how are components separated using distillation? the substance with the [ select ] vapor pressure is vaporized first, and then it is

The mass of steam would be 33grams.

Steam is described as a substance containing water in the gas phase, and sometimes also an aerosol of liquid water droplets, or air.

Steam occurs due to evaporation or due to boiling, where heat is applied until water reaches the enthalpy of vaporization.

Parameters given are:

temperature of steam = 100° celsius

mass of ice = 150 grams

temperature of water = 50°c

Let the mass of the steam be ms and that of the ice be m_f. Then

L_Fmc +cw mc (F_f −0.0° C)=ms Ls +ms cw (100° C−T_f ).

where T_f =50 ° C is the final temperature. We solve for ms

​

: L_Fmc +cw mc (F_f −0.0° C)/ ms cw (100° C−T_f ).

substituting the values, we have Ms = 33grams.

mass is described as the quantitative measure of inertia, a fundamental property of all matter which in effect is the resistance that a body of matter offers to a change in its speed or position upon the application of a force.

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Philly's percent yield in this reaction is approximately 19.89%.

To calculate the percent yield of the reaction, we need to compare the actual yield (the amount of carbon dioxide produced in the reaction) to the theoretical yield (the maximum amount of carbon dioxide that can be produced based on the stoichiometry of the balanced equation).

The balanced equation for the reaction is:

2C7H6O2 + 15O2 -> 14CO2 + 6H2O

From the balanced equation, we can see that for every 2 moles of C7H6O2 (benzoic acid) reacted, 14 moles of CO2 are produced.

First, let's calculate the theoretical yield of CO2:

Molar mass of C7H6O2 (benzoic acid) = 122.12 g/mol

Moles of C7H6O2 = Mass / Molar mass = 120 g / 122.12 g/mol = 0.982 mol

According to the stoichiometry of the balanced equation, 0.982 mol of C7H6O2 will produce (14/2) * 0.982 mol of CO2.

Theoretical yield of CO2 = (14/2) * 0.982 mol * molar mass of CO2 = 6.859 * 44.01 g = 301.7 g

Now, let's calculate the percent yield:

Percent yield = (Actual yield / Theoretical yield) * 100

Percent yield = (60 g / 301.7 g) * 100 = 19.89%

Therefore, Philly's percent yield in this reaction is approximately 19.89%.

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Answer:

0

Explanation:

standard hydrogen is considered to be protium isotope of hydrogen that has one electron revolving around the nucleus containing one proton and no neutrons.

it's atomic number and mass number is 1

and number of neutrons = mass no. - atomic no.

= 1 - 1

=0

The incorrect rule for assigning oxidation numbers is Hydrogen is usually –1.

Hydrogen is usually +1

Oxidation numbers can be defined as that number which is assigned to an element in chemical reaction which represents the number of electrons lost or gained.

So therefore, the incorrect rule for assigning oxidation numbers is Hydrogen is usually –1.

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Answer:

B: Oxygen is usually –2.

Explanation:

Answer:

5.40 moles ( to 3 signif digits )

Explanation:

ONE mole is Avagadro's Number   6.022 x 10^23  atoms/mole

3.25 x 10^24 atoms / (6.022 x10^23 atoms/mole ) = 5.396 moles ~ 5.40 moles

a) The collision frequency of dimethyl ether can be calculated using the kinetic theory of gases. The collision frequency is given by the equation:

\(\[\text{{Collision frequency}} = \frac{1}{4} \sqrt{\frac{8 \cdot k \cdot T}{\pi \cdot m}}\]\)

where k is the Boltzmann constant, T is the temperature in Kelvin, and m is the mass of dimethyl ether molecule. Given that the angle-averaged radius of dimethyl ether is 0.25 nm, we can calculate the mass of the molecule using its density or molar mass.

b) To calculate the decomposition rate constant of (CH3)2CO, we need additional information such as the reaction mechanism and reaction conditions. The rate constant for a chemical reaction depends on factors like temperature, activation energy, and the presence of catalysts. Without these details, it is not possible to calculate the decomposition rate constant accurately.

In conclusion, the collision frequency of dimethyl ether at a specific temperature can be calculated using the kinetic theory of gases. However, to calculate the decomposition rate constant of (CH3)2CO, additional information about the reaction conditions and mechanism is needed.

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In rainbow, the color that has the longest wavelength is red which means option 5 is the correct choice.

Dispersion is described to be the spreading of white mild into its complete spectrum of colors, in truth we also can say a complete spectrum of wavelengths. The white mild turns into from solar and includes seven colors. On one end of the spectrum is red with the longest wavelength. Blue or violet mild has the shortest wavelength. White mild is a aggregate of all hues withinside the color spectrum. The colors of the rainbow are: Red, orange, yellow, green, blue, indigo, violet.

Therefore, option 5 is the correct choice.

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The least likely element combination would be hydrogen (H) and sodium (Na) since their ionization energies differ significantly.

To determine the least likely element combination, we need to consider the ionization energies and their relative values. The element combination that is least likely would involve elements with similar or close ionization energies.

Comparing the ionization energies:

1,312 kJ/mol (H) < 1,402 kJ/mol (N) < 1,314 kJ/mol (O) < 496 kJ/mol (Na)

Based on these values, the least likely element combination would be hydrogen (H) and sodium (Na) since their ionization energies differ significantly.

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Answer:One carbon atom forms a double bond with an oxygen atom and two single bonds with two hydrogen atoms

Explanation:

The amount of energy from the sun and precipitation level are critical factors in determining the type of vegetation in each terrestrial biome. These biomes include grassland, desert, tundra and forest.

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Answer:

The new volume of water in the pipette is 8.53 mL

Explanation:

The given information are;

The initial volume of water in the transfer pipette = 15.23 mL

The amount of water transferred from the pipette = 6.7 mL

The new volume of water in the transfer pipette is given as follows;

New volume of water in the pipette =  Initial volume of water in the pipette - Volume of water transferred out

Therefore, we have;

New volume of water in the pipette = 15.23 mL - 6.7 mL = 8.53 mL

The new volume of water in the pipette = 8.53 mL

Answer:

8.5

Explanation:

15.23 - 6.7 = 8.53

The correct amount of sig figs would make the answer 8.5

The volume of the balloon will be approximately 45 liters when the pressure decreases to 748 torr.

According to Boyle's Law, at constant temperature, the pressure and volume of a gas are inversely proportional. This means that as the pressure decreases, the volume increases, and vice versa.

The relationship between pressure and volume is given by the equation P1V1 = P2V2, where P1 and V1 represent the initial pressure and volume, and P2 and V2 represent the final pressure and volume.

In this case, the initial volume of the balloon is given as 44.5 L, and the initial pressure is 758 torr. The final pressure is given as 748 torr, and we need to find the final volume.

Using the formula P1V1 = P2V2, we can rearrange it to solve for V2:

V2 = (P1 * V1) / P2

Plugging in the values, we get:

V2 = (758 torr * 44.5 L) / 748 torr

Simplifying the equation, we find:

V2 = 45 L

Therefore, the volume of the balloon will be 45 liters when the pressure decreases to 748 torr under constant temperature.

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Hemoglobin and myoglobin are both molecules that are involved in the transportation of oxygen in the body. The oxygen dissociation curve for both of these molecules is sigmoidal in shape (s-shaped).

As oxygen binds to these molecules, the shape of the molecule changes, enhancing further oxygen binding. The binding pattern for these molecules is considered cooperative, meaning that as more oxygen molecules bind, it becomes easier for additional oxygen molecules to bind. Hemoglobin delivers oxygen more efficiently to tissues compared to myoglobin. Myoglobin has a hyperbolic-shaped oxygen dissociation curve, while hemoglobin's is sigmoidal.

Hemoglobin has a greater affinity for oxygen than myoglobin. Carbon monoxide binds at an allosteric site on hemoglobin, lowering its oxygen binding affinity. Oxygen binds reversibly to both hemoglobin and myoglobin, not irreversibly. In conclusion, statements a, b, c, d, f, and h apply to hemoglobin and myoglobin, while statement e applies only to myoglobin.

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We need ti find how many elements there are in the first period and what are these.

To know what is the first period we must use that

Seeing the periodic table, the first row has two elements.

We can see that these elements are H ( hydrogen ) and He ( helium ).

ANSWER:

Firs period in the periodic table has two elements and they are called hydrogen and helium.

Answer:

C: was once buried underground

Explanation:

Hope this helps!

Answer:

The correct answer you are looking for is B i have got 100% on this test.

Explanation:

hop this helps! └(^o^)┘  ↖(^ω^)↗

The Ka for the acid can be calculated using the pH of the solution. The pH of 2.64 indicates that the concentration of H+ ions in the solution is 10^(-pH), which is equal to 10^(-2.64).

To find the concentration of the acid, we can use the equation:

[H+] = [A-] = √(Ka × C)

Where [H+] is the concentration of H+ ions, [A-] is the concentration of the acid, Ka is the acid dissociation constant, and C is the concentration of the solution.

Given that the concentration of the solution is 0.0158 M, we can substitute the values into the equation:

10^(-2.64) = √(Ka × 0.0158)

Squaring both sides of the equation, we have:

10^(-5.28) = Ka × 0.0158

Simplifying the equation:

Ka = 10^(-5.28) / 0.0158

Using a calculator, the Ka value can be determined.

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Volume expresses the three-dimensional space that an object occupies. The volume of this pond is 3.5 x 10¹º microliters.

Acid rain is the form of precipitation that includes acidic components like nitric or sulfuric acid that fall from the atmosphere on the earth's surface.

1 KL = 1000 L

1 L has 1 x 100 microliters

In 35 KL the volume will be,

35 KL (1000 L/1kL) (1 x 10° microliters / 1 L) = 3.5 x 1010 microliters

Therefore, the volume is 3.5 x 1010 microliters.

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Answer: D

Explanation: 3.5 x 10^10 mL

Answer:

The pH scale ranges from 0-14.

Explanation:

Zero is the most acidic measurement while six would be the least acidic of the acids, seven is a pure substance, neither acidic nor basic, eight is the least basic measurement while 14 is the most basic of the bases.

The molar heat of neutralization for the reaction is 55 kJ/mol. The answer is (a).

The molar heat of neutralization, ΔH, for the reaction can be calculated using the following formula: ΔH = q/n where q is the heat released, and n is the number of moles of HCl.
First, we need to calculate the number of moles of HCl:
n = m/M
where m is the mass of HCl and M is the molar mass of HCl.
M(HCl) = 1.008 + 35.45 = 36.458 g/mol
n = 5.5 g / 36.458 g/mol = 0.151 mol
Now we can calculate the molar heat of neutralization:
ΔH = 8300 J / 0.151 mol = 55,000 J/mol
Therefore, the molar heat of neutralization for the reaction is 55 kJ/mol. The answer is (a).

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Answer:

No

Explanation:

You can not have a reaction that produces "no mass". This breaks the law of conservation of mass. When gasses are produced, they will have a specific amount of mass associated with them which means they will have a weight. They will have to be accounted for

The pressure of the argon be if we increase the volume to 500ml is fond to be  0.546atm

The exact pressure can be calculated using the Ideal gas law PV=nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant and T is the temperature in Kelvin.

P1 v1/T1 = P2v2/T2

=> P2 => 2x 100x 373 /273 x500

      => 0.546atm

The pressure of the argon would decrease if the volume is increased while the temperature is held constant. This is because the pressure of a gas is inversely proportional to its volume, as stated by Boyle's Law. As the volume increases, the pressure decreases. If the temperature is also increased, the pressure will decrease even further, as the gas particles will have more energy and will be moving faster, which will cause them to spread out and fill the larger volume. Therefore, if the volume of the argon is increased from 100ml to 500ml and the temperature is also increased from 0C to 100C, we would expect the pressure to decrease significantly.

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argon at a pressure of 2 atm, fills a 100 ml vial at a temperature of 0C. What would the pressure of the argon be if we increase the volume to 500 ml, and the temperature at 100C?

A chemical reaction accompanied by a release of energy is called exothermic reaction. A chemical reaction involves breaking of chemical bonds and formation of new ones. This process involves either absorption or release of energy.

An exothermic reaction is one in which energy is released in the form of heat, light, or sound. In other words, the energy of the reactants is higher than the energy of the products, resulting in a release of energy to the surroundings. Examples of exothermic reactions include combustion reactions, such as burning of fuels, where energy is released as heat and light. Other examples include the reaction of acids with bases, where energy is released as heat and water. Exothermic reactions are used in many industrial processes, such as in the production of fertilizers, plastics, and pharmaceuticals. They are also used in everyday life, such as in the combustion of fuels for heating and cooking.

On the other hand, an endothermic reaction is one in which energy is absorbed from the surroundings. The energy of the products is higher than the energy of the reactants, resulting in a net absorption of energy. Examples of endothermic reactions include melting of ice, where energy is absorbed from the surroundings, and photosynthesis, where energy from the sun is absorbed by plants.

A catalyzed reaction is one in which a catalyst is used to speed up the rate of the reaction, but it does not affect the thermodynamics of the reaction and whether it is exothermic or endothermic.

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Burning is a chemical change where the paper reacts with oxygen in the air, producing heat and light.

Paper and oxygen in the air undergo a chemical reaction while burning, which releases heat and light energy. The chemical makeup of the paper changes, decomposing into less complex molecules like carbon dioxide, water vapour, and ash. The paper's chemical bonds are broken during the burning process, and new bonds with oxygen are formed in their place.

The chemical change between the paper and oxygen causes the production of heat and light energy. This energy is an indication of the energy that the paper's chemical bonds store and that is released upon combustion.

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Burning is a chemical change where the paper reacts with oxygen in the air, producing heat and light.

The process of burning can best be described as a chemical change where the paper reacts with oxygen in the air, producing heat and light. This process is known as combustion, which involves a chemical reaction between a substance and oxygen, resulting in the release of energy in the form of heat and light. During combustion, the paper undergoes a chemical reaction with oxygen, resulting in the formation of new chemical compounds, such as water vapor and carbon dioxide, along with the release of energy in the form of heat and light.

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Answer:

Answer: Easily recognized and are still alive today

Explanation:

The specific set of traits that may index fossils possess are as follows:

An index fossil may be defined as a type of fossil which is significantly utilized in order to define and identify geologic periods. Such fossils are dead and organic remains of past organisms that were preserved and buried deep into the soil millions of years ago.

Index fossils are those fossils that are remarkably utilized in order to demonstrate the dating of rocks.

Apart from the above-mentioned traits, index fossils may also possess some traits like they are distinctive, widespread, abundant in nature, limited in the geologic time period, etc.

Therefore, the specific set of traits that may index fossils possesses is well-mentioned above.

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Answer:

C. Transition metals

Explanation:

Out of the answers transition metals have the most elements on the periodic table.    

The valorization of lignocellulosic biomass through a biorefinery approach offers a promising strategy for producing nanocellulose and other value-added products.

By utilizing various processing techniques, lignocellulosic biomass can be converted into valuable materials, such as nanocellulose, which has unique properties and diverse applications. The biorefinery approach allows for the efficient extraction and utilization of different components of lignocellulosic biomass, maximizing its economic and environmental benefits.

Lignocellulosic biomass, which includes materials like wood, agricultural residues, and dedicated energy crops, is an abundant and renewable resource. However, its complex structure and composition present challenges for efficient utilization. Through a biorefinery approach, the lignocellulosic biomass can be processed in a sequential manner to extract and convert its different components into value-added products.

The first step in the biorefinery approach involves pretreatment, which aims to break down the lignocellulosic structure and remove impurities. Various pretreatment methods, such as mechanical, chemical, and enzymatic treatments, can be employed depending on the biomass feedstock and desired end products. This step enhances the accessibility of cellulose, hemicellulose, and lignin, the main components of lignocellulosic biomass.

Following pretreatment, enzymatic hydrolysis is used to convert cellulose and hemicellulose into fermentable sugars. These sugars can then be used as feedstock for the production of biofuels, biochemicals, or nanocellulose. Nanocellulose, derived from cellulose, possesses exceptional mechanical strength, high aspect ratio, and biodegradability, making it a valuable material for various applications, including nanocomposites, films, coatings, and medical devices.

The biorefinery approach also enables the extraction and utilization of lignin, a complex aromatic polymer, for the production of high-value chemicals, such as phenolic compounds, adhesives, and carbon fibers. Moreover, other byproducts, such as organic acids and furfurals, can be recovered and used in the chemical industry.

Overall, the valorization of lignocellulosic biomass through a biorefinery approach allows for the efficient utilization of its components, resulting in the production of nanocellulose and other value-added products. This approach not only maximizes the economic potential of lignocellulosic biomass but also contributes to the development of sustainable and environmentally friendly processes in the bio-based industry.

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The order of the steps, from first to last, is as follows based on the information in the question:

1. Salt is broken down into cations and anions.

2. Anion hydration.

3. Cation hydration.

4. Cations and anions that have been dissolved start to settle as a solid salt.

5. The rate of dissolution and recrystallization are equal.

Without hydration of the ions, the cation and anion cannot get separated. The three processes of ion dissociation, cation hydration, and anion hydration must all take place at once.

Water is a great solvent that can dissolve a wide variety of compounds due to its polarity and capacity to create hydrogen bonds.

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Answer:

C: The solution has become saturated.

Explanation:

The sugar is not dissolving in the tea because the solution has become saturated. Saturation occurs when the concentration of solute (sugar) in a solvent (tea) has reached its maximum limit, beyond which no more solute can dissolve. At this point, the undissolved solute will settle at the bottom of the container. In this case, the tea is unable to dissolve any more sugar, so it stays at the bottom of the glass.

Answer:

C

Explanation:

Answer:

Melting point

Explanation:

Melting point is a intensive property and Intensive properties can be used to help identify a sample because these characteristics do not depend on the amount of sample, nor do they change according to conditions.

IF IT WAS HELPFUL HIT THE CROWN

Answer:

Explanation:

Yes melting point!

Answer:

In a survey of a group of people, it was found that 60 0f them have

business, 45 have government jobs, 125 have farming, 27 have business

only, 15 have government job only, 10 have business and government

job only, 5 have government job and farming only.

i) How many people have all the profession?

ii) How many people were there in a survey?