As much as 73,489 grams of water can evaporate from the Stingray Bay exhibit on a warm day. How much heat in kilojoules is required to evaporate this much water? Use 2.44 J/g as the heat of vaporization of water. Count your zeros carefully.

Answer:

-0.398

Explanation:

pOH is a measure of hydroxide ion (OH-) concentration in a solution. A basic solution If a solution has pOH less than 7 then it is a basic solution and if  pOH is greater than 7 then it is an acidic solution. Neutral solutions have pOH equal to 7.

\(pOH=-\log \left [ OH^- \right ]\)

To find pOH of 2.5 M NaOH, solve \(pOH=-\log \left [ 2.5 \right ]\) = -0.398

Answer:

True

Explanation:

sorry if I'm a little late and sorry if I got it wrong

The molecular formula mass of a compound is equal to the sum of the atomic masses of all the atoms in one molecule of the compound. Given that the molecular formula mass of a compound is 60.0 amu,

The molecular formula mass of a compound is 60.0 amu. It is important to note that the actual molecular formula of the compound was not given. Since the molecular formula mass of a compound is equal to the sum of the atomic masses of all the atoms in one molecule of the compound, the molecular formula mass can be used to determine the empirical formula of the compound.For instance, consider the molecular formula mass of glucose, which is C6H12O6. Its molecular formula mass is calculated by adding up the atomic masses of the constituent atoms: 6(12.01 amu) + 12(1.01 amu) + 6(16.00 amu) = 180.18 amu. This means that the molecular formula mass of glucose is 180.18 amu.

However, the molecular formula of a compound may not necessarily be its empirical formula. The empirical formula of a compound is the simplest whole number ratio of atoms of each element in the compound.For example, the empirical formula of glucose can be found by dividing the subscripts in the molecular formula by their greatest common factor: C6H12O6 → CH2O. This means that the empirical formula of glucose is CH2O.In conclusion, the subscripts in the actual molecular formula of a compound cannot be determined from the molecular formula mass alone. More information about the composition of the compound is needed to determine the actual molecular formula.

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The measurements taken in the experiment shows the purpose of the experiment.

A laboratory experiment is an empirical determination of facts. Experiments are the primary sources of scientific experiment.

To determine the purpose of experiment, we have to pay close attention to what the experiment is about such as the example shown in the question.  The measurements taken in the experiment shows the purpose of the experiment.

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Answer:

Adenine=33%

Thymine=33%

Guanine=17%

Explanation:

the base pairs percentages must be the same

Answer

- What is an electron?

An electron a stable subatomic particle with a negative charge of electricity, it is found in all atoms and acting as the primary carrier of electricity in solids.

- How does the electrons movement creates an electric current?

Electrons flow in a certain rate, creating an electric current. So the electrons moving freely from one place to another place will conduct electric current.

Answer:

When two plates press together and a mountain begins to form, which of the following happens? The plate slowly begins to bend because even though the plate material is hard it can still be bent and folded over a very long period of time.

Answer:

I'm assuming this is from a lab that you did - in which case, I can't really help you out here.

Explanation:

Answer:

Ian Somerhalder because he's JUST SO fine

Explanation:

The bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

Bond order is defined as the number of electrons in bonding molecular orbitals minus the number of electrons in antibonding molecular orbitals divided by two. As a result, we may determine the bond order of this diatomic particle by the formula: Bond order = (number of bonding electrons - number of antibonding electrons) / 2

Bond order = (8 - 5) / 2

Bond order = 1.5.

This diatomic molecule, according to the bond order, is a stable molecule since the bond order is greater than 1, indicating that it is a double bond. The molecule has an overall bond strength that is greater than a single bond, but not as strong as a triple bond. So therefore he bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

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The label CORROSIVE on a chemical container indicates that the contents are corrosive, meaning that contact with these materials can cause damage to living tissue and materials.

It is important to exercise caution when handling these materials and to ensure that the containers are well labeled and stored in a safe and secure location.

Corrosive chemicals are substances that can cause damage or destruction to other substances with which they come into contact by means of a chemical reaction. These reactions can occur on contact, or over a period of time. Corrosive chemicals can cause damage to the skin, eyes, respiratory tract, and other parts of the body.

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The standard reduction potential for the half-reaction of Be^2+ + 2e^- -> Be is given as E^0 = 3.83 V.

For the half-cell Hg^2+ | Hg, the standard reduction potential is not provided in the given information. To calculate the electric potential for the voltaic cell, we need the reduction potential for the Hg^2+ | Hg half-cell.

A voltaic cell, also known as a galvanic cell or an electrochemical cell, is an electrochemical device that generates electrical energy through a spontaneous chemical reaction. It consists of two half-cells connected by an external circuit and a salt bridge or porous barrier that allows the flow of ions between the two half-cells.

Each half-cell consists of an electrode immersed in an electrolyte solution. The electrode is typically made of a metal or a conductive material, and the electrolyte is a solution containing ions that can participate in the redox (reduction-oxidation) reaction.

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The reaction that can light the thermite is the combination of methane and oxygen. Option C

There is an ignition reaction when we burn a substance in another substance. Now, we know that an exothermic reaction refers to the kind of reaction hat is able to produce heat.

Since the exothermic reaction can be able to produce heat, this is the reaction that we can use to light the reaction between the magnesium and the oxygen so that we can be able to light the thermite.

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Answer:

Vanadium

Explanation:

Atomic number increases, thereby changing into an atom of Vanadium

Answer:

Vanadium

Explanation:

Science rocks

A girl roller-skating has kinetic energy.

Kinetic energy is the energy of motion. It is the energy possessed by an object due to its movement. In this case, the girl roller-skating has kinetic energy because she is moving.

Potential energy is the energy an object possesses due to its position or configuration. It is the energy an object has stored within it, ready to be released. An object at rest has potential energy because it has the potential to be set in motion and does work.

So, in this case, the girl roller-skating has kinetic energy because she is moving, and not potential energy because she is not at rest.

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Answer: Atomic # for Ca = 20

protons for Ca = 20

electrons for Ca = 20

Atomic # for Ca(2+) = 20

protons for Ca(2+) = 20

electrons for Ca(2+) = 18

Explanation:

Answer:

A

Explanation:

because the charge of Li ion is +1 well I don't know the explanation yet but I'm sure about the answer

Answer:

meiosis, mitosis

Explanation:

well if your asking for the cells, they split into 2 via mitosis. This is known as cell division which is what creates new body cells. But if you are talking about meiosis it makes the components for sexual reproduction in multicellular organisms like humans, who then sexually reproduce. Meiosis creates egg and sperm cells.

The body cells in multicellular organisms reproduce through mitosis and through meiosis. The correct options are A and D.

Cells in multicellular organisms are specialized to carry out particular tasks. For instance, red blood cells in humans are designed specifically to provide oxygen and nutrients to all bodily cells.

Additionally, germinal gametic cells divide by meiosis, whereas somatic cells of multicellular animals divide via mitosis.

Cell division, which is what produces new body cells, is this process. Meiosis, on the other hand, creates the elements needed for sexual reproduction in multicellular creatures like humans, who subsequently engage in sexual reproduction.

Therefore, the correct options are A. Through mitosis, and D. Through meiosis.

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Moles of NH3 = 0.3 moles

N2 + 3H2 → 2NH3

4.2021 g of N2

Required

moles of NH3

Solution

mol N2 :

= 4.2021 g : 28 g/mol

= 0.15

From the equation, mol NH3 :

= 2/1 x mol N2

= 2/1 x 0.15

= 0.3 moles

The balanced equation for the precipitation reaction  is
C2H6 + 7O2 + 4H2O → 2CO2 + 7H2O .

A precipitation reaction is a chemical reaction occurring in an aqueous solution where two ionic bonds combine, resulting in the formation of an insoluble salt which is called the precipitate. A precipitate is a solid that forms out of a solution.

The balanced equation for the precipitation reaction of C2H6 and which product is the precipitate is as follows:

C2H6 + 7O2 + 4H2O → 2CO2 + 7H2O

In this reaction, the product that is the precipitate is not specified as there is no indication of any other reactant involved in the reaction that can form a precipitate.

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Answer:

equal

Explanation:

Answer:

its c

Explanation:

The boiling-point of the solution will increase by 2.53°C due to the presence of 0.251 mol of naphthalene in 250. g of liquid benzene.

To calculate the boiling-point change for a solution, we can use the following formula:

\(ΔTb = Kbp × m\\\)

where ΔTb is the boiling-point change, Kbp is the boiling-point elevation constant, and m is the molality of the solution.

First, we need to calculate the molality of the solution. Molality (m) is defined as the number of moles of solute per kilogram of solvent. In this case, we have 0.251 mol of naphthalene in 250. g of benzene. To convert the mass of benzene to kilograms, we divide by 1000:

mass of benzene = 250. g = 0.25 kg

Now, we can calculate the molality:

molality = moles of solute / mass of solvent in kg

molality = 0.251 mol / 0.25 kg

molality = 1.00 m

Next, we can use the boiling-point elevation constant for benzene (Kbp = 2.53°C/m) and the molality of the solution (m = 1.00 m) to calculate the boiling-point change (ΔTb):

ΔTb = Kbp × m

ΔTb = 2.53°C/m × 1.00 m

ΔTb = 2.53°C

Therefore, the boiling-point of the solution will increase by 2.53°C due to the presence of 0.251 mol of naphthalene in 250. g of liquid benzene.

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Approximately 777.6 grams of water is needed to make 7.2 moles of glucose based on the balanced equation.

The balanced equation provided is:

6CO2 + 6H2O -> C6H12O6 + 6O2

From the equation, we can see that for every 6 moles of water (H2O), 1 mole of glucose (C6H12O6) is produced. Therefore, we need to determine the amount of water required to produce 7.2 moles of glucose.

The mole ratio between water and glucose is 6:1. This means that for every 6 moles of water, we obtain 1 mole of glucose. To find the amount of water needed for 7.2 moles of glucose, we set up a proportion using the mole ratio:

(6 moles H2O / 1 mole glucose) = (x moles H2O / 7.2 moles glucose)

Solving for x, we can cross-multiply:

6 moles H2O * 7.2 moles glucose = x moles H2O * 1 mole glucose

43.2 moles H2O = x moles H2O

Therefore, we need 43.2 moles of water to produce 7.2 moles of glucose.

To convert moles of water to grams, we need to know the molar mass of water, which is approximately 18 g/mol. Using the molar mass, we can calculate the mass of water needed:

Mass of water = moles of water * molar mass of water

Mass of water = 43.2 moles * 18 g/mol

Mass of water = 777.6 g

Therefore, approximately 777.6 grams of water is needed to make 7.2 moles of glucose based on the balanced equation.

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Answer:

CH4 + 4Cl2 ===> CCl4 + 4HCl

Explanation:

If you are having trouble understanding how to balance equations, use chemical equation calculators and they tell you step by step.

Approximately 35.90 grams of ice must melt to lower the water temperature to 0.0°C.

To solve this problem, we need to calculate the amount of heat that needs to be transferred from the water to the ice in order to lower the water temperature to 0.0°C.

First, let's calculate the initial heat content of the water. The specific heat capacity of water is 4.186 J/(g·K), and the mass of the water can be calculated using its density (1 g/mL) and volume (7.30 × 10^2 mL):

Mass of water = density × volume = 1 g/mL × 7.30 × 10^2 mL = 7.30 × 10^2 g

The initial heat content of the water can be calculated using the formula:

Heat content = mass × specific heat capacity × temperature change

Heat content = 7.30 × 10^2 g × 4.186 J/(g·K) × (25.0°C - 0.0°C) = 7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C

Next, we need to calculate the amount of heat that needs to be transferred from the water to the ice to lower the water temperature to 0.0°C. This heat transfer occurs during the melting of the ice.

The amount of heat required to melt the ice can be calculated using the formula:

Heat = mass of ice melted × latent heat of fusion

Let's assume that x grams of ice melts. The mass of the ice can be calculated using its density (0.92 g/mL) and volume (same as the volume of water):

Mass of ice = density × volume = 0.92 g/mL × 7.30 × 10^2 mL = 6.716 × 10^2 g

Heat = x g × 333.7 J/g

Now, we need to ensure that the heat transferred from the water to the ice is enough to lower the water temperature to 0.0°C. The heat transferred from the water to the ice is equal to the heat transferred from the water when its temperature drops to 0.0°C:

Heat content of water = Heat transferred to ice

7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C = x g × 333.7 J/g

Now, we can solve for x:

x = (7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C) / (333.7 J/g)

x ≈ 35.90 g

Therefore, approximately 35.90 grams of ice must melt to lower the water temperature to 0.0°C.

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