PLZ ANSWER WILL GIVE BRAINLIEST
Given the data shown, what two substances react with vinegar? Hint: (+) = a reaction occurred, (-) = no reaction

Gelatin and baking powder
Gelatin and baking soda
Salt and corn starch
Baking powder and baking soda

If you draw the table of the Hess law, you can use that table to obtain the enthalpy of reaction

A table called the "Hess's law table" can be created to depict how Hess's law is used. The reactants, intermediates, products, and related enthalpy changes (H) of each reaction that takes place during a chemical reaction are listed in the table.

Hess's law indicates that you can add the enthalpy changes of the separate reactions to get the total reaction's enthalpy change (H). By eliminating common species between neighboring reactions in the table, the overall reaction is achieved.

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nope it vaporized

.........pls Mark barinlist I

Answer:

The correct answer is Water boiling. Examples of physical change are freezing of water, boiling of water, melting of wax, etc. Examples of chemical change are digestion of food, burning of paper, rusting of metal, silver tarnishing, etc.

The substance with the weakest intermolecular forces, CH₄, would have the lowest magnitude for the heat of fusion among the given options. This is because weaker intermolecular forces require less energy to change a substance from a solid to a liquid.

Heat of fusion is the energy required to change a substance from its solid state to its liquid state without changing its temperature. It is a physical property that varies among different substances and can be used to compare their melting points. It depends on the strength of the intermolecular forces between its molecules. The stronger the intermolecular forces, the more energy is required to break them and change the substance from solid to liquid. Substances with weaker intermolecular forces require less energy for the same change in state.

Out of the given options, the substance with the lowest magnitude for the heat of fusion would be the one with the weakest intermolecular forces. Therefore, methane would require the least amount of energy to change from a solid to a liquid, and it would have the lowest magnitude for the heat of fusion.

In comparison, CH₃OH (methanol), NH₃ (ammonia), and CHF₃ (trifluoromethane) have stronger intermolecular forces due to the presence of hydrogen bonding, dipole-dipole interactions, and/or van der Waals forces. These stronger intermolecular forces make it more difficult to change these substances from a solid to a liquid, and they would require more energy to do so. Therefore, the heat of fusion of these substances would be higher than that of methane.

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Bond order of N2+ is 2.5. It is a diamagnetic substance.

Bond order is termed as the number of chemical bonds between a pair of the atoms. For example: In case of acetylene the bond order between the two carbon atoms is 3, in diatomic nitrogen the bond order is 3, and the C-H bond order is 1.

The bond order of N2+ is 2.5.

Bond order = 1 / 2[Nb - Na] Where, Nb = no. of electrons in bonding molecular orbital and Na = number of electrons in antibonding molecular orbital.

Bond order = 9-4 / 2

= 2.5

N2+ is diamagnetic in nature because they do not have any unpaired electrons they are having 14 electrons.

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Taking into account the definition of calorimetry, the change in temperature of a 5.0 g sample of water that loses 1800J of heat energy is 86.12 C.

In first place, calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is the amount of heat that a body can receive or give up without affecting its molecular structure. If the molecular structure does not change, the state (solid, liquid, gaseous) does not change. Since the molecular structure does not change, a change in temperature is observed.

In other words, sensible heat is the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

So, the equation that allows to calculate heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Replacing in the expression to calculate heat exchanges:

1800 J= 4.18\(\frac{J}{gC}\)× 5 g× ΔT

Solving:

1800 J ÷ (4.18\(\frac{J}{gC}\)× 5 g)= ΔT

ΔT= 86.12 C

In summary, the change in temperature of a 5.0 g sample of water that loses 1800J of heat energy is 86.12 C.

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The idea of the atomic nature of matter was first developed by John Dalton.

He introduced the atomic theory, which proposed that matter was made up of tiny, indivisible particles called atoms. This theory was based on his observations and experiments on the behavior of gases

.Dalton's atomic theory had several postulates that helped explain the properties of matter. These postulates were:

All matter is made up of atoms, which are tiny, indivisible particles

.Each element is composed of atoms that are identical in size, shape, and chemical properties.

Atoms of different elements have different sizes, shapes, and chemical properties.

Atoms combine in fixed ratios to form compounds, and the ratios of their masses are related by whole numbers.

Atoms are indestructible and cannot be created or destroyed in chemical reactions

.However, Dalton's atomic theory was later modified and expanded upon by other scientists, including J.J. Thomson, Ernest Rutherford, and Niels Bohr, as new discoveries about the structure and behavior of atoms were made.

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To bring the pH of the solution from 9.0 to 10.0, you need to add a specific amount of 5M KOH. The pH of a solution is a measure of its acidity or alkalinity. The pH scale ranges from 0 to 14, with values below 7 being acidic, 7 being neutral, and values above 7 being alkaline or basic.

To calculate the amount of 5M KOH required, we can use the Henderson-Hasselbalch equation, which relates pH, pKa, and the concentrations of the acid and base. In this case, glycine acts as a weak acid with a pKa value of 2.34. We can assume that the glycine will be completely dissociated in the solution. The concentration of glycine is given as 0.1M, which means that [A-] = 0.1M. We can calculate the concentration of [HA], which is the undissociated form of glycine, using the equation [HA] = [A-] * 10^(pKa-pH).

Substituting the values, [HA] = 0.1M * 10^(2.34-9) = 0.000000001M. To reach a pH of 10.0, we need to add enough KOH to react with all the [HA]. The balanced equation for the reaction is: HA + OH- → A- + H2O. The stoichiometry of the reaction shows that 1 mole of HA reacts with 1 mole of OH-. Therefore, the amount of KOH required is equal to the concentration of [HA], which is 0.000000001M. In conclusion, to bring the pH of the solution from 9.0 to 10.0, you need to add 0.000000001M of 5M KOH to 1.0L of 0.1M glycine.

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Answer:

Technically a microorganism or microbe is an organism that is microscopic. The study of microorganisms is called microbiology. Microorganisms can be bacteria, fungi, archaea or protists. The term microorganisms does not include viruses and prions, which are generally classified as non-living.

This hydrate has the formula CoCl2•6H2O and is often referred to as hexahydrate cobalt chloride.

When an 11.7 g sample of cobalt chloride is heated, 0.0712 mole of anhydrous cobalt chloride remains. This hydrate will most likely have formula CoCl2•6H2O and called as hexahydrate cobalt chloride.

This means that each mole of cobalt chloride is combined with six moles of water molecules. The hydrate is formed when the six water molecules surround the cobalt chloride molecule, forming an octahedral structure held together by hydrogen bonds.

The amount of water present in the sample can be determined by subtracting the amount of anhydrous cobalt chloride from the original sample weight.

This gives us the mass of water present in the sample.

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Answer:

Water is a remarkable substance, and its unique properties are largely due to the presence of polar covalent bonds and hydrogen bonds in its structure. These characteristics play a crucial role in the physical and chemical properties of water, making it essential for life as we know it.

Explanation:

The polar covalent bonds in water arise from the unequal sharing of electrons between oxygen and hydrogen atoms. This results in the oxygen atom having a partial negative charge (δ-) and the hydrogen atoms having partial positive charges (δ+). These charges create polarity within the water molecule, leading to the formation of hydrogen bonds.

Hydrogen bonds occur when the partially positive hydrogen atom of one water molecule is attracted to the partially negative oxygen atom of another water molecule. These hydrogen bonds are relatively weak individually, but when present in large numbers, they contribute to the cohesion, surface tension, and high boiling point of water.

The importance of these bonds is manifold. The cohesion between water molecules due to hydrogen bonding enables water to form droplets, have a high surface tension, and flow freely, facilitating transport within organisms and in the environment. Additionally, hydrogen bonding leads to the high specific heat capacity and heat of vaporization of water, making it an effective regulator of temperature in living organisms and ensuring stable environmental conditions.

Furthermore, hydrogen bonds play a crucial role in the unique properties of water as a solvent. The polar nature of water allows it to dissolve a wide range of substances, including ionic compounds and polar molecules, facilitating various biological processes such as nutrient transport and chemical reactions in cells.

Answer:

String a piece of twine between the cups. Use a long piece of string to help the sound travel farther. Tie a knot in the end of the string to keep it in the cup. Decorate the cups if desired. One person can hold the phone up to their ear and the other person can talk into the other cup. Keep the string tight or the sound waves won’t travel.

Explanation:

Equatorial attacks produce the alcohol in the equatorial position, which is axial, and axial attack produces the alcohol in the axial position, which is equatorial. The correct answer is B. Axial, equatorial, equatorial, axial.

Equatorial attacks produce the alcohol in the equatorial position, which is equatorial, while axial attacks produce the alcohol in the axial position, which is axial. This is due to the fact that in a cyclohexane molecule, the equatorial position is favored due to its lower energy state and greater stability compared to the axial position. Therefore, when an attack occurs, it is more likely to occur at the equatorial position, resulting in an equatorial attack. On the other hand, axial attacks occur when there is no other option but to attack from the axial position, which is less favorable but necessary in certain reactions. Therefore, the answer is C. Equatorial, axial, equatorial, axial.

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Answer:

1) Least reactive 2) Halogens 3) Nonmetals

Explanation:

Answer:

Carbon Monoxide

Explanation:

that is a gas called Carbon monoxide is colorless, odorless, tasteless gas and it is flammable and kind of toxic to humans and other oxygen breathing organisms.

so therefore Carbon monoxide is the answer

The segment register that can be used to form the source operand address in the instruction MOV AX, 100[BP][SI] is DS (Data Segment).

Without knowing the base for Y, it is not possible to establish a direct relationship between the three unsigned numbers X=1001001B, Y=120Q, and Z=5EH.

In the instruction MOV AX, 100[BP][SI], the segment register that can be used to form the source operand address is DS (Data Segment). The DS register holds the segment base address, which is added to the effective address to calculate the physical address of the source or destination data.

Regarding the relationship between the three unsigned numbers X=1001001B, Y=120Q, Z=5EH:

X=1001001B: This is a binary number represented in base 2. It has a value of 73 in decimal notation (base 10). The subscript "B" indicates that the number is in binary format.

Y=120Q: This number is represented using an unknown base, denoted by the subscript "Q." Without knowing the base, it's not possible to determine the exact value of Y or establish a relationship with the other numbers.

Z=5EH: This number is represented in hexadecimal notation (base 16). It has a value of 94 in decimal notation (base 10). The subscript "E" indicates that the number is in hexadecimal format.

Without knowing the base for Y, it is not possible to establish a direct relationship between X, Y, and Z.

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Answer:

Observation

-I smell onions

-My dog weighs 45 pounds

-It is 85 degrees outside today

Predictions

-My dog will bark at the vacuum cleaner

although he has never seen it before

-My mother is going to cook spaghetti for

supper next Tuesday

-It will be a long, hot summer

Explanation:

Answer:   Mg²⁺   &  N³⁻

Explanation:

Since Magnesium is in group 2, then it favors losing two electrons forming a cation with a charge of +2 ( Mg²⁺).

Since Nitrogen is in group VA, it favors gaining three electrons forming the anion with charge -3 (N³⁻).

S waves can only pass through solids, whereas P waves can pass through liquid, solids, and gases. This data is used by scientists to calculate the composition of the Earth. Seismometers all across the world can measure the S and P waves that come from an earthquake that strikes on one side of the planet, for instance.

When materials suddenly move within the Earth, such when they slip along a fault during an earthquake, seismic waves are produced. Seismic waves can also be produced by volcanic eruptions, explosions, landslides, avalanches, and even swiftly flowing rivers.

Earthquakes typically result from subsurface rock breaking unexpectedly and rapid movement along a fault. The seismic waves that cause the ground to tremble are brought on by this quick release of energy.

S waves can only pass through solids, whereas P waves can pass through liquid, solids, and gases. This data is used by scientists to calculate the composition of the Earth. Seismometers all across the world can measure the S and P waves that come from an earthquake that strikes on one side of the planet, for instance.

There are two different types of waves produced by earthquakes: primary (P) and secondary (S). Based on when they come and how they feel on the surface, they are classified. P waves, also known as primary waves, arrive first, followed by S waves, even comprehended as secondary waves. The ground trembles when an earthquake happens because of both waves.

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Answer:

Element Symbol Number of Atoms

Cobaltum Co 1

Oxygenium O 2

Hydrogenium H 2

The total number of atoms present in one molecule of cobalt hydroxide is three.

Atoms is the fundamental unit of any object and molecule is formed by the combination of one or more atoms.

Decomposition reaction of cobalt hydroxide is shown as:

Co(OH)₂ → Co²⁺ + 2OH⁻

From the stoichiometry of the reaction it is clear that one molecule of cobalt hydroxide contains 1 atom of cobalt and 2 atoms hydroxide. So total number of atoms is 3.

Hence total number of atoms in cobalt hydroxide is 3.

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Answer:

Option C - 1 mole

a) no of moles of solute = 4.1×0.05

moles = O.205

so the mass of of sodium chloride present is 0.205×58.44

Mass of NaCl = 11.98 g

b) no of moles of solute = 1.8×0.01= 0.018

so the mass of of sodium chloride present is 0.018×58.44

Mass of NaCl = 1.05g

C) number of moles of solute is 1 mole

mass of solute is =58.44g

d) mass =9.35g

So the conclusion is that 1 mole is the correct answer!!!!

Answer:

Hey mate here's your answer ⤵️

a mark or character used as a conventional representation of an object, function, or process, e.g. the letter or letters standing for a chemical element or a character in musical notation.

noun: letter, character, sign of written communication

Something used for or regarded as representing something else; a material object representing something,

or a character of some kind

Example:

Often something immaterial; emblem, token, or sign: "$"<< the dollar sign is a symbol used to show / means money

Hope this kinda helped

Answer:

I think it is B

Explanation:

Both prokaryotes and eukaryotes have all of those things except for organelles, which only eukaryotes have (also prokaryotes are smaller not eukaryotes)

Answer:  The two elements on the periodic table that may be produced in sad reactions are Oxygen and Nitrogen.

Explanation:

Both of these elements are part of the air we breathe and are required for survival, but under certain conditions, they can lead to sad reactions. Oxygen is required for respiration, but when it reacts with other substances in the body, it can lead to the production of free radicals, which can damage cells and cause mood disorders. Nitrogen is also required by the body, but when it reacts with oxygen and other substances in the air, it can lead to the formation of air pollutants, such as smog and ozone, which can also contribute to sad reactions.

Answer:

s= 0.5 at^2

0.5 x 9.81 x 3^2 = 44m

Explanation:

OB.

44 meters

Answer:

1 respuesta. fórmula empírica = CH2

Explanation:

Translatation: 1 Answer. empirical formula = CH2

a) The Lennard-Jones potential predicts the separation r_eq at the minimum energy U_min.

b) The U_min for this interaction at T=298 K is the value obtained from the Lennard-Jones potential equation when r=r_eq.

c) The ratio of U_min to the purely attractive van der Waals component of the interaction potential at r_eq can be calculated by comparing the attractive part (-A/r^6) to the total potential energy U_min.

d) The ratio of r_eq to r_0, where u(r_0)=0.4, can be determined by finding the value of r_eq where the potential energy is equal to 0.4 times the total potential energy at r=r_0.

e) The ratio of r_s to r_0, where r_s is the separation where the magnitude of the attractive adhesion force is maximum, can be determined by finding the value of r where the derivative of the potential energy with respect to r is equal to zero.

f) The value of F_max between the two atoms can be obtained by taking the negative derivative of the potential energy equation with respect to r and evaluating it at r=r_s.

a) The Lennard-Jones potential provides information about the relationship between energy and separation between two interacting atoms.

At the minimum energy (U_min), the potential predicts the separation r_eq, which corresponds to the equilibrium distance between the atoms. This is the distance at which the energy of the system is at its lowest point.

b) To determine the value of U_min at a given temperature (T=298 K), you can substitute the equilibrium separation r_eq into the Lennard-Jones potential equation and calculate the resulting energy value.

This will give you the U_min for the interaction.

c) The Lennard-Jones potential consists of two components: an attractive component (-A/r^6) and a repulsive component (B/r^12).

The ratio of U_min to the purely attractive van der Waals component of the interaction potential at r_eq can be calculated by comparing the magnitude of the attractive component to the total potential energy at the equilibrium separation.

This ratio provides insights into the relative contribution of the attractive force to the overall potential energy at equilibrium.

d) The ratio of r_eq to r_0 can be determined by finding the value of r_eq where the potential energy is equal to 0.4 times the total potential energy at r=r_0.

In other words, you need to solve the Lennard-Jones potential equation for r_eq when the potential energy is equal to 0.4 times the potential energy at r=r_0.

e) The ratio of r_s to r_0 is obtained by finding the value of r where the magnitude of the attractive adhesion force is maximum.

This can be determined by finding the separation r where the derivative of the potential energy equation with respect to r is equal to zero.

The value of r_s represents the separation at which the attractive force between the atoms is strongest.

f) The value of F_max between the two atoms can be obtained by taking the negative derivative of the Lennard-Jones potential energy equation with respect to r and evaluating it at r=r_s.

This will give you the magnitude of the maximum attractive adhesion force between the atoms.

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Approximately 0.171 g of morphine is needed to prepare 600 cm³ of a solution with a pH of 11.

To determine the mass of morphine needed to prepare the solution, we need to calculate the concentration of hydroxide ions ([OH-]) in the solution based on the given pH and then use stoichiometry to find the corresponding amount of morphine.

Given:

pH = 11

Volume of solution = 600 cm³

Molar mass of morphine = 285.3 g·mol⁻¹

First, we need to calculate the concentration of hydroxide ions ([OH-]) using the formula:

pOH = -log[OH-]

pOH = 14 - pH

pOH = 14 - 11

pOH = 3

Now, we can calculate the concentration of hydroxide ions ([OH-]) using the formula:

[OH-] = 10^(-pOH)

[OH-] = 10^(-3)

[OH-] = 0.001 M

Since morphine is a weak base, it reacts with hydroxide ions in a 1:1 ratio. So, the concentration of morphine (M) is also 0.001 M.

To calculate the mass of morphine needed, we can use the formula:

Mass = Concentration x Volume x Molar mass

Mass = 0.001 mol/L x 0.6 L x 285.3 g/mol

Mass = 0.17118 g

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Answer:

True

Explanation:

Both work because an element would be pure and compounds can be split into elements. This will work unless the substance isnt chemcially pure, but in this case it is so the answer would be true.