A beaker with 150 ml of water is placed on a hot plate. The beginning temperature is 22 oC. After 5 minutes the temperature is 87 oC. What is the amount of thermal (heat)energy absorbed by the water. 150 ml = 150 grams specific heat of water = 4.184 J/goC. show work plzzz​

The feedstock used in the production of biodiesel is also different from that of ethanol, with biodiesel feedstocks being derived from indigenous sources such as plant oils or animal fats.

Biochemical steps in the production of ethanol from a first generation feedstock:

Ethanol is a biofuel that is made by the fermentation of glucose (C6H12O6) from sugar cane, wheat, or maize feedstocks. These feedstocks are first pretreated before the conversion process. The process of producing ethanol can be divided into five main steps as outlined below:

1. Pretreatment: In the first step, the feedstock undergoes pretreatment that helps to remove lignin, hemicellulose, and other impurities that are present in the plant cell wall. This step exposes the cellulose component to the enzymatic hydrolysis process.

2. Enzymatic hydrolysis: In this step, the cellulose component is converted into glucose using enzymes that break down the cellulose molecule into smaller glucose molecules.

3. Fermentation: After hydrolysis, the glucose is converted to ethanol by fermentation. The fermentation process is carried out by yeast or bacteria, which converts the glucose to ethanol through the process of anaerobic respiration.

4. Distillation: Once the ethanol is produced, it is then distilled to separate the ethanol from the water and other impurities.

5. Dehydration: In this final step, the water is removed from the ethanol using a dehydration process to obtain a pure form of ethanol. Compare the process (without giving details) to the production of biodiesel from indigenous feedstock.

Biodiesel is a biofuel that is made from plant oils or animal fats through a process known as transesterification. In the transesterification process, the triglycerides in the feedstock are reacted with an alcohol, usually methanol, to produce fatty acid methyl esters (FAMEs) and glycerol.

The FAMEs are then separated from the glycerol by distillation to produce biodiesel. The production of biodiesel is quite different from that of ethanol as it involves the use of transesterification to produce the biofuel.

The feedstock used in the production of biodiesel is also different from that of ethanol, with biodiesel feedstocks being derived from indigenous sources such as plant oils or animal fats.

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For a 2 px orbital of a hydrogen atom, the wave function has cylindrical symmetry about the x- axis. Option A is the correct answer.

The 2 px orbital is one of the three dum bbell -shaped p orbitals in the hydrogen atom. It has a cylindrical symmetry, meaning that the electron density distribution is symmetric around the x- axis. This indicates that the probability of finding the electron is the same at equal distances from the x- axis. In contrast, the y- axis and z- axis do not exhibit this cylindrical symmetry for the 2 px orbital. Therefore, the correct answer is the x- axis.

Option A is the correct answer.

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Answer:

Hi there

Thermal Energy and Chemical Reactions

The device controlled the activation as shown by the water holding room temperature for 15 seconds until activation by crushing the pills. The temperature rose 30° over two minutes,showing a measurable exothermic reaction from the Calcium Chloride dissolving in the water.

Pour 5mL water in a quart bag

Place Thermometer in the bag to make contact

Fill two gelatin 000 capsules with 1 gram of Calcium Chloride

Place capsules into the bag

Wait 15 seconds to crush the capsules while they are submerged in the water

-Temperature

0 seconds 75 degrees

15 seconds - Activation 75 degrees

30 seconds 85 degrees

60 seconds 95 degrees

90 seconds 104 degrees

120 seconds 105 degrees

Conclusion: During a reaction, thermal energy from the environment is converted into chemical energy stored in the products.

Brainliest plz

Answer:

The answer is C, Glucose is a compound, because it is made of more than one element.

Explanation:

Complete Question is ;

The chemical formula for glucose, a type of sugar, is C₆H₁₂0₆. Which statement is true about glucose?

1) Glucose is a compound because it's made from more than 1 element

2) Glucose is an element because it's made up from more than one kind of atom.

3) Glucose is an element because it can be separated.

4) glucose is a compound because is made of protons, neutrons and electrons

Solution ;

The statement which is true about glucose is (1) Glucose is a compound because it's made from more than 1 element. Hence the correct option is (1)

Aan element made entirely of one species of atoms, or an atom which has a specific number of protons in its nucleus.

Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.

Three substances make up glucose: carbon, hydrogen, and oxygen. They are set at a fixed ratio of 1:2:1.

Covalent bonds, in which two atoms share bonding valence electrons in one or more bonds, are used to bind these atoms together.

Therefore, The statement which is true about glucose is (1) Glucose is a compound because it's made from more than 1 element. Hence the correct option is (1)

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The correct option is (c). The second chemist must have added a catalyst for the reaction, thus providing a different reaction pathway for the reactant particles to react with an activation energy that was lower than that of the uncatalyzed reaction in the first chemist's experiments.

A catalyst acts as an intermediate between two reactants, increasing the reaction rate and allowing the reaction to occur at lower temperatures and pressures. By lowering the activation energy needed for the reaction, the reaction rate is increased.

Thus, the second chemist adding a catalyst explains why the reaction rate was greater than what the first chemist observed even when the concentrations of the reactants and the temperature in the laboratory were the same.

Therefore, the correct answer is (c).

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Answer:

i think the answer is c because it says that is all they care

Answer: (P2/P1)=(T2/T1)

(P2/1200.0kPa)=(387/283)

P2=(387K/283K) * (1200kPa)

P2= 1641kPa

Explanation:

An Oxygen Tank has a pressure of 1200 Kpa at 283K and when temp. is increased to 378 K then pressure will be 1,602.82 kpa.

From the ideal gas equation it is clear that pressure of gas is directly proportional to the temperature, and for this question required equation will be:

P₁/T₁ = P₂/T₂, where

P₁ = initial pressure of oxygen tank = 1200 kpa

T₁ = initial temperature of oxygen tank = 283 K

P₂ = final pressure of oxygen tank = ?

T₂ = final temperature of oxygen tank = 378 K

On putting values, we get

P₂ = (1200)(378) / (283) = 1,602.82 kpa

Hence resultant pressure of the oxygen tank is  1,602.82 kpa.

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Human activity can have a significant impact on the balance of acids and bases in the environment are Acid rain, Ocean acidification, and Agricultural practices.

Acid rain is caused by the release of sulfur dioxide (SO2) and nitrogen oxides (NOx) into the atmosphere from the burning of fossil fuels. These gases react with water vapor in the atmosphere to form acids, which can then fall to the earth as rain, snow, or fog. Acid rain can have a detrimental effect on the environment, including the acidification of lakes and streams, the damaging of forests and crops, and the erosion of buildings and monuments.

The burning of fossil fuels also releases carbon dioxide (CO2) into the atmosphere, which can be absorbed by the oceans. This can lead to a decrease in the pH of the oceans, which can have a negative impact on marine life, including the bleaching of coral reefs and the dissolution of the shells of shellfish.

The use of fertilizers in agriculture can lead to the release of nitrous oxide (N2O) into the atmosphere, which can contribute to the formation of acid rain. Additionally, the use of pesticides and herbicides can lead to the release of chemicals into the environment, which can also affect the balance of acids and bases.

Overall, human activity can have a significant impact on the balance of acids and bases in the environment, and it is important to take steps to reduce our impact on the environment in order to maintain a healthy balance of acids and bases.

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Answer:

Explanation:

The Hawaiian Islands were literally created from lots of volcanoes—they're a trail of volcanic eruptions. In the case of the Hawaiian Islands, the Pacific Plate is continually moving to the northwest over the Hawaiian hot spot. This movement caused the Hawaiian chain of islands to form.

An elastic collision is one in which the system does not experience a net loss of kinetic energy as a result of the collision.

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As a result, 0.231liters of the 0.150M potassium iodide solution would be required to thoroughly react with the supplied lead(II) nitrate solution.

When a solution of potassium iodide is introduced to a solution of lead nitrate in a test tube, a yellowish solid precipitates.

Lead iodide is a whitish solid. Along with lead iodide, potassium nitrate is generated. This is a reaction with two displacements.

The reaction between lead nitrate [Pb(NO3)2] and potassium iodide (Kl) results in the creation of potassium nitrate (KNO3) and a yellow precipitate of lead iodide (PbI2).

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Answer:

2

Explanation:

Pb(NO3)2 + 2NaI 2NaNO3 + PbI2

To see the coefficients of NaI in the given reaction we need to balance the reaction first. The coefficient for Nal once the equation is balanced is 2. the correct option is option B.

Balanced equation is the one where the number of atoms of each species is same on reactant and product side. In balanced equation mass can neither be created nor be destroyed.

The unbalanced equation is

\(\rm Pb(NO_{3})_{2}+ Nal\rightarrow NaNO_{3} + PbI_{2}\)

The atoms of Pb on reactant and product side is 1 so Pb is balanced.

The atoms of N is 2 on reactant and 1 on product side so balance it as

\(\rm Pb(NO_{3})_{2}+ Nal\rightarrow 2 NaNO_{3} + PbI_{2}\)

The atoms of O is 6 on reactant and 6 on product side so it is balanced

The atoms of I is 1 on reactant and 2 on product side so balance it as

\(\rm Pb(NO_{3})_{2}+2 Nal\rightarrow 2NaNO_{3} + PbI_{2}\)

The atoms of Na on reactant and product side is 2 so Na is balanced.

Now all the elements are balanced

Therefore, the coefficient for Nal once the equation is balanced is 2. the correct option is option B.

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The pressure of 0.0158 mole of methane in a 0.275 L flask at 27 °C is approximately 4.42 atm.

To calculate the pressure of the methane in the flask, we can use the ideal gas law equation:

PV = nRT

Where:

P = Pressure (in atm)

V = Volume (in liters)

n = Number of moles

R = Ideal gas constant (0.0821 L·atm/(mol·K))

T = Temperature (in Kelvin)

First, let's convert the temperature from Celsius to Kelvin:

T(K) = T(°C) + 273.15

T(K) = 27 + 273.15

T(K) = 300.15 K

Now we can substitute the given values into the ideal gas law equation:

P * 0.275 = 0.0158 * 0.0821 * 300.15

Solving for P:

P = (0.0158 * 0.0821 * 300.15) / 0.275

P ≈ 4.42 atm

Therefore, the pressure of 0.0158 mole of methane in a 0.275 L flask at 27 °C is approximately 4.42 atm.

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Answer:

3.33 tanques de O₂

Explanation:

Basados en la reacción:

2C₂H₂(g) + 5O₂(g) → 4CO₂(g) + 2H₂O(g)

2 moles de acetileno reaccionan con 5 moles de oxígeno produciendo 4 moles de dióxido de carbono y 2 moles de agua

La ley de Avogadro dice que el volumen de un gas bajo temperatura y presión constantes es proporcional a las moles de este gas. Así, como 2 moles de acetileno reaccionan con 5 moles de oxígeno, los litros de O₂ necesarios para quemar 9340L de acetileno son:

9340 L C₂H₂ × (5 moles O₂ / 2 moles C₂H₂) = 23350L de O₂

Si un tanque contiene 7x10³ L de O₂ serán necesarios:

23350L O₂ ₓ (1 tanque / 7x10³L) = 3.33 tanques de O₂

In the polysaccharide cellulose, large numbers of monosaccharides are linked together through glycosidic linkages.

TPolysaccharides, which are the most ubiquitous carbohydrates in nature, serve a number of functions, including energy storage and incorporation into plant cell walls.

Tens to thousands of monosaccharides are joined together via glycosidic linkages to form large polymers known as polysaccharides. The three most frequent polysaccharides are starch, glycogen, and cellulose. They are collectively referred to as homopolymers because, after complete hydrolysis, each of these three exclusively yields one type of monosaccharide (glucose).

Heteropolymers may also comprise sugar acids, amino sugars, or non-carbohydrate substances in addition to monosaccharides. Polysaccharides, a class of non-reducing carbohydrates, are not sweet and do not change. 

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The element in the fifth period of the periodic table with 6 valence electrons is the chemical element named Oxygen (O).

It is a chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.

Oxygen is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. It is one of the least reactive chemical elements, and is solid, liquid, or gas at room temperature. Oxygen is essential to human life, accounting for about 21 percent of the air we breathe. So therefore oxygen is the element in the fifth period of the periodic table with 6 valence electrons.

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Answer:

The element in the fifth period of the periodic table with 6 valence electrons is the chemical element named Oxygen (O).

Explanation:

Answer:

phosphorus cycle

Explanation:

the phosphorus cycle because 302 equals to it

Boiling temperature of the mixture of liquids when pt= 660 kPa is 74.08°C.

Given,Composition of mixture of liquids is, x1=0.4, x2=0.1, x3=0.5Saturation pressures in kPa are, psat1=exp(14.3-2945/224+T)), psat2=exp(14.2-2943/209+T)), psat3=exp(17-3200/212+T))Using these values, we can calculate pt as,pt= x1 * psat1 + x2 * psat2 + x3 * psat3Put the given values of x and psat in the above equation,pt= 0.4 * exp(14.3 - 2945 / 224 + T) + 0.1 * exp(14.2 - 2943 / 209 + T) + 0.5 * exp(17 - 3200 / 212 + T)And, pt = 660 kPaNow, we need to calculate boiling temperature at pt = 660 kPa by using the zero function techniques such as graph, newton, bisection, and secant.

Here, we will use the Bisection method to calculate boiling temperature at pt = 660 kPa.Step-by-step solution:Given values are,x1 = 0.4, x2 = 0.1, x3 = 0.5psat1 = exp(14.3 - 2945/224 + T) = exp(0.0638T - 1.0747)psat2 = exp(14.2 - 2943/209 + T) = exp(0.068T - 1.0806)psat3 = exp(17 - 3200/212 + T) = exp(0.0755T - 1.0189)pt = x1 * psat1 + x2 * psat2 + x3 * psat3pt = 660 kPaWe need to calculate boiling temperature for pt = 660 kPaUsing the Bisection method,Let T = boiling temperatureThen, f(T) = x1 * psat1 + x2 * psat2 + x3 * psat3 - pt= 0.4 * exp(14.3 - 2945/224 + T) + 0.1 * exp(14.2 - 2943/209 + T) + 0.5 * exp(17 - 3200/212 + T) - 660We know that f(T) = 0 when pt = x1 * psat1 + x2 * psat2 + x3 * psat3 at the boiling temperature.

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In order to be heavier than water and elegantly settle to the bottom of the buffer-submerged well when introduced to a gel, loading buffers also contain glycerol.

A polysaccharide version of jelly is called agarose. Agarose is heated in the proper buffer to form gels. Small pores in the gel function as a filter medium. Agarose can also react with some molecules in a variety of ways that can impact how mobile they are.

Due to the high hydrogel of agarose, large DNA fragments can be separated using low % gels. The size of the pores produced by the strands of policy also provides in the gel matrix governs molecular sieving. In general, pore size decreases with increasing agarose concentration.

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Answer:

80C

Explanation:

As a substance gets hotter, or as a substance gets closer to the state of gas, the particles in the substance move faster, become more spread out and have more energy. This is why Gas has the most energy while solids have the least. Therefore, the hotter a substance is the more energy it has.

A glass of water at 80°C will have the most amount of energy

Explanation:

So, from this, we can conclude that glass with water at a higher temperature that is 80°C will have a  higher amount of energy than a glass of water at 20°C.

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Answer:

B.) The difference in electronegativity of the two elements is less than 1.7.

Explanation:

A difference of less than 2 between atoms leads to covalent bond formation. Electronegativity is the ability of an atom to draw bonding electrons when it is bonded.

We know that in covalent bonding, atoms "share" elections. We also know that in ionic bonding, atoms "take" electrons. If the electronegativity was too great then atoms would no longer share electrons, one would just draw the electron to it. The ideal values to covalently bond, in this case, would be below two.

Answer:

0.987 g/ml

Explanation:

The formula for density is mass/ volume.

Substituting our values in we get density = 3.75/ 3.8 = 0.9868g/ml.

Hope this helps! Let me know if you have any questions :)

Answer:

i would assume i mean who has cold farts

Explanation:

Yes, farting is an example of an exothermic reaction.

A reaction that is chemical in nature and is characterized by the release of energy in the form of heat or light is called an exothermic reaction.

Farting is a normal part of digestion that reflects the activity of the bacteria in your gut.

Yes, farting is an example of an exothermic reaction.

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Answer:

2

Explanation:

Elements in Group 2 have 2 valence electrons.

The number of valence electrons in Group 2 elements is 2. The correct answer is option D.

Valence electrons are the electrons present in the outermost energy level of an atom, and they play a critical role in determining the chemical properties of an element.

Group 2 elements are also known as alkaline earth metals, and include beryllium, magnesium, calcium, strontium, barium, and radium. These elements have two valence electrons in their outermost energy level, which makes them highly reactive and likely to form cations with a charge of +2.

Therefore, option D. 2 is the number of valence electrons in Group 2 elements.

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The ideal pressure exerted by the helium gas is 426580 Pa.

We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation

P . V = n . R . T

where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

From the question above, we know that the parameters of Helium gas are

T = 77 K

m = 2 g

V = 1.5 L = 1.5 x 10¯³ m³

Mr He = 2

By substituting the given parameters, we can calculate the pressure

P . V = n . R . T

P . 1.5 x 10¯³ = 2 / 2 . 8.31 . 77

P = 426580 Pa

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Answer:

Copper (IV) Phosphate.

Explanation:

Copper (IV) Phosphate is an inorganic compound consisting of copper in its +4 oxidation state and phosphate anions. It has the chemical formula CuPO₄ and is commonly used as a component in catalysts, pigments, and ceramic materials. The "IV" in its name refers to the oxidation state of copper, which is +4.

Explanation:

Copper does not react with HCl to give H2 gas.

The value of the wavelength of a certain type of light in meters is 3.51 x 10^-7 meters.

To convert from nanometers (nm) to meters (m), you can use the following conversion factor:

1 nm = 10^-9 m

So, to convert 351 nm to meters, you can multiply by the conversion factor:

351 nm x (10^-9 m / 1 nm) = 3.51 x 10^-7 m

Therefore, the value of the wavelength of this certain type of light in meters is 3.51 x 10^-7 meters.

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