What are chemical changes that take place in the creation of a s’more

Acetic acid has a 4.76 pH value. In order to create a buffer with a pH of 5.20, it is necessary to have a ratio of 2.75 of acetic acid and acetate ions.

The amount of a substance's solute in a specific amount of solution is how concentrated it is. Molarity, or the number of moles of solute in one liter of solution, is a common unit of measurement for concentrations.

Since the Great Salt Lake has a high concentration of salt, there aren't many fish there. A high concentration of a material in a solution simply implies that there is a lot of it there in relation to the volume. It signifies you pay attention properly to state that you have high focus skills.

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Answer:

What is the question?

Explanation:

Answer:

C.  Studying yeast cells to learn how they divide

Explanation:

For this problem, we want to look at a topic that is a simple piece of scientific research.  Let's review each of the options provided to make this determination.

A.  Developing artificial drugs to treat cancer

This option is clearly not simple as it requires advanced knowledge of how drugs affect the body, how to build the drugs, the effects of cancer, how cancer works, etc.

B.  Researching materials to make stronger cars

This option is clearly not simple as it requires knowledge of the strength of materials, what is necessary for a car, why a car may need stronger materials, the trade-offs given by making a stronger material for a car, etc.

C.  Studying yeast cells to learn how they divide

This option is clearly a simple as you simply need to understand what cells are, what yeast cells look like, and the process by which cells duplicate.

D.  Studying rain forest plants to find medical drugs

This option is clearly not simple as it requires knowledge of the different ecosystems of a rain forest, advanced botanical knowledge used to identify different types of plants, knowledge regarding specific ailments that could be treated by drugs, and potential uses of plants to make drugs, etc.

Given this break down of each answer choice, we should choose C as our basic scientific research since it is the least involved.  Notice how all the advanced options use science to lead to the creation or discovery of something new, while the basic option simply yields an observation of knowledge.

Cheers.

The heat released by 100g of the compound is  2.8 x10^3 kJ .

We know that the process of combustion is the process that enables a substance to be burnt in air. Heat and light can be produced in the process of the combustion.

Number of moles of the Methylhydrazine =  mass/ molar mas = 100.0g/46 g/mol = 2.17 moles

If from the balanced reaction equation;

1 moles of Methylhydrazine produces 1.30x10^3 kJ

Then 2.17 moles of Methylhydrazine produces  2.17 moles *  1.30x10^3 kJ/1 mole

= 2.8 x10^3 kJ of heat.

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Answer:

c

Explanation:

Answer:

No.Kerosene oil and water do not mix with each other and form two separate layers.

Answer:

No

Explanation:

They cannot be mixed together they will form upper and lower layer

Answer:

C) only potential energy.

Answer:

Thermal energy comes from heat sources that provide energy from it's temp.

Explanation:

Produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy. 6 min, 47 sec Heat Energy.

(If this doesn't help let me know in the comments, I'll try to explain better :> )

The coefficients for the above given reaction,

hydrochloric acid (aq) + iron(iii) oxide → (s) water (l) + iron(iii) chloride are 6) 1) 3) 2).

Balanced chemical equations are described as the chemical equations that have the same number and type of each atom on both sides of the equation. The coefficients of a balanced chemical equation must be the simplest whole number ratio. Mass of the chemicals is always conserved in chemical reactions.

Word reaction for the above chemical reaction is given as,

hydrochloric acid (aq) + iron(iii) oxide → (s) water (l) + iron(iii) chloride

Balanced chemical for the reaction is given as,

6 HCl + Fe₂O₃ → 3H₂O + 2FeCl₃

Hence, the coefficients are 6) 1) 3) 2).

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When two oppositely charged particles are closer together, they have a stronger attraction toward one another than if they are farther apart.

The electrostatic force, which is the force of attraction or repulsion between two charged particles, is the cause of this attraction. The magnitude of the electrostatic force between two charged particles is inversely proportional to the square of the distance between them and directly proportional to the product of their charges.

The inverse square law states that as the distance between two charged particles moves closer together, the electrostatic force between them grows as a result of a smaller denominator. Therefore, the stronger the attraction between two oppositely charged particles will be the closer they are.

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This is due to the fact that a substance's chemical qualities, such as its molecular form, polarity, and functional groups, govern how it behaves and interacts with other substances.

By illustrating the spatial arrangement of atoms and chemical bonds within the molecule, chemical structure establishes the molecular geometry of a compound. In doing so, chemists are given a crucial visual depiction of a chemical formula.

In a chemical reaction, reactants come into contact with one another, atoms in the reactants break their connections with one another, and then the atoms reorganise and form new bonds to create the products.

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In this equation, two molecules of aluminum hydroxide react with three molecules of sulfuric acid to produce one molecule of aluminum sulfate and six molecules of water.

What is Molecules?

A molecule is a group of two or more atoms that are chemically bonded together. Atoms can combine to form molecules by sharing electrons between them, forming a covalent bond. Molecules can also be formed by the attraction between oppositely charged ions, known as ionic bonding.

Molecules can be made up of atoms of the same element or atoms of different elements. For example, oxygen gas (O2) is a molecule made up of two oxygen atoms, while water (H2O) is a molecule made up of two hydrogen atoms and one oxygen atom.

The balanced chemical equation for the reaction between aluminum hydroxide and sulfuric acid is:

2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O

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The warmest climate zones, the Tropic Zones are close to the Equator and receive a lot of direct sunlight.

The tropics are parts of Earth that are situated essentially in the centre of the planet. the tropics that, in terms of latitude, are situated between the Tropics of Cancer and Capricorn. The equator and portions of North America are included in the tropics.

As an illustration, hot places are typically found closer to the equator. Because the Sun shines most directly overhead at the equator, the climate is hotter there. Moreover, the North and South Poles are chilly because they receive the least direct sunlight and heat.

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At pOH value  of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

In this question we will apply the formula

      pH +pOH = 14 . . . . . . . . . . . . .(1)

where pH = concentration of [\(H^{+}\) ] ion

pOH = concentration of [\(OH^{-}\) ] ion

As per the question

pOH =6.0

Putting the value of pOH in equation (1) we get the value of pH

              pH + 6.0 =14

             pH = 14 -6.0

             pH  = 8.0

 The value of pH if the pOH value is 6.0 is 8.0

To find the concentration of \(H^{+}\) ion we will use the following formula

This is calculated by the formula

                                 [\(H^{+}\)} = \(10^{-pH}\)

where we will write the values of pH

Hence the concentration of [\(H^{+}\)} ion is \(10^{-8}\)

Therefore at  pOH of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

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The complete question is -

What is the pH value and concentration of [\(H^{+}\) ] ion of the following if the pOH value of the solution is 6.0 ?

Answer: 6.23

Explanation:

1) solve for pH  

pH=-log (H3O+) = - log 1.7 X 10^-8 =7.77

2) now do 14-pH  = 14 -7.77=6.23

According to mole concept and Avogadro's number , there are 300.5 moles in 1.81×10²⁶ molecules of water.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

As 1 mole= 6.023×10²³ molecules ,therefore 1.81×10²⁶ molecules= 1.81×10²⁶ /6.023×10²³=300.5 moles.

Thus, there are 300.5 moles in 1.81×10²⁶ molecules of water.

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We must find the moles => n

First, we assume ideal gas conditions, so we can use the ideal gas law:

p = pressure in atm

V = volume in L

n = moles = needs to be found

T = temperature in K, to get Kelvin we must do this procedure:

T (°C) + 273 = T (K)

68 °C + 273 = 341 K

R = gas constant = 0.082 atm x L / mol x K, we take this value of R because of the units we already have.

Procedure:

Clear "n" from (1)

Answer: n = 6.6 moles

Answer:

Yes a soap is a salt

Explanation:

The process of soap production is called saponification. Saponification is the hydrolysis of fats and oils with a caustic alkali such as NaOH or KOH to yield the corresponding sodium or potassium salt of the fatty acid and propane 1,2,3-triol.

Recall that organic salts are compounds of the sort RCOO^-M^+ (such as RCOO^-Na^+). A soap is of the same RCOO^-Na^+ (or K^+) structure indicating that it is a salt where R is the alkyl chain of the fatty acid.

Answer:

DC stands for direct current. AC stands for alternating current. DC voltage values do not change(+,-). AC does with respect to frequency and time. AC voltage and current have a peak, rms(effective, DC equivalent), peak to peak, and average. AC voltage, current, capacitors, and inductors are expressed with imaginary numbers or angles. All relationships like ohm's law, KVL, KCL, etc. applies to both.

The society with the least negative effects on the environment is probably the one with a small population, traditional farming methods, no access to contemporary technology, and self-sufficient food production.

This is due to the fact that their way of living is less dependent on modern infrastructure and technology, both of which have a negative impact on the environment. Additionally, their agricultural methods are probably more environmentally friendly and sustainable.

The environmental effects of the other societies on the list would all be greater. Because of the use of fossil fuels and the production of products that require a lot of resources, a big, industrialized society with high levels of consumption would have a significant carbon footprint.

It would still take a lot of resources to maintain its infrastructure and create products in a less populous, highly industrialized society with moderate consumption levels, which would have a negative effect on the environment.

Given that the size of the population alone would necessitate significant resource consumption and infrastructure development, a big population with moderate industrialization and consumption levels would also have a big effect on the environment.

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The oxidation level in the first set from row 1 to row 5 is 4 , 1 ,1,2,1 and in the second set is 3,1,1,1,2. the compounds which  have the same oxidation level as the compound in row 1 in first set is 3 and in second set is none.

Hence, oxidation level of row 1 of first set is 4 with two electronegative O and one electronegative Nalong with an unsaturation. Also row 3 of the first set has oxidation level 4(two unsaturation and two 0) Similarly, oxidation level of row 1 of second set is 3. No other compounds in second set has oxidation level 3, hence first set - 3 and second set - none. The oxidation level of a compound is determined by the number of electronegative elements and unsaturations in the compound. The more number of electronegative elements there are, more is the oxidation level as we know that oxidation is the process of removal of electron or addition of electronegative elements like O and N. Also, the reverse reduction is defined as H being added to the compound. For example, in acetic acid, there are two O atoms and a C=O unsaturation. Hence, the oxidation level is 3. Similarly, in ethene, there is only one unsaturation. Hence, oxidation number is 1.

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the complete question is :

Which of the following compounds have the same oxidation level as the compound in row 1? (Enter your answer in numerical order as the row number(s) separated by commas, i.e. 2, 3, 5. If none of the compounds have the same oxidation level, write 'none'.)

this question is in reference to the formation and naming of ionic compounds. Specifically, they want you to give examples of three ionic compounds with a metal to nonmetal ratio of 2 to 1. That means we need to have two metal atoms to metal ions, which are typically cat ions for every one non metal atom or an ion. In order for this to occur, we need to have the metal with half the charge of the nonmetal or the non metal with double the charge of the metal. So an example might be something like sodium sulfide. Sodium has one valence electron. It can give up sulfur needs to valence electrons in order to achieve an octet. So we need to. Sodium seems to give up one electron each to total so that sulfide can achieve an octet. Another one might be potassium oxide. Similar scenario. We've got potassium giving up one valence electron oxygen requiring too. So we need to potassium to supply the to valence electrons that oxygen needs to achieve an octet and lithium. Also in Group one A and alkali metal wants to give up just one valence electron to achieve an octet well to achieve, I guess a duet to be more like helium, and so it gives up one. If we have two of them, then we can provide the to valence electrons that sulfur needs. So this is sodium sulfide, potassium oxide and lithium sulfide. Remember when we name Ionic compounds? We named the Cat Ion with the name of the element and the anti on with the name of the Element, but with the ending oven of ID, a suffix of ID because each one of the cat ions donated their valence electrons to the anti on so the an ion could achieve an octet. Then all of the's will have an octet of valence electrons. Sulfur had six sodium had one. There were two of them, so we have a total of eight.

The metals that can form only one type of ion are Li, Al, Ca, Ba, Rb, W,Na, Mg and  Sr. They are called alkali metals.

Cobalt, Co is stable in both +2 and +3 oxidation state. So it can variable.

Lithium, Li only have +1 charge. So it is invariable from one compound to other.

Lead, Pb is variable as it has +2, +4 charge in which it is stable.

Pd has +2, +4 charge in which it is stable. So, It is variable.

Copper, Cu has +1, +2 charge. It is also variable. Potassium, K has only +1 charge. It is invariable. Aluminum, Al has only +3 charge. It is invariable.

Cesium, Cs is only stable in +1 charge. It is invariable. Molybdenum, Mo is stable in +4 and +6. It is variable. Calcium, Ca and Barium Ba are stable in +2 charge. It is invariable.

Rubidium, Rb is stable in +1 charge. It is invariable. Tungsten, W is stable in +6 charge. It is invariable. Iron, Fe is stable in +2, +3 charge. It is variable. Sodium, Na is stable in +1 charge. It is invariable. Mg and Sr are stable in +2 charge. It is invariable. Vanadium, V has +2, +3, +4, +5 charges. So, It is variable.

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The pressure exerted by a column of mercury that is about 760 mm high corresponds to approximately 0.987 atm.

To calculate the pressure exerted by a column of mercury, we can use the formula:

Pressure = density * gravity * height

Given:

Density of mercury = 13.6 g/cm³

Height of the mercury column = 760 mm = 76 cm

Acceleration due to gravity = 9.8 m/s²

First, we need to convert the height of the mercury column from centimeters to meters:

Height = 76 cm * (1 m / 100 cm) = 0.76 m

Now, we can calculate the pressure:

Pressure = 13.6 g/cm³ * 9.8 m/s² * 0.76 m

To ensure consistent units, we need to convert the density from grams per cubic centimeter (g/cm³) to kilograms per cubic meter (kg/m³):

Density = 13.6 g/cm³ * (1 kg / 1000 g) * (1 cm³ / (1e-6 m³))

Density = 13600 kg/m³

Plugging in the values into the pressure formula:

Pressure = 13600 kg/m³ * 9.8 m/s² * 0.76 m

Pressure = 99992.8 Pa

We can express the pressure in terms of atmospheric pressure:

1 atm = 101325 Pa (approximately)

To compare the pressure with atmospheric pressure, we can convert 99992.8 Pa to atm:

Pressure in atm = 99992.8 Pa / 101325 Pa/atm

Pressure in atm ≈ 0.987 atm

The pressure exerted by a column of mercury that is about 760 mm high corresponds to approximately 0.987 atm. Since atmospheric pressure near sea level is approximately 1 atm, this calculation supports the claim that atmospheric pressure near sea level is equivalent to the pressure exerted by a column of mercury about 760 mm high.

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1 mol CO2 = 6.022x10^23 molecules of CO2

6x10^22 molecules of CO2 x [1 mole of CO2/6.022x10^23]

= 0.0996 moles of CO2

1 mole of carbon dioxide (CO2) contains 6 x 10^22 molecules.

There are two methods to calculate it:

1st method:

GIVEN DATA:

number of molecules=6.022×10²²molecules

Avogadro's number Na=6.022×10²²

TO FIND:

number of moles

SOLUTION:

As we know that number of moles=number of molecules/Na

number of moles=6.022×10²²/6.022×10²²

number of moles=1 moles

Avogadro’s number tells us the number of particles in 1 mole (or mol) of a substance. These particles could be electrons or molecules or atoms. The value of Avogadro’s number is approximately 6.022140857×1023 mol−1.

2nd method:

As we know that a mole of a substance contains 6.022×10²² particles of that substance so

1 MOLE OF CO2=6.022×10²²MOLECULES OF CO2

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Answer:

A

Explanation:

A

Answer:

Carboxylic acid

Explanation:

Asprin is a drug that contains the carboxylic acid functional group (R-COOH), ester functional group (R-O-CO-R') and the aromatic group (benzene ring).

When we take in aspirin, it becomes salicylic acid. This metabolite irreversibly inhibits the enzyme cyclooxygenase. Hence the the production of protective prostaglandins is blocked causing inflammation and pain.

Subaquatic soil can be classified as sediment or soil based on its geological properties and formation processes.

Sediment refers to any material that is transported and deposited by water, wind, ice, or gravity. Sediments can be composed of various materials, such as minerals, rocks, organic matter, and even human-made debris.

Sediments can accumulate in different environments, such as rivers, lakes, oceans, and deserts, and can be deposited in layers over time.

Subaquatic soil can be classified as sediment or soil based on its geological properties and formation processes. If it has primarily formed through sediment deposition, it is more appropriate to classify it as sediment.

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The total number of electoral votes does Virginia have is 13. This addressed in congressional apportionment.

When people cast their vote, means they actually voting for the group of people called electors. Senator and representatives are equal to the number of voters in each state . According to the question , Virginia has 11 people in the house and 2 senate means 11 + 2 = 13 . the total number of electoral votes are 13. These votes are assigned by united states electoral college. In the constitution the congressional apportionment is addressed.

Thus, Virginia has 11 people in the House and 2 in the Senate. The total number of electoral votes does Virginia have is 13. This addressed in congressional apportionment.

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