six line to obtain energy​

I think it's b

let's work out empirical formula:

CO2 + H20 is CH2O3

the mass of CH2O3 is 12+2+(16×3)=62

work out mass of CO2

mass=number of moles × relative formula mass

mass=1.5 mol × 44 = 66

work out mass of H20

mass=number of moles × relative formula mass

mass=2 × 18 = 36

so the molecular formula is 66+36=102

to calculate simplest molecular formula:

molecular formula mass/empirical formula mass

102/62=2 (rounded to nearest whole number)

back to the empirical formula which is CH2O3

multiply each element by 2 which is

C2H4O6

answer:C2H4

not 100% sure though, but I hope it's been of some use to you:)

Mass of CO_2

\(\\ \sf\longmapsto No\:of\:moles(Molar\:mass)\)

\(\\ \sf\longmapsto 44(1.5)\)

\(\\ \sf\longmapsto 66g\)

And

Mass of H_2O

\(\\ \sf\longmapsto 2(18)=36g\)

Total mass of products

\(\\ \sf\longmapsto 66+36=102g\)

EMPIRICAL FORMULA:-CH_2O_3

\(\\ \sf\longmapsto 12+2(1)+3(16)=12+2+48=62g\)

We need n now

\(\\ \sf\longmapsto n=\dfrac{Molecular\:mass\:of\; products}{Empirical\: formula\:mass}\)

\(\\ \sf\longmapsto n=\dfrac{102}{62}\)

\(\\ \sf\longmapsto n=1.64\approx 2\)

Now

\(\\ \sf\longmapsto Molecular\: formula=n(Empirical\: formula)\)

\(\\ \sf\longmapsto 2(CH_2O_3)\)

\(\\ \sf\longmapsto C_2H_4O_6\)

It's Ethene Oxide .

Answer is Ethene(C_2H_4)

Option B is correct

Answer: A. protons in the atom

Explanation: I just took the test and got a 100% so this should be right. Unless the question is worded differently than mine then it should be right. Hope this helps :)

Answer:

A

Explanation:

Answer:

81.26% is the percent yield

Explanation:

Based on the reaction:

CaCl₂ + Na₂CO₃ → 2NaCl + CaCO₃

Where 1 mole of CaCl₂ in excess of sodium carbonate produces 1 mole of calcium carbonate.

To solve this question we must find the moles of CaCl2 added = Moles CaCO₃ produced (Theoretical yield). The percent yield is:

Actual yield (0.366g) / Theoretical yield * 100

Moles CaCl₂ = Moles CaCO₃:

0.0500L * (0.0900moles / L) = 0.00450 moles of CaCO₃

Theoretical mass -Molar mass CaCO₃ = 100.09g/mol-:

0.00450 moles of CaCO₃ * (100.09g / mol) = 0.450g of CaCO₃

Percent yield = 0.366g / 0.450g * 100

81.26% is the percent yield

Answer:

active energy

*Energy associated with something moving or changing in some way

potential energy

potential energy *stored energy that depends upon the relative position of various parts of a system

similarities between active and potential energy

*they can both be converted into each other's form of energy

The volume of a 0.141 m calcium hydroxide solution required to neutralize 25.2 ml of a 0.372 m hydrochloric acid solution is  33.242 ml.

Neutralization or neutralization is a chemical reaction wherein an acid and a base react quantitatively with each other. In a reaction in water, neutralization consequences in there being no excess of hydrogen or hydroxide ions present inside the answer.

A neutralization reaction is when an acid and a base react to form water and salt and involves the aggregate of H+ ions and OH- ions to generate water. The neutralization of a robust acid and sturdy base has a pH the same as 7.

calculation:-

Concentration  Ca(oH)₂ M₁ = 0.141 M

valance factor n₁ = 2

Volume V₁ of Ca(oH)₂ = ?

concentration  Hcl M₂ = 0.372 M

valance factor n₂ = 1

The volume V₂ of HCl = 25.2 ml.

n₁M₁V₁ = n₂M₂V₂

V₁ = n₂M₂V₂ / n₁M₁

     = (1×0.372 × 25.2) / 2× 0.141

    = 33.242 ml

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The correct statement will be"The largest source of background ionizing radiation in the United States is Radon (Rn)which is formed in the decay series of uranium."

Generally, Ionizing radiation is simply defined as a state of energy that works by releasing electrons from their parent atoms or the molecules of materials.

In conclusion, Radon (Rn) a chemical element of Group 18 in the periodic table is the largest source of background ionizing radiation in the United States.

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3.50 mol of iron contains roughly 2.11 x 10²⁴ iron (Fe) atoms.

To determine the number of atoms of iron (Fe) in 3.50 mol, we can use Avogadro's number, which is defined as the number of particles (atoms, molecules, or ions) in one mole of a substance. Avogadro's number is approximately 6.022 x 10²³ particles per mole.

To calculate the number of atoms of iron in 3.50 mol, we can use the following equation:

number of atoms = number of moles x Avogadro's number

Plugging in the given values, we get:

number of atoms = 3.50 mol x 6.022 x 10²³ atoms/mol

Simplifying this expression, we get:

number of atoms = 2.11 x 10²⁴ atoms

Therefore, there are approximately 2.11 x 10²⁴ atoms of iron (Fe) in 3.50 mol of iron.

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Answer:

B  

Explanation:

Answer:

answers

B

Explanation:

Explicaciónexplicacaca

Answer:

Found in every living cell

The best amine for preparing an enamine derivative from cyclohexanone would be a secondary amine, which has two alkyl groups attached to the nitrogen atom. The amine should be a weak base, so it does not react strongly with the carbonyl group of cyclohexanone, but it should be basic enough to form the enamine product.

Of the choices given, diethylamine is the best amine for this reaction. It is a secondary amine and a weak base, and its alkyl groups are small enough to allow for the formation of the enamine product.

Ethylamine is a primary amine and may react too strongly with the carbonyl group, leading to the formation of unwanted byproducts. Triethylamine is a strong base and may react too strongly with the carbonyl group, leading to the formation of a different product. Hydroxylamine is not an amine and would not react with the carbonyl group to form an enamine derivative.

Therefore, diethylamine is the best choice for preparing an enamine derivative from cyclohexanone.

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Answer:

A, And D

Explanation:

I did this before and i got it right ❤

Empirical formula of ascorbic acid Vitamin C or ascorbic acid is an important nutrient required for healthy growth and development.

The molecular formula of ascorbic acid is C6H8O6. The percentage composition of elements in ascorbic acid is as follows:40.92% of Carbon4.58% of Hydrogen54.50% of Oxygen. To find the empirical formula of ascorbic acid, you need to assume that you have 100 grams of the compound. So, the mass of each element is as follows: Carbon: 40.92 gramsHydrogen: 4.58 gramsOxygen: 54.50 gramsConvert the mass of each element into moles by dividing it by its molar mass. Carbon: 40.92/12.01 = 3.41 moles Hydrogen: 4.58/1.01 = 4.54 molesOxygen: 54.50/16.00 = 3.41 molesNow divide each of the mole values by the smallest mole value, which is 3.41 in this case.Carbon: 3.41 / 3.41 = 1Hydrogen: 4.54 / 3.41 = 1.33Oxygen: 3.41 / 3.41 = 1The mole ratio of C:H:O atoms in the empirical formula is 1:1.33:1.The empirical formula of ascorbic acid is CH4O3.The molecular formula for ascorbic acidThe molecular mass of ascorbic acid is given as 176 amu. The molecular formula is the main answer we're looking for. To find it, you need to divide the molecular mass of ascorbic acid by the empirical formula mass.C6H8O6 empirical formula mass = 12.01 × 6 + 1.01 × 8 + 16.00 × 6 = 176.06 amu. Molecular formula = empirical formula × n176 amu = 176.06 amu × n = n × empirical formula empirical formula is CH4O3 n=5The chemical formula of ascorbic acid is C5H5O5.

The empirical formula of ascorbic acid is CH4O3 and the chemical formula for ascorbic acid is C5H5O5.

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14.4 grams of Fe will form when 235 kJ of energy is released in this reaction.

To solve this problem, we need to use the given reaction and its enthalpy change to find the amount of Fe formed when 235 kJ of energy is released.

First, we need to balance the equation:

2 Al(s) + 3 Fe2O3(s) -> 3 Fe(s) + 2 Al2O3(s)

We can see that for every 3 moles of Fe2O3, we get 3 moles of Fe. So, we need to convert the energy released (235 kJ) to moles of Fe2O3:

-852 kJ = -3 moles of Fe2O3

1 kJ = 3/(-852) moles of Fe2O3

235 kJ = 3/(-852) x 235 moles of Fe2O3

235 kJ = -0.773 moles of Fe2O3

Now, we can use stoichiometry to find the amount of Fe formed:

3 moles of Fe -> 1 mole of Fe2O3

1 mole of Fe -> 1/3 mole of Fe2O3

Therefore,

1/3 mole of Fe2O3 = 0.773 moles of Fe2O3

0.773 moles of Fe2O3 x (1 mole of Fe/3 moles of Fe2O3) = 0.258 moles of Fe

Finally, we can use the molar mass of Fe to convert moles to grams:

0.258 moles of Fe x 55.85 g/mol = 14.4 grams of Fe

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Answer:

If the atom has more electrons than protons, it is a negative ion or ANION. If it has more protons than electrons, it is a positive ion.

Explanation:

Positive ions are typically metals or act like metals. Many common materials contain these ions. Mercury is found in thermometers, for instance, and aluminum is a metal that is found in a surprising amount of things.

The volume of insulation material required is approximately 0.003606 cubic meters (m³).

To calculate the volume of insulation material, we can subtract the volume of the inner pipe (original pipe) from the volume of the outer pipe (original pipe + insulation).

Given:

Length of the pipe, L = 10 m

Radius of the pipe, r = 7 cm = 0.07 m

Thickness of the insulation, dr = 2 mm = 0.002 m

The outer radius of the larger pipe is R = r + dr.

Using the formula for the volume of a cylinder, V = π(R² - r²)L, we can substitute the values and calculate:

V = π((0.07 + 0.002)² - 0.07²) × 10

V ≈ 3.606 × 10⁻³ m³

Therefore, the volume of insulation material required is approximately 0.003606 m³ (cubic meters).

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Answer:

a. 25.5 moles of Pb will be formed.

b. 54.8 moles of PbO are needed.

c. PbS is the limiting reactant.

Explanation:

1st) It is necessary to write the balanced chemical reaction:

From the balanced chemical reaction we know that 1 mole of PbS reacts with 2 moles of PbO to produce three moles of Pb and 1 mole of SO2.

2nd) Using the stoichiometry of the reaction and a mathematical rule of three, we can calculate the moles of Pb that will be produced from 17 moles of PbO and excess of PbS:

So, 25.5 moles of Pb will be formed.

3rd) Using the stoichiometry of the reaction and a mathematical rule of three, we can calculate the moles of PbO that are needed to make 27.4 moles of SO2 in excess of PbS:

So, 54.8 moles of PbO are needed.

4th) Using the stoichiometry of the reaction we can calculate the limiting reactant:

- Calculation from 17.6 moles of PbS:

From the stoichiometry of the reaction 1 mol of PbS reacts with 2 moles of PbO, so the 17.6 moles of PbS will need 35.2 moles of PbO to react properly, but we have 36g of PbO, so PbO will be the excess reactant and PbS the limiting reactant.

- Calculation from 36 moles of PbO:

We can do this calculation to confirm the previous one:

In this case, we can see that 36 moles of PbO will need 18 moles of PbS to react properly, but we only have 17.6 moles of PbS. Here we confirm that PbS is the limiting reactant.

Answer:

It falls in Liquid and Solid.

Explanation:

Answer:

D would be the best answer

Explanation:

Among the given options example of force acting between two objects is gravity by which an object attracts other objects into its center of mass.

Force is an external agent acting on a body to change it state or motion or rest or to deform it. There are different kinds of forces such as, gravitational force, frictional force, nuclear , magnetic force etc.

Gravitational force is the force by which an object attracts other objects into its center of mass. Earth attracts every objects on its surface into it. This effect is called gravity.

Force of gravitation depends on the mass of both objects and distance between them. Greater the mass, greater will be the force of gravity exerted on it. Thus, option D is correct.

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The nuclear equation given represents an example of fission.

A nuclear reaction is a process such as the fission of an atomic nucleus, or the fusion of one or more atomic nuclei and/or subatomic particles in which the number of protons and/or neutrons in a nucleus changes.

In the reaction, products may contain a different element or a different isotope of the same element.

According to this question, a nuclear reaction is given such that uranium-235 breaks down into Barium-141 and Krypton-92. This shows that it is an example of fission.

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Answer: decomposition

Explanation:

Based on ecological studies, the definitions below applies to the given terms:

Ecology is the study of living things and their interactions with their environment.

Some terms in ecology include:

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Answer:

A

Explanation:

The products of a chemical equation is what is being experimented with. However, the results in which you get are known as your solution.

Answer:

If an object is at rest, then there are no forces acting on the object. It would take an unbalanced force to keep an object in motion at a constant velocity. It is the natural tendency of all objects to eventually come to a rest position.

Explanation:

Answer:0

Explanation: zero because it is the most stable form of oxygen in its standard state

Taking into account the definition of reactivity, the correct option is the first option: Metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced.

Reactivity is a measure of the probability that a chemical species will participate in a chemical reaction to form chemical bonds.

In other words, the reactivity of a chemical element is the tendency that this element has to combine with others.

For elements that behave like metals, this trend is directly related to the ease with which they lose their valence electrons.

Valence electrons are those electrons farthest from the nucleus of the atom. These electrons are easier to remove because they are the least attracted to the nucleus. Thus, less and less energy is needed to start these valence electrons, so they can commonly participate in the formation of chemical bonds.

In other words, as the size of the metal atoms in a group increases, so does their reactivity.

Then, the correct option is the first option: Metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced.

Learn more:

Answer:

that can be established only by changing a substance's chemical

Explanation:

Answer:

A chemical property is a characteristic of a substance abserved in chemical reactions.

Explanation:

Some major chemical properties include flammability, toxicity, heat of combustion, pH value, rate of radioactive decay, and chemical stability.

A decrease in free hydrogen ion concentration (H⁺) in the serum results in an increase in serum pH, and an increase in serum alkalinity.

A hydrogen ion is an ion that is created when a hydrogen (H) atom either loses or gains an electron. The concentration of this ion would affect the pH of the aqueous solution that it is in; as the concentration increase, the pH would decrease.

While a base provides hydroxide ions (OH⁻) that will combine with hydrogen ions to reduce their concentration (which results in a raising pH), an acid will simply increase the H⁺ concentration, usually by having one of its hydrogen atoms dissociate.

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Answer:

Isotopes

Explanation:

An isotope are the atoms of an element with similar chemical identity and number of protons but different atomic masses. This means that isotopes of an element differ from one another by their number of NEUTRONS.

For example, the uranium element possesses isotopes as follows: Uranium-235 and uranium-238. This two isotopes have the same chemical identity and number of protons/atomic no., which is 92. However, the atomic masses (235 and 238) are different.

Answer:

Isotopes

Explanation:

The mass of 11.2 L of H2 gas at STP is 1.008 grams.

To find the mass of hydrogen gas in 11.2 L, we need to use the ideal gas law, which relates the pressure (P), volume (V), number of moles (n), and temperature (T) of a gas:

PV = nRT

where R is the gas constant.

To solve for the mass of H2, we need to know the pressure, temperature, and number of moles of the gas. Let's assume that the H2 is at standard temperature and pressure (STP), which is 0 degrees Celsius (273.15 K) and 1 atmosphere of pressure (101.3 kPa).

At STP, 1 mole of any gas occupies 22.4 L of volume. Therefore, the number of moles of H2 in 11.2 L can be calculated as:

n = (11.2 L) / (22.4 L/mol) = 0.5 mol

Now we can use the molar mass of hydrogen (2.016 g/mol) to convert the number of moles to mass:

mass = n x molar mass = 0.5 mol x 2.016 g/mol = 1.008 g

Therefore, the mass of 11.2 L of H2 gas at STP is 1.008 grams.

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Potassium, a metal with one electron in the outermost shell, will react with one chlorine atom.

Potassium (K) has one electron in its outermost shell, while chlorine (Cl) has seven electrons in its outermost shell. To achieve a stable electron configuration, potassium will readily lose its single outermost electron, while chlorine will readily gain one electron to fill its outermost shell.

In the process of chemical bonding, potassium will donate its electron to chlorine, forming an ionic bond. This results in the formation of a potassium ion (K+) and a chloride ion (Cl-).

Since one potassium atom reacts with one chlorine atom, the reaction between potassium and chlorine will result in the formation of one potassium chloride compound.

Therefore, one potassium atom will react with one chlorine atom.

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