3. A sample of neon gas has a volume of 1.2 L at 28.5°C. What will the volume be at 125°C it the
pressure remains constant?

Answer:

c is da answer it didn't move

Solids, liquids, and gases differ in terms of packaging of the atoms in its constituent atomic level.

Solids, liquids, and gases are the three main states of matter. They differ in the way their atoms or molecules are arranged and how they interact with one another. Solids have a definite shape and a definite volume. The atoms or molecules in a solid are tightly packed together and are not free to move around. Solids also have a low compressibility and a high density. Liquids have a definite volume but no definite shape. They take the shape of their container. The atoms or molecules in a liquid are close together but are free to move around. Liquids have a low compressibility and a lower density than solids. Gases have no definite shape or volume. They expand to fill their container. The atoms or molecules in a gas are widely spaced and are free to move around. Gases have a high compressibility and a low density. Examples of gases include air, oxygen, and natural gas. In summary, Solids have a fixed shape and volume, liquids take the shape of their container, have a definite volume and gases have no fixed shape or volume and expand to fill their container.

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The table of elements is called the periodic table because it describes the periodic recurrence of chemical properties. Therefore, the correct option is option B.

The periodic table is a list of chemical elements arranged according to their chemical characteristics, atomic number, and electron configuration. It includes a thorough review of all recognised elements and offers useful details about the traits of each element and its interactions with other elements. Because it arranges the elements according to their atomic number, electron configuration, and chemical properties in such a way that atoms with comparable properties recur at regular intervals, the table of elements is known as the periodic table.

Therefore, the correct option is option B.

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Answer:

Oxygen, O2 is the limiting reactant.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

2C6H6 + 15O2 —> 12CO2 + 6H2O

Next, we shall determine the limiting reactant as follow:

From the balanced equation above,

2 moles of C6H6 reacted with 15 moles of O2.

Therefore, 6 moles of C6H6 will react with = (6 x 15)/2 = 45 moles of O2.

From the calculations made above, we can see that it will take a higher amount of O2 i.e 45 moles than what was given i.e 33.75 moles of O2 to react completely with 6 moles of C6H6.

Therefore, O2 is the limiting reactant and C6H6 is the excess reactant.

Answer:

N20

Explanation:

Explanation:

Jen runs at a little under 10m per second. Ann runs about 6m per second. Jen won because her time was faster. She reached 50m by 6 seconds while it took Ann 8 seconds. If the graph displayed their motion stopping, the line would continue straight horizontally along the 50m line as they would not be running anymore.

1. Short time scale change on the ecosystem:

One example of a short time scale change on the ecosystem is the oil spill that occurred in the Gulf of Mexico in 2010. This disaster resulted in the contamination of the water, which ultimately led to the death of marine life and affected the food chain. The spill had a significant impact on the fishing industry in the region and took years to recover from.

2. The law of unintended consequences:

The law of unintended consequences states that actions always have consequences that are not anticipated. One example is the use of pesticides in farming. Although the use of pesticides reduces the risk of crop damage and increases yield, it also has unintended consequences. The pesticides can harm other organisms that come into contact with the crops, including bees and other beneficial insects that play a critical role in pollination.

3. Disposal sanitary method:

The disposal of waste is a significant problem in today's world, and sanitary landfill is a popular method of disposal. It involves the burial of waste in a landfill that is lined with materials that prevent leaching of harmful chemicals into the soil. This method of disposal is effective but has disadvantages. It produces greenhouse gases and requires large amounts of land.

4. Causes of Acid Rain:

The causes of acid rain include emissions from industrial activity, power generation, and transportation. These emissions release sulfur dioxide and nitrogen oxides, which react with the atmosphere to form acid rain. Acid rain has significant consequences for aquatic life and forests, as well as buildings and infrastructure.

5. Greenhouse gases:

Greenhouse gases are gases that trap heat in the atmosphere, causing the earth's temperature to rise. Examples include carbon dioxide, methane, and water vapor. Greenhouse gases are primarily produced by human activity, including transportation, industrial processes, and deforestation. The increase in greenhouse gas concentrations has resulted in climate change.

6. Effect of Ozone problem on Human:

The ozone layer is essential because it absorbs harmful UV rays from the sun. The depletion of the ozone layer due to human activity has resulted in an increase in skin cancer and other health problems. Exposure to UV radiation can also cause damage to the eyes and the immune system.

7. Genetic Mutation causes:

Genetic mutations can occur naturally or due to human activity, including exposure to radiation, chemicals, and toxins. Genetic mutations can cause health problems, including cancer and developmental disorders. Mutations can also have positive effects, such as improving immunity to certain diseases.

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Answer:

Pressure (P) is defined as the force of all the gas particle/wall collisions divided by the area of the wall: pressure=forcearea..

Explanation:

All gases exert pressure; it is one of the fundamental measurable quantities of this phase of matter

Answer: D

Explanation:

Answer:

C. Friction

Explanation:

Because friction needs contact to occur, the other forces do not require contact like friction does.

While visiting his uncle's farm, Derek learned that horses and donkeys are two different species. Based on this information, Derek can infer that horses and donkeys are members of different populations.


Since horses and donkeys are different species, they belong to different populations. A population refers to a group of individuals of the same species that live in the same area and can interbreed. While horses and donkeys can mate, their offspring, known as mules, are usually infertile.

This means that mules cannot produce offspring of their own, which indicates that horses and donkeys are not members of the same population. In contrast, if they were members of the same population, they would be able to produce fertile offspring. Therefore, Derek can infer that horses and donkeys are members of different populations.

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Answer:

it's no. 4 in my opinion

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

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

From the question

mass = 47 g

volume = 75 mL

The density is

\(density = \frac{47}{75} \\ = 0.626666666...\)

We have the final answer as

Hope this helps you

To find the concentration of sulfide ion when hydroxide ion begins to precipitate, we need to determine the point at which the reaction between sodium sulfide and iron(III) nitrate produces a precipitate.

This reaction can be represented by the following balanced equation: Na2S(aq) + Fe(NO3)3(aq) → FeS(s) + 2NaNO3(aq) First, let's write the balanced equation for the reaction between potassium hydroxide and iron(III) nitrate:

3KOH(aq) + Fe(NO3)3(aq) → Fe(OH)3(s) + 3KNO3(aq)

From the balanced equation, we can see that for every 3 moles of potassium hydroxide (KOH), we get 1 mole of Fe(OH)3(s) precipitate.

Therefore, when hydroxide ion begins to precipitate, the concentration of sulfide ion will be equal to the concentration of potassium hydroxide. Given that the concentration of sodium sulfide is 1.27×10^(-2) M and the concentration of potassium hydroxide is 1.35×10^(-2) M, the concentration of sulfide ion [S^2-] at the point of precipitation is also 1.35×10^(-2) M. Therefore, the concentration of sulfide ion when hydroxide ion begins to precipitate is 1.35×10^(-2) M.

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Explanation:

so mass = moles × mr ( mr is 164)

so 4.76 × 164

which is 780.64 g

so to 3 s.f it is 780 g

hope this helps :)

In order to neutralise 15.0 mL of 1.00 M KOH, we therefore require 15.0 mL of 0.50 M Sulfuric acid.

Strong acid and strong base reactions produce a salt that is neither acidic nor basic in nature, or neutral. For instance, sodium chloride and water are produced when HCl (hydrochloric acid), a powerful acid, combines with NaOH, a powerful base.

First, let's calculate the number of moles of potassium hydroxide in 15.0 mL of 1.00 M solution:

moles of Potassium hydroxide = concentration × volume

moles of Potassium hydroxide = 1.00 M × 15.0 mL / 1000 mL per L = 0.015 mol

moles of Sulfuric acid = moles of KOH / 2 = 0.015 mol / 2 = 0.0075 mol

moles of Sulfuric acid = concentration × volume

0.0075 mol = 0.50 M × volume

volume = 0.0075 mol / 0.50 M = 0.015 L

volume in mL = 0.015 L × 1000 mL per L = 15.0 mL

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Answer: nonmetals are located on the upper right

Explanation:

Answer:

c

Explanation:

8.4

For the reaction H₂SO₄ + 2NaC≡N → 2HC≡N + Na₂SO₄, we have that 8.4 moles of sodium cyanide are needed to produce 4.2 moles of sodium sulfate (option C).

The reaction between sodium cyanide and sulfuric acid is:  

H₂SO₄ + 2NaC≡N → 2HC≡N + Na₂SO₄

We can find the number of moles of sodium cyanide, assuming that it is the limiting reactant and knowing that 2 moles of it produce 1 mol of sodium sulfate, as follows:  

\( n_{NaC\equiv N} = \frac{2\: moles\: NaC\equiv N}{1 \: mol\: Na_{2}SO_{4}}*4.2 \: moles\: Na_{2}SO_{4} = 8.4 \: moles \)  

Therefore, 8.4 moles of sodium cyanide are needed to produce 4.2 moles of sodium sulfate (option C).  

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Answer:

256.66cm³is the capacity of the cone.

Answer:

Explanation:

We're asked to calculate the number of atoms of

Ca

in

153

g Ca

.

What we must first do is convert the given mass of calcium to moles of calcium, using its molar mass (referring to a periodic table, this is

40.08

g

mol

):

153

g Ca

(

1

mol Ca

40.08

g Ca

)

=

3.82

mol Ca

Using Avogadro's number,

6.022

×

10

23

particles

mol

, we can calculate the number of atoms present:

3.82

mol Ca

(

6.022

×

10

23

atoms Ca

1

mol Ca

)

=

2.30

×

10

24

atoms Ca

Answer:

normal matter in the Universe are mostly empty space

Explanation:

ATP molecule supplies the energy for the reaction that converts gal3p to rubp and by LDR process was this molecule generated

RuBisCO, an enzyme, works with RuBP, another molecule, to catalyze a reaction with CO2. A G3P molecule with three carbons exits the cycle after three cycles and joins a carbohydrate molecule. The leftover G3P molecules continue to cycle in order to be renewed into RuBP, which is then prepared to interact with more CO2 energy . Using decreased NADP and ATP, glycerate 3-phosphate (GP) energy s changed into triose phosphate (TP). In the light-dependent processes, the reduced NADP serves as the reducing agent (hydrogen) and is transformed back into NADP. The process also uses ATP as an energy source.

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586cm^3 is the volume of hydrogen if the temperature is raised to 67°c and the pressure is decreased to 80 kpa​.

Which three ideal gas laws are there?

According to Boyle's Law, gas volume grows as pressure lowers. According to Charles' Law, a gas expands in volume as its temperature rises. Additionally, Avogadro's Law states that as gas concentration rises, so does its volume.

The definition of an ideal gas is a gas in which the volume of the molecules and the forces between the molecules are so minimal as to not affect the behavior of the gas.

P1V1/T1 = P2V2/T2

V2 = ?

P1 = 196kPa

V1 = 250cm^3

T1 = 17degree celcius

P2 = 80kPa

T2 = 67 degree celcius

V2 = P1V1T2/T1P2

     = 196*250*67/17*80

     = 586cm^3

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Answer:

The volume of water vapor produced at STP is 11.60 L.

Explanation:

The decomposition reaction of H₂O₂ is:

2H₂O₂ → O₂ + 2H₂O     (1)

We have:

m(H₂O₂): mass = 17.0 g

M(H₂O₂): molar mass = 34 g/mol    

To find the volume of water vapor produced we need to find first the number of moles of H₂O₂ and H₂O:

\( n_{H_{2}O_{2}} = \frac{m}{M} = \frac{17.0 g}{34 g/mol} = 0.5 moles \)

From the reaction (1) we have that 2 moles of H₂O₂ produce 2 moles of H₂O, so the number of moles of H₂O is:

\( 2n_{H_{2}O_{2}} = 2n_{H_{2}O} \rightarrow n_{H_{2}O} = 0.5 moles \)

Now, we can find the volume of water vapor produced at STP, using Ideal gas law:

\( V = \frac{nRT}{P} = \frac{0.5 moles*0.085 L*atm/K*mol*273 K}{1 atm} = 11.60 L \)  

Therefore, the volume of water vapor produced at STP is 11.60 L.

I hope it helps you!

Answer:

L-2.75 W-2.75 H-2.85

Explanation:

Answer:

Explanation:

The correct reaction that represents the process of neutralization is:

HCl(aq) + KOH(aq) → KCl(aq) + H₂O(l)

Neutralization is a chemical reaction between an acid and a base, which results in the formation of water and a salt. In this case, hydrochloric acid (HCl) is the acid, and potassium hydroxide (KOH) is the base. When they react, they form potassium chloride (KCl) and water (H₂O).

Answer:

Explanation:

I just had this question on my test

Answer:

Sulfer

Explanation:

We just took the lesson lol