How many moles of a gas are contained in 2.085 L at STP?

A. 0.0931 mol
B. 10.8 mol
C. 10.3 mol
D. 1.11 mol

Answer:

increasing the pressure

Explanation:

You can make a solution more concentrated by increasing the pressure.

Answer:

81.08g of H[tex]_{2}[/tex]O will be produced.

Explanation:

Write down the balanced chemical equation:

[tex]B_5H_9 + O_2[/tex] ⇒ [tex]B_2O_3+H_2O[/tex]

[tex]2B_5H_9+12O_2[/tex] ⇒ [tex]5B_2O_3+9H_2O[/tex]

Determine the limiting reagent:

[tex]B_5H_9[/tex] :-    126/63.12646 = 1.995993 mol

               1.995993/2 = 0.9979965

[tex]O_2[/tex] :-         192/31.9988 = 6.000225 mol

               6.000225/12 = 0.50001875

Therefore, [tex]O_2[/tex], is the limiting reagent.

Use stoichiometry ratios to determine the number of moles of water produced:

         [tex]O_2[/tex]         :        [tex]H_2O[/tex]

         12          :          9

  6.000225   :       4,500168756328362

Use the mole formula to calculate the mass of water produced:

[tex]n=\frac{m}{M} \\m=nM\\m=(4.500168756328362)(18.01528)\\m=81.08g[/tex]

The final concentration of a solution that has been diluted by adding 100 ml of water to the original solution is 0.15M.

How to calculate concentration?

The concentration of a solution can be calculated using the following formula:

C1V1 = C2V2

Where;

C1 = initial concentration

C2 = final concentration

V1 = initial volume

V2 = final volume

1.5 × 10 = 100 × C2

15 = 100C2

C2 = 0.15M

Therefore, the final concentration of a solution that has been diluted by adding 100 ml of water to the original solution is 0.15M.

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Answer:

the aNSWRER TOP UR QUESTION IS THAT I NMEED TO ANSWER THIS SO I DONT HAVE TO WQATCH ADS  LOL

Explanation:

DSADSDASDASDASDSDSDSDSDS and i knowq chem is bio chwem is

The enthalpy change for the formation step of this intermediate is 136 kJ/mol.

The enthalpy of reaction can be obtained from the enthalpies of formation of the species involved. The enthalpy of reaction is the heat evolved or absorbed in a reaction.

Thus, the enthalpy change for the formation step of this intermediate is 4 *  34 kJ/mol = 136 kJ/mol.

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Answer:

Q1. False

Q2. True

Explanation:

gas molecules are not that at far than dimensions molecules

Answer:

In water, bases dissolve and provide hydroxide (OH-) to the surrounding solution. This lowers the acidity of the solution.

Answer:

I think a small spark can start a huge explosion because, a spark or a small firework for an example, can start a fire. You don’t want to have a spark or sparkler lit in your house. This is why I think that it could start a fire.

Explanation:

reasoning

My reason is that if you have a lighter, and you lite the sparkler or spark, you will definitely see a flame glowing at the top. One reason for why you need to lite things that could start fires outside is, that it can be deadly if you accidentally leave one inside or somewhere close to your house or a window. Another piece of evidence is one from a movie. This scenario is kind of like the one in a dogs purpose. A dog’s purpose is about how a dog begins there life as a puppy, they eventually end up having to be saved again by their owner but that’s the summary for just the small unimportant parts. But the real reason for why I’m comparing the question to this is because, in the movie, the rising action, is kind of when the dog, gets put to sleep. But after it goes on all different types of adventures both dangerous, boring at times, and then mood changing I think the story is similar to the question because, a adult sets a fire on the house and the owner of the dog and the owners mom have to get out with there dog. The owner that’s a boy or adult boy, has to jump out the window after saving his dog and this is how a small spark can make a huge impact or life changing lesson.

Answer:

Pedal, Pushing, and also launching it off a cliff with a catapult

Explanation:

I know nothing

The compound which on combustion produces Carbon-di-oxide and water is carbohydrates.

Those reaction in which the Crabon present in the reatctant gets reacted with oxygen and produces Carbon-di-oxide.

It is an Exothermic Reaction.

To find out the percentage of C, H and O, we must know about there weight in the product.

Given,

Total weight of compund [Reactant] = 17.41 grams

Weight of carbon dioxide [Product] = 25.61 grams

Weight of water [Product]= 10.48 grams

Now, we need to find out the weight of C,H and O in the products ;

No. of Moles of Crabon =   [tex]\frac{Given \\ weight\\ of\\ the\\ compound}{Molecular\\ weight\\ of\\ the compound}[/tex] x No. of C-atoms in molecule                          

No. of Moles of Crabon =25.61 / 44 = 0.58 x 1 = 0.58 moles

Mass of Carbon = 0.58 moles x 12 = 6.98 gm

No. of Moles of Hydrogen =   [tex]\frac{Given \\ weight\\ of\\ the\\ compound}{Molecular\\ weight\\ of\\ the compound}[/tex] x No. of H-atoms in molecule                          

No. of Moles of Hydrogen =10.48/ 18 = 0.58 x 2 = 1.16 moles

Mass of Hydrogen = 1.16 moles x 12 = 15.08 gm

                                       =   17.41 grams - ( 15.08 gm + 6.98 gm)
Mass of Oxygen  = 4.6 gm

Now,

Percentage of atom =  [tex]\frac{Mass \\ of \\ Atom}{Total\\ weight \\ of\\ compound}[/tex]   x 100

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Answer:

See explanation.

Explanation:

This will never naturally occur but you can tweak the system quantum mechanically to temporarily reverse entropy.

All of the above are true as regards carbon bonds in organic compounds and is denoted as option 5.

These are chemical compounds which contain carbon-hydrogen or carbon-carbon bonds. Carbon has four valence electrons which makes it tetravalent and able to form multiple bonds.

They can form multiple bonds and branched chains in hydrocarbons such as alkanes, alkenes and alkynes during reactions.

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Answer: How much heat it takes to raise the temperature

Specific heat describes how much heat a substance takes to raise the temperature. Hence, Option (c) is correct

Specific heat capacity is the amount of heat energy required to raise the temperature of a substance per unit of mass.

The specific heat capacity of a material is a physical property.

It is also an example of an extensive property since its value is proportional to the size of the system being examined.

Specific heat describes how much heat a substance takes to raise the temperature. Hence, Option (c) is correct

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Answer:

The particles moves faster thus Expanding the liquid

Answer:

the answer to the qustion is 0.013089701 na

Explanation:

n/a

Answer:

V = 0.41L

Explanation:

[tex]c=\frac{n}{V}\\n=cV\\14.7=6.0V\\ \\V=0.41l[/tex]

Answer:

20 ml

Explanation:

2.5 M   x      =     1 M  * 50

x = 20 ml

Answer:

ok so which answer do you want if you want all then here's this

Explanation:

you should remember that you aren't the only on who dosent know the answers because I don't so ask a parent

Food industries require that reaction rates be lowered and this can be done by addition of preservatives and by freezing food substances.

The rate of a reaction is a measure of amount of substances converted to products per unit.

Substances that speed up rate of reactions are known as catalysts.

Some catalysts though, reduce or slow down the rate of reactions.

An industry that requires the rate of reactions to slow down is the food industry.

Some methods employed to slow down reaction rates include:

Therefore, food industries require that reaction rates be lowered and this can be done by addition of preservatives and by freezing food substances.

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Answer:

both particles and waves

Explanation:

this is known as wave-particle duality.

I hope this helps.

Have a nice day.

A gas at STP is heated to 35 degree C. The new pressure will be 2.41 atm.

The pressure of the mass of the gas is directly proportional; to the temperature of the gas.

[tex]\dfrac{P_1 }{T_1} =\dfrac{P_2}{T_2}[/tex]

Converting the temperature into kelvin

The initial temperature = 35 °C = 35 + 273 K= 308 K

The final temperature = 50 °C =50 + 273 K = 323 K

Initial pressure = 2.3 atm

Final pressure ?

Putting the values in the equation

[tex]\dfrac{P_1 }{T_1} =\dfrac{P_2}{T_2}\\\\\\{P_2 = \dfrac{P_1 \times T_2}{T_1} \\\\\\\\\\{P_2 = \dfrac{2.3 \times 323 }{308} = 2.41 atm.[/tex]

Thus, the new pressure will be 2.41 atm.

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At constant pressure, the volume of a gas is directly proportional to temperature as measured on the kelvin temperature scale.

This is defined as the degree of hotness or coldness of a substance and is influenced by thermal energy.

The standard unit is Kelvin which also compares it to volume  at constant pressure of a given gas.

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The answer to the product of the reaction of cyclopentanone with ethylene glycol, p−toluenesulfonic acid, and benzene is attached in the figure.

A chemical process in which substances act mutually on each other and are changed into different substances, or one substance changes into other substances is called a reaction.

Chemical reactions are an integral part of technology, of culture, and indeed of life itself.

The Product obtained of the reaction of cyclopentanone with ethylene glycol, p−toluenesulfonic acid, and benzene is attached in the figure .

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Answer:

Explanation:

The type of reaction represented by the diagram is (C). Fission

Nuclear fission can be defined as a reaction in which the nucleus of an atom splits or breaks into two or more smaller portions of nuclei.

Nuclear fission is so important and is often seen or encountered when dealing with elements with high nuclear properties.

In conclusion,  the type of reaction represented by the diagram is Fission

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Answer:

yes

Explanation:

im pretty sure yes, also i think this is 20 characters long

The structure of the cytosine base after catalysis by DNMT is 5'Mecytosine.

Cytosine (C) is one of the four nucleotide bases in DNA, with the other three being adenine (A), guanine (G) and thymine (T).

Methylation of the cytosine base is catalyzed by the enzyme DNA methyltransferase (DNMT), and S-adenosyl methionine (SAM) functions as the methyl group donor.

Hence, the structure of the cytosine base after catalysis by DNMT is 5'Mecytosine.

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