Calculate the number of moles equal to 4.3 x 10^25 molecules of C2H6

The order of reaction must be determined experimentally or by calculation.

The order of reaction is the power to which a reactant must be raised in the rate law of the reaction. The rate law must be determined experimentally or by calculation. It can not just be deduced from the reaction equation.

In this case, the question is incomplete hence we can not deduce the order of reaction with respect to HCl. However, this order of reaction can be obtained by calculation.

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The partial pressure of nitrogen on Venus is approximately 321.914 kPa.

To find the partial pressure of nitrogen on Venus, we need to calculate the partial pressure using the mole fraction of nitrogen and the total atmospheric pressure. First, we convert the total atmospheric pressure from psi to kilopascals (kPa) since the mole fraction is given in terms of kPa.

1 psi = 6.89476 kPa

Therefore, the total atmospheric pressure on Venus is:

1334 psi × 6.89476 kPa/psi = 9197.53 kPa

Next, we can calculate the partial pressure of nitrogen using the mole fraction. The mole fraction of nitrogen is given as 0.035, which means that nitrogen makes up 3.5% of the total moles of gas in the atmosphere.

The partial pressure of nitrogen is given by:

Partial pressure of nitrogen = Mole fraction of nitrogen × Total atmospheric pressure

Partial pressure of nitrogen = 0.035 × 9197.53 kPa

Partial pressure of nitrogen = 321.914 kPa

Therefore, the partial pressure of nitrogen on Venus is approximately 321.914 kPa.

It's important to note that the given atmospheric composition of Venus's atmosphere and the total atmospheric pressure are approximate values and can vary depending on specific conditions and measurements.

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Answer:

0.125 mg

Explanation:

The correct answer would be 0.125 mg

According to the conversion factor, one milligram of a sample is equivalent to one thousand micrograms of the same sample.

milligram = \(10^{-3}\)

microgram = \(10^{-6}\)

Hence,

1 milligram = 1000 micrograms or 1 microgram = \(10^{-3}\) milligram

Therefore, 125 micrograms will be:

  125/1000 = 0.125 milligram

Step 1 - We need to know how to write the equation that represents the neutralization reaction that occurred and balance it correctly. Neutralization reactions follow the following scheme: acid + base -> salt + water.

In this case, the acid is nitric acid (HNO3) and base is NaOH.

The equation is:

HNO3 + NaOH -> NaNO3 + H2O

Note that the equation is already balanced. Balancing the equation correctly is important because we need to look at the stoichiometric ratio between the reactants, which in this case is 1 : 1.

Step 2 - We need to relate the obtained data. Since a total neutralization reaction took place, this means that the number of H+ ions and OH- ions present in the solution became equal. So we have:

nHNO3 = nNaOH

where n is the number os moles.

Knowing that n = M . V, where:

M is the concentration in mol/L and V is the volume in mL, we can perform the following substitution:

MHNO3 . VHNO3 = MNaOH . VNaOH

2.75 x VHNO3 = 2.94 x 486.8

VHNO3 = 520.4 mL

Note that it was not necessary to change the volume units from mL to L because they cancel out in the formula.

Answer: VHNO3 = 520.4 mL

Answer:

Acid :

1) they are sour in taste

2) if we put litmus paper in an acid they turn blue litmus to red and ( red litmus paper colour doesn't change )

3) acids use to react with metals

4) it releases hydrogen (H+) when dissolved in water

5) example : Hydrochloric acid , sulphuric acid , nitric acid etc..

base :

1) they are bitter in taste

2) and the red litmus paper trunes to blue and ( red litmus paper colour doesn't change )

3) it doesn't react with metals

4) it releases hydroxide (OH+) when dissolved in water

5 example : sodium hydroxide, potassium hydroxide etc...

CF2Cl2 (Carbon difluoride) has the following Lewis structure:

         F

        / \

C = Cl - Cl

        \ /

         F

1. Number of electron groups on the central atom (Carbon, C): 4 (2 single bonds to Fluorine and 2 double bonds to Chlorine), 2. Number of lone pairs on the central atom (Carbon, C): 0, 3. Electron geometry: tetrahedral, 4. Shape: bent or angular.

A central carbon atom is joined to two fluorine and two chlorine atoms to form the chemical compound CF2Cl2. We can depict this molecule's bonding using its Lewis structure, which displays the location of its electrons.

1. The actions listed below must be taken in order to ascertain the Lewis structure of CF2Cl2:

Calculate the molecule's valence electron count. The number of valence electrons for each element in the molecule can be added to achieve this. With 4 valence electrons for carbon, 7 for fluorine, and 7 for chlorine, a total of 25 valence electrons are present.

2. Position the atoms in the molecule so that the other atoms are positioned around the core atom (carbon, C).  In this case, we have C surrounded by 2 F and 2 Cl atoms.

3. Where double bonds are required, connect the core atom to the outside atoms using single bonds. Since a double bond consists of two pairs of electrons, the chlorine atoms form double bonds with the central carbon atom since they each have seven valence electrons. Since a single bond consists of one pair of electrons and the fluorine atoms each have seven valence electrons, they can only form single bonds with the center carbon atom.

4. Assign the remaining electrons in lone pairs to the center atom. Since all 25 valence electrons in this situation have been spent in bonding, there are no more electrons to designate as lone pairs.

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Ideal gas law is valid only for ideal gas not for vanderwaal gas. Since temperature is constant, boyle's gas law is used here. Therefore 592.6ml is the final volume.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of gas

V= volume of gas

n =number of moles of gas

T =temperature of gas

R = Gas constant = 0.0821 L.atm/K.mol

At constant temperaure

P₁V₁=P₂V₂

V₁= 675.0 mL

P₁=0.878 atm

V₂=?

P₂=1atm

substituting all the given values we get

0.878 atm×675.0 mL=1atm×V₂

592.6ml=V₂

Therefore 592.6ml is the final volume.

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Answer:

an element.

Explanation:

When all the atoms contain a nucleus with the same amount of protons then each atom is classified as the same element. Hence multiple atoms and a larger quantity of atoms of the same element is still just the same single element.

Answer: science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe

Explanation:

Answer:

Science is a very Idiot subject and doing dimag ka dahi xD

Answer:

The concentration is 2.277

Explanation:

The formula for finding the concentration of a solution is C= mole of solute divided by the volume of the solution

Therefore, C= 2.05/0.900

C=2.277

Answer:

Air temperature is not accurate but it can measure by how hot or cold the air is

The number of moles of NaOH is calculated by multiplying the moles of KHP by the mole ratio of NaOH to KHP, which is found by the balanced chemical reaction previously discussed.

A titration is described as "the process of determining the amount of a substance A by adding calibrated increments of substance B, the titrant, with which it reacts until exact chemical equivalency is obtained (the equivalence point)" (Oxford Dictionary of Chemical Terms).

The moles of KHP are multiplied by the mole ratio of NaOH to KHP, which is determined by the balanced chemical reaction mentioned above, to determine the number of moles of NaOH. 3. To determine the molarity of the NaOH solution, divide the moles of NaOH by the amount of NaOH solution needed to reach the titration's endpoint, in this case, litres.

The formula is molarity (M) of the acid x volume (V) of the acid = molarity (M) of the base x volume (V) of the base when the titrant and analyte have a mole ratio of 1:1. The concentration of a solution, measured in moles of solute per litre of solution, is known as its molarity.

Ha has a 268-gram mass per mole in its molar form. Ha is not a recognised chemical symbol for an element.

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Answer:

Hello, The answer to your question is,

D. comparison

Explanation:

I hope this helps |^_^|

The most likely formula for the compound between sulfur and aluminum predicted by Lewis theory is Al₂S₃. Option C is correct.

According to Lewis theory, atoms tend to form compounds by sharing electrons to achieve a stable electron configuration. Sulfur has six valence electrons and can form two covalent bonds with aluminum, which has three valence electrons.

Aluminum can donate its three electrons to sulfur, forming three covalent bonds. The resulting compound is Al₂S₃, where two aluminum atoms are bonded with three sulfur atoms through covalent bonds. Therefore, Al₂S₃ is the most likely formula for the compound between sulfur and aluminum predicted by Lewis theory. Option C is correct.

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Answer: Ba + Co(CN)₃ → Ba(CN)₂ + Co₂O₃

Explanation:

Barium reacts with cobalt (III) cyanide to produce barium cyanide and cobalt (III) oxide according to the following chemical equation:

Ba + Co(CN)₃ → Ba(CN)₂ + Co₂O₃

It is a type of displacement reaction.

Food safety guidelines recommended that a beef rib roast bone in should cook for 23.0 minutes per pound based on 325°F oven setting. 2 hours should it take to cook a 5.17 pound roast.

Food safety is concerned with how food is handled, stored, and prepared in order to prevent infection and ensure that our food contains enough nutrients for us to maintain a healthy diet.

It takes 23 min per one lb (pound)

Then it takes how many min for 5.17 pound

= 23 min / pound x 5.17pound

= 118.91 min x 1hr / 60 min

= 1.982hr

≅ 2 hrs

Thus, 2  hours should it take to cook a 5.17 pound roast.

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Answer:

An atom is the smallest particle of an element that still has the properties of that element. Atoms, in turn, are composed of subatomic particles, including negative electrons, positive protons, and neutral neutrons. The number of protons in an atom determines the element it represents.

Explanation:

The smallest possible particle of an element is a atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons.

The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. Electric forces, which link electrons towards the nucleus of atoms, cause them to be drawn to any positive charge.

Space makes up the majority of an atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons. Compared to electrons, that are the smallest charged particles in nature, the nucleus is tiny and dense.  

Therefore, the smallest possible particle of an element is a atom.

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Answer:

9.9 x 10^-2 g*cm²/s²

Explanation:

9.9 × 10^-9 kg*m²/s² =    g*cm²/s²

1 kg*m²/s² = 1 joule(s)

1 g*cm²/s² = 1 erg(s)

britannica

1 kg = 1000g = 1x10^3 g

1 m²= 10000 cm² = 1x10^4 cm²

add the exponents 3 and 4 which = 7

-9 + 7 = -2

9.9 × 10^-9 kg*m²/s² = 9.9 x 10^-2 g*cm²/s²

3.93 and 72.2%

Explanation:

Theoretical Yield:

\(3.07 \: g \: SO₂ \times \frac{1 \: mol \: SO₂}{64.07g \: SO₂} \times \frac{1 \: mol \: H₂SO₃}{1 \: mol \: SO₂} \times \frac{82.09 \: g \: H₂SO₃}{1 \: mol \:H₂SO₃ } = 3.933 \: g \: H₂SO₃\)

Percent Yield:

\( \frac{2.84 \: g}{3.993 \: g} \times 100 = 72.2\%\)

The pressure of the gas is 8.442 atm.

We can use the ideal gas law to solve for the pressure of the gas:

PV = nRT

Where

First, we need to convert the temperature from Celsius to Kelvin:

T = -57°C + 273.15 = 216.15 K

Now, we can plug in the given values and solve for P:

P = (nRT) / V

P = (2 mol x 0.08206 L·atm/(mol·K) x 216.15 K) / 4 L

P = 8.442 atm

Therefore, the pressure of the gas is 8.442 atm.

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6.72L is the volume occupied by 0.3 mole of hydrogen chloride. A measurement of three-dimensional space is volume.

A measurement of three-dimensional space is volume. It is frequently expressed quantitatively using SI-derived units, like the cubic foot and litre, or different imperial or US-standard units, including the gallon, quart and cubic inch. Volume and length (cubed) have a symbiotic relationship. A container's capacity is typically thought of as being represented by its volume.

Volume = 0.3×22.4

            =6.72L

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Answer:

CH4 (g) and O2 (g) are both in the gaseous state, while CO2 (g) and H2O (g) are also in the gaseous state.

In the above reaction, the reactants are in the gaseous state, and the products formed are also in the gaseous state.

Every compound in a chemical reaction can be in any state of matter like solid, liquid, or gas. In the reaction of methane and oxygen, the initial state of the reactants is in the gaseous form. The chemical reaction of methane and oxygen is given by the equation CH4 (g) + 2 O2 (g) -> CO2 (g) + 2 H2O (g).Here, methane and oxygen are the reactants, and carbon dioxide and water are the products. Methane (CH4) and oxygen (O2) react together in the presence of a spark or heat to produce carbon dioxide (CO2) and water (H2O).In the reaction, the methane gas combines with oxygen gas, which causes the release of heat energy and forms carbon dioxide gas and water vapor. Methane gas is a colorless and odorless gas that burns cleanly and is one of the primary components of natural gas.

The oxygen gas required for the reaction is available in the atmosphere. Carbon dioxide is a colorless gas with a faint odor and taste and is a significant component of the Earth's atmosphere. Water is a colorless, odorless, and tasteless liquid that is essential to life.The state of matter of every compound in a chemical reaction can change depending on the conditions in which the reaction occurs. For instance, a substance that is in the solid state at a lower temperature may melt into a liquid or boil into a gas at a higher temperature. Similarly, a liquid may freeze into a solid or vaporize into a gas under different conditions.

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Se producirán 36 gramos de agua

Explicación: Ya que en una reacción química no puede descubrir ningún cambio en masa total de las sustancias que en ella intervienen, pues en una reacción química ni se gana ni se pierde masa.  

It is the primary source which helps the students to relate in a personal way to events of the past and promote a deeper understanding of history as a series of human events. The primary source is better, because it contains more charts. The correct option is B.

The sources which are closest to the origin of the information and contain raw information which must be interpreted by the researches are called the primary sources. The secondary sources are closely related to the primary sources and often interpret them.

A direct access to the subject of our research is given by the primary source whereas the secondary source provides only second hand information and comments of other researches.

Thus the correct option is B.

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Answer:

the size of an object changes with a change in temperature.

Explanation:

Answer: D

Explanation:

liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome attractions in the liquid.

Answer:

D. A liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome attractions in the liquid.

Explanation:

Correct on Edge 2022!!!

Good luck everyone, you got this! Have a great day!

Answer:

250 cm ^3

Explanation:

a. The Mass of water driven off = 0.15 g

b. Moles of anhydrate = 0.00257 moles

c. Moles of water driven off is 0.00833 moles

d. There are 3 moles of water within the crystalline structure of one molecule of the hydrated salt.

e. The molecular formula of the hydrated salt will be X.3H₂O

a. The mass of water driven off from the hydrated salt is:

Mass of water driven off = 0.5 g - 0.35 g

Mass of water driven off = 0.15 g

b. Molecular mass of salt = 136 g/mol

moles of anhydrate = 0.35/136

Moles of anhydrate = 0.00257 moles

c. Moles of water driven off = mass/molar mass

molar mass of water = 18 g/mol

Moles of water driven off = 0.15/18

Moles of water driven off = 0.00833 moles

d. Moles of water within the crystalline structure of one molecule of the hydrated salt is determined by converting to whole number mole ratio by dividing with the smallest ratio,

Salt to water ratio = 0.00257 /0.00257  :  0.00833/0.00257

Salt to water ratio = 1 : 3

Therefore, there are 3 moles of water within the crystalline structure of one molecule of the hydrated salt.

e. Assuming the anhydrous salt is X, the molecular formula of the hydrated salt will be X.3H₂O

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