Which of the mechanical waves below has the most energy?
A. Red
B. Blue
C. Green
D. Gold

Answer:

yes it is

Explanation:

while boating or on the land it is the same amount of alcohol

Answer:

Any amount will be have the same effect on Blood Alcohol Content while boating OR on land .

Explanation:

Answer: 3 moles

Explanation: Divide 54 by 18 to get 3.

Answer:

54 protons

Explanation:

51 electrons 'balance' the charge of 51 protons....but there is three more PLUS charges ......means three more protons

51 + 3 = 54

The type of intermolecular force relates to the big difference in the electronegativities and is known as hydrogen bonding.

Intermolecular forces may be defined as the mechanism that mediates the interaction between the atoms of the molecules. It significantly includes the electromagnetic forces of attraction and repulsion between the atoms.

Some examples of intermolecular forces include London-dispersion force, dipole-dipole interaction, van der Waals interaction, hydrogen bonds, etc. Each one of them possesses a different set of characteristic properties distinctly. Some types of forces are also present in the body of living organisms.

Hydrogen bonding is a characteristic kind of interaction that remarkably includes dipole-dipole attraction between the most electronegative elements like Nitrogen, Oxygen, fluorine, etc., and the hydrogen atom.

Therefore, hydrogen bonding is a type of intermolecular force relates to the big difference in the electronegativities.

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Answer:

B) tracking the pH as the solution is gradually acidified

Explanation:

Got it right on the quiz!

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Answer:

B. tracking the pH as the solution is gradually acidified

Considering the definition of pH, the pH of 3.65 grams of HCl dissolved in 1250 mL distilled H₂O is 1.0969.

pH is the Hydrogen Potential. It is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.

Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:

pH= - log [H⁺]

The numerical scale that measures the pH of substances includes the numbers from 0 to 14. The pH value 7 corresponds to neutral substances. Acidic substances are those with a pH lower than 7, while basic substances have a pH higher than 7.

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

[tex]Molarity=\frac{number of moles}{volume}[/tex]

In this case, you know:

Replacing in the definition of molarity:

[tex]Molarity=\frac{0.1 moles}{1.250 L}[/tex]

Solving:

Molarity= 0.08 [tex]\frac{moles}{liter}[/tex]= 0.08 M

Hydrochloric acid is a strong acid, so in aqueous solution it will be totally dissociated. So the concentration of protons is equal to the initial concentration of acid. This is: [H⁺]= [HCl]= 0.08 M

Replacing in the definition of pH:

pH= - log (0.08 M)

Solving:

pH= 1.0969

Finally, the pH of 3.65 grams of HCl dissolved in 1250 mL distilled H₂O is 1.0969.

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pH:

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If the colored spheres are solutes, the overall direction of water would be out of the cell based on the principle of osmosis.

It is the movement of water molecules from the region of high water potential (low solutes) to the region of low water potential (high solute) through a selectively permeable membrane.

In the illustration, there are more colored spheres outside of the cell than inside of it. This means that there are more solutes outside the cell (lower water potential) than inside of the cell (higher water potential).

Thus, water will move from the inside of the cell to the outside until an equilibrium is established.

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[tex]w = \text{Number of mols} \times \text{Molar mass}=4.8 \times 58.5=280.8~ g[/tex]

We know,

Molar Mass of Sodium= 23 and,

Molar Mass of Chlorine= 35.45

[tex] \therefore \text{Molar Mass of Sodium chloride= 58.44 }\text{g/mol}[/tex]

So, The Molar Mass in Grams=

[tex]58.44 \frac{\text{g}}{ \cancel\text {mol}} \times 4.80 \: \cancel\text{mol} \\ \\ \text{Mass of NaCl }= 280.51\: \text {gram}[/tex]

Explanation:

1,it's crystal clear water and unique wild life.

2,It is home to many unique species animals and plants.

3, It's sediment have not been scoured by overriding continental ice sheet

Considering the definition of molar mass, the number of moles of Zn reactant used is 2 moles.

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

The balanced reaction is:

Zn(s) + 2 HCl(aq) → ZnCl₂ + H₂(g)

Assume that 130.8 grams of Zn was used in this reaction.

To determine the number of moles of hydrogen gas formed, you need to know the number of moles of Zn reactant was used.

So to determine the number of moles used you know that the molar mass of Zn is 65.37[tex]\frac{g}{moles}[/tex]. Then:

[tex]molar mass=\frac{mass}{number of moles}[/tex]

[tex]65.37\frac{g}{moles} =\frac{130.8 g}{number of moles}[/tex]

Solving:

number of moles× 65.37[tex]\frac{g}{moles}[/tex]= 130.8 g

[tex]number of moles=\frac{130.8 g}{65.37\frac{g}{moles}}[/tex]

number of moles≅ 2 moles

Finally, the number of moles of Zn reactant used is 2 moles.

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Answer:

Are molecules atoms that are chemically bonded together?

Image result for Molecules are chemically bonded atoms that work as a unit. Should the same kind of molecule be made up of the same kind of elements? Explain your answer

If this interaction is such that the total energy of the system is lowered, then the atoms bond together to form a molecule. Thus, from a structural point of view, a molecule consists of an aggregation of atoms held together by valence forces. Diatomic molecules contain two atoms that are chemically bonded.

Explanation:

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Answer:

12 atm

Explanation:

First, let us convert Celcius into Kelvin: 28.0 °C = 301.15 K and 129.0 °C = 402.15 K

For this question we must employ the Combined Gas Law: [tex]\frac{P_1V_1}{P_2V_2}=\frac{n_1RT_1}{n_2RT_2}[/tex], where [tex]P_1[/tex] is the initial pressure and [tex]P_2[/tex] is the new pressure.

We know that intitially, P=9 atm, V=30 L, and T=301.15K. From our problem, only temperature and pressure changes, while the number of moles, volume and the gas constant, R, stay the same, so they are irrelevant.

Thus, the filled out Combined Gas Law would be:

[tex]\frac{9 atm}{P_2}[/tex]=[tex]\frac{301.15K}{402.15K}[/tex], where the volume, moles of gas, and R are cancelled out.

We can manipulate this equation to derive the new pressure. We find that

9atm≈0.74885[tex]P_2[/tex].  

This means that

[tex]P_2[/tex]≈9/0.74885≈12 atm

The work (newton-metres) the dock worker have to exert to lift the boat to 5 m in air is 6506.85 Nm

This is simply defined as the product of force and distance moved in the direction of the force. Mathematically, it can be expressed as

Workdone (Wd) = force (F) × distance (d)

Wd = Fd

Output work = Fd

Output work = 950 × 5

Output work = 4750 Nm

Efficiency = (output / input) × 100

73% = 4750 / input

0.73 = 4750 / input

Cross multiply

0.73 × input = 4750

Divide both side by 0.73

Input work = 4750 / 0.73

Input work = 6506.85 Nm

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The substance Z will be a poison if it produces adverse effects on th body even in small quantities.

A poison is a substance which when ingested into the body of an organism causes harm or injury to that organism.

Poisons can be in gaseous, solid or liquid form.

Poisons may be natural or synthetic in nature.

The characteristics of poison include:

Therefore, the substance Z will be a poison if it produces adverse effects on th body even in small quantities.

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Answer:

1.67 moles (find this by dividing 53.7 by the gram formula mass of sulfur, which is about 32.1)

Answer:

A.moles of solute per liter of solution

Explanation:

the total number of moles of substances present; mass percentage, the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams.

:-befrank

The rate of forward reaction equal to the rate of reverse reaction hence  the amount of reactants will never reach zero.

A chemical reaction involves the combnation of two or more species to yiled products. We must know that a point is always reached in a reaction when the rate of forward reaction equal to the rate of reverse reaction hence  the amount of reactants will never reach zero.

Also, if the reaction starts with 0 molecules of reactants and 100 molecules of products, the amount of products will decrease overtime.

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Answer:

energy

Explanation:

The First Law of Thermodynamics (Conservation) states that energy is conserved, it cannot be created nor destroyed.

Considering the definition of dilution, the molarity of a solution prepared by diluting 7.0 mL of 4.0 M solution to a volume of 30 mL is 0.93 mL.

First of all, you have to know that when it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

In this case, you know:

Replacing in the definition of dilution:

4 M× 7 mL= Cf× 30 mL

Solving:

(4 M× 7 mL)÷ 30 mL= Cf

Cf= 0.93 mL

In summary, the molarity of a solution prepared by diluting 7.0 mL of 4.0 M solution to a volume of 30 mL is 0.93 mL.

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Answer:

3

Explanation:

the answer is 3 because it is 3 for the o2 so 3 you have to pay more attention for the small ditails

The mass of Sodium hydroxide which is needed to make 2.500 L of a 2.000 M NaOH solution is 200 grams.

Mass of any substance will be calculated by using their moles as:

n = W/M, where

W = required mass

M = molar mass

Given that, molarity of NaOH = 2M

Volume of NaOH solution = 2.5L

Moles of NaOH will be calculated by using the below equation as:

M = n/V

n = (2)(2.5) = 5 moles

Now we calculate the mass of NaOH of 5 moles as:

W = (5mol)(40g/mol) = 200g

Hence option (4) is correct.

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Answer:

d

Explanation:

Answer: 43 L

Explanation:

The amount of energy required to eat 5.25 g of Titanium from 85.5 celsius to 132.5 celsius is 129 joules.

Absorbed or released amount of heat will be calculated by using the below formula as:

Q = mcΔT, where

m = mass of titanium = 5.25g

c = specific heat of titanium = 0.523 J/gram degree celsius

ΔT = change in temperature = 132.5 - 85.5 = 47 degree celsius

On putting these values on the above equation we get,

Q = (5.25)(0.523)(47) = 129 joules

Hence required heat is 129 joules.

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A small sample of methane burns, releasing 120.0 kJ of heat and doing 830.0 kJ of work. The total energy released is -950.0 kJ.

Energy is a property that is transferred to a physical system, recognizable in the performance of work and in the form of heat and light.

A small sample of methane undergoes combustion. As the hot gas mixture expands, it releases energy (E).

The change in the energy is the sum of the heat released and the work done.

ΔE = q + w = -120.0 kJ + (-830.0 kJ) = -950.0 kJ

A small sample of methane burns, releasing 120.0 kJ of heat and doing 830.0 kJ of work. The total energy released is -950.0 kJ.

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Answer:

Genotype

Explanation:

A mutation is the change is DNA, aka the genotype

H_2O is the chemical formula of compound water.

Here

In water

There are

P₁V₁=P₂V₂

760.5=P₂.3

P₂=1266.6 torr

Hokkaido University researchers have synthesized an organic compound with a longer bond between carbon atoms than ever before - exceeding the assumed limit for carbon-carbon single bond (C-C) lengths. The researchers termed it a "hyper covalent bond." The novel polycyclic hydrocarbon named 10c is stable, and an X-ray analysis showed that its C-C bond lengths was as long as 1.806 angstroms, longer than the previously reported world records for hydrocarbons.

Answer:

B.

Explanation: