I need help plsssssssssssssss

Answer:

Energía geotérmica (calor → energía eléctrica) Motores térmico, como el motor de combustión interna utilizado en automóviles o el motor de vapor (calor → energía mecánica) Energía térmica oceánica (calor → energía eléctrica) Represas hidroeléctricas (energía potencial gravitacional → energía eléctrica)

Explanation:

Answer:

One type of energy can change into another type of energy. Energy transformation means the changing of energy from one type to another, e.g. from kinetic energy to electrical energy, or from potential energy to kinetic energy.

Explanation:

Answer:

The first one is Propane

The second one is HEPTANE

The third one is octane

The 4th is butane

the 5th is decane

The structures have been named according to IUPAC as \(\rm C_3H_8\) Propane, \(\rm C_7H_{16}\) Heptane, \(\rm C_8H_{18}\) Octane, \(\rm C_4H_{10}\) Butane, and \(\rm C_{10}H_{22}\) Decane.

The images has been the representation of the ball and stick structure of the compounds. The central balls have been the representation of the carbon atom , with small balls attached to the sticks have been the representation of the hydrogen attached.

The following structures has been given as:

The structures have been named according to IUPAC as \(\rm C_3H_8\) Propane, \(\rm C_7H_{16}\) Heptane, \(\rm C_8H_{18}\) Octane, \(\rm C_4H_{10}\) Butane, and \(\rm C_{10}H_{22}\) Decane.

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For the given atomic notation of Zinc, there are 30 protons, 34 neutrons and 30 electrons.

What is mass number?

In Chemistry, mass number is also referred to as atomic number and it can be defined as the total number of protons and neutrons found in the atomic nucleus of a chemical element.

Mathematically, mass number is given by this formula:

A = Z + N  or \(^A_ZC\)

Where:

Therefore, we can deduce the following from \(^{64}_{30}Zn\);

Number of protons = 30

Mass number = 65

Substituting the parameters into the formula, we have;

\(64=30 +N\\\\N=64-30\)

Number of neutrons, N = 34.

Since the number of protons is equal to 30, there are 30 electrons in an atom of Zinc.

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The statement that correctly describes one of the bulk elements necessary for life is: 3. Carbon (C) has 4 valence electrons and is likely to form covalent bonds.

Carbon is a crucial element for life as it forms the backbone of organic molecules, which are the building blocks of living organisms. In its atomic structure, carbon has six electrons, with four of them located in its outermost energy level, known as the valence electrons. These valence electrons determine how carbon interacts with other atoms to form chemical bonds.

Carbon is unique in that it can form strong covalent bonds with other carbon atoms, creating long chains or rings, which serve as the basis for complex organic molecules. The four valence electrons of carbon allow it to share electrons with other atoms, leading to the formation of stable covalent bonds. These covalent bonds involve the sharing of electron pairs between carbon and other atoms, such as hydrogen, oxygen, nitrogen, and many others.

This ability of carbon to form covalent bonds with a variety of elements is the foundation of organic chemistry, which is the chemistry of life. Carbon-based compounds, also known as organic compounds, include essential molecules like carbohydrates, lipids, proteins, and nucleic acids, which are vital for biological processes.

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Answer:

I will say to my friend that

pure or distilled water does not conduct electricity

but instead of this.

water conduct electricity

be aware of it

Answer:

C

Explanation:

Took the test

In her book A Vindication of the Rights of Women, British author Mary Wollstonecraft advocated that women should be treated with the same respect and decency as men, particularly when it comes to education. Thus, option C is correct.

A Vindication of the Rights of Woman (1792), a groundbreaking feminist text, asserts that girls should be given the same privileges as males.

So that they might become outstanding husbands, mothers, and laborers in addition to being educated to be frivolous and inept by the educational system.

Women should be given the same opportunities as men, and women share the same capacity for reasoning at birth. Women should have the same rights to influence, expertise, and power in society as men do.

Therefore, Men have failed in their attempts to safeguard women because they have not given them the means to do so.

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Answer:

Krypton

Explanation:

mark this brainy if correct

Explanation:

The molarity or molar concentration is can be calculated by dividing the number of moles of solute by the volume of solution in L.

molarity = moles of solute/volume of solution in L

We want to prepare 6.7 L of a 1.2 M solution of CuF₂. We can find the number of moles of CuF₂ that we have to dissolve in the solution.

molarity = 1.2 M

volume of solution in L = 6.7 L

molarity = moles of CuF₂/(volume of solution in L)

moles of CuF₂ = molarity * volume of solution in L

Answer:

Photosynthesis, process by which green plants and certain other organisms use the energy of light to convert carbon dioxide and water into the simple sugar glucose. In so doing, photosynthesis provides the basic energy source for virtually all organisms.

Explanation:

Answer:

The electrons are attracted to the nuclei of both atoms.

Explanation:

Electrons are attracted to nuclei because nuclei are positively charged and electrons are negatively charged. Opposites attract

Answer:

c. side chain

Explanation:

c. side chain. The variable part of an amino acid, which is the unique chemical structure that distinguishes one amino acid from another, is the side chain (also known as R-group).

The side chain, commonly referred to as the R-group, is the variable component of an amino acid and the particular chemical structure that sets one amino acid apart from the others. Each amino acid shares the same fundamental structure, which consists of a core alpha carbon atom bound to a hydrogen atom, an amino group (NH₂), an acid group (COOH), and an amino group (NH₂). The particular collection of atoms connected to the core carbon is known as the side chain, and it differs amongst various amino acids. The amino acid's distinct characteristics and roles in protein synthesis and biological processes are determined by the side chain's make-up and structure.

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The expected products of the reaction between CH₃OH and CH₃C≡C⁻Na⁺ are propyne (CH₃C≡CH) and NaOH (sodium hydroxide).

The reaction between CH₃OH (methanol) and CH₃C≡C-Na⁺ (sodium acetylide) can be described as a nucleophilic substitution reaction, where the acetylide ion (C≡C⁻) acts as the nucleophile attacking the carbon atom of the methanol molecule.

The products of the reaction will depend on the conditions and the reaction mechanism. However, under typical conditions, the most likely products are:

1. CH₃C≡CH (propyne): The nucleophilic attack by the acetylide ion on the carbon atom of methanol leads to the formation of an alkyne bond between the carbon atom of methanol and the carbon atom of the acetylide ion.

2. NaOH (sodium hydroxide): When the acetylide ion reacts with methanol, sodium hydroxide (NaOH) is typically used as a neutralizing agent to convert the resulting acidic solution to a salt.

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Answer:

2, I believe.

Explanation:

In the cO2 molecule, each oxygen atom has two lone pairs of electrons. The carbon atom has no lone pairs.

Explanation:

In the cO2

molecule, each oxygen atom has two lone pairs of electrons. The carbon atom has no lone pairs. The carbon-oxygen bonds are double bonds.

Answer:

it have been already balanced

2H2 + O2 = 2H2O.

Answer:

64 grams of oxygen

Explanation:

Water has a molar mass of 18.0 grams/mole.  Oxygen, at 16 g/mole, accounts for 16/18 or 88.89% of the total.

72 grams of water would this contain (72g)*(0.88.89) = 64 grams of oxygen.

Two 4s electrons and six 3d electrons make up one atom of fe. A fe2 ion would have FOUR unpaired electrons.

1s2 2s2 2p6, 3s2 3p6, and 4s2 3d6 make up the electrical configuration of fe.Thus, there are four unpaired electrons in the third subshell.This demonstrates fe's paramagnetic properties.Both the 3d and 4s orbitals have almost the same energy. It's also important to note that, in contrast to the other orbitals, the third orbital has a single pair of electrons. Iron exists in two valence states, +3 and +2, as was previously mentioned. As a result, when it loses the two 4s electrons, it gets a valency of +2.

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Answer:

2

Explanation:

2 is correct because the number of charges on the nucleus increases, causing a stronger attraction for the bonding of electrons (and thus greater electronegativity).

While IUPAC is used for the naming of many types of compounds, it is not commonly used for naming sugars.

This is because sugars have a complex and diverse set of structures and properties that make them difficult to classify using traditional naming conventions. Instead, a different naming system is used for sugars, called the Fischer projection.
The Fischer projection is a graphical representation of the three-dimensional structure of a sugar molecule. It is used to show the orientation of the molecule's carbon atoms and the positions of its functional groups. The Fischer projection is a useful tool for identifying and naming different types of sugars, and it is widely used in the field of biochemistry.
IUPAC is a useful tool for naming many types of compounds, it is not commonly used for naming sugars. Instead, the Fischer projection is used to represent the complex structures of these molecules in a way that is easy to understand and communicate.

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Answer:

3.8 L

Explanation:

Divide moles by the molarity to find the liters necessary.

0.95/0.25 = 3.8

The first word in the name of an ester is derived from the alcohol used in the esterification.

Esterification is a chemical process where an organic acid with the formula is combined with an alcohol molecule having the chemical formula (ROH).

The process of esterification is known to produce an ester molecule and during this phenomenon is released water (H2O).

An example of an esterification reaction occurs when ethanoic acid (i.e., the active ingredient of vinegar) can react with C2H5OH (i.e., ethanol) in order to form the ethyl ethanoate molecule, which is a well-known ester molecule.

In conclusion, the first word in the name of an ester is derived from the Alcohol used in the esterification.

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To determine the activation energy, Ea, using the Arrhenius equation, we need to plot the natural log of k (ln k) against the reciprocal of absolute temperature (1/T), and the slope of the line will give us the activation energy (Ea/R), where R is the gas constant.

Let's assume that we have some experimental data for the rate constant, k, at different temperatures, and we want to determine the activation energy using the Arrhenius equation. Here's how we can do it:

Convert the temperature, T, to Kelvin by adding 273.15 to the Celsius temperature. Let's say we have the following data:

T (°C) k (s^-1)

25 1.00E-03

35 2.00E-03

45 4.00E-03

55 8.00E-03

65 1.60E-02

Converting the temperatures to Kelvin, we get:

T (K) k (s^-1)

298.15 1.00E-03

308.15 2.00E-03

318.15 4.00E-03

328.15 8.00E-03

338.15 1.60E-02

Calculate the reciprocal of absolute temperature, 1/T, by taking the inverse of the Kelvin temperature:

T (K) 1/T (K^-1) k (s^-1)

298.15 3.351E-03 1.00E-03

308.15 3.240E-03 2.00E-03

318.15 3.134E-03 4.00E-03

328.15 3.032E-03 8.00E-03

338.15 2.934E-03 1.60E-02

Calculate the natural log of the rate constant, ln k, for each temperature:

T (K) 1/T (K^-1) k (s^-1) ln k

298.15 3.351E-03 1.00E-03 -6.9078

308.15 3.240E-03 2.00E-03 -6.2146

318.15 3.134E-03 4.00E-03 -5.5215

328.15 3.032E-03 8.00E-03 -4.7875

338.15 2.934E-03 1.60E-02 -4.1321

Plot ln k against 1/T, and fit a straight line to the data using a linear regression.

Calculate the slope of the line, which is equal to -Ea/R, where R is the gas constant (8.314 J/mol.K):

slope = -2.303 * (gradient)

Ea/R = -slope

Ea = -slope * R

In this case, the slope of the line is 4592 K, so:

Ea/R = -4592 K

Ea = -4592 K * 8.314 J/mol.K

Ea = -38,202 J/mol or -38.2 kJ/mol

Therefore, the activation energy for this reaction is approximately -38.2

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Metallic elements exist in a solid-state and they are opaque, have a shiny surface, good conductors of electricity and heat, malleable and ductile, and are dense. The structure of metals is formed by atoms that are held together by metallic bonds. These atoms have loosely bound valence electrons that can be shared between the neighboring atoms.

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The correct answer is the amount of sodium chloride needed to make this eye solution isotonic with tears is approximately 1.85 grams. Rounding it up to the nearest whole number gives us the answer as 2. Hence, the correct option is 22.

The given solution is a hypotonic solution as the solution's tonicity is lower than that of the tears. The tears contain 0.9% w/v of NaCl, which is isotonic with tears. So, to make the given solution isotonic, the amount of sodium chloride needs to be added.

The concentration of NaCl in tears is 0.9% w/v. Additional Information: We know that % w/v is the amount of solute present in grams per 100 ml of the solution. Therefore, 0.9% w/v means 0.9 grams of NaCl is present in 100 mL of tears.

To make 30 ml of isotonic solution, we can use the following formula: Equivalent weight of NaCl = 58.5/2 = 29.25 (as NaCl ionizes to give Na+ and Cl- ions)Moles of NaCl required to make 30 ml isotonic solution = 0.9 × 30 / 1000 = 0.027Moles of Na+ and Cl- ions present in 30 mL of isotonic solution = 2 × 0.027 = 0.054

A number of grams of NaCl needed to prepare 30 mL of isotonic solution is calculated as follows:0.054 g = (0.027 x 29.25 x X) / 1000Where X is the amount of NaCl required to make 30 mL isotonic solution. Solving this equation gives us: X = 1.85 g (approx). Therefore, the amount of sodium chloride needed to make this eye solution isotonic with tears is approximately 1.85 grams. Rounding it up to the nearest whole number gives us the answer as 2. Hence, the correct option is 22.

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Answer:

Ba(ClO)₂

Explanation:

The compound formed from barium and hypochlorite is barium hypochlorite, and its chemical formula is Ba(ClO)₂.

A chemical element with the atomic number 56 is barium (Ba). It belongs to the alkaline earth metal family and when it forms compounds, it has a 2+ charge.

This indicates that two electrons must be rapidly lost by barium in order to produce a stable electron configuration.

One chlorine atom (Cl) and one oxygen atom (O₂) combine to form the anion hypochlorite (ClO-) (O). The hypochlorite ion has a net charge of -1 due to the 1-charged oxygen atom and the 1-charged chlorine atom.

The 2+ charge of barium interacts with the 1- charge of the hypochlorite ion throughout the reaction to create a neutral molecule.

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Answer:

A. The children will be more likely to survive than if they did not have the trait.

Explanation:

Process of elimination

B. It will not affect the children.

Cannot be true, if it didn't impact the children then how would survival of the fittest work?

D. The children will be able to adapt if the environment changes.

That just... not how adapting works when it comes to evolution.

C. The children will be more likely to survive than their parents were

Everyone has the same trait, everyone is equal in that regard.

A. The children will be more likely to survive than if they did not have the trait.

"Suppose a pair of animals has a trait that helps them survive in their environment." The trait helps them survive. Not having the trait makes them less likely to survive. A is correct

The term molecular mass can only be applied to a(n) covalent compound since compounds do not consist of molecules. the correct term that is applicable to all types of compounds is mass. covalent

The molecular components of a compound offer the smallest integer ratio of the atoms withinside the compound. Different compounds may have identical molecular components. The term "molecular weight" isn't suitable while speaking about ionic compounds that aren't made from personal molecules

An atom and its ion have identical atomic mass due to the fact the mass of the electron that turns an atom into an ion is negligible. The term "molecular weight" won't be suitable due to the fact the components of an ionic compound now no longer describe the composition of an unmarried molecule.

Something like desk salt (NaCl) is a compound due to the fact it's miles made from a couple of elements (sodium and chlorine), however, the bonds that keep NaCl collectively are ionic bonds, so in a molecule There is none. Sodium chloride may be stated to be an ionic compound if desired.

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Answer: Balanced forces

Explanation: Equal forces acting in opposite directions are called balanced forces. Balanced forces acting on an object will not change the object's motion.

If more solute is added to a solvent, more than is able to dissolve at a given temperature, a(n) equilibrium will be established between dissolved and undissolved solute.

A condition of an item known as equilibrium is one in which two or more opposing forces, whether internal, external, or a combination of both, act on it and cancel one another out to maintain the object in the same state as before. The Latin word libra, which meaning weight or balance, is the word's etymological ancestor.

Here are a few instances of equilibrium:

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Reaction rate increases at lower substrate concentrations due to increased collision frequency, while reaction rates plateau at higher substrate concentrations due to enzyme saturation. True statements: Enzymes are biological catalysts, decrease activation energy, and denaturation occurs above and below optimal temperature and pH.

The reaction rate increases at lower substrate concentrations because there are fewer substrate molecules available to collide with the enzyme active sites. With fewer collisions occurring, the chance of successful enzyme-substrate binding and product formation becomes more significant, leading to a faster reaction rate.

The reaction rates plateau (level off) at higher substrate concentrations because all available enzyme active sites become saturated with substrate molecules. At this point, adding more substrate does not increase the rate of the reaction because the enzymes are working at their maximum capacity. It forms a bottleneck where the rate becomes limited by the enzyme's catalytic activity and the number of available active sites.

True statements regarding enzymatic reactions:

Enzymes are biological catalysts, which means that they do not get altered structurally in a chemical reaction.

Enzymes decrease the activation energy of a chemical reaction, making it easier for the reaction to proceed.

Denaturation of enzymes occurs above and below the optimal temperature and pH of enzyme activity. Enzymes have an optimal temperature and pH range in which they exhibit the highest activity. Deviating from these optimal conditions can cause the enzyme to denature, resulting in a loss of its structure and function.

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