By how much will the speed of a body of fixed mass, increase if its kinetic energy becomes four times its initial kinetic energy?

Answer:

The particles in dry ice overcomes the force of attraction between them to change directly to gaseous state.

Explanation:

Matter exists in three states- solid, liquid and gas. When heated, solid changes to liquid and then gas. However, upon condensation, gas changes to liquid and then to solid. Some solids when heated change directly to vapour without an intermediate liquid state, such vapour will also condense to solid without going through the liquid state. Example includes: ammonium chloride, iodine crystals and sulphur. These solids undergo SUBLIMATION.

Dry ice which is also known as solid frozen carbon dioxide can undergo sublimation when subjected to -78°C. What actually happens to the particles ( molecules) of the frozen carbon dioxide is the existence of weak intermolecular forces between the molecules. Since the molecules are very weakly attracted to each other, frozen carbon dioxide molecules very readily go from the solid state to the gas state at low temperatures.

Answer:

50.96g

Explanation:

Given parameters:

Number of moles of H₃PO₄   = 0.52moles

Unknown:

Mass of the compound  = ?

Solution:

To find the mass of the compound:

    Mass  = number of moles x molar mass of H₃PO₄

Molar mass of H₃PO₄ = 3(1) + 31 + 4(16)  = 98g/mol

  Mass  = 0.52 x 98  = 50.96g

Answer:

Polymerization.

Explanation:

Polymerization can be defined as a type of chemical reaction in which molecules that are relatively small in size chemically combine to form a huge chain of molecules.

Simply stated, polymerization refers to a chemical reaction where two or more smaller molecules react to produce larger molecules of the same network or repetitive structural units.

In polymerization, the relatively small molecules are generally referred to as monomers while the larger molecules they produce are known as polymers.

Polymerization is given by the chemical formula;

nA -----> A(n).

In this scenario, Luis uses a stencil to repeat the same design on each wall to form one long grapevine with a bunch of grapes every foot along its length.

Hence, the type of chemical reaction this best model is polymerization because it involved repeating the same design (monomers) to form a long grapevine with a bunch of grapes (polymers).

Answer:

C.  (Polymerization)

Explanation:

Polymerization is the process by which monomers combine in long strands to form polymers. Since Luis is repeating the same design on each wall, that means he is continuing with the design throughout the room, it is a form of polymerization.

I hope this helps you! :D

Answer:

The answer is B

Explanation:

Answer:

0.6 Ω

Explanation:

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

Voltage (V) = 12 V

Current (I) = 20 A

Resistance (R) =?

From Ohm's law,

V = IR

Where:

V => is the voltage

I => is the current

R => R is the resistance

With the above formula, we can obtain the resistance as follow:

Voltage (V) = 12 V

Current (I) = 20 A

Resistance (R) =?

V = IR

12 = 20 × R

Divide both side by 20

R = 12 / 20

R = 0.6 Ω

Thus the resistance is 0.6 Ω

Explanation:

Elements are pure substances made up of only atoms that all have the same number of protons in their nuclei. Compounds are molecules held together by covalent bonds. Ionic compounds are held together by ionic bonds. Intermetallic compounds are held together by metallic bonds. Certain complexes are held together by coordinate covalent bonds. A mixture is a combination of two or more elements or compounds which haven't bonded yet, so each mixture is it's own.

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Answer:

Magnesium

Explanation:

The element that could provide one atom to make an ionic bond with oxygen is magnesium.

Generally, most group II elements will form an ionic bond with oxygen with just one atom.

An ionic bond forms by the transfer of electrons from one specie to another.

Oxygen has a charge of 2-, to use one atom to form ionic bond with this specie, a magnesium atom with 2+ charge will bond with the specie.

 This will form:

                        MgO

This is notable for other group II elements.

Answer:

Part 1 using forests wisely:

Summarize the scientific information that leads to conservation in each of the articles. People are cutting down trees at a panicking rate. A ton of animals and people live in forests and by taking down trees, is taking down their habitat which is causing them to lose their shelter/living place.

Part 1 community conservartion:

People are destroying the forest which is the Gorillas home. People are also hurting these animals and if people keep doing this the Gorillas can go extinct. Mountain Gorillas are one of humanity’s closest relatives, sharing as much as 99% of our DNA.

Part 2 using forests wisely:

What social issues affected the problem or its solution in each of the stories? If people stop cutting down as many trees, there won’t be as many resources from that such as paper, and the cost may go up. Companies will be mad if people stop them from doing business, for example, cutting down trees. Cutting down trees will allow people to make money but if they don’t then they won’t be able to make as much money.

Part 2 community conservation:

If there aren’t as many Gorillas left the prices for the tourists will rise. That won’t be good for the tourists because then they will have to pay more money and some people don’t have a lot of money so that means that there will be less tourists.

Part 3 community conservation:

How did economics delay scientists' first attempts for conservation in each story?|If people keep killing the Gorillas then there won’t be any Gorillas for the tourists to see. If no tourists come that means that there will be no money for the villagers because the tourists are a big part of the economy there. If there is no money from the tourist then there is going to be no job opportunities for the villagers.

Part 4 community conservation:

Describe the political actions that led to successful conservation in both stories.|The political actions that led to success in the forest industry is what they call a FC company that makes the forest industry true. They make it out of a factory and it can make it very successful and accomplished.

Explanation:

I don't have the answers for using forests wisely for number 3 and 4. I'm sorry

Answer:Radio waves move through the air at the same speed as visible light, Sound waves are mechanical waves all sound waves regardless of there spee or frequency.

Explanation: I got my answer from stemscopes.

Answer:Waves.sry if this is wrong.

Explanation:

Answer:

Electronegativity is the relative ability of an atom involved in covalent bonding to pull electrons toward itself.

Answer:

Electronegativity

Explanation:

Electronegativity is the ability of an atom to attract electron.

Electronegativity increases as it get closer to fluorine since fluorine is the most electronegative element.

Answer:18.5

Explanation:

The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.

Answer:

the theory of plate tectonic state that the plates move due to asthosphere

Answer:

The spaniards are the reason most countries in latin america's main language is spanish

Explanation:

Answer:

58.5g/mol

Explanation:

Given parameters:

Mass of gas  = 4.25g

Volume  = 1.7L

Pressure  = 883mmHg

                760mmHg  = 1 atm

                883mmHg  = [tex]\frac{883}{760}[/tex]   = 1.16atm

Temperature  = 58°C  = 58 + 273  = 331K

Unknown:

Molar mass of sample  = ?

Solution:

To solve this problem, we use the ideal gas equation to find the number of moles;

            PV  = nRT

 P is the pressure

V is the volume

n is the number of moles

R is the gas constant  = 0.082atmdm³mol⁻¹K⁻¹

 T is the temperature

           n  = [tex]\frac{PV}{RT}[/tex]   = [tex]\frac{1.16 x 1.7}{0.082 x 331}[/tex]   = 0.07mole

 Since;

            mass  = number of moles x molar mass

            4.25  = 0.07 x molar mass

 Molar mass  = 58.5g/mol

Answer:

0.11mol/dm³

Explanation:

The reaction expression is given as:

             HCl   +  NaOH  →  NaCl + H₂O

Volume of acid  = 25cm³  = 0.025dm³

Volume of base  = 18.4cm³ = 0.0184dm³

Concentration of base  = 0.15mol/dm³

Solution:

The concentration of hydrochloric acid = ?

 To solve this problem, let us first find the number of moles of the base;

 Number of moles  = concentration x volume

 Number of moles  = 0.15mol/dm³ x 0.0184dm³  = 0.00276mol

From the balanced reaction equation;

          1 mole of NaOH will combine with 1 mole of HCl

Therefore,  0.00276mol of the base will combine with  0.00276mol of HCl

 So;

  Concentration of acid  = [tex]\frac{number of moles }{volume}[/tex]   = [tex]\frac{ 0.00276}{0.025}[/tex]   = 0.11mol/dm³

Answer:

Solubility  = 2.142 x  [tex]10^{-4}[/tex] M

Explanation:

Solution:

Note: This question is incomplete and lacks necessary data to solve this question. But I have found similar question on the internet and fetched the necessary data to solve:

Missing Data:

Number of Moles of N2 dissolved per litre of blood = 5.357 x [tex]10^{-4}[/tex] M

As we know that, the air is approximately. 78 mol % of N2

N2 = 0.78

Partial pressure of the N2 at 100 ft:

Partial Pressure = 0.78 x (4.0)

Partial Pressure = 3.12 atm

Now, this is 4 times the pressure of nitrogen at 1 atm air pressure.

SO,

According to the Henry's Law, we have:

Solubility = k x [tex]P_{g}[/tex]

Here, k = 4 times

So,

Solubility = 4 x (5.357 x [tex]10^{-4}[/tex])

Solubility  = 2.142 x  [tex]10^{-4}[/tex] M

This chicken tastes good

Answer:

A 3 meters

Explanation:

A crest of the wave is the highest peak in the wave that shows the maximum displacement value. The intersection of the 3-meter and 2-meter waves results in amplitude of 1 meter. Thus, option D is correct.

The amplitude of the wave is the measurement of the wave from the still position towards the crest or the trough of the wave. It is estimated in meters.

The elevation of the wave is at 3, and the depression is at 2 meters when intersected, which results in an amplitude causing destructive interference. As 3 m is above the baseline and 2 m is below the baseline the resulting amplitude will be, 3 - 2 = 1 m.

Therefore, the resulting amplitude is 1 meter.

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PRACTICE MULTIPLE CHOICE QUESTIONS FROM UNIT 10

1.) A cylinder is filled with 2.00 moles of nitrogen, 3.00 moles of argon, and 5.00 moles of helium. If

the gas mixture is at STP, what is the partial pressure of the argon?

(A) 152 torr (B) 228 torr (C) 380. torr (D) 760. torr

2.) Compared to the average kinetic energy of 1 mole of water at 0 oC, the average kinetic energy

of 1 mole of water at 298 K is

(A) the same, and the number of molecules is the same

(B) the same, but the number of molecules is greater

(C) greater, and the number of molecules is greater

(D) greater, but the number of molecules is the same

3.) If the pressure on a given mass of gas in a closed system is increased and the temperature

remains constant, the volume of the gas will

(A) decrease (B) increase (C) remain the same

4.) Which gas has approximately the same density as C2H6 at STP?

(A) NO (B) NH3 (C) H2S (D) SO2

5.) At a temperature of 273 K, a 400. milliliter gas sample has a pressure of 760. millimeters of

mercury. If the pressure is changed to 380. millimeters of mercury, at which temperature will

this gas sample have a volume of 551 milliliters?

(A) 100 K (B) 188 K (C) 273 K (D) 546 K

Get the answers to these questions

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Considering the Dalton's partial pressure and STP conditions, the total pressure of argon in the mixture of gases is 0.3 atm.

On one side, the STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

On the other side, the pressure exerted by a particular gas in a mixture is known as its partial pressure.

So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:

[tex]P_{T} =P_{1} +P_{2} + ... + P_{n}[/tex]

where n is the number of gases in the gaseous sample.

Dalton's partial pressure law can also be expressed in terms of the mole fraction of the gas in the mixture.  

So in a mixture of two or more gases, the partial pressure of gas A can be expressed as:

[tex]P_{A} =x_{A} P_{T}[/tex]

In this case, the mole fraction of the argon can be calculated knowing that:

Then:

[tex]x_{argon} =\frac{3 moles}{10 moles} = 0.3[/tex]

So, if the gas mixture is at STP, the total pressure of the gas mixture is 1 atm and the partial pressure of argon can be calculated as:

[tex]P_{argon} =x_{argon} P_{T}[/tex]

[tex]P_{argon} =0.3x 1 atm[/tex]

[tex]P_{argon} =0.3 atm[/tex]

In summary, the total pressure of argon in the mixture of gases is 0.3 atm.

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Answer:

First, a mandatory stoichiometric balance must be made, and second, the degree of purities and impurities that the reagents have must be analyzed to see how many products they would have.

It is essential that this is taken into account since not all chemical compounds (reactants) are 100% pure and therefore their entirety does not become a product.

Explanation:

As for the stoichiometric balance, it is fundamental since if the equation is not balanced all the data will be wrong.

Many times the quantity in grams and another measurement of the products are obtained, taking into account a standard value of how many reactants will give x quantity of products, a simple rule of three could be made and thus be able to determine in a simpler way how many reactants were catalyzed in reaction.

To calculate the specific amount of reactant and product, the stoichiometry method is used.

Stoichiometry is the science of calculating the quantities of components involved in chemical processes.

To understand stoichiometric calculations, first, we balance the equation. To balance an equation, count the number of atoms of the compound on both sides.

If the quantity is not the same, then balance the equation first.

Then, The stoichiometric coefficients' ratio is used to calculate the mole ratio between two components in a chemical process.

We can write mole ratios using these numerical connections, which allow us to translate between amounts of reactants and/or products.

Thus, calculate the stoichiometry problems.

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Answer:

4

Explanation:

earth

wind

water

fire

Answer:

Explanation:

There are total 118 elements in the world.

Answer:

B. 29.76°C

Explanation:

The melting point of each parts will be 29.76°C.

Melting point is the temperature at which a substance changes state from solid to liquid.

This quantity is an intensive property of matter and it does not depend on the quantity of matter therein.

Answer:

False

Explanation:

It’s both living and non living

Answer:

False

Explanation:

In biospheres, there are both living and nonliving objects present! There are typically large abundances of living objects, such as animals, trees, grass, etc. There are also nonliving objects included in biospheres that are necessary for the prosperity of the living creatures! Examples of these nonliving objects include water for hydration, air for breathing, soil for growth, etc. A biosphere is where all living things are found on Earth, so the question is false since both types of things are found within them and not just nonliving things!

Answer:

Molar Mass

Explanation: