If a gold bar is 16,000 g mass and 800 cm^3 volume what is the density?

Answer:True

Explanation:

There is 5 different type of layers i think

Answer:

true I'm pretty sure sry if I get it wrong

The statement that best describes the cell condition supporting Na+ sequestration in the vacuole is option B: Na+ sequestration can occur if the concentration of protons (H+) in the cytoplasm is less than the concentration of protons (H+) in the vacuole.

Option B accurately describes the condition that enables Na+ sequestration in the vacuole. In plant cells, the vacuole plays a crucial role in ion homeostasis by actively transporting ions such as Na+ into its lumen, maintaining a lower concentration of Na+ in the cytoplasm compared to the vacuole.

This sequestration process relies on proton pumps present in the vacuolar membrane, which actively transport protons (H+) from the cytoplasm into the vacuole, creating an electrochemical gradient. The higher concentration of protons (H+) in the vacuole creates an electrochemical potential that facilitates the uptake of Na+ ions.

By maintaining a lower concentration of protons (H+) in the cytoplasm relative to the vacuole, the cell can drive Na+ ions into the vacuole against their concentration gradient, effectively sequestering them and preventing their accumulation in the cytoplasm.

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The pressure of the gas in the container when the volume is 132.5 mL is 465.54 torr (rounded to the nearest 0.01) with units of torr.

To solve this question, we can use the ideal gas law equation, PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the universal gas constant, and T is the temperature. Since the sample of neon is at a constant temperature and the number of moles of gas is constant, we can use the equation P1V1 = P2V2, where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.
Using the given values, we can write:
P1V1 = P2V2
(757.2 torr) x (81.4 mL) = P2 x (132.5 mL)
Solving for P2, we get:
P2 = (757.2 torr x 81.4 mL) / 132.5 mL
P2 = 465.54 torr
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A substance's molar mass is the mass in grams of one mole of the compound. A mole is the number of entities present in a substance, such as atoms, molecules, or ions. A mole of any substance is defined as 6.022  × 10²³  molecules.

0.578 moles of water contains 3.45 × 10²³  molecules.

1 mole contains 6.022 × 10²³ molecules

0.578 moles of water contains 0.578 ×  6.02  × 10²³ molecules

= 3.45 × 10²³ molecules.

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Answer:

b

Explanation:

So, it will take approximately 83.57 minutes for the reaction to be 85% complete if the reaction is zero order.

The given problem states that a reaction is 35% complete in 45.0 minutes and asks for the time it will take for the reaction to be 85% complete, assuming the reaction is zero order.

In a zero-order reaction, the rate of the reaction is independent of the concentration of the reactant. This means that the reaction proceeds at a constant rate, regardless of how much reactant is left.

To find the time it will take for the reaction to be 85% complete, we need to determine the amount of time it takes for the reaction to progress from 35% to 85% complete.

Let's break it down step by step:

1. We know that the reaction is 35% complete after 45.0 minutes. This means that 35% of the reactant has been consumed in that time.

2. To find the remaining reactant after 45.0 minutes, we subtract 35% from 100%. This gives us 65% remaining.

3. Since the reaction is zero order, the rate of the reaction is constant. Therefore, the time it takes for the reaction to progress from 35% to 85% complete will be the same as the time it took for the reaction to progress from 0% to 65% complete.

4. To find the time it takes for the reaction to progress from 0% to 65% complete, we can set up a proportion:

  (Time for 35%)/(Amount of reactant consumed for 35%) = (Time for 65%)/(Amount of reactant consumed for 65%)

  Let's denote the time it takes for the reaction to progress from 0% to 65% as 't'. Since the reaction is zero order, the amount of reactant consumed is directly proportional to time.

  Therefore, we can write the proportion as:
  45.0 min / 35% = t / 65%

5. Solving the proportion, we can cross-multiply and divide:
  (45.0 min) * (65%) = (35%) * (t)
  29.25 min = 0.35t
  t = 29.25 min / 0.35
  t ≈ 83.57 min

So, it will take approximately 83.57 minutes for the reaction to be 85% complete if the reaction is zero order.

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Answer:Autosomes

They are called autosomes. They are the same for those born with XY and XX chromosomes, but after 22 they change.

A tablet weighing 0.940 g was dissolved in dilute sulphuric acid made up to 250 cm³ with water. 25.0 cm³ of this solution was titrated with 0.00160 M K\(_2\)Cr\(_2\)O requiring 32.5 cm3 of the  K\(_2\)Cr\(_2\)O. 4.17% is the percentage by mass of  \(Fe^{2+}\) in the tablet.

Mass percent is a means to describe a component in a specific combination or to convey a concentration. The mass percentage used to describe the solution composition indicates the mass of solute contained in a given mass of solution. The solute's concentration is specified in terms of mass or moles.

6\(Fe^2+\) + \(Cr_2O_7^{2-}\) + 14\(H^+\) → 6\(Fe^{3+}\) + 2\(Cr^{3+}\)+ 7H\(_2\)O

32.5 cm³x 0.00160 M = 0.052 g of K\(_2\)Cr\(_2\)O\(_7\)

0.052 g / 294.18 g/mol = 0.000177moles of K\(_2\)Cr\(_2\)O

0.000177 mol / 6 = 0.0000295 mol moles of \(Fe^{2+}\)

0.0000295 mol / 0.025 L = 0.00118 M  of  \(Fe^{2+}\)

0.00118 M x 55.845 g/mol x 0.025 L = 0.0392 g of  \(Fe^{2+}\)

0.0392 g / 0.940 g x 100% = 4.17% percentage by mass of  \(Fe^{2+}\)

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A homogeneous mixture, also known as a solution, is a liquid mixture where one or more substances are combined in such a way that they cannot be separated by filtering or allowing the mixture to stand. Unlike heterogeneous mixtures, such as suspensions or colloids, homogeneous mixtures have uniform composition and properties throughout.

The different substances in a homogeneous mixture are evenly distributed at a molecular or atomic level, resulting in a single phase.

This uniform distribution makes it challenging to visually differentiate the individual components of the mixture.

Examples of homogeneous liquid mixtures include saltwater, vinegar, and ethanol-water solutions.

The inability to separate the components of a homogeneous mixture by simple physical means is due to the intimate mixing and molecular interactions between the substances involved.

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Answer:

The correct answer is 5021.25 kJ/mol octane

Explanation:

The heat absorbed by the calorimeter is given by:

heat absorbed = Ccal x ΔT

Given:

Ccal = 6.18 kJ/ºC (heat capacity of calorimeter)

ΔT= Final temperature - initial temperature = 41.5ºC-22.0ºC = 19.5ºC

We first calculate the heat absorbed:

heat absorbed = 6.18 kJ/ºC x 19.5ºC = 120.51 kJ

The change in internal energy (ΔE) is equal to the heat absorbed by the calorimeter. In order to determine ΔE in kJ/mol we have to divide the heat into the number of moles of octane (C₈H₁₈) burned in the calorimeter.

Molecular weight (C₈H₁₈) = (12 g/mol x 8) + (1 g/mol x 18) = 114 g/mol

Moles of C₈H₁₈= mass/molecular weight= (2.75 g)/(114 g/mol)= 0.024 moles

Finally, we calculate ΔE:

ΔE = heat absorbed/moles of octane = (120.51 kJ)/(0.024 mol octane) = 5021.25 kJ/mol octane

The change will correctly effect the model of the electron transport system above simply is to switch H₂O and O₂ ( Water and oxygen ).

The correct answer choice is option c.

It happens that oxygen react with 2 different electrons from the transport chain and 2 hydrogen in order to produce water molecules in the process.

Electron transport chain simply refers to a protein complex redox reactions which result in the production of ATP molecules. In this whole process of forming ATP, the electrons in the chain carried by the NADH, FADH2 and H+· are transferred to oxygen atom.

In conclusion, for an effective change to occur in the above electron transport system, there needs to be a switch of water and oxygen molecules

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Answer :Switch H2O and O2.

Explanation: edgenuie 2022-23

Answer:

The change from a liquid phase to a gaseous phase occurs when the vapor pressure of the liquid is equal to the atmospheric pressure exerted on the liquid.

Explanation:

Boiling is a physical change and molecules are not chemically altered during the process.

Answer:

calcium cation

Formula and structure: The chemical formula of calcium chloride is CaCl2, and its molar mass is 110.983 g/mol. It is an ionic compound consisting of the calcium cation (Ca2+) and two chlorine anions (Cl-).

Explanation:

The question requires us to choose the best option to explain why bubbles rise faster from a warm can of soda than a cold can, based on the solubility of gases in liquids.

Adding heat to a solution composed of a liquid and a gas (i.e., increasing its temperature) provides thermal energy to the gas that makes it possible to overcome the forces that maintain molecules of solvent (liquid) and solute (gas) together. In this way, the molecules of solvent and solute tend to separate, therefore decreasing the solubility of the gas. Based on this, we can say that the solubility of gases in liquids increase with increasing temperature.

Therefore, the best option to answer the question is the first one, "gases become less soluble in liquids at higher temperatures".

The number of moles of gas is the same on both sides, the change in volume will not affect the equilibrium position of the reaction. The answer is B) There is no change because there are the same number of moles of gas on both sides.

To determine the change that will occur when the container is shrunk from 9.0 L to 3.0 L for the given reaction:

51.8 kJ + H₂(g) + I₂(g) → 2HI(g)

We need to consider the number of moles of gas on each side of the reaction.

On the left side, there are 2 moles of gas (H₂ and I₂), while on the right side, there are 2 moles of gas (2HI). Both sides have an equal number of moles of gas.

Therefore, the correct answer is B) There is no change because there are the same number of moles of gas on both sides.

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The term that describes what she is measuring is called partial pressure.

From the Dalton's law of partial pressure, the total pressure of a gas is regarded as the sum of the partial pressures of all the gases in the mixture.

As such, each of the gases; carbon dioxide, oxygen, and nitrogen all possess partial pressures thus the term that describes what she is measuring is called partial pressure.

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When considering the two reactions of ag+(aq), it is important to note that the reaction rates are dependent on various factors, such as temperature, concentration, and presence of catalysts.

However, without any specific information on these factors, it can be assumed that the relative rates of the two reactions will be determined by their respective reaction mechanisms.If the two reactions have similar reaction mechanisms, then their rates will likely be similar. On the other hand, if the mechanisms differ, then the rates will likely vary. For example, if one reaction involves a single-step mechanism while the other involves multiple steps, the former will likely have a faster rate.


In summary, the relative rates of the two reactions of ag+(aq) will depend on their respective reaction mechanisms, and without further information, it is difficult to determine which reaction will have a faster rate.

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P-aminophenol has a molar mass of 109.13 g/mol. Acetaminophen has a molar mass of 151.17 g/mol. Acetic anhydride has a capacity of 1.1 mL.

The mass of acetaminophen, stated as 0.157g, must be multiplied by the molar mass of acetaminophen to get the theoretical yield. It weighs 151.2g in this case. The theoretical yield thus becomes 0.217g.

A measurement called production yield is obtained by dividing the number of high-quality parts produced by the total number of parts started in production.

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Answer:

1

4

5

6

Explanation:

all magnets have opposite poles (north and south)

magnetic domains are aligned

moving electrons generate a magnetic filed

movement of electrons creates a magnets field

attracted to iron, nickel and cobalt

The original concentration of the sodium oxalate was 0.0675 M.

The balanced equation for the reaction between potassium permanganate (KMnO₄) and sodium oxalate (Na₂C₂O₄) is:

5 C₂O₄²⁻ + 2 MnO₄⁻ + 16 H⁺ → 2 Mn²⁺ + 10 CO₂ + 8 H₂O

From the balanced equation, we can see that 5 moles of sodium oxalate react with 2 moles of potassium permanganate. Therefore, the number of moles of potassium permanganate used in the titration is:

n(KMnO₄) = M(KMnO₄) x V(KMnO₄) = 0.1500 M x 22.30 mL x (1 L/1000 mL) = 0.003345 moles

Using the stoichiometry of the balanced equation, we can determine the number of moles of sodium oxalate that reacted:

n(Na₂C₂O₄) = (5/2) x n(KMnO₄) = (5/2) x 0.003345 moles = 0.008362 moles

Finally, we can calculate the concentration of the original sodium oxalate solution:

M(Na₂C₂O₄) = n(Na₂C₂O₄) / V(Na₂C₂O₄) = 0.008362 moles / 10.00 mL x (1 L/1000 mL) = 0.0675 M

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Answer:

just a few days later this morning and Video is a bit more than

Explanation:

free fire in a good place for me to do it all in a great time for

Answer:

108.32

Explanation:

dalton's law

Pgas1 = x1 * Ptotal

Pgas1 = (mole fraction of a gas) * Ptotal

Ptotal = (mole fraction of a gas) ÷ Pgas1

1 torr = 0.133 kpa kilopascal

The volume of Neon gas is 326.5 L in 8. 9 * 10 ^ 25 atoms as per the ideal gas law equation.

The given atoms of Neon gas =  8. 9 * 10 ^ 25

To calculate the volume of any gas we should use the ideal gas law equation.

PV = nRT

Here R is the universal gas constant.

To calculate the volume, we need to calculate the number of moles of neon gas. Avogadro's number is used to convert the number of atoms to moles:

1 mole of neon gas = 6.022 * 10^23 atoms of neon gas

The total number of moles of neon gas is:

8.9 * 10^25 atoms / 6.022 * 10^23 atoms/mol = 14.79 mol

Let's assume the temperature is 25°C  = 298 K

The pressure = 1 atm.

The value of R =  0.08206 Latm/(molK).

PV = nRT

V = (NRT) / P

V = (14.79 mol * 0.08206 Latm/(molK) * 298 K) / 1 atm

V = 326.5 L

Therefore we can conclude that the volume of Neon gas is 326.5 L.

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To prepare a 0.650 M NaOH solution by dilution, option 4) is the correct choice, using 574 mL of 6.60 M NaOH and adding water to reach a total volume of 402 ml in case of volume.

The volume of a solution is increased while the solute concentration (NaOH) is maintained constant to dilute it. C1V1 = C2V2, where C1 and V1 represent the starting concentration and volume, and C2 and V2 represent the ultimate concentration and volume, is the dilution formula.

We can set up the equation as (6.60 M)(574 mL) = (0.650 M)(402 mL), where the target concentration is 0.650 M and the beginning concentration is 6.60 M. We determine that 402 mL of the 6.60 M NaOH solution needs to be used after solving for the unknown volume.

In order to achieve the necessary concentration of 0.650 M, option 4 specifies the right amounts of 574 mL of the 6.60 M NaOH solution and 402 mL of water.

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The symmetries that are consistent with a two-dimensional crystal include translation; 1-, 2-, 3-, 4-, and 6-fold rotations; reflection and glide.

Therefore, the answer is option C: Translation; 1-, 2-, 3-, 4- and 6-fold rotations; reflection and glide.

Two-dimensional crystals consist of two-dimensional lattices that can be defined by their symmetries.

They have five fold and higher rotation axes prohibited by the crystallographic restriction theorem.

The seven crystal systems and the fourteen Bravais lattices can be used to classify two-dimensional lattices based on their symmetries. All seven crystal systems have been found in two-dimensional lattices.

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Answer: it’s not A3X3

Explanation:

1. AX

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Answer:

–1065.25 KJ of energy.

Explanation:

From the question given above, the following data were obtained:

4FeO + O₂ —> 2Fe₂O₃  ΔH = –560.66 kJ

From the balanced equation above,

The formation of 2 moles of Fe₂O₃ released –560.66 kJ of energy.

Finally, we shall determine the amount of heat energy released when 3.8 moles of Fe₂O₃ are produced. This can be obtained as follow:

From the balanced equation above,

The formation of 2 moles of Fe₂O₃ released –560.66 kJ of energy.

Therefore, the formation of 3.8 moles of Fe₂O₃ will release

= (3.8 × –560.66)/2 = –1065.25 KJ of energy.

Thus, –1065.25 KJ of energy is released from the reaction.

9.  The slope for the given equation 3- y ≤ -5x is 5 and intercept is 3.

Slope-intercept form (y=mx+b) of linear equations highlights the slope (m) and y-intercept (b) of line. The slope intercept formula y = mx + b is used when you know the slope of line that is to to be examined and point given is also the y intercept (0, b). In this formula, b represents y value of the y intercept point.

The slope intercept for of linear equation is: y = mx +b

m is slope and b is y intercept.

So, y = 5x + 3

Now m = 5 ; so the slope is 5

b = 3 ; hence y-intercept is 3

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The volume of the stock solution required to make the required solution is 48.112 ml.

To calculate the volume of the stock solution needed to make the required solution, we can use the equation:
m_i v_i = m_f v_f
Where:
m_i = initial concentration of the stock solution
v_i = volume of the stock solution to be used
m_f = final concentration of the required solution
v_f = final volume of the required solution

We have the following values:
m_i = concentration of the stock solution = unknown
v_i = volume of the stock solution to be used = unknown
m_f = final concentration of the required solution = 0.900 ml
v_f = final volume of the required solution = 6.94 ml

Plugging in the values into the equation and solving for v_i, we get:

v_i = (m_f * v_f) / m_i
v_i = (0.900 ml * 6.94 ml) / m_i

Now, we need to find the value of m_i to solve for v_i. We can use the given values of volumes to find the concentration of the required solution:

m_f = (0.900 ml / 6.94 ml) = 0.1299 ml/ml

Substituting this value into the equation and solving for v_i, we get:

v_i = (0.900 ml * 6.94 ml) / m_i
v_i = (0.900 ml * 6.94 ml) / 0.1299 ml/ml
v_i = 48.112 ml

Therefore, the volume of the stock solution required to make the required solution is 48.112 ml.

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Answer:

To make sure all the sulphuric acid has been used up