Jet fuel has a melting point of -48° C and a boiling point of 163°C
What state will it be at a temperature of 0°C
Select one:
a. Plasma
b. Solid
C. Gas
d. Liquid

Answer:

0.086

Explanation:

got it on acellus

The mass of the dry solute recovered from the given data is 0.086 g.  Option C

To determine the mass of the dry solute recovered, we need to subtract the mass of the boat from the mass of the boat with the dry solute.

Given the data provided:

Boat Mass: 0.730 g

Boat + Solution: 0.929 g

Boat + Dry: 0.816 g

To find the mass of the dry solute, we subtract the boat mass from the boat + dry mass:

Mass of Dry Solute = (Boat + Dry) - (Boat Mass)

Mass of Dry Solute = 0.816 g - 0.730 g

Mass of Dry Solute = 0.086 g

Therefore, the correct answer is c) 0.086 g.

The mass of the dry solute recovered from the given data is 0.086 g. It is important to note that the mass of the dry solute is obtained by subtracting the mass of the boat from the mass of the boat with the dry solute, as the boat mass represents the weight of the empty boat or container used in the experiment.

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Answer:

all of the above

Explanation:

all of this is in the solar system

The volume of pycnometer is 20.409 ml.

Volume of pycnometer is determined by using the general formula of  density which is,

density=mass/volume

Considering the data given, mass of pycnometer =27.144 g

According to the standards , density of pycnometer at 25°C=1.33g/cm³

Substituting the values in the formula,

volume=mass /density=27.144/1.33=20.409 cm³

Pycnometer is an instrument which is used to measure the relative density of liquids and solids.The density of liquids is determined by using relative density and for solids the density is determined by weighing them.

It is based on Boyle's law which helps in determination of pressure-volume relationship. There are 2 types of this instrument ,one that which works on a basis of gas expansion and the  other one which works on the basis of variable  volume.

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Answer:

The reactants are listed on the left, and the products are listed on the right. They are separated by an arrow. The arrow can be read as yields, gives, or reacts to produce.

for centuries scholars have argued over how to explicate  certain cryptic passages in Milton’s plays and poems.

Cryptic Passage (originally titled as Passage to Transylvania) is described as  the first expansion pack for Blood developed by Sunstorm Interactive and released in June 30, 1997.

The first of Blood's two expansion packs is called Cryptic Passage.

The expansion, unlike the Plasma Pak, was created by a third party, Sunstorm Interactive, and it was released by WizardWorks Software; as a result, it doesn't have any bug patches or new features.

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Answer:

\(density = \frac{mass}{volume} \\ \\ density = \frac{20.015}{5.44} \\ \\ { \boxed{ \boxed{density = 3.679 \: g {cm}^{ - 3} }}}\)

In the given situation, the best form of business communication to use would be a formal written communication method. Specifically, a formal letter or email would be appropriate for addressing the payment issue with the customer.

This allows for clear documentation of the communication and provides a professional and formal tone.The written communication should include the following key points:

Polite Reminder: Start the communication by addressing the customer in a polite and respectful manner. Clearly state the purpose of the communication, which is to address the outstanding payment.

Invoice Details: Provide specific details regarding the outstanding invoice, such as the invoice number, date of issuance, and the amount due. Include any relevant payment terms or deadlines mentioned in the original agreement.

Request for Payment: Clearly state the expectation for payment and request immediate action from the customer. Specify acceptable payment methods and provide instructions for making the payment, such as providing bank account details or directing the customer to an online payment portal.

Contact Information: Include contact information for the accounting department, such as a phone number or email address, where the customer can reach out for further clarification or assistance.

Professional Tone: Maintain a professional and courteous tone throughout the communication, avoiding any language that may be confrontational or aggressive. Emphasize the importance of timely payment for maintaining a good business relationship.

By using a formal written communication method, the accounting department can convey the seriousness of the outstanding payment issue while maintaining professionalism. This form of communication also serves as a written record of the interaction, which can be useful for future reference or legal purposes if necessary.

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\(\qquad \qquad\huge \underline{\boxed{\sf Answer}}\)

The balanced chemical equation for given reaction, where Nitrogen and Hydrogen combines to form Ammonia gas is ~

\(\qquad \sf  \dashrightarrow \: N_2(g) + 3H_2 (g) \rightarrow 2NH_3 (g)\)

Therefore, the correct choice is C

The following options are correct for parts of measurement:

A number (magnitude) , An indication of uncertainty,  Aunit , A captive zero and A decimel place.

A quantitative observation or assessment of a physical quantity is referred to as a measurement. While taking a measurement, it's critical to explain the amount of the quantity as well as the degree of uncertainty associated with the measurement.

The following are the components of a measurement:

The value of the quantity being measured is represented by a number (magnitude). Based on the precision of the measurement device, it should be recorded to the appropriate number of significant numbers.

Uncertainty: This is a statement about how much the measurement is predicted to depart from the real value of the quantity. It may be stated in several ways, including absolute error, relative error, and confidence interval.

A unit is the unit of measurement for the quantity being measured. To minimise ambiguity or confusion, it is critical to provide the unit.

At least one notable figure: A measurement should always include at least one significant figure, which is the first non-zero digit in the reported number. The number of significant numbers should represent the measuring instrument's accuracy and the degree of uncertainty in the measurement.

A decimal place: Depending on the magnitude and quality of the measuring device, a measurement may or may not have a decimal place.

A captive zero: A captive zero is a zero that appears between major digits in a measurement. It is not significant in and of itself, however it aids in displaying the decimal point location and the number of significant digits.

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Answer:Melting can create steam, kind of like a nukeular plant exept no nukulear rods

The molality of the solution is 1.4 moles per kilogram (molal).

The molality of the solution is equal to the number of moles of sugar (solute) divided by the number of kilograms of water (solvent). Hence, the molality is determined below:

\(m = \frac{3.5\,mol}{2.5\,kg}\)

\(m = 1.4\,\frac{mol}{kg}\)

The molality of the solution is 1.4 moles per kilogram (molal).

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It is stable to most peptide synthesis conditions, such as acidic or basic conditions, allowing for the synthesis of long peptide chains without unwanted side reactions.

Dansylalanine is synthesized by reacting N-dansyl chloride with the amine group of Boc-L-alanine.

The Boc group on compound 1 in the synthesis of Dansylalanine most likely functions to protect the α-amine group of L-alanine from N-dansylation.

The α-amine group of L-alanine is a nucleophilic center that is highly reactive.

It readily reacts with electrophiles such as the N-dansyl group in N-dansyl chloride, which could have led to the formation of unwanted products if left unprotected.

The presence of the Boc group in Boc-L-alanine shields the α-amine group, making it less reactive towards electrophiles.

Therefore, when N-dansyl chloride is added to Boc-L-alanine, it reacts selectively with the carboxylate group, forming a stable amide bond with the α-amine group protected.

Once the reaction is complete, the Boc group can be removed by treating the product with an acid, unmasking the α-amine group and revealing the desired dansylalanine.

The use of the Boc group as a protecting group in peptide synthesis has become prevalent because of its stability and ease of removal.

It is stable to most peptide synthesis conditions, such as acidic or basic conditions, allowing for the synthesis of long peptide chains without unwanted side reactions.

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Answer:

C, Truck B will have a greater stopping distance. Took the test got it right.

Explanation:

Answer:

the answer is c

Explanation: the truck with less kg means that it will be more likely to stop fast but if you have a high kg it will slide till it stops thus the answer is c

The largest amount of electrons released was around 1.30 × 10¹⁶, and their kinetic energy was around 3.125 × 10¹⁶ eV. The released electrons move at a speed of around 2.41 × 10⁶ m/s.

To calculate the maximum number of electrons emitted, we can use the equation:

Number of electrons = Energy absorbed / Energy required to remove one electron

The energy required to remove one electron is given by the work function, which is 2.40 eV. To convert the energy absorbed from Joules to electron volts (eV), we use the conversion factor: 1 eV = 1.6 × 10⁻¹⁹ J.

First, convert the energy absorbed to eV:

\(Energy absorbed = 5.00 \times 10^{-3} \, \text{J} \times \left( \frac{1 \, \text{eV}}{1.6 \times 10^{-19} \, \text{J}} \right)\)

Next, calculate the maximum number of electrons emitted:

Number of electrons = Energy absorbed / Work function

Now, to determine the kinetic energy and velocity of the electrons emitted, we can use the equations:

Kinetic energy = Energy absorbed - Work function

\(\text{Velocity} = \sqrt{\frac{2 \times \text{Kinetic energy}}{m}}\)

Please note that we will be assuming non-relativistic velocities for this calculation.

Let's perform the calculations:

\(Energy absorbed = $5.00 \times 10^{-3} , \text{J} \times \left(\frac{1 , \text{eV}}{1.6 \times 10^{-19} , \text{J}}\right) = 3.125 \times 10^{16} , \text{eV}$\)

\(Number of electrons = $\frac{3.125 \times 10^{16} , \text{eV}}{2.40 , \text{eV}} \approx 1.30 \times 10^{16}$ electrons\)

Kinetic energy = 3.125 × 10¹⁶ eV - 2.40 eV ≈ 3.125 × 10¹⁶ eV

\(Velocity = \sqrt{\frac{2 \times 3.125 \times 10^{16} \, \text{eV}}{9.11 \times 10^{-31} \, \text{kg}}} \approx 2.41 \times 10^6 \, \text{m/s}\)

Therefore, the maximum number of electrons emitted is approximately 1.30 × 10¹⁶, and their kinetic energy is approximately 3.125 × 10¹⁶ eV. The velocity of the emitted electrons is approximately 2.41 × 10⁶ m/s.

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Based on the balanced equation, if we have 0.08 moles of Iron (Fe), we can conclude that 0.08 moles of Hydrogen (H₂) will be formed as well.

First we need to balance the chemical equation for the reaction involving Iron (Fe) and Hydrogen (H).

The reaction will be between Fe and HCl (hydrochloric acid) to produce hydrogen gas (H₂) and iron chloride (FeCl₂):

Fe + 2HCl → FeCl₂ + H₂

From the balanced equation, we can see that for every 1 mole of Fe reacted, 1 mole of H₂ is formed. Therefore, if we have 0.08 moles of Fe, we can conclude that 0.08 moles of H₂ will be formed as well.

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Assume that every gas in the list will act perfectly. Using the mole fraction of O2 and the specified pressure, the partial pressure of O2 may be computed (P).

What is specified?

The following diagram illustrates the mathematical link between partial pressure of oxygen (P1) and oxygen mole fraction (X1):

P₁=X₁P

By dividing the total number of moles of gases (0.76 + 0.18 + 0.031 + 0.026) by the number of moles of O2 (0.18 mol), it is possible to determine the mole fraction of O2 as follows:

X₁= 0.18 / (0.76+0.18+0.031+0.026)= 0.1805

In this manner, the partial pressure of O2 (P1) is determined:

P1=0.1805x739mmHg, or 133.4mmHg

According to the estimate above, the partial pressure of oxygen is almost equal to 130 mm Hg. As a result, option C is the best one.

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Gibbs free energy: Difference between enthalpy and entropy times temperature. Enthalpy: Internal energy plus pressure times volume for a reaction. Spontaneous: Reaction that occurs without outside help. Entropy: Measure of randomness in a system. Saturated solution: Solution with maximum solute dissolved in solvent.

Difference of the enthalpy (of a system) minus the product of the entropy and absolute temperature: Gibbs free energy.

The Gibbs free energy (G) is defined as the difference between the enthalpy (H) and the product of the entropy (S) and absolute temperature (T). Mathematically, it can be represented as G = H - T*S. The Gibbs free energy is a thermodynamic potential that indicates the maximum reversible work that can be extracted from a system at constant temperature and pressure. A negative value of Gibbs free energy indicates a spontaneous reaction or process.

Sum of the internal energy plus the product of the pressure and volume for a reaction: Enthalpy.

Enthalpy (H) is the sum of the internal energy (U) and the product of the pressure (P) and volume (V) of a system. Mathematically, it can be expressed as H = U + P*V. Enthalpy is often used to measure the heat content of a system during a chemical reaction or a physical change. It describes the overall energy change of a system, including both the internal energy and work done by or on the system.

The condition that a reaction takes place without outside help: Spontaneous.

A spontaneous reaction is a reaction that occurs without the need for any external intervention or assistance. It happens naturally and proceeds in a particular direction under given conditions. Spontaneity is determined by the change in Gibbs free energy (∆G) of the system. If the Gibbs free energy change is negative (∆G < 0), the reaction is spontaneous, indicating that it can occur without any external influence.

The extent of randomness in a system: Entropy.

Entropy (S) is a thermodynamic property that measures the extent of randomness or disorder in a system. It quantifies the distribution of energy and the number of ways in which the energy can be arranged within a system. A system with higher entropy has greater disorder, while a system with lower entropy has more order. Entropy tends to increase in spontaneous processes, reflecting the tendency of systems to move toward a more disordered state.

Solution in which no more solute can be dissolved in the solvent: Saturated solution.

A saturated solution is a solution in which the maximum amount of solute has been dissolved in a given solvent at a particular temperature and pressure. In a saturated solution, the rate of dissolution is in equilibrium with the rate of crystallization, resulting in a dynamic balance. Further addition of solute will not dissolve, as the solution is already saturated. The concentration of the solute in a saturated solution is at its maximum solubility under the given conditions.

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The carbonyls that will give an achiral product after a Grignard reaction with CH3MgBr are aldehydes and ketones.

Aldehydes and ketones do not have a chiral center. These have two identical groups attached to the carbonyl carbon.

For example, formaldehyde (CH2O) and acetone (CH3COCH3) will give achiral products after a Grignard reaction with CH3MgBr.

In contrast, carbonyls that have two different groups attached to the carbonyl carbon, such as propanal (CH3CH2CHO) and 2-butanone (CH3CH2COCH3), will give a mixture of enantiomers after a Grignard reaction with CH3MgBr.

This is because the Grignard reagent can attack at either the top face or bottom face of the carbonyl to give an equal mixture of chiral products.

In summary, carbonyls that do not have a chiral center will give an achiral product after a Grignard reaction with CH3MgBr, while carbonyls that have a chiral center will give a mixture of enantiomers.

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Answer:

10 core electrons and 8 balance electrons

Explanation:

Answer:

A,B,D,E

Explanation:

A, B, D and E-statements are real-world applications of life science.

The concept of science can be defined as a body of systematized knowledge acquired through observation, identification, research and explanation of certain categories of phenomena and facts, and formulated methodically and rationally.

Farmers study plant growth and are able to grow more fruits and vegetables -Farmers protect crops from diseases and adverse climatic conditions. It protects crops from wind and rodents. Farmers have bountiful crops. Farmer's crops are also protected from birds and animals.

Doctors can determine what is wrong with a patient and prescribe the right medicine - A doctor writes a prescription based on a patient's medical history, symptoms, and other factors.

Scientists study weather patterns to provide information about future weather and dentists recommend you brush and floss daily because bacteria cause tooth decay.

Hence, options A, B, D and E are correct.

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The exact density of the water sample with volume 11.3ml and mass 11.349g  is 1.004g/ml.

Density of a solution is defined as the ration of mass of the solution to the volume of the solution. Density is measured in g/cm³ for solids, g/ml for liquids, and g/L for gases.

As per the definition of density ,we can write

Density of solution  = (Mass of the Solution / Volume of the solution)

Mass of the water sample = 11.349g

Volume of water sample = 11.3ml

Density of Water sample = (Mass of water sample/Volume of Water sample)

Density of Water sample = (11.349g / 11.3ml)

Density of Water sample = 1.004g/ml.

The exact density of the water sample with volume 11.3ml and mass 11.349g  is 1.004g/ml.

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The volume of the metal cube that has a mass of 43.7g and a density of 2.76g/cm³ is 15.83cm³.

The volume of a substance can be calculated by dividing the mass of the substance by its density. That is;

Volume = mass ÷ density

According to this question, a metal cube has a mass of 43.7g and a density of 2.76g/cm³. The volume cab be calculated as follows:

Volume = 43.7g ÷ 2.76g/cm³

Volume = 15.83cm³

Therefore, the volume of the metal cube that has a mass of 43.7g and a density of 2.76g/cm³ is 15.83cm³.

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The required mass of water vaporized is 15.5 grams, from a 250 gram sample of water at the boiling point had 35.0 kj

Given: Mass of water (m) = 250 gHeat added (q) = 35.0 kJHeat of vaporization (ΔHvap) = 40.6 kJ/mole

To find:Mass of water vaporized (x) Formula:q = ΔHvap × nx = (q / ΔHvap) × nMass = moles × molar mass

We know that molar mass of water (H2O) = 18 g/molMoles of water vaporized (n) = (35.0 kJ / 40.6 kJ/mol) = 0.861 mol

Therefore,Mass of water vaporized (x) = 0.861 mol × 18 g/mol= 15.5  

Detailed Solution: According to the given statement,250g of water was taken at its boiling point and 35.0 kJ of heat was added to it, we need to find how many grams of water were vaporized. To solve this question, first, we need to know the heat of vaporization for water, which is 40.6 kJ/mole. It means to vaporize 1 mole of water, 40.6 kJ of heat is required.

Mass of water (m) = 250 g Heat added (q) = 35.0 kJHeat of vaporization (ΔHvap) = 40.6 kJ/molen = q / ΔHvapn = (35.0 kJ / 40.6 kJ/mol) = 0.861 molMoles of water vaporized (n) = 0.861 mol

Therefore, Mass of water vaporized (x) = 0.861 mol × 18 g/mol= 15.5 g Hence, the required mass of water vaporized is 15.5 grams.

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The two changes listed above are both caused by heating soo they have something in common. That is option B.

Sanding of a piece of wood is defined as the the process of abrading wood fibers so that they are rendered uniformly rough.

The friction that is caused during sanding process leads to the generation of heat which is equally seen when frying up pancakes.

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Molarity is the concentration of a solution stated as the number of moles of solute per liter of solution, whereas molality is the concentration expressed as the number of moles of solute per kilogram of solvent.

Because molality is unaffected by changes in volume brought on by changes in temperature and pressure, it is employed in examinations of collinear characteristics, which is crucial in figuring out how solutes affect these qualities. Molarity is a measure of the concentration of a solution and is defined as the number of moles of solute present per liter of solution. It is denoted by the symbol "M" and is expressed in units of moles per liter (mol/L). Molarity is used to describe the amount of a solute that is dissolved in a solvent, where the solvent is usually water. This measurement is important in many chemical reactions and is used to calculate the number of reactants and products present in a solution. Molarity can be calculated by dividing the number of moles of solute by the volume of the solution in liters. It is a commonly used unit in chemistry and is one of the fundamental concepts in stoichiometry.

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Young / Grassy

.

.

.

.

.

.

.

.

Answer:

a. young.........................

The electron configuration that belongs to the atom with the lowest first ionization energy is 3s1.

The electron configuration serves to characterize an atom's ground state orbitals, but it may also be used to depict an atom that has charged into a cation and anion through making up for any lost or gained electrons in the orbitals after it.

The quantity of protons inside the atomic nuclei of sodium atoms gives the element an atomic number of 11. In addition, the neutral sodium atom contains 11 electrons. A neutral sodium atom has the electron configuration\(1s^{2} 2s^{2} 2p^{6} 3s^{1}\).

Therefore, the electron configuration that belongs to the atom with the lowest first ionization energy is \(3s^{1}\).

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\(\huge\mathfrak{Solution :- }\)

★ Molecular weight of Calcium carbonate (CaCO)

=> 40+12+(16×3)

=> 100 g

Given,

Weight : 25g

Therefore,

Number of Moles

★Hence, O.25 moles of calcium carbonate used.