which phase of matter is the rarest in the solar system

Answer:

the correct choice would be: 4. Reaction rates are not related to spontaneity.

Explanation:

The speed of reaction is independent of spontaneity, since it depends on other factors such as the amount of reagent.

The amount of reagent is one of the variables that most influences the speed of reaction, the greater the amount of reagent, the faster the reaction will be and thus the speed will be increased.

Answer: 9. decomposition 10. single displacement 11. synthesis 12. double displacement

Explanation: just know I know

Answer:

Li2CO3+CaCl2=CaCO3+LiCl

The pH of this solution is approximately 4.74, indicating it is slightly acidic. The presence of sodium acetate, a salt of acetic acid, acts as a buffer and helps maintain the pH of the solution.

The pH of a solution containing\(10^-2\) M acetic acid and 2 x\(10^-2\) M sodium acetate can be determined using a logarithmic concentration diagram.

To determine the pH of the solution, we need to consider the dissociation of acetic acid and the hydrolysis of sodium acetate. Acetic acid (CH3COOH) is a weak acid that partially dissociates in water, releasing hydrogen ions (H+) and acetate ions (CH3COO-).

The dissociation of acetic acid can be represented as follows:

CH3COOH ⇌ H+ + CH3COO-

The equilibrium constant for this dissociation is known as the acid dissociation constant (Ka). The pKa value of acetic acid is approximately 4.74. The pKa is the negative logarithm of the Ka value.

In the given solution, we have both acetic acid and sodium acetate. Sodium acetate (CH3COONa) is a salt that dissociates completely in water, releasing sodium ions (Na+) and acetate ions (CH3COO-). The acetate ions from sodium acetate can react with any additional H+ ions present in the solution through hydrolysis, which helps maintain the pH.

Using a logarithmic concentration diagram, we can determine that the pH of the solution containing \(10^-2\) M acetic acid and 2 x \(10^-2\) M sodium acetate is approximately 4.74, which is slightly acidic.

The presence of sodium acetate acts as a buffer, helping to resist changes in pH by absorbing excess H+ ions or releasing additional H+ ions as needed to maintain the pH within a certain range.

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The line starts at the bottom because it's the starting point. (You have to start somewhere, If that makes sense.)

I also noticed that the line is going up, which means she's going farther (in distance and time)

Answer:

Method: Measure out 25 cm3 of 0.5 mol dm3 lead(II)nitrate solution and add it to a small beaker. Measure out 25 cm3 of 0.5 mol dm3 of potassium sulfate add it to the beaker and mix together using a stirring rod.

Answer:

the 4th food chain i guess

Answer:

The Correct Answer is D

Explanation:

they are all out of order

Explanation:

I don't know how to explain

The reaction that is occurring in this question is:

H2 + I2 -> 2 HI

As we can see, the molar ratio for H2 and I2 is 1:1, one mole of H2 for each mole of I2, and the molar ratio between any reactant and HI is 1:2, which means the number of moles of product will be two times more than the number of moles of the reactants

We have:

3.0 moles of H2

2.0 moles of I2

1.0 moles of HI

According to the molar ratio, we should have the name number of moles of I2 and H2, which means that H2 is in excess and I2 is the limiting reactant with 2 moles

If we have 2 moles of I2, and the molar ratio of I2 and HI is 1:2, we should have 4 moles of HI being produced

Therefore the theoretical number of moles is 4.0 moles of HI from 2.0 moles of I2

The Concentration of Na₃PO₄is decreases due Common ion effect when it is added to a saturated aqueous solution of Ca₃(PO₄)₂ .

Common ion effect:

Common ion effect refers to the reduction in solubility of an ionic precipitate by adding to the solution a soluble compound that has an ion common to the precipitate. This behavior is a result of Le Chatelier's principle of equilibrium ionic association/dissociation reactions.

Solid Na₃PO₄is added to a saturated aqueous solution of Ca₃(PO₄)₂. Ca₃(PO₄)₂ and water are in balance and the products Ca²⁺ and PO₄³⁻.

Ca₃(PO₄)₂ + H₂O --> Ca²⁺+ PO₄³⁻

Na₃PO₄ --> Na⁺ + PO₄³⁻

Na₃PO₄ dissolve into the solution and forming Na⁺ and PO₄³⁻ ions.

the concentration of PO₄³⁻ ions increases, which causes the reaction equilibrium to shift to the left, which makes more Na₃(PO₄), and the concentration decreases.

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Answer: The South American, and African plates moved apart.

Explanation: Due to a divergent (two plates moving away from each other in opposing directions) boundary, and an ocean basin forming between them.

I am not exactly sure if this is the answer you are looking for, but both ionic and molecular compounds require the presence of a nonmetal.

The properties of both ionic and molecular compounds are related to the nature of the bonding metals and nonmetals.

Ionic bonds are formed between metals and non metals. Metals are electron rich and easily loss one or more electrons to electron deficient nonmetals.

The metals gain a positive charge by donating electrons and the nonmetals gain negative charge by withdrawing electrons. The oppositely charged ions attracts electrostatically and form the ionic bond.

Molecular compounds are formed by the covalent bonding between non-metals. Here, the non metals shares their one or more valence electron and forms a bond. They do not furnish any ions and exists as a molecule.

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Answer:

1) 40

2) 2.25 moles

3) 17

4) 120

5) Fe₂O₃

Explanation:

Please see attached picture for full solution.

Answer:

1) \(\boxed{Molar \ mass = 40\ g/mol}\)

2) \(\boxed{No.\ of\ Moles = 1.61 \ moles}\)

3) \(\boxed{Ammonia = 16\ g/mol}\)

4) \(\boxed{Sodium\ Hydrogen\ Sulphate= 120 \ g/mol}\)

5) \(\boxed{Fe_{2}O_{3}}\)

Explanation:

Question # 1:

Using Formula, No. of moles = Mass in grams / molar mass

Where moles = 0.375 mol. , mass = 15 g

=> Molar Mass = Mass in grams / No. of moles

=> Molar Mass = 15 / 0.375

=> Molar mass = 40 g/mol

Question # 2:

No. of moles = Mass in grams / Molar mass

Where Mass = 90 g ,

=> Molar Mass = \(MgO_{2}\)

=> MM = 24 + (16*2)

=> MM = 24 + 32

=> MM = 56 g/mol

No. of Moles = 90 / 56

No. of Moles = 1.61 moles

Question # 3:

Ammonia => \(NH_{3}\)

N has atomic mass 14 ang H has atomic mass 1

Ammonia = (14)+(1*2)

Ammonia = 14+2

Ammonia = 16 g/mol

Question # 4:

Sodium Hydrogen Sulphate => \(NaHSO_{4}\)

Where Na has atomic mass 23, H has atomic mass 1 , sulpher 32 and oxygen 16

\(NaHSO_{4}\) = 23+1+32+(16*4)

=> 56+64

=> 120 g/mol

Question # 5:

The metal which has relative atomic mass of 56 is Iron (Fe)

Given that the oxide contains 70.0 % of Metal

Mass of \(MO_{x}\) (Metal oxide) = 56 / 70 * 100

Mass of \(MO_{x}\) (Metal oxide)  = 0.8 * 100

Mass of \(MO_{x}\) (Metal oxide)  = 80

Mass of x O's = 80 - 56

Mass of x O's = 24

Now, Mass of O = 24 / 16

Mass of O = 1.5

So, Fe Metal and its oxide are in the ratio of

1 : 1.5

×2   ×2

2 : 3

So, the empirical formula of metal with its oxide is \(Fe_{2}O_{3}\)

Answer:

The answer is a) \(C_{4} H_{16} O_{5}\)

Explanation:

The other chemical formulas' subscripts share a common factor, so they can be simplified to an empirical formula, however, the subscripts in  \(C_{4} H_{16} O_{5}\) cannot be simplified any further, because they do not share any more whole-number factors with each other.

Explanation:

Given :

speed of light (c) =

\(3.00 \times 108m/s\)

wavelength (λ) =

\(4.3 \times {10}^{ - 7} \: m\)

Equation :

c = λv

v = c/λ

\(v = \frac{3.00 \times {10}^{8} }{4.3 \times {10}^{ - 7} } \)

Simplify

\(v = 6.976744186 \times {10}^{14} \)

You would need 18 pounds of liquid concentrate to make a 300-gallon emulsion with a 1% concentration.

To determine the amount of liquid concentrate required, we need to calculate the total amount of active ingredient needed for the desired 1% emulsion.

First, let's find the total amount of active ingredient needed in the 300-gallon emulsion:

Total active ingredient = 300 gallons * 1% = 300 * 0.01 = 3 gallons

Next, we need to convert the gallons of active ingredient to pounds. Given that the concentrate has 6 lbs of active ingredient per gallon, we can calculate:

Total active ingredient in pounds = 3 gallons * 6 lbs/gallon = 18 lbs

Therefore, you would need 18 pounds of liquid concentrate to make a 300-gallon emulsion with a 1% concentration.

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Answer:

The flame of the candle looks to go out, but the candle continues to burn. In actuality, the copper wire coil is transferring heat away from the candle flame. The flame returns after the coil of wire is removed.

Explanation:

The pressure of a gas in a lightbulb increases a few minutes after the light is turned on.

Pressure is defined as the force exerted by one substance on another per unit area. The force that perhaps the gas applied in such a way on the jar boundaries is defined as gas pressure. Gas molecules move at random across the given volume.

They come into conflict with the surface as well as each other during this movement. Each individual gas molecule's impact is too small and challenging to visualize. However, the combined impact of all gas molecules encompasses the gas pressure.

The larger the number of collisions, the greater the pressure.The average linear momentum of either a gas's moving molecules is then measured by its pressure. The pressure performs perpendicular to the wall constituent of both forces is determined by the viscosity of the gas.

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Answer: chlorofluorocarbon

Explanation:

chlorofluorocarbon

Answer:

Carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) are greenhouse gases. Chlorofluorocarbons (CFCs) are also considered greenhouse gases, but they are now largely banned due to their damaging effects on the ozone layer.

Explanation:

Answer: Burning natural gas for energy results in fewer emissions of nearly all types of air pollutants and carbon dioxide (CO2) than burning coal or petroleum products to produce an equal amount of energy.

Explanation:

Answer:

Natural gas is a relatively clean burning fossil fuel . Burning natural gas for energy results in fewer emissions of nearly all types of air pollutants and carbon dioxide than burning coal or petroleum products to produce an equal amount of energy.

Explanation:

The balanced equation for the neutralization of hydrochloric acid with aluminum hydroxide is, 3HCl(aq) + Al(OH)₃(s) → AlCl₃(aq) + 3H₂O(l).

The neutralization reaction between hydrochloric acid (HCl) and aluminum hydroxide (Al(OH)₃) can be represented by the following balanced chemical equation,

3HCl(aq) + Al(OH)₃(s) → AlCl₃(aq) + 3H₂O(l)

In this equation, the hydrochloric acid (HCl) is in the aqueous state (indicated by "(aq)"), meaning it is dissolved in water. The aluminum hydroxide (Al(OH)₃) is in the solid state (indicated by "(s)"). When the acid and base react, they form aluminum chloride (AlCl₃) in the aqueous state and water (H₂O) in the liquid state.

This reaction is an example of a neutralization reaction, where an acid and a base react to form a salt and water. The aluminum hydroxide acts as a base, as it can accept hydrogen ions (H+) from the acid, and neutralize the acid. The resulting solution will have a neutral pH, indicating that the acid has been neutralized.

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Answer:0.76 moles NaClO3

Explanation:

moles = M X L

moles = 1.8 M X 0.420 L = 0.756 moles NaClO3  correct sig figs = 0.76 moles

Answer:

10 km/hr

............

The speed of a bicycle is 10 km/hour or 0.27 m/sec.

The speed may be defined as the rate of change of position of an object in any direction. It is significantly measured as the ratio of distance to the time in which the distance was covered.  Speed is a type of scalar quantity that has only direction but no magnitude.

According to the question, the distance traveled by bicycle = 20 km or 2000 meters.

The total time is taken = 2 hours or 7200 seconds.  

Now, the formula for calculating the speed is as follows:

S = Distance/ Time = 20km/2 hours = 10 km/hour.

S = Distance/ Time = 2000 meters/7200 seconds = 0.277 m/sec.

Therefore, the speed of a bicycle is 10 km/hour or 0.27 m/sec.

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Answer:

220g of CO2

Explanation:

Step 1:

The balanced equation for the reaction.

2C5H11OH + 15O2 —> 10CO2 + 12H2O

Step 2:

Determination of the number of mole of CO2 produced by burning 1 mole of C5H11OH.

From the balanced equation above,

2 moles of C5H11OH produced 10 moles CO2.

Therefore, 1 mole of C5H11OH will produce = (1 x 10)/2 = 5 moles of CO2.

Therefore, 5 moles of CO2 is produced from the reaction.

Step 3:

Conversion of 5 moles of CO2 to grams.

Molar mass of CO2 = 12 + (2x16) = 44g/mol

Number of mole of CO2 = 5 moles

Mass of CO2 =...?

Mass = mole x molar mass

Mass of CO2 = 5 x 44

Mass of CO2 = 220g.

Therefore, 220g of CO2 were obtained from the reaction.

Answer:

K I will attempt

Explanation:

a)

\(O_2_{(g)}+ 2H_2_{(g)} => 2H_2O_{(l)}\\\)

b)

1 : 2 : 2 (I don't know if this is what the question wants but it is what I would answer)

c)

Hydrogen because it requires 2 moles of H2 to react with 1 mole of O2

d)

24 moles of water. Look at stoichiometric coefficient. 2:2 means 24 moles you get 24 moles

e)

Oxygen. 2 < 5/2. Remember, 1 mole of O2 requires 2 moles of H2. But 5/2 is still greater than 2

f)

First, let's find out how many moles of water we can get. Since O2 is the limiting reactant, and O2:H2O ratio is 1:2, we will get 4 moles of H2O. Then, we can multiply 4 by Avogadro's number which is \(6.022*10^{23}\) to get the number of molecules. We get: 2.41 * 10^24 molecules of water.

Answer:

I'ma just take the point thank you very much

Answer:

0.5m/s²

Explanation:

Given parameters:

Mass to be pushed  = 300kg

Force  = 150N

Unknown:

Acceleration  = ?

Solution:

To solve this problem, we need to apply newtons second law of motion which is expressed below:

        F = m a

F is the force

m is the mass

a is the acceleration

      150  = 300 x a

        a  = 0.5m/s²

Answer:

C.

Explanation:

Answer:

Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present. Physical properties can be measured without changing a substance's chemical identity

Explanation:

Answer:

yes this above answer is right

Answer:

160 g

Explanation:

The balanced chemical equation is:

S2 + 2O2 → 2SO2

From the equation, we can see that for every 2 moles of O2 used, we produce 2 moles of SO2.

Therefore, for 1 mole of O2 used, we produce 1 mole of SO2.

To find the number of grams of SO2 produced, we need to know the molar mass of SO2, which is approximately 64.06 g/mol.

So, to calculate the mass of SO2 produced from 2.5 moles of O2, we can use the following conversion:

2.5 moles O2 x (2 moles SO2/2 moles O2) x (64.06 g SO2/1 mole SO2) = 160.38 g SO2

Therefore, 160.38 grams of SO2 can be produced if 2.5 moles of O2 are used.