Determine the number of moles of oxygen gas (O2) that are needed to react with 0.725 moles of aluminum (Al).

4Al (s) + 3O2 (g) ⟶ 2Al2O3 (s)

Answer:

Dark Blue: Symbolizes integrity, knowledge, power, and seriousness. Blue: Peace, tranquility, cold, calm, stability, harmony, unity, trust, truth, confidence, conservatism, security, cleanliness, order, loyalty, sky, water, technology, depression, appetite suppressant.

The limiting reactant is oxygen.

To determine the limiting reactant, we need to compare the amount of product that each reactant can produce.

The balanced chemical equation for the combustion of ethene (C2H4) with oxygen (O2) is:

C2H4 + 3O2 → 2CO2 + 2H2O

From the equation, we can see that 1 mole of ethene reacts with 3 moles of oxygen to produce 2 moles of carbon dioxide and 2 moles of water.

Let's first calculate the number of moles of each reactant:

Number of moles of C2H4 = 34.1 g / (28.05 g/mol) = 1.215 moles

Number of moles of O2 = 28.8 g / (32 g/mol) = 0.9 moles

Next, we need to determine which reactant is limiting. To do this, we compare the moles of each reactant to the stoichiometric ratio in the balanced chemical equation.

For ethene:

1.215 moles C2H4 x (3 moles O2 / 1 mole C2H4) = 3.645 moles O2 required

For oxygen:

0.9 moles O2 x (1 mole C2H4 / 3 moles O2) = 0.3 moles C2H4 required

We can see that the amount of oxygen available (0.9 moles) is less than the amount required (3.645 moles) according to the stoichiometric ratio. Therefore, oxygen is the limiting reactant.

In conclusion, the limiting reactant is oxygen.

Learn more about limiting reactants here: https://brainly.com/question/14222359

#SPJ1

The total pressure of the gases in the 1.0 L vessel at 298 K is 7.0 atm.

To address this problem, we can utilize the ideal gas law, which establishes a relationship between pressure (P), volume (V), the number of moles (n), the gas constant (R), and the temperature (T). The ideal gas law equation is PV = nRT. Since the volume and temperature remain constant, we can simplify the equation to P ∝ n, indicating that pressure is directly proportional to the number of moles.

Given the ratio of Ne, Xe, and Ar atoms as 4:2:1, let's assume the number of Ne atoms is 4x, Xe atoms is 2x, and Ar atoms is x. When these gases are combined, the total number of moles becomes 7x.

Considering the pressure directly correlates with the number of moles, the pressure ratios will also be in the ratio of 4:2:1. Consequently, the pressure of Xe will be (4.0 atm) * (2/4) = 2.0 atm, and the pressure of Ar will be (4.0 atm) * (1/4) = 1.0 atm.

To calculate the total pressure of the gases when combined in the 1.0 L vessel, we sum up the individual pressures:

Total pressure = Pressure of Ne + Pressure of Xe + Pressure of Ar

= 4.0 + 2.0 + 1.0

= 7.0 atm

Therefore, the total pressure of the gases in the 1.0 L vessel at 298 K is 7.0 atm.

The correct answer is D. 7.0 atm.

The question should be:

In the situation described, there are three separate 2.0 L vessels, each holding a distinct inert gas at a temperature of 298 K. The pressure of Ne in the first vessel is measured as 4.0 atm. Additionally, the vessels contain a relative ratio of Ne, Xe, and Ar atoms, with a proportion of 4:2:1, respectively, the task is to determine the total pressure of the gases when combined in a previously evacuated 1.0 L vessel at 298 K. Which of the following options represents the correct total pressure?

A. 18 atm

B. 3.5 atm

C. 14 atm

D. 7.0 atm

Learn more about pressure at: https://brainly.com/question/24719118

#SPJ11

The moles of hydrogen required for the synthesis of 13.78 mol ethane has been 27.56 mol. Thus, option C is correct.

The balanced chemical equation for the synthesis of ethane has been:

\(\rm C_2H_2\;+\;2\;H_2\;\rightarrow\;C_2H_6\)

In a balanced chemical equation for the synthesis of 1 mole of ethane, 2 moles of hydrogen is required.

The moles of hydrogen required for the synthesis of 13.78 mol of ethane has been:

\(\rm 1\;mol\;C_2H_6=2\;mol\;H_2\\13.78\;mol\;C_2H_6=13.78\;\times\;2\;mol\;H_2\\13.78\;mol\;C_2H_6=27.56\;mol\;H_2\)

The moles of hydrogen required for the synthesis of 13.78 mol ethane has been 27.56 mol. Thus, option C is correct.

For more information about balanced equation, refer to the link:

https://brainly.com/question/7181548

Answer:

About 277 Kelvin

Explanation:

Take the celcius, and add 273.15 to it

4°C + 273.15 = 277.15K

And round the answer to the nearest whole

277.15K ≈ 277K

Divide the mass of oxalic acid by the molar mass of oxalic acid. The molar mass of oxalic acid is 90.03 g/mol.

Let's take an example. Suppose you used 1.5 grams of oxalic acid in trial 1. To find the moles of oxalic acid, you would divide 1.5 grams by 90.03 g/mol, which gives you 0.0167 moles. You would then record this value in the table for trial 1. Similarly, you would perform this calculation for all the other trials and record the values in the table.
In Part 3, Step 1, you are asked to calculate the moles of oxalic acid used in each trial. To do this, divide the mass of oxalic acid by its molar mass. Molar mass is the mass of one mole of a substance, and for oxalic acid (H2C2O4), it is approximately 90.03 g/mol. In your table, for each trial, record the mass of oxalic acid used and divide it by the molar mass (90.03 g/mol) to find the moles.

To know about moles

https://brainly.com/question/30885025

#SPJ11

Answer:

hola responderé

Explanation:

el h2o es agua y el agua es mojada gracias por su atención

\( {\qquad\qquad\huge\underline{{\sf Answer}}} \)

- Empirical formula represents a molecule with its elements combined in simplest ratio, it's not necessarily same as the form in which the compound really exists in the nature. Hence we can say that empirical formula shows the simple ratios in which atoms combined to form a molecule.

For example : Hydrogen peroxide

- Hydrogen peroxide exists in nature as \(\sf H_2O_2 \), which is its molecular formula.

but it's empirical formula will be H0 [ simplest ratio of 1 : 1 ]

Therefore, the correct choice is :

The pOH of a solution with a hydrogen ion concentration of 1x10⁻⁹ is 5.

The pH and pOH of a solution are related to the concentration of hydrogen ions (H⁺) and hydroxide ions (OH⁻), respectively. The pH is defined as the negative logarithm of the H⁺ concentration, while the pOH is defined as the negative logarithm of the OH⁻ concentration. The sum of the pH and pOH is always equal to 14.

To determine the pOH of a solution with an H⁺ concentration of 1x10⁻⁹ M, we can use the equation:

pOH = -㏒[OH⁻]

Since water is neutral and the H⁺ and OH⁻ concentrations are equal in a neutral solution, we can use the equation:

Kw = [H⁺][OH⁻]

      = 1x10⁻¹⁴

Solving for the OH⁻ concentration, we get:

[OH⁻] = 1x10⁻¹⁴ / [H⁺]

         = 1x10⁻¹⁴ / 1x10⁻⁹

         = 1x10⁻⁵ M

Substituting this into the pOH equation, we get:

pOH = -㏒[1x10⁻⁵]

         = 5.

So, The pOH of a solution containing 1x10⁻⁹ hydrogen ions is 5.

To know more about the Concentration, here

https://brainly.com/question/29006294

#SPJ1

The total quantity of creosol solution is q1 = 8.25ml.

a flavourless, strong, oily liquid, CH3OC6H3(CH3)OH, made from guaiac resin and beechwood tar; it is an active ingredient in creosote and is used as an antibacterial. Word genesis.

total quantity (q2) = 50 ml

concentration of final solution

C2 = 1:150

= 1/150 * 100

= 0.66%

quantity of stock * concentration of stock = quantity of final solution * concentration of final solution

q1 * c1 = q2 * c2

q1 = 50 * 0.66/4

q1 = 8.25ml

to learn more about creosal solution go to -

https://brainly.com/question/13930404

#SPJ4

Answer:

Lines in the spectrum were due to transitions in which an electron moved from a higher-energy orbit with a larger radius to a lower-energy orbit with smaller radius. The orbit closest to the nucleus represented the ground state of the atom and was most stable; orbits farther away were higher-energy excited states.

Explanation:

There is an intimate connection between the atomic structure of an atom and its spectral characteristics. Atoms of individual elements emit light at only specific wavelengths, producing a line spectrum rather than the continuous spectrum of all wavelengths produced by a hot object. Niels Bohr explained the line spectrum of the hydrogen atom by assuming that the electron moved in circular orbits and that orbits with only certain radii were allowed. Lines in the spectrum were due to transitions in which an electron moved from a higher-energy orbit with a larger radius to a lower-energy orbit with smaller radius. The orbit closest to the nucleus represented the ground state of the atom and was most stable; orbits farther away were higher-energy excited states. Transitions from an excited state to a lower-energy state resulted in the emission of light with only a limited number of wavelengths Atoms can also absorb light of certain energies, resulting in a transition from the ground state or a lower-energy excited state to a higher energy excited state. This produces an absorption spectrum, which has dark lines in the same position as the bright lines in the emission spectrum of an element. Bohr's model revolutionized the understanding of the atom but could not explain the spectra of atoms heavier than hydrogen.

Answer:

https://download.cnet.com/1-Click-Answers/3000-2378_4-10060189.html

Explanation:

Answer:

I can't understand your language? can you write in English

I'm sorry

Answer:

the concentration is 10^(-8) M

The concentration of [H30+] in the solution when the pH of the solution is \(1.32*10^8\ m.\)

Since The pH of a solution is 7.880

So here

pH = -log{H+}

{H+} = \(10^-PH\)

[H30+] \(= 10^{-7.88}\)

\(= 1.3182*10^-8\ mol\\\\= 1.32*10^-8\ m\)

hence, The concentration of [H30+] in the solution is \(1.32*10^8\ m.\)

Learn more about concentration here: https://brainly.com/question/23063846

Explanation:

To identify the contents of the three unlabelled test tubes, you could carry out the following test-tube reactions:

To identify the alkene:

Add bromine water (dilute aqueous solution of bromine) dropwise to each test tube. The alkene will react with the bromine water and decolourize it, giving a clear solution. The alkane and water test tubes will not show any reaction.

To identify the alkane:

Add a few drops of a concentrated sulfuric acid to each test tube. The alkane will not react with the sulfuric acid, and there will be no observable reaction. The alkene and water test tubes will show no reaction or some reaction, but not as significant as the alkane test tube.

To identify water:

Add a few drops of anhydrous copper (II) sulfate to each test tube. The anhydrous copper (II) sulfate will react with any water present in the test tube and turn blue. The alkane and alkene test tubes will not show any reaction with copper (II) sulfate.

By performing these test-tube reactions, you should be able to identify which test tube contains an alkene, an alkane, and water.

An existing ecosystem can suffer from damage from invasive species in many different ways, such as shifting habitats and depriving native creatures of food and resources.

An invasive species is an organism that damages the environment or the economy in a new location in which it is not native. Invasive species may disrupt the food chain of a ecosystem by killing or substituting natural food sources. The invasive species could provide little to no food value to wildlife.

Accidental introduction of invasive species into a new area is common. In Central Asia, the Black Sea and the Caspian Sea are home to zebra mussels. Zebra mussels accidently made their way to the Great Lakes of North America after becoming affixed to massive ships that sailed between the two areas.

To know more about Invasive species visit:

https://brainly.com/question/21452505

#SPJ9

Answer:

1.what is going to happen to the climate in the future?

2.why can climate affect people's health?

3.how does the changing climate affect all human beings?

Explanation:

1. if we are not thinking about the climate or incase the global warming increases it can cause flood in coastal areas and the ice Berks in the polar regions may melt and cause the sea level to increase.

2.if the climate becomes worse it can kill many people some people can get respiratory diseases . as most fuels we use produces harmful products it's can cause pollution and can kill many people

3.if the climate changes some animals can't adapt to the climate and they can even get extinct and as the climate change may result in many natural disasters it can also kill people

that's why it is very important to take care of the environment and climate

hope you understood

Answer:

4,768.57

Explanation:

If you are asking us to calculate, your answer is above. Easiest and fastest way is to plug it into the calc.

yes it is atomic if the mass number is that high

The two basic geologic processes which contributed to the formation of folded mountain ranges like in Glacier National Park include:

This is a geologic process which involve materials in the earth being washed away and transported to other parts by water, wind etc.

In the case of Glacier National Park, ice erodes the mountain thereby resulting in the folding of the sedimentary rocks.

Read more about Glacial erosion here https://brainly.com/question/8880387

#SPJ1

To prepare a 100.00 ml solution of 0.25 M CuSO4·5H2O from solid CuSO4·5H2O, you will need the following materials and steps.

Dissolve the weighed CuSO4·5H2O in a small amount of distilled water in a beaker. Stir until all the solid is dissolved.Transfer the dissolved CuSO4·5H2O solution quantitatively to a 100.00 ml volumetric flask. You can use a funnel to aid in the transfer.Rinse the beaker with distilled water and add the rinsings to the volumetric flask to ensure all the dissolved CuSO4·5H2O is transferred.Add distilled water to the volumetric flask up to the mark on the neck of the flask. Use a dropper or a wash bottle to carefully reach the mark without overfilling.Cap the volumetric flask tightly and mix.

To know more about bottle visit :

https://brainly.com/question/5598654

#SPJ11

Answer:

The correct option is;

A. 0

Explanation:

The ammonia molecule has four pairs of electron whereby being located around the central nitrogen atom is tetrahedral in shape.

Of the four pairs of electrons, three are the bonds between nitrogen and hydrogen, such that there is only one lone pair of electron in the ammonia molecule that is located on the central nitrogen atom

The one electron on each hydrogen atoms and one of the electrons on the nitrogen atom form a bonding pair of electrons, that is the bonding pair of electrons are shared by the two nuclei, hydrogen and nitrogen

Since a lone pair are a pair of electrons attached to only one nucleus, the hydrogen in ammonia has no lone pair of electrons.

Answer: lightbulb, lamp, nightlight

Explanation:

Answer:

The answer is either geosphere, hydrosphere, atmosphere, cryosphere, or biosphere. Its not the answer but its a hint. Please follow

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

B. that is the answerrrrrrrrrrrrr

Explanation:

i

Answer:

Arrhenius equation

k=Ae^{{\frac  {-E_{a}}{RT}}}

Explanation:

k = rate constant

A = pre-expoIn

E_{a} = activation energy (in the same units as R*T)

R = universal gas constant

T = absolute temperature (in Kelvin)

in chemistry and physics, activation energy is the minimum amount of energy that must be provided for compounds to result in a chemical reaction. The activation energy of a reaction is measured in joules per mole, kilojoules per mole or kilocalories per molenential factor

An ionic equation is a chemical equation in which the electrolytes in aqueous solution are expressed as dissociated ions.

Given the molecular equation of the reaction of aqueous potassium sulfate, K2SO4, and aqueous strontium iodide, SrI2 as shown:

The total ionic equation is as shown below;

Next is to get the net ionic equation from the total ionic equation. Canceling out the common ions on both sides of the equation will give:

This gives the net ionic equation of the given molecular equation

Answer:

12.2g

Explanation:

I took the quiz :)