What are suspensions

Answer: Yes

Explanation:

Convert \(30km\) to \(min.\) by using the conversion factor that is given which is \(\frac{50km}{1hr}\).

\(30km/\frac{1hr}{50km}/\frac{60min}{1hr}=36min\)

This means it would take 36 minutes for the driver to reach 30 km

The mass percent of \(KNO_3\) in the solution is approximately 1.91%.

To calculate the mass percent of \(KNO_3\) in the solution, we need to divide the mass of \(KNO_3\) by the total mass of the solution (\(KNO_3\) + \(H_2O\)), and then multiply by 100%:

mass percent = (mass of \(KNO_3\) / total mass of solution) x 100%

The mass of \(KNO_3\)is given as 16.5 g. To find the total mass of the solution, we add the mass of \(KNO_3\) to the mass of \(H_2O\):

total mass of solution = mass of \(KNO_3\) + mass of\(H_2O\)

total mass of solution = 16.5 g + 848 g

total mass of solution = 864.5 g

Now we can calculate the mass percent:

mass percent = (16.5 g / 864.5 g) x 100%

mass percent = 1.91%

Therefore, the mass percent of \(KNO_3\) in the solution is approximately 1.91%.

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Answer:

Constant temperature variations

Explanation:

With temperature constantly heating many molecules within many forms of matter tend to move around. Take air for instance and density. When air is hot the molecules are moving very quickly because they are being what is known as energized (I don't know the scientific word I apologize.) However, when air is cold it tends to get harder to breath and that is because the air is more dense, since the molecules are atoms are much more compacted.

To further detail the process of cooling and heating up matter, water when it is cooled it tends to become ice; a solid based structure. Therefore, making it more dense or more compacted together. However, once heated the molecules begin to spread apart, in which the density lessens and the molecules become a liquid state or a gas state (depending on the amount of heat applied in terms of kelvin.)

Answer:

See answer below

Explanation:

In this case, I will put the original photo of this exercise, because we are missing one data. The first picture is the original exercise.

Now, according to this, we need to make a serial dilution of CO(NO₃)₂. We don't know the volume of this solution, but we do know the total volume of the preparing solution (In the picture states that the total volume will be 10 mL).

So, we know the final volume of the solutions to be prepared, so, le'ts use the expression that will help us to solve this:

C₁V₁ = C₂V₂

Where:

C₁: Concentration of the given solution (stock)

V₁: volume required to prepare the dilluted solution

C₂; Concentration of the dilluted solution

V₂: Total volume of the dilluted solution.

Now that we know the expression to use and the meaning of each value, let's prepare the solutions:

To prepare 10 mL of 0.1 M using a 0.25 M, we will replace these values in the above expression; from there, we will solve for V₁, that value will tell us the required volume to prepare solution 2, and then, by difference we can calculate the volume of water:

Volume of water (Vw) =V₂ - V₁  

Now replacing the values:

0.25V₁ = 0.1 * 10

V₁ = 1/0.25 = 4 mL

This means that we need 4 mL of the stock to prepare the 0.1 M of dilluted solution, therefore, the volume of water required is:

Vw = 10 - 4

Using these same steps for the other two solutions we will get V1 and V2 for both of them. In this case, I will go straight to the procedure without further explanation because it's the same of this one.

For solution 2:

0.1V₁ = 0.05 * 10

V₁ = 0.5/0.1

Vw = 10 - 5

Finally for solution 3:

V₁ = 0.01 * 10 / 0.05

Vw = 10 - 2 mL

Hope this helps

Answer:

3 mole O2

Explanation:

Need balanced equation first:  O2 + 2SO2 --> 2SO3

assuming SO2 is in excess,

1.5 mol O2 (2moles SO3/1mole O2) = 3 mole O2

According to the research, the correct answer is C. Electrical energy is converted to sound energy is the energy transformation that happens in Betsy's alarm clock to wake her up in the morning.

It is the study of how energy changes from one type as Electrical energy to another for example sound energy where a given system converts energy from one form to another.

In this sense, the power source of a clock can be an electric current while doing work, the energy transformation can lead to the formation of sound energy due to some mechanical activities inside the clock.

Therefore, we can conclude that the electrical energy that makes the clock work, whose vibrations cause the energy to be transformed into sound energy in the membrane, displace the coil within the magnetic field.

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Answer:

It would take 200,000 years for a spaceship traveling at the speed of light to go across the entire galaxy.

Answer:

polarity

Explanation:

because of its polarity it can dissolve mutiple substance

Answer:

yea i do

Explanation:

LETSSS GOOOOOO

Answer:

7.25

Explanation:

Answer:

an ecosystem

Explanation:

it compromises of living and non living things in an environment.

Answer:

9mol N

Explanation:

The balanced chemical equation is:

N₂ + 3H₂ → 2NH₃

According to the stoichiometry of this reaction, 1 mole of N₂ reacts with 3 moles of H₂ to produce 2 moles of NH₃.

So, to produce 2 moles of NH₃, we need 1 mole of N₂.

Therefore, to produce 18 moles of NH₃, we would need:

18 mol NH₃ × (1 mol N₂ / 2 mol NH₃) = 9 mol N₂

Thus, 9 moles of nitrogen are required to produce 18 mol of NH₃.

Refer the product in the image.The transfer of a proton (H+) in chemistry typically occurs through a mechanism known as an acid-base reaction.

This process involves the transfer of a proton from an acidic species (the proton donor) to a basic species (the proton acceptor), leading to the formation of a new acidic species and a new acid-base reactions species. In the final structure, the tetrahedral shape of the molecule and the absence of charge indicate that the proton transfer has resulted in the formation of a neutral species. In other words, the proton has been transferred from an acidic species to a basic species, neutralizing both species and resulting in a neutral compound with a tetrahedral shape. However, the general idea of the transfer of a proton from an acidic species to a basic species remains a key principle in understanding acid-base reactions.

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Refer the below image to answer the Question:

The style of Vincent Van Gogh's Starry Night (1889) is Post-Impressionism.

Post-Impressionism is an art movement that developed in France in the late 19th century as a reaction against the limitations of Impressionism. It is characterized by a focus on subjective emotions and personal interpretations of the world, as well as an interest in the formal qualities of art, such as color, line, and form.

Van Gogh's work is known for its expressive use of color and texture, and Starry Night is a prime example of his Post-Impressionist style, with its swirling brushstrokes, intense colors, and dreamlike quality.

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Deep inside the Earth's core, where temperatures are hot enough to melt rock, geothermal energy is created. I start my voyage from the planet's inner, hot core and make my way slowly but certainly to its outer layers.

Deep below hot water is pushed under strong pressure through a well. The pressure drops when the water reaches the surface, resulting in the formation of steam. A generator that generates electricity is coupled to a steam-spinning turbine.

According to archaeological findings, Paleo-Indian settlements at hot springs mark the beginning of human usage of geothermal resources in North America, which dates back more than 10,000 years.

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Answer:

Water isn't combustible. There is nothing you can add to it other than gasoline that will make it even remotely combustible. Now, through electrolysis, it can be broken down into hydrogen and oxygen, which could be burned in an internal combustion engine.

because  the water  in itself does not produce energy

Answer:

I believe it's 5.0 g of hydrogen

Explanation:

Sorry if i'm wrong

Answer:

500 KJ of thermal energy is equivalent to 13.695 moles of ethanol. Therefore, 13.695 moles of ethanol has a mass of 231.5 grams when vaporized at its boiling point (78.4°C) with 500 KJ thermal energy.

Answer:

se que la imaje es un poco confusa con la materia pero

desiaria ayudarte pero CREO que con mi TÉCNICA  es la A

The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.

Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.

Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.

It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.

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The maximum mass of water that could be produced by the chemical reaction is 1.35g.

The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Given,

The reaction - 2NaOH + 2HBr ⇒ 2NaBr + 2H₂O

Mass of HBr = 3.24g

Molar mass of HBr = 81

Mass of NaOH = 3g

Molar mass of NaOH = 40

                            Moles = mass ÷ molar mass

Moles of HBr = 3.24 ÷ 81 = 0.04 moles

Moles of NaOH = 3 ÷ 40 = 0.075 moles

The moles of NaOH is less, so NaOH is the limiting reagent and thus the mass of water would depend on the number of moles of NaOH.

From the reaction, 2 moles of NaOH give 2 moles of water

Therefore, 0.075 moles of NaOH will give 0.075 moles of water.

Mass of water = moles × molar mass

= 0.075 × 18

= 1.35g

Therefore, the maximum mass of water that could be produced by the chemical reaction is 1.35g.

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A structural formula is a graphical representation of a molecule that shows the arrangement of atoms

A structural formula is a graphical representation of a molecule that shows the arrangement of atoms in the molecule and how they are connected to each other. The structural formula typically uses lines to represent chemical bonds between atoms and shows the relative positions of the atoms in three-dimensional space.

The structural formula allows chemists to better understand the properties and behavior of a molecule based on its structure, such as its ability to form certain types of chemical bonds and participate in chemical reactions.

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Answer:

A food chain shows how energy flows from one organism to another. In general, energy flows from the Sun to producers and then to consumers. The path is linear as the energy present in one step is transferred to the next. You can find specific examples of this pathway in an ecosystem

The ideal gas law may be used to determine the volume of oxygen created in the electrolysis that produces 548 litres of hydrogen at STP (Standard Temperature and Pressure). PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature, according to the ideal gas equation.

The pressure is 1 atm, the temperature is 273 K, and the number of moles of hydrogen is 548/22.4 = 24.5 in this example. We may compute the volume of oxygen created by rearranging the ideal gas law: V = nRT/P = 24.5*0.082*273/1 = 483.3 litres.

As a result, the volume of oxygen created in the electrolysis at STP that produces 548 litres of hydrogen is 483.3 litres.

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Answer: The balanced equation is  4 NH3 + 7 O2  -->  4 NO2 + 6 H2O

Explanation:

Oxidation numbers

We begin by noting the oxidation numbers on each atom:

NH3:   N = -3, H = +1

O2:     O = 0

-----------------

NO2:  N = +4, O = -2

H2O:  H = +1,  O = -2

From this we conclude that N has lost 7 electrons, while O has gained 2.

Half-reactions

Because this case is more complex, we must consider the half-reactions:

Eq. 1)  N^-3  -->  N^+4  + 7 e-        (which says that N has lost 7 electrons)

Eq. 2) O  + 2 e- --> O^-2                (which says that O has gained 2 electrons)

However, oxygen is a diatomic atom, so we must adjust the second equation by a factor of 2.

Eq. 1)  N^-3  -->  N^+4  + 7 e-

Eq. 2) O2  + 4 e- --> 2 O^-2

Balancing the Half-reactions

To balance the half-reactions, we must multiply each equation by a factor that allows us to cancel out the electrons. The LCM of 7 and 4 is 28, so we multiply the first equation by 4, and the second equation by 7, giving:

Eq. 1)  4 N^-3  -->  4 N^+4  + 28 e-

Eq. 2) 7 O2  + 28 e- --> 14 O^-2      

Now, adding them together gives:

4 N^-3  +  7 O2  --> 4N^+4  + 14 O^-2

All together...

To complete the reaction, we must add the missing hydrogen atoms. With 4 nitrogen atoms on the left, we require 12 hydrogen atoms to construct the 4 NH3 molecules. We will add 12 H to both sides:

4 N^-3  +  7 O2  --> 4N^+4  + 14 O^-2

 + 12 H                      + 12 H

-------------------------------------------------------

4 N^-3 + 12 H + 7 O2  --> 4N^+4  + 14 O^-2 + 12 H

We can now combine all the atoms together into the known molecules on each side:

4 NH3 + 7 O2 --> 4N^+4 + 8 O^-2 + 12 H + 6 O^-2

which is,

4 NH3 + 7 O2 --> 4 NO2 + 6 H2O