How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen?
O 1 mol of oxygen has fewer molecules.
O 1 mol of oxygen has more molecules.
O Each sample has the same number of molecules.
O The molecules cannot be compared without knowing the mass.

Answer:

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Step 6: Evaluate the outcome

Answer: 0.5 M

Explanation:

molarity = (moles of solute)/(liters of solution)

Hence, the molarity is (0.234)/(0.5) = 0.5 M (to 1 s.f.)

Answer:

Known for his law of gases, Boyle was a 17th-century pioneer of modern chemistry. Every general-chemistry student learns of Robert Boyle (1627–1691) as the person who discovered that the volume of a gas decreases with increasing pressure and vice versa—the famous Boyle's law.

Answer:

Complete combustion occurs when there is enough oxygen to completely use up all the reactants. Incomplete combustion occurs when there is not enough oxygen resulting in the production of smoke, and less energy is produced when compared with complete combustion.

Answer:

Gamma rays

Since they have high penetrating power.

Answer:

A

Explanation:

Answer:

B

Explanation:

Recall the ideal gas law:

[tex]\displaystyle PV = nRT[/tex]

Because n, R, and T remain constant, we can rewrite the equation as:

[tex]\displaystyle k = P_1V_1 = P_2V_2[/tex]

Where k is some constant. This form of the ideal gas law is referred to as Boyle's Law.

Substitute and evaluate:

[tex]\displaystyle \begin{aligned} (4.0\text{ L})(12\text{ atm}) & = (3.0\text{ atm})V_2 \\ \\ V_2 & = 16\text{ L} \end{aligned}[/tex]

In conclusion, the answer is B .

The percentage yield of oxygen obtained from the reaction, given that 400 g of potassium chlorate was heated is 73.4%

2KClO₃ —> 2KCl + 3O₂

Molar mass of KClO₃ = 122.5 g/mole

Mass of KClO₃ from the balanced equation = 2 × 122.5 = 245 g

Molar mass of O₂ = 32 g/mole

Mass of O₂ from the balanced equation = 3 × 32 = 96 g

SUMMARY

From the balanced equation above,

245 g of KClO₃ decomposed to produce 96 g of O₂

From the balanced equation above,

245 g of KClO₃ decomposed to produce 96 g of O₂

Therefore,

400 g of KClO₃ will decompose to produce = (400 × 96) / 245 = 156.7 g of O₂

Percentage yield = (Actual /Theoretical) × 100

Percentage yield = (115 / 156.7) × 100

Percentage yield = 73.4%

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Answer:

B. 73.40%

Explanation:

I AM JUST HIM

Answer:

Explanation:

Dinitrogen trioxide is a nitrogen oxide. Nitrogen trioxide appears as a blue liquid with a sharp, unpleasant chemical odor.

Description: Dinitrogen trioxide is a nitrogen oxide.ChEBINitrogen trioxide appears as ...

Synonyms: Dinitrogen trioxideNITROGEN TRIOXIDENitrogen oxide (N2O3)10544-7...

Molecular Formula: N2O3

Molecular Weight: 76.012 g/mol

Answer:

It is called Dinitrogen trioxide. Hope this helps!

Answer:

hi the answer is C

Explanation:

hope i helped :)

Answer:

be more susceptible to disease and famine

Explanation:

Answer:

If a saturated solution is heated to a higher temperature, it becomes unsaturated. Hence, the saturation point of a solution increases with the increase in temperature as there is an increase in solubility of the solute.

Explanation:

I hope this is able to help you! Please feel free to give feedback :)

Answer:

s= 3.20 mph

Explanation:

s=t/d

s=380miles/5hours

Taking into account the definition of wavelength, frecuency and propagation speed:

The equation that illustrates the relationship between wave velocity, frequency, and wavelength is v = f×λ.

Wavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. It is expressed in units of length (m).

On the other side, frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).

Finally, the propagation speed is the speed with which the wave propagates in the medium, that is, it is the magnitude that measures the speed at which the wave disturbance propagates along its displacement.

The propagation speed relate the wavelength (λ) and the frequency (f) inversely proportional using the following equation:

v = f×λ

All electromagnetic waves propagate in a vacuum at a constant speed of 2,998 x 10⁸ m / s, the speed of light.

Therefore, the previous expression establishes an inversely proportional relationship between the frequency and the wavelength: The higher the frequency, the lower the wavelength and when the frequency is lower, the greater the wavelength.

In summary, the definition of frequency, wavelength and velocity are:

Finally, the equation that illustrates the relationship between wave velocity, frequency, and wavelength is v = f×λ.

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Explanation:

Critics of evolution commonly appeal to past scientific hoaxes such as the Piltdown Man forgery. It is argued that because scientists have been mistaken and deceived in the past about evidence for various aspects of evolution, the current evidence for evolution is likely to also be based on fraud and error.

Anders Celsius made the centigrade thermometer.

Answer:

Cu (s)  and AlCl₃ (s)

Explanation:

This reaction can be classified as a single-displacement reaction, aka. a single-replacement reaction. These reactions involve one element swapping out another element in a compound. In this reaction, aluminum is taking the place of copper (ii) in the copper (ii) chloride compound. Aluminum takes the place of copper (ii) specifically because aluminum is more likely form a cation than anion. Copper (ii) serves as a cation in the compound.

Al (s) + CuCl₂ (s) --> Cu (s) + AlCl₃ (s)

The final products are copper (ii) metal and aluminum chloride. The metal of copper (ii) is produced instead of the cation in order to maintain the neutral charge balance of the reaction. The chorine has a subscript of 3 because aluminum usually forms cations of a +3 charge while chlorines form anions with a -1 charge.

The balanced equation is:

2 Al (s) + 3 CuCl₂ (s) --> 3 Cu (s) + 2 AlCl₃ (s)

The planet Saturn rotates much more rapidly than earth, this would affect the length of Saturn's day and night.

Day and night occur on any planet due to the rotation of the planet in its own axis with respect to the position of the sun.

As speed of planet Saturn is much more as compared to the speed of planet Earth. So occurring of day and night in the Saturn takes place faster as compared to earth.

Hence, length of day and night is get affected due to the fast movement.

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Latent heat of fusion for ice is 33600J/k

Heat absorbed

Answer:

it can be controlled by balancing of the reaction

Electrolytic cell is the device which requires electrical energy to produce a chemical change.

This is referred to as electrochemical cell that requires an external source of electricity to effect a chemical change.

Without the source of the electricity, the chemical change won't have been produced at all.

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Balanced one

Moles of Pentyne

Moles of H_2O

1mol releases 241.8KJ

2mol releases 241.8(2)=483.6KJ

Answer:

A saturated solution may not be a concentrated solution IF the solute is only sparingly or slightly soluble in the solution.

During photosynthesis, Oxygen is released through stomata and Carbon dioxide enters stomata.

Photosynthesis is defined as the process by which green plants use sunlight, water, and carbon dioxide to manufacture their own food in the form of sugar.

The stomata is a pore found on the leaves stem and roots which controls the movement of molecules in and out of the plant.

During photosynthesis, Oxygen is released through stomata and Carbon dioxide enters stomata.

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Answer:

The answer is B, and C

Explanation:

Answer:

Ideal fuel shows the following characteristics:

• It should be less expensive,

• It should be easily available,

• It should produce a large amount of heat,

• It can be transported easily.

• It has high calorific value.

• It should burns easily in air at a moderate rate.

The three macroscopic properties of a gas in terms of the microscopic nature of atoms and the molecules making up the gas is explained by the kinetic theory of gases. The macroscopic properties like pressure, volume and temperature are used to study a gas.

The kinetic theory of gases is a theoretical model which describes the molecular composition of the gas in terms of a large number of submicroscopic particles which include atoms and molecules. Gas is a combination of large number of atoms or molecules.

The kinetic theory of gases considers that the atoms or molecules of a gas are constantly moving point masses which contain a huge inter-particle distance and may undergo perfect elastic collisions.

1. Since the particles are in motion, the average kinetic energy is proportional to the temperature of the gas. So when the inflated balloon is placed in a freezer, the balloon shrinks due to decrease in temperature.

2. When balloon is kept outside in the sun, it will burst due to expansion of gases.

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Unsaturated solution: a solution in which more solute can be dissolved.

Explanation:

Salt dissolved in water or even sugar dissolved in water is an unsaturated solution if the quantity of dissolved salt/sugar is below the saturation point.

unsaturated solution: a solution in which more solute can be dissolved.

Explanation:

A solution in which the maximum amount of solvent has been dissolved. Any more solute added will sit as crystals on the bottom of the container.

A primary amine will produce two signal(s) above 3300 [tex]cm^1[/tex], because the amino group has two possible modes of stretching (symmetric and asymmetric)

Infrared radiation (IR), sometimes referred to simply as infrared, is a region of the electromagnetic radiation spectrum where wavelengths range from about 700 nanometers (nm) to 1 millimeter (mm).

The N-H stretches of amines are in the region 3300[tex]cm^1[/tex].

These bands are weaker and sharper than those of the alcohol O-H stretches which appear in the same region.

In primary amines ([tex]RNH_2[/tex]), there two bands in this region, the asymmetrical N-H stretch and the symmetrical N-H stretch.

Hence, In IR spectroscopy a primary amine will produce two signal(s) above 3300 cm-1, because the amino group has two possible modes of stretching (symmetric and asymmetric).

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Answer:

Engineering is all about solving problems using math, science, and technical knowledge. And engineers have solved a lot of problems in the world by designing and building various technologies. We have everything from machines that can breathe for you in hospitals to suspension bridges to computers we use every day. All of these things were once designed by engineers using the engineering design process.

Explanation:

Answer:

Students will have to use their brains to solve problems and challenges they will face to find a solution to cleaning up oil spills. Students will face failures after completing their solution, lots of research, and problems during the making of their solutions. What will work? What won't?

Explanation:

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