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Which of the following perfect squares has a square root of 4?
OA. 8
OB. 16
OC. 25
OD. 36
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Answer:

116.64 g

Explanation:

74.23÷14 This is # of moles .

# of moles for co = 5.302

Then mass of co2 = 116.64

Answer:

c

Explanation: just a chemachal

Fructose does not undergo hydrolysis because it is a monosaccharide (option c).

Monosaccharides are the simplest form of carbohydrates, consisting of a single sugar unit. Fructose is a monosaccharide and is commonly known as a fruit sugar. It is a hexose (option b), meaning it has six carbon atoms.

Hydrolysis is a chemical reaction that involves breaking down a compound by adding water molecules. However, monosaccharides like fructose do not undergo hydrolysis because they cannot be further broken down into simpler sugars through the addition of water.

They are already in their simplest form and do not require hydrolysis for digestion or utilization in the body.

On the other hand, disaccharides (option d) and polysaccharides (option e) are more complex carbohydrates composed of multiple sugar units.

They can undergo hydrolysis, where the chemical bonds between the sugar units are broken by the addition of water, resulting in the formation of monosaccharides.

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Answer:

0.021 in scientific notation is 2.1 x 10^-2

Explanation:

Since there are two zeros before the non-zero digits, 10 should be raised to -2.

hope this helps

Using scientific notation, one can express extremely big or extremely small values. When a number between 1 and 10 is multiplied by a power of 10, the result is represented in scientific notation. 0.021 in scientific notation is 2.1 x 10⁻².

A way to express numbers that are either too large or too little to be conveniently stated in decimal form is through scientific notation. It is also known as "scientific form" in Britain, because scientists, mathematicians, and engineers frequently use it for intricate calculations involving large numbers.

A condensed manner of writing numbers is known as scientific notation (also known as standard form). A number is represented by a number from 1 to less than 10, multiplied by a power of 10, when it is written in scientific notation.

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Answer:

B

Explanation:

because protons have a +1 charge and electrons have a -1 charge, so if an atom is neutral it must have the same amount of protons and neutrons

Since the gas particles are moving more quickly, the gas sample's volume will rise. The effects of heating a gas at constant pressure are accurately described by the statement.

Fast-moving particles found in gases frequently collide with one another and the container's side due to their rapid forward and backward motion. As the temperature increases, the particles become more energetic and move more swiftly.

When a gas is heated, its molecules start to move much more quickly, increasing the pressure inside the container the gas is being held in. If the container is not strong enough, the movement of the gas molecules will probably cause it to break.

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The image of the hydrogen bonding in water is shown in the image attached.

We know that the hydrogen bond has to do with the kind of bond that is existing between hydrogen and a highly electronegative atom in a compound. For instance in the water molecule, there is the hydrogen bond that is working between the oxygen atom and the hydrogen atom.

We can see that the image the hydrogen bonded water molecule has been color coded and the colors do stand in for the hydrogen and the oxygen atoms as well as the diverse kinds of interactions in the molecule.

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The concentration of hydroxide ion in a 0.21 m aqueous solution of hydroxylamine, NH2OH, is 1.4 x 10^-6 M. The pH of the solution is 8.85.

Hydroxylamine, NH₂OH, is a weak base that can react with water to produce hydroxide ions, OH-. The equation for the reaction is:
NH₂OH, + H₂O ⇌ NH₃OH+ + OH-
The equilibrium constant for this reaction is Kb = 1.1 x 10^-8. To find the concentration of hydroxide ions, we can use the expression for Kb:
Kb = [NH₃OH+][OH-]/[NH₂OH,]

Since the concentration of hydroxylamine is 0.21 M, we can assume that the concentration of NH₃OH+ is negligible compared to NH₂OH. Therefore, we can simplify the expression to:

Kb = [OH-]^2/0.21

Solving for [OH-], we get:
[OH-] = sqrt(Kb x 0.21) = 1.4 x 10^-6 M
To find the pH of the solution, we can use the expression:
pH = 14 - pOH
pOH = -log[OH-] = -log(1.4 x 10^-6) = 5.85
pH = 14 - 5.85 = 8.85
Therefore, the concentration of hydroxide ion in a 0.21 m aqueous solution of hydroxylamine is 1.4 x 10^-6 M and the pH is 8.85.

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Vapor pressure will increase with Temperature.

What does vapor pressure mean exactly?

The vapor pressure of a liquid is the pressure at which a vapor and its liquid (or solid) are at equilibrium, or the pressure at which a sample of a liquid (or solid) evaporates in a closed container to produce a vapor.

Vapor pressure for liquids is influenced by the following variables: Intermolecular Force and Temperature

The molecules of a liquid begin to move more quickly as the temperature rises. More vapor pressure is produced as a result of the production of gas. As a result, vapor pressure and temperature are directly related. The related graph will be a straight line graph since temperature and vapor pressure are directly proportional to one another.

Hence, Vapor pressure will increase with Temperature.

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Answer: D

Explanation:

apex

The statement that is incorrect about chemical equilibrium is that forward and reverse reactions have stopped. The correct option is c) Forward and reverse reactions have stopped.

What is chemical equilibrium?

Chemical equilibrium refers to the state of a reversible reaction where the rate of the forward reaction equals the rate of the reverse reaction, and the concentrations of the reactants and products do not change with time. In other words, chemical equilibrium refers to the point at which the concentrations of chemical species no longer change.

How do you know when equilibrium has been reached?

Equilibrium has been reached when the rate of the forward reaction equals the rate of the reverse reaction, and the concentrations of the reactants and products no longer change with time. This means that the concentrations of the reactants and products will remain constant. So, the correct option is d) Equilibrium has been reached when the concentrations of chemical species are no longer changing.

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The change in energy required to make 50.0 mL of water from its elements under standard conditions is approximately -793.5 kJ.

To calculate the change in energy required to make 50.0 mL of water from its elements under standard conditions, we need to first determine the number of moles of water being formed.

Water has a density of 1 g/mL, so 50.0 mL of water weighs 50.0 g. The molar mass of water (H₂O) is 18.02 g/mol. To find the number of moles, divide the mass by the molar mass:

moles of water = 50.0 g / 18.02 g/mol ≈ 2.775 moles

The standard molar heat of formation of water is -285.8 kJ/mol. Multiply this value by the number of moles to find the total change in energy:

Change in energy = 2.775 moles × (-285.8 kJ/mol) ≈ -793.5 kJ

So, the change in energy required to make 50.0 mL of water from its elements under standard conditions is approximately -793.5 kJ.

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The vapor pressure of isopropyl alcohol at 298.15 K is 0.0522 atm,

Isopropyl alcohol, also known as isopropanol or 2-propanol, is an organic compound with the molecular formula C3H8OThe vapor pressure of a liquid can be calculated using the Clausius-Clapeyron equation which states that the vapor pressure (P) can be calculated using the following equation:

P = Pᵣexp(−ΔHᵣ/R⋅T)

where Pᵣ is the vapor pressure of the liquid at its normal boiling point, ΔHᵣ is the enthalpy of vaporization of the liquid, R is the universal gas constant, and T is the temperature.

Therefore, the vapor pressure of isopropyl alcohol at 298.15 K is 0.0522 atm.

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Answer:

D. the solvent particles to be spread further out and have more to move, increasing their kinetic energy.

Explanation:

Explanation:

sweet,sour,salty, savoury

Answer: bitter

Explanation:

Answer:

Homeostasis helps animals maintain stable internal and external environments with the best conditions for it to operate. It is a dynamic process that requires constant monitoring of all systems in the body to detect changes, and mechanisms that react to those changes and restore stability.

Explanation:

i would say C. i hope im right

sorry if you get it wrong

Answer: Your teacher is correct, although yes not every element has a charge of 0.

Explanation:

Atoms are electrically neutral because they contain equal quantities of positively charged protons and negatively charged electrons. Electrons and protons have equal but opposite charges, so the result is no net charge.

Answer:

The correct answer is:

a) Saturated.

When salt is added to water until no more salt can be dissolved, it forms a saturated solution. A saturated solution is a solution in which the maximum amount of solute has been dissolved at a given temperature and pressure, and no more solute can dissolve. It is in a state of dynamic equilibrium, with solute particles constantly dissolving and precipitating at the same rate.

Answer: B. a molecule

Explanation: When atoms join together with a covalent bond, they form a molecule. In a covalent bond, atoms share electrons to achieve a stable configuration, which allows them to form a stable molecule.

Answer:B. A molecule. I hope this helps you

Explanation:

The correct answer is B - a molecule. When atoms join together with a covalent bond, they are sharing electrons with each other to form a stable molecular structure. This can happen between two or more non-metal atoms, and the resulting compound will have a neutral charge. Unlike an ion, which has a charge due to a gain or loss of electrons, a molecule is stable and does not possess an overall charge. Additionally, the bond formed between two atoms is strong and requires energy to break. This is different from a noble gas, which refers to an element that has a full outer shell and therefore does not easily form bonds with other elements.

Answer:

argon has an element structure of 2.8.8

Answer:

Argon

Explanation:

Argon has a electron configuration of 2.8.8. This shows an octate state, meaning that it has no lose pair of electrons. It has a total of 18 electrons on its shell

Answer:0.0054314469917931 mole using the molecular weight calculator and the molar mass of MgBr2.

Explanation:

Answer:

Too much iodine can be harmful if you don't need it. You don't need to take iodine (supplements) if you already have a varied and balanced diet.

Explanation:

Iodine is already contained in table salt so you don't need to add any more.

Water can exist in all three states—solid, liquid, and gas—under specific temperature and pressure conditions on Earth. These conditions are commonly found at the Earth's surface.

At temperatures below 0°C (32°F) and normal atmospheric pressure, water freezes and forms solid ice. In this state, water molecules are tightly packed in a crystalline structure.

At temperatures between 0°C and 100°C (32°F to 212°F) and normal atmospheric pressure, water exists as a liquid. In this state, water molecules have enough energy to move and flow freely.

At temperatures above 100°C (212°F) and normal atmospheric pressure, water vaporizes and becomes a gas. This process is known as boiling. In the gaseous state, water molecules have high energy and are widely dispersed.

These temperature and pressure conditions allow for the presence of liquid water in oceans, rivers, and lakes, solid water in the form of ice caps and glaciers, and gaseous water in the atmosphere as water vapor.

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Answer: an iceberg

Explanation: the reason for this is because it has much more mass then a hot cup of coffee even the the temputure of coffee is much warmer

Answer:

Its renewable

Explanation:

Geothermal energy is renewable as long as theres an infinite amount of magma to produce the energy. It is a rather expensive process, however, and can take up a ton of space. In my opinion, its a good source for energy if theres a cheap and easy way to tranfer the energy to homes

Answer:

liquids

Explanation:

are not solids

big brain answer

Answer:

\(\boxed {\boxed {\sf V_2=75 \ mL}}\)

Explanation:

Since the pressure is constant, the only variables we need to work with are temperature and volume. We will use Charles's Law, which states the volume of a gas is directly proportional to the temperature. The formula is:

\(\frac{V_1}{T_1}=\frac{V_2}{T_2}\)

Originally, the gas was 50 milliliters at 20 degrees celsius. Substitute these values into the left side of the equation.

\(\frac{50 \ mL}{20 \textdegree C}=\frac{ V_2}{T_2}\)

We don't know the volume of the new gas, but we know the temperature was changed to 30 degrees celsius.

\(\frac{50 \ mL}{20 \textdegree C}=\frac{ V_2}{30 \textdegree C}\)

Since we are solving for the new volume, we must isolate the variable. It is being divided by 30 °Cand the inverse of division is muliplication. Multiply both sides by 30 °C.

\(30 \textdegree C*\frac{50 \ mL}{20 \textdegree C}=\frac{ V_2}{30 \textdegree C}* 30 \textdegree C\)

\(30 \textdegree C*\frac{50 \ mL}{20 \textdegree C}= V_2\)

The units of degrees celsius cancel, so we are left with milliliters as the units.

\(30*\frac{50 \ mL}{20}= V_2\)

\(\frac{1500 \ mL}{20}= V_2\)

\(75 \ mL=V_2\)

The new volume of the gas is 75 milliliters.

You have two gases, A and B, each in its own container of equal volume, pressure, and temperature. As a result, each gas must contain the same number of moles.

Because the two temperatures are the same, the two samples' average kinetic energies are also the same.

Kinetic energy is a type of energy that a moving object or particle possesses. When an item undergoes work—the transfer of energy—by being subjected to a net force, it accelerates and acquires kinetic energy. A moving object or particle's kinetic energy, which depends on both mass and speed, is one of its properties. The type of motion could be vibration, rotation on an axis, translation (or travel along a path from one place to another), or any combination of these.

A body's translational kinetic energy, or 1/2mv2, is equal to one-half the product of its mass, m, and the square of its velocity, v. In chemistry, the moles, sometimes spelled mol, is a common scientific measurement unit for significant amounts of very small objects like atoms, molecules, or other predetermined particles. The mole represents 6.02214076 1023 units, which is a very huge number.

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2.7 is the chlorine dosage for this well, expressed in parts per million.

Unlike municipal water, well water does not go through a water treatment facility. That implies that it could be contaminated with poisons like lead, coliform bacteria, volatile chemical compounds, and others. chlorination in well water is done to fulfill the role that chlorine plays in municipal sources' water disinfection processes.

It is advised to start with a chlorine concentration of 50 to 100 parts per million (ppm).

Bacterial pollutants are eliminated from well water, well casings, holding tanks, and the entire water delivery system via shock chlorination. To shock chlorinate, a well driller with a license is trained.

Algae have been linked to green water, and they may thrive in both surface water and groundwater wells even in the absence of sunshine. Algae can color the water in both the pre-and post-decomposition stages with a variety of hues, including green, brown, and reddish.

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The option that is accurate temperature for the boiling point of water is option D.) 97°.

The student has the most precise set of measurement is option A.) Felipe's measurements are more precise and his average is more accurate.

In regards to temperature, At sea level, water tends to boils at 100° C ( that is at 212° F).

Note that At higher altitudes the temperature of the boiling point is  said to be lower.

Therefore, one can say that The option that is accurate temperature for the boiling point of water is option D.) 97°.

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