Given the values of ΔH∘rxn, ΔS∘rxn, and T below, determine ΔSuniv.ΔH∘rxn= 84 kJ , ΔSrxn= 144 J/K , T= 300 KExpress your answer using two significant figures.ΔSuniv =Predict whether or not the reaction will be spontaneous.

Triacylglycerols are made up of a glycerol backbone and three fatty acids that are ester-linked to the glycerol.

Three fatty acids are esterified to a glycerol molecule to form triacylglycerol. The particular fatty acids esterified to the glycerol moiety and the precise position the fatty acids occupy influence the physical properties of the triacylglycerol.

Triglycerides may have three fatty acid tails that are all the same or all distinct (with different lengths or patterns of double bonds). three fatty acid chains and a glycerol backbone are combined to create a tryacylglycerol molecule, which results in the release of three water molecules.

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Triacylglycerols are made up of a glycerol backbone and three fatty acids that are ester-linked to the glycerol.

Three fatty acids are esterified to a glycerol molecule to form triacylglycerol. The particular fatty acids esterified to the glycerol moiety and the precise position the fatty acids occupy influence the physical properties of the triacylglycerol.

Triglycerides may have three fatty acid tails that are all the same or all distinct (with different lengths or patterns of double bonds). three fatty acid chains and a glycerol backbone are combined to create a tryacylglycerol molecule, which results in the release of three water molecules.

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Answer:

D

Explanation:

Please mark me as brainlyest

Producing hydrogen gas. Hence, option D is correct.

Electrolysis is described by two half-reactions. These half reaction are the oxidation half-reaction and reduction half-reaction.

Electrolysis involves the transfer of electrons. Each half reaction is characterized by the loss or gain of electrons.

The only reason why producing hydrogen gas is not used most of the time is because electrolysis has very low efficiency, most of the energy finishes up being converted to heat and 95% of the hydrogen is produced by steam reforming.

Hence, option D is correct.

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The ranking of compounds according to the strength of their London (dispersion) forces is 1. CCl4 2. BaS2 3. CO

London forces, also known as dispersion forces, are the weakest intermolecular forces and are based on the instantaneous dipole-induced dipole attraction between molecules. The more electrons a molecule has, the stronger the London forces will be. CCl4 has the most electrons, which makes it the strongest of the three compounds.

BaS2 has fewer electrons than CCl4, making it the second strongest of the three compounds. CO has the least amount of electrons and is therefore the weakest of the three compounds.

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Answer:

The best example of direct observation is when the researcher of animal behavior directly observe how animal lives in a reservation.

Answer:

The question is incomplete, the complete question is:

A certain substance X has a normal freezing point of  and a molal freezing point depression constant . A solution is prepared by dissolving some glycine in 950. g of X. This solution freezes at  . Calculate the mass of urea that was dissolved. Round your answer to 2 significant digits.

Answer: The mass of glycine that can be dissolved is

Explanation:

Depression in the freezing point is defined as the difference between the freezing point of the pure solvent and the freezing point of the solution.

The expression for the calculation of depression in freezing point is:

OR

          ......(1)

where,

Freezing point of pure solvent =

Freezing point of solution =

i = Vant Hoff factor = 1 (for non-electrolytes)

= freezing point depression constant =

= Given mass of solute (glycine) = ?

= Molar mass of solute (glycine) = 75.07 g/mol

= Mass of solvent = 950. g

Putting values in equation 1, we get:

Hence, the mass of glycine that can be dissolved is

The statement that the molecular formula mass for sulfur dioxide is 54 grams is false. The correct molecular formula mass for sulfur dioxide is 64 grams.

Sulfur dioxide (SO2) is a chemical compound composed of one sulfur atom (atomic mass of 32 grams) and two oxygen atoms (atomic mass of 16 grams each). To calculate the molecular formula mass of sulfur dioxide, we add the atomic masses of each atom in the compound. In this case, 32 grams (sulfur) + 16 grams (oxygen) + 16 grams (oxygen) equals a total molecular formula mass of 64 grams. Therefore, the molecular formula mass for sulfur dioxide is 64 grams, not 54 grams.

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The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer:

30

Explanation:

I’m pretty sure it is

Answer:

I believe the volume should increase.

Tennessine (Ts)

Element #117

Discovered: April 5, 2010

Answer:

Number of protons is 9

Number of electrons is 9

Number of neutrons is 10

Explanation:

Atomic number refers to the number of protons or electrons in an atom, so the electrons and protons are 9.

Atomic mass is the sum of the number of protons and neutrons.

Therefore, there are 10 neutrons in the atom's nucleus

The heat that is transferred in the reaction can be given as -42.7kJ/mol

We know that the reaction equation can be written as;

HCl + NaOH ---->NaCl +H2O

Then Number of moles of HCl = 75/1000 * 1.25 = 0.09375 moles

Then we know that the total mass of the solutions is;

(75g + 75 g) = 150 g

We would then have the heat that is absorbed by the solution in the calorimeter as;

H = mcdT

H = 150 * 4.18 * (28.32 - 21.45)

H = 4.3 kJ

The heat of the reaction is thus;

ΔH rxn = -(4.3 kJ)/0.09375 moles

= -42.7kJ/mol

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Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.

The correct answer is D. 100 mL × 1g divided by 1mL × 1mol divided by 18.02g × 4.186 kJ/mol = 23.2 kJ

To calculate the energy required to boil 100 mL of water, we need to use the specific heat capacity of water, which is approximately 4.186 J/g·°C. The molar mass of water is 18.02 g/mol.

First, we convert the volume of water from milliliters to grams:

100 mL × 1 g/1 mL = 100 g

Then, we calculate the number of moles of water:

100 g × 1 mol/18.02 g = 5.548 mol

Finally, we multiply the number of moles by the molar heat of vaporization of water, which is approximately 40.65 kJ/mol:

5.548 mol × 4.186 kJ/mol = 23.2 kJ

Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.

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Answer:

Seagrass slow down the water movements and trap the heavy metals and nutrient rich runoff

Mangroves and seagrasses stabilize the sediments, slow down the water movements and trap the heavy metals and nutrient rich runoff, thus improving the water quality for corals and fish communities. They also enhance the biomass of coral reef fishes by providing nursery habitats.

The investigation tested the theory. The experiment gave a precise response to the hypothesis research issue raised in the query.

How would you define hypothesis?

An assumption or concept is given as a hypothesis for the purpose of debating it and testing if it might be true. In the scientific process, the hypothesis is developed before any pertinent research—aside from a basic background review—has been conducted.

What kind of hypothesis would you use?

A straightforward hypothesis just hypothesises the link between two independent and dependent variables. Examples: If you stay up late, you'll be worn out the following day. Your phone will charge more quickly if you turn it off.

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The percent composition of Hg in the compound is approximately 49.94%.

To find the percent composition of Hg in the compound, we need to calculate the molar masses of Hg and the compound and then use the mass of Hg to determine its percentage.

The molar mass of Hg (mercury) is approximately 200.59 g/mol.

First, we need to determine the number of moles of Hg and Br in the compound:

Moles of Hg = mass of Hg / molar mass of Hg

= 60.2 g / 200.59 g/mol

= 0.2997 mol

Moles of Br = mass of Br / molar mass of Br

= 24.0 g / 79.90 g/mol

= 0.3004 mol

Next, we can calculate the percent composition of Hg in the compound:

Percent composition of Hg = (moles of Hg / total moles of the compound) x 100

= (0.2997 mol / (0.2997 mol + 0.3004 mol)) x 100

= 49.94%

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Answer:

Mass = 312 g

Explanation:

Given data:

Number of molecules of H₂ = 9.4 × 10²⁵

Mass in gram = ?

Solution:

First of all we will calculate the number of moles of H₂.

1 mole of H₂ contain 6.022× 10²³ molecules

9.4 × 10²⁵ molecules  × 1 mol / 6.022× 10²³ molecules

1.56× 10² mol

156 moles of H₂:

Mass in gram:

Mass = number of mole × molar mass

Mass = 156 mol × 2 g/mol

Mass = 312 g

As per the balanced reaction given, 4 moles of ammonia reacts with 6 moles of NO. Therefore, the number of moles of NO required to react with 2.45 moles of ammonia is 3.46.

Nitric oxide is a covalent compound formed from the electron sharing between nitrogen and oxygen atom. Nitric oxide is a common gas found in atmosphere.

NO reacts with ammonia gas produces nitrogen gas and water as per the balanced chemical equation given. It is clear that 4 moles of ammonia reacts with 6 moles of NO.

The number of moles of NO required to react with 2.45 moles of ammonia is calculated as follows:

number of moles of NO  = 2.45 × 6 /4 = 3.46.

Therefore, 3.46 moles of NO is required to completely react with 2.45 moles of ammonia.

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The type of reaction which occurs when the oxidation numbers of 2 or more atoms change is an oxidation-reduction{redox} reaction.

A redox (redox) reaction is a type of chemical reaction in which electrons are transferred between two species redox reaction is a chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.

There  are 2 classes of redox reactions  which are:

electron transfer where electrons flow from the reducing agent  to the oxidant

atom transfer atom transfers an atom from one substrate to another

There are different types of redox reactions which are:

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Answer:

\(\frac{3}{2}\)

Explanation:

No of moles : \(\frac{given mass}{atomic mass}\)

so the given mass is 42 gm and atomic mass of silicon is 24 when u solve it u get 3/2

The ability of the blue whale to distinguish between the esophageal and pulmonary passages accounts for the variation in how it obtains molecules between food and air.

Whales are big mammals that live in large quantities of water. They consume their prey whole in order to feed on smaller animals. Water inhalation throughout eating is reduced thanks to the esophagus's separation from the lung. The blowhole mostly on whale's head aids in its ability to breathe in air (oxygen) when it is near the water's surface.

The body's cells are supplied with oxygen and nutrients through the heart, blood, and blood vessels. Blood transports the lungs with carbon dioxide (for exhale) and collects oxygen through the network of arteries, veins, and capillaries. The blood collects food nutrients from the small intestine and transports them to each and every cell in the body.

Therefore,  ability of the blue whale to distinguish between the esophageal and pulmonary passages accounts for the variation in how it obtains molecules between food and air.

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When NH₄OH and CaS are mixed the following reaction occurs:

NH₄OH + CaS ---> Ca(OH)₂ + (NH₄)₂S

Ca(OH)₂ is a poorly soluble base in water. So the formula of the precipitade formed is Ca(OH)₂ and its name is calcium hydroxide.

Bases with cations of the group II of the periodic table are generally poorly soluble in water.

To calculate the energy released in joules/mol when one mole of polonium-214 decays, first determine the mass difference between reactants and products: So the energy released when one mole of polonium-214 decays is 8.78 x 10¹⁴ J/mol.

To calculate the energy released in joules/mol when one mole of polonium-214 decays according to the given equation, we need to first determine the atomic mass difference between the reactants and products.
The atomic mass of 214Po is 213.99519 amu, while the combined atomic masses of 210Pb and 4He are 209.98284 amu + 4.00260 amu = 213.98544 amu.
Thus, the atomic mass difference is 213.99519 amu - 213.98544 amu = 0.00975 amu.
Using the relationship E=mc^2, we can calculate the energy released by the decay of one mole of 214Po as:
E = (0.00975 amu/mol) * (1.66054 x 10^-27 kg/amu) * (2.99792 x 10^8 m/s)^2 = 8.78 x 10^14 J/mol.
Therefore, the correct answer is 8.78 x 10^14 J/mol.

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Answer:

carbon...?

Explanation:

Answer:

Carbon

Explanation:

Carbon makes up most of the building blocks of life.  Hope that is right. Good luck

Mass Fraction: The ratio of one amount to another by mass is referred to as a compound's mass fraction. A unit less variation exists in mass fraction.

molar mass C2F3CL3= 84g/mol

moles C2F3CL3 =24 kg x 1000g/kg  x 1 mol/84g = 286 moles

moles cl= 286 moles C2F3CL3 x 3 mol cl/ mol = 858 moles cl

kg cl= 858 moles cl x 35 g cl /mol x 1kg/1000g =30 kg cl

35 kg of chlorine are in 24 kg of each of the following chlorofluorocarbons(CFCs)

Chemicals with carbon, chlorine, and fluorine atoms are known as chlorofluorocarbons (CFCs), and they are neither poisonous nor combustible. They are employed as solvents, refrigerants, blowing agents for foams and packaging materials, and in the production of aerosol sprays. They are also commonly known by the DuPont brand name Freon.

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The similarity between law of conservation of mass and law of conservation of energy is that no new substance is created in both rather they are conserved.

Law of conservation of mass states that the mass can neither be created nor destroyed but is transformed from one form to another.

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another.

When a toy car is rolled down a ramp the gravitational potential energy at the given height will be converted into kinetic energy of the toy car.

Thus, the similarity between law of conservation of mass and law of conservation of energy is that no new substance is created in both rather they are conserved.

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The arrows labeled ε have no input labels on them.

Given the Theorem 1.47, which states that the class of regular languages is closed under the concatenation operation, let's use the construction in the proof of Theorem 1.47 to give the state diagrams of NFAs recognizing the concatenation of the languages described in

Exercises 1.6g and 1.6i.

We have the following regular expressions: g: (00 + 11)*i: 1* + 0*11(00 + 11)* is the language described in (g) and 1* + 0*11 is the language described in

(i). The concatenation of (g) and (i) is (00 + 11)*(1* + 0*11). Now, we can construct an NFA for the language (00 + 11)*(1* + 0*11) as follows:

State diagram for the concatenation of (g) and (i): The arrows labeled ε have no input labels on them. The NFA reads a string by following a path of arrows labeled with the input symbols of the string.

Exercises 1.6b and 1.6m:

We have the following regular expressions: b: 0* + 1* m: (10 + 01)*0(0* + 1*) is the language described in (b), and (10 + 01)*0 is the language described in (m).

The concatenation of (b) and (m) is (0* + 1*)(10 + 01)*0. Now, we can construct an NFA for the language (0* + 1*)(10 + 01)*0 as follows:

State diagram for the concatenation of (b) and (m): The arrows labeled ε have no input labels on them. The NFA reads a string by following a path of arrows labeled with the input symbols of the string.

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The triple point can be seen from the graph that has been attached here.

The triple point is a special combination of temperature and pressure where the equilibrium of a substance's three phases—solid, liquid, and gas—occurs. The transition between phases happens with no discernible net change in the substance because the solid, liquid, and gas phases are in perfect equilibrium at the triple point.

A crucial reference point in thermodynamics, the triple point is frequently used to specify temperature scales and calibrate thermometers. Each substance has a specified value for temperature and pressure.

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