Which of the following is the correct equation for calculating SPEED?

Answer:

The final total pressure in the cylinder = 8.53 atm

Explanation:

From the information given:

The volume of liquid ethanol = 22.5 mL

The density of the liquid ethanol = 0.789 g/mL

The volume of the cylinder = 10.0 L

The pressure of the cylinder = 4.50 atm

The temperature of the cylinder = 25°C = (273.15 + 25) K = 298.15 K

Using the ideal gas equation:

PV = nRT

where n is the number of moles before the reaction:

[tex]n = \dfrac{PV}{RT}[/tex]

[tex]n = \dfrac{4.5 \ \times 10 }{0.08205 \times 298.15}[/tex]

n = 1.8395 moles

Recall that:

Density = mass /volume

Thus; the mass of liquid ethanol = (Density × volume ) of liquid ethanol

the mass of liquid ethanol = 0.789g/mL  × 22.5 mL

the mass of liquid ethanol = 17.7525 g

Since we know the mass of the liquid ethanol =  17.7525 g and the standard molar mass of liquid ethanol = 46.07 g/mol

Then:

the number of moles of liquid ethanol = 17.7525 g / 46.07 g/mol

the number of moles of liquid ethanol = 0.38534 mol

The chemical equation for the reaction can be represented as:

[tex]C_2H_5OH + 3O_2 \to 2CO_{2(g)} + 3H_2O_{(g)}[/tex]

From above 1 mole of ethanol react with 3 moles of oxygen to produce 2 moles of carbon dioxide and 3 moles of water

Since each mole of ethanol reacts with 3 moles of oxygen

Then:

0.38534 mol of ethanol = (0.38534 mol × 3) oxygen

Therefore, the amount of oxygen molecule left in the cylinder after the reaction = 1.8395 mol - (0.38534 mol × 3)

= 1.8395 mol - 1.15602 mol

= 0.68348 mol

The number of moles of carbon dioxide formed = 2 × moles of ethanol

number of moles of carbon dioxide formed =  2 × 0.38534 mol

number of moles of carbon dioxide formed =   0.77068 mol

The number of moles of water vapour formed = 3 × 0.38534 mol

The number of moles of water vapour formed = 1.15602 mol

∴

The total moles of gas = moles of oxygen left + moles of water vapour + moles of carbon dioxide

The total moles of gas =  0.68348 mol + 0.77068 mol + 1.15602 mol

The total moles of gas = 2.61018 mol

Finally, to find the total pressure in the cylinder when the temperature is 125°C = (273.15 + 125)K

= 398.15 K

Then; using the ideal gas equation PV = nRT

P = nRT/V

P = ( 2.61018  × 0.08205 × 398.15 ) / 10

P = 85.2699/10

P = 8.52699 atm

P ≅ 8.53 atm

Answer:

Ok audry vamos a esto,Si eso pasa,Los viruses dejaran de infectar o será peor? Si se redefina las características de la vida,Nos adaptarianos rapido?Que ganamos con cambiar eso? porque se debe de cambiar?

Ok audry let's get to this, if that happens, will the viruses stop infecting or will it be worse? If we redefine the characteristics of life, we adapt quickly? What do we gain by changing that? why should it be changed?

Explanation:

esas son las preguntas que tienes que hacer a ver si hace sentido el cambio que quieren hacer porque de que vale hacer un cambio sin saber si nos va a beneficiar o no O si eso va a resolver el conflicto. (is me lorenny XD )

Those are the questions that you have to ask to see if the change they want to make makes sense because of what is worth making a change without knowing if it will benefit us or not or if it will resolve the conflict. (is me lorenny XD)

Answer:

The mass of water is expressed in grams (g) or kilograms (kg), and the volume is measured in liters (L), cubic centimeters (cm3), or milliliters (mL). Density is calculated by the dividing the mass by the volume, so that density is measured as units of mass/volume, often g/mL.

Answer:

matter/mass is made up of anything you see touch and fell

Answer:

Biology

Explanation:

Answer:biology

Explanation:

Answer:

Honestly this is the first question I’m stumped on

Explanation:

Answer:

Plants respond directly to Earth's gravitational attraction, and also to light. Stems grow upward, or away from the center of Earth, and towards light. Roots grow downward, or towards the center of Earth, and away from light. This process turns the stem so that it once again grows upward, presumably toward the light.

Explanation:

Answer:

2AgNO3 + H2S => Ag2S + 2HNO3

Explanation:

Answer: Molality of a saline solution = 1.14 moles per kg

Explanation:

Given mass of NaCl (m)= 50.0 g

Mass of solvent = 0.750 kg

Molar mass of NaCl (M)= 23 g + 35.5 g = 58.5g  [Atomic mass of Na = 23 u , atomic mass of Cl = 35.5 u]

Number of moles (n) =[tex]\dfrac{m}{M}[/tex]

[tex]\dfrac{50}{58.5}=.8547[/tex]

Molality = [tex]\dfrac{\text{Number of moles }}{\text{Mass of solvent in kg}}[/tex]

[tex]=\dfrac{0.8547}{0.750}=1.1396\approx1.14\text{ moles per kg][/tex]

Hence, molality of a saline solution = 1.14 moles per kg

Answer:

here's the procedure to find it friend

Explanation:

How do you find the mass in grams of an atom?

In order to determine the mass of one atom of an element, you must determine its molar mass, which is its atomic weight on the periodic table in g/mol, and you need to know the relationship between moles and the number of atoms: 1 mol of atoms = 6.022×1023 atoms . Then divide the molar mass by 6.022×1023 atoms/mol .

Answer:

what model

Explanation:

ill answer if u have model

Answer:

The Lewis dot structure for Magnesium is an Mg with 2 dots which stand for its two valence electrons. The Lewis dot structure for Sulfur is an S with 6 dots which stand for its six valence electrons. ... The Magnesium atom has a +2 charge and the Sulfur atom has a -2 charge.

Explanation:

Answer:

digestion and respiration

Answer:

I think the answer is: Cell

Explanation:

im not sure but i think its cell

Answer:semiconductor

Explanation:a solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits.

Answer:

to prevent rust the man should oil his get or use lubricants to lubricate it

Answer:

valence electrons are determine by the numbers at the top of the grop so group 1 has 1 valence electron, group 2 has 2 valence electrons, groups 3-12 have no valence electrons, group 13 has 3 valence electrons, group 14 has 4 valence electrons, group 15 has 5 valence electrons, group 16 has 6 valence electrons, group 17 has 7 valence electrons and group 18 has 8 valence electrons exept helium. helium has 2 valence electrons.

Explanation:

Answer:

Atoms are single neutral particles.

Molecules are neutral particles made of two or more atoms bonded together.

Answer:

a molecule is made up of atoms bonded together so while an atom is its own separate entity a molecule is what you get when those atoms bond together. these might be the same elements such as two oxygen Atoms bonded together (O2), or it might be different Atoms bonded together like water(H20)

Answer:NaCl is a salt.

Explanation:

Answer:

It is salt

Explanation:

a. The atomic size of fluorine is very small compared to other halogens. Similarly, fluorine is the highest electronegative atom in periodic table. b.  CIF a T-shaped structure is asymmetric with dipoles that do not cancel out but produce a net dipole.

In a compound with atoms of significant difference in electronegativities, the shared pair of electrons attracts towards the more electronegative atom and this results in a charge separation. The measure of the separation of two electrical charges is called the dipole moment of the compound.

a. Fluorine is the most electronegative atom in periodic table. Compared to other halogens, F has very small atom and have less electron affinity compared to other halogens.

b. Cl - F is an interhalogen compound in which dipole moment  is created by the electronegativity difference between Cl and F. The net dipole moment is towards the F atom.

Find more on dipole moment:

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Answer:

I think it's choice C because if we route it below the ground the surface will remain dry wild underground will be wet which will be good for soil and its fertility I think that's the answer

Answer:

B

Explanation:

literal means actual

The language used in a manner that implies another, less literal meaning is figurative language. Option B is correct.

Figurative language is a type of language which is written in words and paragraphs which are meaningful and readable but not true or right or litrally true just use for giving examples.

Some examples are love is a battlefield or I am going through a rollercoaster of emotions etc. basically comparison of real-life situations to fictional thoughts or not literally true.

Therefore, option B is correct. The language used in a manner that implies another, less literal meaning is figurative language.

Learn more about  figurative language, here;

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Answer:

True

Explanation:

Answer:

hydrogen

oxygen

hydrogen is easily identified by a any liqiud substance

hydrogen=liquid

oxygen is also easily identified by air

oxygen=air

Answer:

Regulation of body temperature

Explanation:

Answer:

sodium??

Explanation:

Answer:

B. 16g

Explanation:

Answer:

Please Mark as Brainliest!!!!!!!

Explanation:

Answer is  in the below image

Answer:D

Explanation: if you have more than 2 authors , you cite the article by using the last name of the author followed by the phrase “et al”

APA- style citation is a writing format to mention and cite the sources in the journals and papers. Citation for an article with 3 authors is given as, Jones, et al., 2012. Thus, option D is correct.

APA- style citation is the format given by the American Psychological Association. It is a citation style that quotes the author's last name and date. The data quoted are enclosed in parentheses. For example, (Robert, 1997)

Unlike MLA, the APA citation style capitalizes only the titles and proper nouns. The tiles in the source are written in italics. The in-text and the reference list of the citation differ a little.

When a source contains three authors then, the APA citation style writes the last name of the author followed by the et al., and the year like Jones, et al., 2012.

Therefore, option D. Jones, et al., 2012 is the correct APA citation style.

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Answer:

So if they find something that looks illogical they can find thing that are loggical and see if there just put together

Explanation: