-3.68 L) = 3.55256 L atm Converting L atm to J (1 L atm = 101.3 J):W = (3.55256 L atm)(101.3 J/L atm) = 359.52 J

Therefore, the work done in compressing the gas at constant temperature from a volume of 6.63 L to a volume of 2.95 liters by an external pressure of 735 torr is 359.52 J.

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Answer:

Explanation:

Dang which subject is this history or science

With hot water comes hot steam, it fills the shower area with steam which raises the air temperature and the air then rises out of the shower

Answer:

In First compound the longest chain contains 7 C atoms.

In the Second compound the longest chain contains 9 C atoms.

In the Third compound the longest chin contains 7C atoms.

Explanation:

In first compound the longest chain contains 7 carbon atoms.In the second compound the longest chain contains 9 carbon atoms.In the third compound the longest chin contains 7 carbon atoms.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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The mass of the solution : 105 g

Given

5 g sugar

100 ml water

Required

The mass of the solution

Solution

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

\(\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}\)

ρ = density  

m = mass  

v = volume  

Density of water = 1 g/ml

So mass of water :

= density x volume

= 1 g/ml x 100 ml

= 100 g

So total mass of solution :

=mass sugar+mass water

= 5 g + 100 g

= 105 g