What is the pressure in a 20.4 l cylinder filled with 0.682 mol of nitrogen gas at 324 k ?

if gold has a rare, high density then it would sink quickly. If mixed substances that are less-valued, are added to the gold crown (remember that gold is rare and very dense which makes it special) then we can assume the cheap substances are less dense, thus making the crown FLOAT more rather than sink (I say more, because unless the crown was extremely mixed with cheap material then it could possibly float but it depends on how much is in the crown). Summary: The crown would either be lighter and float, or barely be sunken due to the less-dense substance.

*Hint to think about: People consider cheaper things lighter such as plastic ring/less dense  for example, compared to a silver ring which is heavier/more dense (btw heavy does not always mean high density, it depends on the liquid density )

Explanation:

Answer:

i dont undersstand lol

Explanation:

Explanation:

bhag bhag aaya sheer

..........

1.  the final concentration of NaOH after adding 125 mL of water to 45.3 mL of 0.71 M NaOH solution is approximately 0.189 M.

2.  the final concentration of KOH after adding 550 mL of water to 125 mL of 3.01 M KOH solution is approximately 0.557 M.

1.) If 125 mL of water is added to 45.3 mL of a 0.71 M NaOH solution, the resulting solution will be a diluted NaOH solution. The addition of water will increase the total volume while reducing the concentration of NaOH. To determine the final concentration of NaOH, we need to consider the conservation of moles.

First, let's calculate the moles of NaOH in the initial solution:

moles of NaOH = volume (in L) × concentration (in M)

moles of NaOH = 0.0453 L × 0.71 M = 0.0321433 moles

After adding 125 mL (0.125 L) of water, the total volume of the solution becomes 0.0453 L + 0.125 L = 0.1703 L.

To find the final concentration, we divide the moles of NaOH by the total volume:

final concentration of NaOH = moles of NaOH / total volume

final concentration of NaOH = 0.0321433 moles / 0.1703 L ≈ 0.189 M

Therefore, the final concentration of NaOH after adding 125 mL of water to 45.3 mL of 0.71 M NaOH solution is approximately 0.189 M.

2.) If 550 mL of water is added to 125 mL of a 3.01 M KOH solution, the resulting solution will also be a diluted solution. Again, we will apply the conservation of moles to determine the final concentration of KOH.

First, calculate the moles of KOH in the initial solution:

moles of KOH = volume (in L) × concentration (in M)

moles of KOH = 0.125 L × 3.01 M = 0.37625 moles

After adding 550 mL (0.55 L) of water, the total volume of the solution becomes 0.125 L + 0.55 L = 0.675 L.

To find the final concentration, divide the moles of KOH by the total volume:

final concentration of KOH = moles of KOH / total volume

final concentration of KOH = 0.37625 moles / 0.675 L ≈ 0.557 M

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A dark colored peppered moths has a better survival rate in the forest than a light colored peppered moth due to their color difference which exposes the moths to predators.

Why do color matter in peppered moths?

Peppered moths usually have white with black spots across the wings. Organisms like to camouflage to boost their survival rate as they will be able to blend with the environment in other to evade predators.

The  dark colored peppered moths have the ability to evade predators more due to their color, as they can easily blended in with the dark tree trunks and the forest. While the light peppered moths will be easily picked by predators because of their color.

In summary, peppered moths are found in places like the tree trunks, dark forest where they can feed on leaves of some trees. The color of their wings has the ability to boost their survival chances.

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Answer:

Respiration happens in the cells of plants, animals and humans, mainly inside mitochondria, which are located in a cell's cytoplasm. The energy released during respiration is used by plants to make amino acids, and by animals and humans to contract their muscles to let them move.

Explanation:

Carbon dioxide,Ammonia,Oxygen,Water,Hydrogen fluoride,Nitrogen are the polarity of 6 real molecules

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Answer:

177.3kg C₂₁H₄₄

Explanation:

Based on the chemical reaction:

C₂₁H₄₄ → 3C₂H₄ + C₁₅H₃₂

Where 1 mole of C₂₁H₄₄ produce 3 moles of ethene, C₂H₄.

To solve this question we need to determine the moles of ethene in 50.4kg. 1/3 these moles are the moles of C₂₁H₄₄ that must be added:

Moles Ethene -Molar mass: 28.05g/mol-

50.4kg = 50400g * (1mol / 28.05g) = 1796.8 moles of ethene

Moles C₂₁H₄₄:

1796.8 moles of ethene * (1 mol C₂₁H₄₄ / 3 mol C₂H₄) = 589.93 moles C₂₁H₄₄

Mass C₂₁H₄₄:

589.93 moles C₂₁H₄₄ * (296g / mol) = 177283g =

1. B, the energy associated with the motion of an object

2. C, 12.4 g/mL

3. C, 5

1) B) Kinetic energy is energy associated with the motion of an object.

2) B) Density equals mass divided by volume: 1.38 g/mL

3) C) There are 5 significant figures in 20.300

4) A) 80 is the atomic number for mercury on the periodic table.

5) E) The formula for copper (II) sulfate pentahydrate is CuSO4•5H2O

So in summary:

• Kinetic energy is the energy of a moving object due to its motion.

• Density is calculated by dividing an object's mass by its volume.

• Significant figures refer to the known precision of a measurement based on the digits reported.

• Atomic symbols represent elements on the periodic table.

• Chemical formulas use symbols of the elements to show the proportions of atoms in a compound.

\(KCl(ag) + AgNO_3(aq)\) → \(KNO_3(aq) + AgCl(s)\) is the precipitation reactions.

A precipitate is an insoluble substance. A reaction in which insoluble solid precipitate is formed is called Precipitation Reaction.

For example, When Sodium Sulphate solution is mixed with Barium Chloride solution It forms Barium Sulphate and Sodium Chloride solution.

Precipitation reactions are usually double displacement reactions involving the production of a solid form residue called the precipitate.

These reactions also occur when two or more solutions with different salts are combined, resulting in the formation of insoluble salts that precipitate out of the solution.

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OF. from the cooler air to lower the temperature of the water to 4.500

Answer:

there you go man

Explanation:

Answer:

1.62x10⁻³ moles of NaOH were dispensed

Explanation:

Molarity is an unit in chemistry defined as the ratio between moles of solute (In the problem, NaOH), per liter of solution.

The concentration of the solution is 0.125moles per liter. That means 1L of solution has 0.125 moles of NaOH.

The volume you dispensed in the buret was:

15.67mL - 2.73mL =

12.94mL of the 0.125M NaOH are:

12.94mL = 0.01294L * (0.125moles / L) =

Magnesium have two valence electrons. Because the outer energy level  for the magnesium atom is 3 and it has two electron in this energy level.

The Valence electrons are defined as the electrons that located in the outermost electron shell of an atom. These valence electrons being the furthest from the nucleus and thus the least tightly held by the atom are the electrons that participate in bonds and reactions. The number of valence electrons that an element has determines its reactivity, electronegativity and the number of bonds it can form. We can use the periodic table to help to determine how many valence electrons an element specifically a neutral atom of the element has. Looking at the group that the element is in as the group number indicates the number of valence electrons that the element has.

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Answer:

6.9 ml of concentrate

Explanation:

100 ml   of .1 M   will require .01 moles

from a 1.45 M solution,  .01 mole would be

  .01 mole / ( 1.45 mole / liter) = 6.9 ml of the concentrate   then dilute to 100 ml

To find the mass of sodium bicarbonate needed to make a 2.2 liters of a 0.45 m solution, we can use the formula:
mass = volume × molarity × molar mass

where volume is in liters, molarity is in moles per liter, and molar mass is in grams per mole.
The molar mass of sodium bicarbonate is 84.01 g/mol. So, we can plug in the values into the formula:
mass = 2.2 L × 0.45 mol/L × 84.01 g/mol

mass = 83.32 g
Therefore, 83.32 grams of sodium bicarbonate is needed to make a 2.2 liters of a 0.45 m solution.

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At the end of the 3-hour time period, the concentrations of Mn2+ and Au3+ in the two compartments will depend on various factors such as the initial concentrations, the rate of diffusion, and the reaction kinetics. Without knowing the specific conditions of the experiment, it is difficult to provide an exact answer.

However, it is important to note that both Mn2+ and Au3+ ions have different chemical properties and may react differently with the substances present in the compartments. It is also possible that the concentrations of the ions may reach equilibrium over time. To accurately determine the concentrations of Mn2+ and Au3+ in the compartments, further experiments and measurements would be required. Additionally, factors such as temperature, pressure, and the presence of other ions may also affect the final concentrations.

Therefore, it is important to carefully design experiments and consider all relevant factors when studying the behavior of chemical species in different compartments.

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Answer:

The answer should be that a constant pressure is applied to both cylinders and they are balanced chemical equations for the reaction between nitrogen oxygen.

Explanation:

It is possible to determine the direction of blood flow from blood spatter B. By looking at the shape of the drip and tail to see the possible direction.

The shape of blood spatter can provide information about the direction and speed of blood flow, as well as the angle of impact, the type of weapon or force that caused the bloodshed, and other details about the crime scene.

One way to determine the direction of blood flow from a blood spatter pattern is to examine the shape of the spatter. Blood drops that are elongated or have a tail shape may indicate the direction of travel of the blood, since they tend to be stretched in the direction of motion.

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Answer:

C

Explanation:

it's produced in the bone marrow

the complete statement in liquid spill cleanup is 1- Surround the area with barriers, then cover the spill. 2- Scoop up the material and place it in a container.

steps for liquid spill cleanup are:

Identify and assess the type of liquid spilled.

Put on appropriate personal protective equipment (PPE)

Alert others in the area and evacuate if necessary.

Surround the area with barriers, such as caution tape or cones, to prevent anyone from entering the area.

Use absorbent materials, such as sand, clay, or kitty litter, to cover the spill and contain it.

Scoop up the material and place it in a container for proper disposal.

Clean the area with a neutralizing agent if necessary.

Dispose of the waste in accordance with local and federal regulations.

Check for any remaining traces of the spill and clean if necessary.

Document the incident and make sure it is properly reported if required by regulations.

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Answer:

d

Explanation:

Answer:

13.4 mol Ar

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

534 g Ar

Step 2: Identify Conversions

Molar Mass of Ar - 39.95 g/mol

Step 3: Convert

\(534 \ g \ Ar(\frac{1 \ mol \ Ar}{39.95 \ g \ Ar} )\) = 13.3667 mol Ar

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

13.3667 mol Ar ≈ 13.4 mol Ar

Answer:

The number of moles in 452 grams of Argon is 13.31 moles.

Explanation:

The leadership theory most closely matches bryans argument is participative theory. The correct option is b.

A leadership approach known as participatory leadership theory solicits feedback from every employee in the organization.

Before making choices or developing new processes and procedures, the team leader typically solicits feedback and suggestions from their team members.

One of the first conceptual approaches to leadership was provided by the trait theory (also known as the great man hypothesis).

Therefore, the correct option is b. participative theory.

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The incorrect grouping of elements is Argon, potassium, slicon, strontium.

Periodic table is a systematic arrangement of chemical elements within the coloums and rowns on the basis of their properties.

In all options given elements belongs from the same group except the first one, beacuse in argon, potassium, silicon & strontium all are present in different groups of periodic table. As argon is present in the 18th group, potassium is present in the 1st group, silicon is present in the 14th group and strontium is present in the 2nd group of the periodic table.

Hence, correct option is (A).

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1.39 × 10²³ particles CuCr₂O₇

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 64.5 g CuCr₂O₇

[Solve] particles CuCr₂O₇

Step 2: Identify Conversions

Avogadro's Number

[PT] Molar Mass of Cu - 63.55 g/mol

[PT] Molar Mass of Cr - 52.00 g/mol

[PT] Molar Mass of O - 16.00 g/mol

Molar Mass of CuCr₂O₇ - 63.55 + 2(52.00) + 7(16.00) = 279.55 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

1.38944 × 10²³ particles CuCr₂O₇ ≈ 1.39 × 10²³ particles CuCr₂O₇

Answer:

Answer: Energy from the sun.

Explanation:

If you look at the hints it says that it needs something else for a plant to grow and what does a plant need?

Air, Water, and energy from the Sun to make food

Hope this helps :)

Answer:

Energy from the sun

Explanation:

1. If you change the surface area of an alka-seltzer tablet, then the reaction rate will be fastest for the whole tablet of alka-seltzer.

2. If you change the temperature of water, then the reaction rate will be fastest for the tablet of alka-seltzer in the hot water.

3. If you change the volume of water, then the reaction rate will be fastest for the tablet of alka-seltzer in the least amount of water.

1. Changing the surface area of an alka-seltzer tablet will result to a faster reaction rate. This is because the greater the surface area, the more contact the tablet will have with the water, and therefore, the faster the reaction will occur.

2. This is because increasing the temperature of the water increases the kinetic energy of the molecules, which in turn increases the speed of the reaction.

3. This is because the less water there is, the more concentrated the solution is, which allows for more contact between the tablet and the water, resulting in a faster reaction.

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Answer:

21

Explanation:

sffbhvvfcycuxcydghcdeGf you've ydhgc yfyff ygg TX church Uruguay t vitrified

The wave which is having higher frequency is associated with higher energy. In the given wave, the part B is labelling the lowest energy sound.

Sound waves are longitudinal mechanical waves passing through a medium. In a longitudinal wave the oscillation of particles is in a direction along the wave propagation.

A sound wave is composed of rarefactions and compressions. The area where, the particles have some separation with lower  pressure is called rarefactions.

The area of high pressure where, the oscillating particles are closely packed is called compression of the wave. As the frequency of the wave increases, its energy increases, Therefore, the less frequency part B represent lowest energy sound.

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