A glass column is filled with mercury and inverted in a pool of mercury. The mercury column stabilizes at a height of 729 mm above the pool of mercury. What is the pressure of the atmosphere

The mass of 6.02211023 platinum atoms is 195.08 g.

What is the purpose of platinum?

Jewelry is frequently made of platinum. However, catalytic converters for vehicles, trucks, and buses are where it is primarily used. Each year, this meets around 50% of the need. The conversion of engine emissions into less dangerous waste products is made possible by platinum.

What materials make up platinum?

Six isotopes make up natural platinum: platinum-190 (0.012%), platinum-192 (0.782%), platinum-194 (32.86%), platinum-195 (33.78%), platinum-196 (25.21%), & platinum-198 (7.36 percent). With the exception of platinum-190, that has been described as just a long-lived alpha emitter, all are stable.

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Answer:

The answer is 6.022 * 10^23 atoms

Explanation:

Six and twenty-two thousandths times ten to the twenty-third power atoms.

Answer:

General equation for a double-displacement reaction:  

AB + CD --> AC + BD

• sodium chloride – NaCl copper sulfate – CuSO₄  

NaCl + CuSO₄ --> Na₂SO₄ + CuCl₂

The products formed are sodium sulfate and copper (II) chloride.

Copper (II) chloride forms a blue colored solution.

• sodium hydroxide – NaOH copper sulfate – CuSO₄  

NaOH + CuSO₄ --> Na₂SO₄ + Cu(OH)₂

The products formed are sodium sulfate and copper (II) hydroxide.

Copper (II) hydroxide forms a blue colored solution.

• sodium phosphate – Na₂HPO₂ copper sulfate – CuSO₄  

Na₂HPO₄ + CuSO₄ --> Na₂SO₄ + CuHPO₄

The products formed are sodium sulfate and copper (II) hydrogen phosphate.

Copper (II) hydrogen phosphate forms a blue colored solution.

• sodium chloride – NaCl silver nitrate – AgNO₃  

NaCl + AgNO₃--> AgCl + NaNO₃

The products formed are silver chloride and sodium nitrate.

Silver chloride forms a white precipitate.

• sodium hydroxide – NaOH silver nitrate – AgNO₃  

NaOH + AgNO₃   --> NaNO₃ + AgOH

The products formed are silver hydroxide and sodium nitrate.

Silver hydroxide forms a white precipitate.

• sodium phosphate – Na₂HPO₄ silver nitrate – AgNO₃

Na₂HPO₄ + AgNO₃  --> NaNO₃ +  Ag₂HPO₄

The products formed are sodium nitrate and silver hydrogen phosphate.

Silver hydrogen phosphate forms a colorless solution.

Explanation:

The two possible products in the precipitation reaction of copper (II) chloride and sodium phosphate are copper(II) phosphate and sodium chloride.

The empirical formula of the copper phosphate =\(Cu_3P_2O_8\)

The empirical formula of the sodium chloride = \(NaCl\)

Explanation:

\(3CuCl_2(aq)+2Na_3PO_4(aq)\rightarrow Cu_3(PO_4)_2(s)+ 6NaCl(aq)\)

Charge on the copper(II) ion = +2

Charge on the phosphate ion = -3

The ratio of a number of copper, phosphorus, and oxygen atoms:

\(Cu:P:O=3:2:8= 3:2:8\)

The empirical formula of the copper phosphate =\(Cu_3P_2O_8\)

Charge on the sodium ion = +1

Charge on the chloride ion = -1

The ratio of a number of sodium and chlorine atoms:

\(Na:Cl=1:1=1:1\)

The empirical formula of the sodium chloride = \(NaCl\)

The two possible products in the precipitation reaction of copper (II) chloride and sodium phosphate are copper(II) phosphate and sodium chloride.

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Answer:

It's more like abnormal tissue growth

Explanation:

consider it like a cancer.

Answer:

Coefficients

Explanation:

Balancing a chemical equation entails making sure that the number of atoms on the reactant side equates that on the products side. According to this question, Charlie is trying to balance an equation. She has identified and counted the number of each atoms in the reactants and products side.

However, to ensure that the identified atoms are equal on both sides of the equation, Charlie needs to adjust the COEFFICIENTS of necessary molecules/atoms. Coefficients are numbers used to multiply an algebraic term. For example, 2CO2 means coefficient 2 will be used to multiply each atom in the carbon dioxide molecule. Based on this explanation, the balanced forms of the equations in the question are:

1. FeCl3 + 3NH4OH → Fe(OH)3 + 3NH4Cl

2. CH4 + 2O2 → CO2 + 2H2O

3. 2Fe + 3H2SO4 → Fe2(SO4)3 + 3H2

4. PCl5 + 4H2O → 5HCl + H3PO4

Answer:

57.9g

Explanation:

\(density = \frac{mass}{volume} \)

\(mass = density \times volume\)

mass= 19.3g/cm3 x 3cm3 = 57.9g

Based on the given information, we have a 1.00-L solution containing 2.50×10⁻⁴ M Cu(NO₃)₂ and 1.20×10⁻³ M ethylenediamine (en). The Kf value for Cu(en)₂₂ is 1.00 × 10²⁰.

Based on the given information, we have a 1.00-L solution containing 2.50×10⁻⁴ M Cu(NO₃)₂ and 1.20×10⁻³ M ethylenediamine (en).

The Kf value for Cu(en)₂₂ is 1.00 × 10²⁰.

To find the concentration of Cu(en)₂₂ in the solution,

we can use the formation constant (Kf) equation:

[Cu(en)₂₂] = [Cu2+] * [en]² / Kf

Substituting the given values:

[Cu(en)22] = (2.50×10-4) * (1.20×10-3)^2 / (1.00 × 1020)

Calculating this expression will give you the concentration of Cu(en)22 in the solution.

The Kf value for Cu(en)₂₂ is 1.00 × 10²⁰.

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Answer:

change in color or state of matter

Explanation:

hope i helped! ❤❤

Answer:

When a conversion is necessary, the appropriate conversion factor to an equal value must be used. For example, to convert inches to feet, the appropriate conversion value is 12 inches equal 1 foot. To convert minutes to hours, the appropriate conversion value is 60 minutes equal 1 hour

Explanation:

hope this helps have a good night/day :) ❤

Here m means molality.

To arrange these compounds, first, we must know this:

ΔTb = Kb x m x i

ΔTb = boiling point elevation

kb = 0.52 ºC/m for water (solvent) we assume that our solvent is water, the same for the 4 solutions between solutes and water.

m = the same for the 4 of them

i = Van't Hoff factor = number of particles into which the solute is dissociated.

"i" will change for all the cases.

For 0.50 m KCl)

KCl ==> k+ + Cl-, so i = 2 (2 ions)

For 0.5 m C6H6O6)

i = 1 (C6H6O6 doesn't dissociate)

For 0.5 m Fe(NO3)3)

Fe(NO3)3 ===> Fe+3 + 3 NO3-

i = 4 (4 ions)

For 0.5 m Na2SO4)

Na2SO4 ==> 2 Na+ + SO4-2

i = 3

According to ΔTb = Kb x m x i, the only factor that changes is "i", so it will give the order of increasing boiling point elevation of these compounds:

Answer:

0.5 m C6H6O6 < 0.50 m KCl < 0.5 m Na2SO4 < 0.5 m Fe(NO3)3

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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The images of the ionic bonds of the compounds is shown in the image attached.

If we are talking about the ionic bonding model, what we mean is that in this kind of bonding. there is the transfer of electrons from the metals to the non metals. In this process, the metal would be positively charged while the non metal would be negatively charged.

As such, in the case of the potassium bromide, we can see from the image that electrons are transferred from potassium to bromine while electrons are transferred from aluminum to chlorine.

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The correct numbers and symbol of elements represented by X are: (1). calcium (2). 18 (3) 15

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Answer: 5

Explanation:

The dissociation constants for the acids A, B and C are 10⁻³, 10^9.6 and 10² respectively. The strongest acid is Acid C.

The dissociation constants for the given acids are given as:pKa

a = 3.0Ka

a = 10⁻³

pKa b = 9.60Ka

b = 10^-9.60pKa

c = -2.0Ka

c = 10²

The strongest acid is the one with the highest Ka value which is Acid C. The reason being, higher the value of Ka (Dissociation constant), higher is the dissociation of the acid. And as we can see, Acid C has the highest dissociation constant value or the highest Ka value of 10².

The expression of the dissociation constant for any acid is given as:

Ka = [H+][A-]/[HA]where,

[H+]= the concentration of the hydrogen ions

[A-]= the concentration of the anions

[HA]= the concentration of the undissociated acid

Dissociation of acids can be measured by calculating its acid dissociation constant (Ka).

Ka is the measure of the strength of an acid. It is used to show how readily an acid gives up a hydrogen ion (H+) when dissolved in water.

In this case, we have calculated the dissociation constants for the acids which are as follows:

Ka a = 10⁻³

Ka b = 10^9.6

Ka c = 10²

Therefore, the order of strength of the acids is: Acid C > Acid A > Acid B

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Combustion analysis of fluorene, a polycyclic aromatic hydrocarbon used to make dyes, plastics, and pesticides, produces 11.44 g CO2 and 1.80 g H2O. The empirical formula of fluorene C₆H₄.

CₓHₐ + O2 → CO2 + H2O Since the combustion is complete, so the total mass of the reactants is equal to the total mass of the reactants Therefore, Mass of O2 = (17.9 + 9.14) – 5.9 = 21.14 grams Here, the empirical formula for the hydrocarbon is CₓHₐ. So, now we have to need to determine the number of moles of the O2, CO2, and H2O :- Mole of CO2 = 17.9/44 = 0.4068 Mole of H2O = 9.14/18 = 0.5078 Mole of O2 = 21.14/32 = 0.6606. The empirical formula for the compound containing uranium and fluorine is UF6. Explanation: The empirical formula of a compound represents the lowest whole number ratio of elements in the compound. This ratio is represented by subscripts in the formula. by this information, we can consider that combustion analysis of fluorene, a polycyclic aromatic hydrocarbon used to make dyes, plastics, and pesticides, produces 11.44 g CO2 and 1.80 g H2O. The empirical formula of fluorene C₆H₄.

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Answer:

An indication of calories consumed during anaerobic energy production

Explanation:

RER stands for respiratory exchange ratio, which is the ratio of the volume of carbon dioxide, CO₂, produced to the volume of oxygen, O₂ used in metabolism. RER is used in determining the respiratory quotient during aerobic exercise and rest, from which it can be determined if carbohydrate or fat is the source of fuel consumed in the production of energy for the body through metabolism

Therefore, the answer that is not correct is an indication of calories consumed during anaerobic energy production

When 20.0 g of propane C₃H₈ is burned with excess oxygen, 54.0 g of water will be produced.

To determine the amount of water produced, we need to consider the balanced chemical equation for the combustion of propane:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

From the balanced equation, we can see that for every 1 mole of propane (44.1 g), 4 moles of water (72.0 g) are produced.

To calculate the amount of water produced from 20.0 g of propane, we can set up a proportion:

(20.0 g propane) / (44.1 g propane) = (x g water) / (72.0 g water)

Solving for x, the grams of water produced, we can cross-multiply and divide:

x = (20.0 g propane) × (72.0 g water) / (44.1 g propane) ≈ 32.9 g water

Therefore, when 20.0 g of propane is burned, approximately 32.9 g of water will be produced.

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Answer:

5g NaOH

Explanation:

Answer:

P and Q

Q and R

Explanation:

To begin, we must bear in mind the meaning of isotope.

Isotopes are atoms having the same atomic number (i.e proton) but different mass number due to the difference in the neutron number present in the atoms involved.

Thus, we shall write out the number of protons, neutrons and electrons present in the model given above. This is given:

Model P:

Proton = 12

Neutron = 13

Electron = 13

Model Q:

Proton = 12

Neutron = 12

Electron = 13

Model R:

Proton = 12

Neutron = 13

Electron = 12

From the above data, we can say that:

1. P and Q are isotope since they have different Neutron number.

2. P and R are not isotope since they have the same Neutron number.

3. Q and R are isotope since they have different Neutron number.

Answer:

Testing prototypes is an inherent part of finalizing designs. Nobody wants to wonder why users are not utilizing an app the way it should be utilized or why they can’t seem to complete a purchase on your website. And nobody wants to rework something that’s already been shipped. 

Conducting tests as early as the prototyping stage can help you avoid these unfortunate scenarios. User research with Qualaroo can help you validate your current design and uncover new areas of focus for the next iteration. Use Qualaroo to understand how people use your interface early on in the design process and evolve your prototype into a working product faster.

moms home  a hole

hope your happy about the poop youve done

Answer:

False because it is chemical change

Answer:  B) sand and water

Explanation:

because when you  mix sand and water the sand does not dissolve in the water

Answer:

i really don't know

Explanation:

but if you got an answer please let me know ty:)

Answer:

ver explicacion

Explanation:

El elemento que tiene el número atómico 56 en la tabla periódica del bario. El bario es un elemento del grupo dos.

Se combina con el cloro para formar cloruro de bario. que tiene la fórmula BaCl2 de acuerdo con la valencia de ambos elementos.

El cloruro de bario es un compuesto iónico.

The Haber process is an industrial process that converts nitrogen gas (N2) and hydrogen gas (H2) into ammonia (NH3) under high temperature and pressure conditions. The process is named after its inventor, Fritz Haber.

An increase in temperature in the Haber process will generally increase the rate of the reaction, as the kinetic energy of the reactant molecules increases, allowing them to collide more frequently and with more energy, increasing the chances of successful collisions and formation of products.

However, as the temperature increases, the equilibrium position of the reaction will shift towards the reactants side. This will decrease the yield of the desired product, ammonia.

Additionally, the high temperatures used in the Haber process can cause thermal decomposition of the ammonia, further reducing the yield of the desired product.

It's worth noting that, the Haber process is usually run at about 400-450°C and 200-250 atmospheres pressure, to reach an optimal yield and efficiency. Operating the process at a higher temperature than this range would decrease the efficiency and yield of the process.

According to Avogadro`s law, the volume of gas is directly proportional to number of moles of gas.

This law mathematically can be written as:

                                          V  ∝  n

                                          V  =  K n

                                          V/n =  K

Where V represents the volume of gas

          n  represents the number of moles of gas

           k is proportionality constant at a given temperature and pressure

This law explains that how equal volumes of all gases contain the same number of molecules when the temperature and pressure are the same. Similarly, this  law can be used to compare the same substances under two different sets of circumstances.

                                        V₁ / n₁  =   V₂ / n₂

This equation shows that the volume of the gas increases proportionally to the amount of number of moles of gas. Similarly, if the amount of gas decreases result in decrease in number of moles. As a result, neither the size of the molecules nor the molar mass of the gas affects how many atoms or molecules there are in a given volume of an ideal gas.

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The information needed to calculate the gravitational force acting on an object is the mass of the object and the gravitational acceleration. Option 2.

The gravitational force is a force that acts on objects as a result of their mass. It is the force of attraction of all masses in the universe. Thus, an object and the earth or another object will always have a force of attraction acting between them.

The gravitational force acting on an object is given by the mathematical expression of Newton's law:

F = ma

Where:

F = force

m = mass of the object

a = gravitational acceleration

Thus, in order to calculate the gravitational force of an object, both the mass of the object and gravitational acceleration are needed.

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Answer:

1)  the mass of the object and the planet’s gravitational acceleration

2)  2.6 times less force

3)  The Earth has a greater gravitational attraction than the Moon.

4)   980 N

5)  The force would need to be greater, so they would not perform as well.

Answer:

Q = 5949.35 J

Explanation:

Given that,

The mass of water, m = 189.5 grams

Initial temperature, T = 16.4 °C

Final temperature, T' = 8.9°C

We need to find the thermal energy the water use to melt the ice cube. The thermal energy is given by :

\(Q=mc\Delta T\)

Where

c is the specific heat of the water, c = 4.186 joule/gram °C

So,

\(Q=189.5\times 4.186 \times (8.9-16.4)\\Q=-5949.35\ J\)

So, the required amount heat is equal to 5949.35 J.

Answer:

whether an element id radioactive