How would one make a 2 M solution of a compound?
O A. By dissolving 1 molar mass of the compound in 2L of water
OB. By dissolving 2 moles of the compound in 1 L of water
Oc. By dissolving 2 g of the compound in 1 L of water
D. By dissolving 1 mole of the compound in 2 L of water

We know the standard reduction potentials of the half-cells involved, so we can find the cell voltage and the spontaneous reaction. Thus;

The anode reaction is:

Pb(s) → Pb2+(aq) + 2e-

This is the oxidation half-reaction that occurs in the Pb half-cell.

The cathode reaction is:F2(g) + 2e- → 2F-(aq).

This is the reduction half-reaction that occurs in the F2 half-cell.

The spontaneous cell reaction is

:Pb(s) + F2(g) → Pb2+(aq) + 2F-(aq).

This is the combination of the oxidation and reduction half-reactions, with the electrons canceled out from both sides.

The cell voltage is 2.996 V The standard cell potential is calculated as follows:

standard cell potential = E°(reduction) - E°(oxidation)standard cell potential = 2.870 V - (-0.126 V)standard cell potential = 2.996 V, The cell voltage is positive, indicating that the reaction is spontaneous.

To know more about oxidation half-reaction visit;

https://brainly.com/question/12686471

#SPJ11

Molecular formular for C3H8O ( Isopropyl alcohol)

comprises of 3 Carbon, 8 Hydrogen and 1 oxygen ,

So, first box =3

second box = 8

third box = 1

emperical mass c3h80 =( 3*12) + (1*1) + (1*15.99) = 53.03 g/mole

Molecular formular = molecular weight / emperical mass

= 60.10g/mole /53.03g/mole = 1.133

if we multiply subscripts numbers ; we still get

Molecular formula = C3H8O

However, the second option doesnt have the option of 8 hydrogen .

Answer:

a usually reversible change in the physical properties of a substance, as size or shape:

Freezing a liquid is a physical change.

Explanation:

Answer:

Hey!

Explanation:

The definition of physical change can be expressed as.. let's say.. the physical difference in an organism. Physical change affects the form of a chemical substance, but not its chemical composition. Hope this helps! :)

This is how far away from the ammonia-dampened plug\(&x=51.7 \mathrm{~cm} f r 0 \mathrm{~m} \mathrm{NH}\)

Given,

molar mass of \($\mathrm{HCl}=36.5$\)

molar mass of \($\mathrm{NH}_3=17$\)

Now, Rate \($\propto \frac{1}{\sqrt{\text { molar mass }}}$$$\)

\(\frac{\text { Rate of } \mathrm{NH}_3}{\text { Rate of } \mathrm{HCl}} &=\sqrt{\frac{36.5}{17}}=\sqrt{\frac{\text { molar mass of } \mathrm{HCl}}{\text { molar mass of } \mathrm{NH}_3}} \\\)

\(&=\frac{6.04}{4.12}=\frac{1.47}{100}\)

We know,

\(\frac{\text { Distance }}{\text { rate }}=\text { time }\)

Let x = d distance travelled by\($\mathrm{NH}_3$\)

87 - x = distance travelled by \($\mathrm{HCl}$\)

\(&\frac{x}{1.47}=\frac{87-x}{1} \quad \text { (comparing both } \mathrm{NH}_3 \& \mathrm{HCl} \text { ) } \\\)

\(&x=1.47(87-x) \\\)

\(&2.47 x=127.89 \\\)

\(&x=51.7 \mathrm{~cm} f r 0 \mathrm{~m} \mathrm{NH}\) is

Hence, This is how far away from the ammonia-dampened plug\(&x=51.7 \mathrm{~cm} f r 0 \mathrm{~m} \mathrm{NH}\)

To learn more about NH3, refer to:

https://brainly.com/question/14854495

#SPJ1

According to the aufbau principle, the sublevel that is filled after the 5s sublevel is the 4d sublevel. The aufbau principle states that electrons fill the lowest energy level available before filling higher energy levels.

The 5s sublevel is filled before the 4d sublevel because it has a lower energy level. However, once the 5s sublevel is completely filled, the next available sublevel with the lowest energy level is the 4d sublevel.

This is due to the fact that the 4d sublevel has a slightly higher energy level than the 5s sublevel, but it still has a lower energy level than the 5p sublevel. Therefore, the 4d sublevel is filled after the 5s sublevel according to the aufbau principle.

To know more about aufbau principle visit:

https://brainly.com/question/13393709

#SPJ11

The angle by which an optically active compound rotates the plane of polarized light is an important characteristic of such compounds. This angle is given the symbol α and is referred to as the specific rotation of the compound.

An optically active compound is one that rotates the plane of polarized light due to the way it interacts with electromagnetic radiation. This is a property that arises from the asymmetry in the molecule, which results in different interactions with left and right circularly polarized light. As a result, the light waves that pass through the compound are rotated in opposite directions, causing the plane of polarization to shift.

The specific rotation of an optically active compound is determined by measuring the angle of rotation of the plane of polarized light passing through a sample of the compound. The angle of rotation is measured using a polarimeter, which is an instrument that can measure the polarization properties of light.

The specific rotation of a compound is a physical constant that depends on the wavelength of light used and the temperature at which the measurement is made. This property is used to identify and quantify the amount of a particular compound present in a mixture. It is also used to determine the purity and quality of the compound in pharmaceutical and chemical industries.

In summary, the specific rotation is the angle by which an optically active compound rotates the plane of polarized light. This property is measured using a polarimeter and is an important characteristic of such compounds.

To know more about polarized light

https://brainly.com/question/31387471

#SPJ11

To determine the mass of 9.03 x 10^22 atoms of lithium (Li), we need to use the molar mass of lithium and conversion factors.

Given:

Number of atoms of Li = 9.03 x 10^22 atoms

1. Find the molar mass of Li:

The atomic mass of lithium (Li) is approximately 6.94 g/mol. This is the molar mass of Li.

2. Calculate the moles of Li:

Moles = Number of atoms / Avogadro's number

Moles of Li = 9.03 x 10^22 atoms / 6.022 x 10^23 atoms/mol

3. Calculate the mass of Li:

Mass = Moles x Molar mass

Mass of Li = Moles of Li x Molar mass of Li

Substituting the values into the equation:

Mass of Li = (9.03 x 10^22 atoms / 6.022 x 10^23 atoms/mol) x 6.94 g/mol

Calculating the expression:

Mass of Li = 0.103 g

Therefore, the mass of 9.03 x 10^22 atoms of Li is approximately 0.103 grams.

Learn more about  lithium    here:

https://brainly.com/question/32300971

#SPJ11

Answer:

An ionic bond is a chemical bonding involving the attraction between oppositely charged ions

Explanation:

On the periodic table, elements from group 1 and 7 are attracted to each other and when they bond, it's called ionic bonding. This is because of their valence electrons and ions.

Answer:

Ionic bonding is a type of chemical bonding that involves the electrostatic attraction between oppositely charged ions, and is the primary interaction occurring in ionic compounds. It is one of the main types of bonding along with covalent bonding.

The gas is most likely to be Xenon. So the correct option is (a)

The rate of diffusion, is the change in the number of diffusing molecules inside the cell over time i.e. \(d_{n}\) / \(d_{t}\). As the net movement of diffusing molecules depends on the concentration gradient then the rate of diffusion is directly proportional to the concentration gradient (\(d_{C}\)/\(d_{t}\)) across the membrane.

Since,  \(\frac{1}{time}\) \(\alpha\) \(\frac{pressure}{\sqrt{molar weight} }\)

In the given question time required for 0.010 moles of SO₃ is 22 s

Time required for 1 mole of SO₃ is  \(\frac{22}{0.01}\) × 1 = 2200 s

Now,  \(\frac{1}{2200}\) \(\alpha\) \(\frac{1}{\sqrt{80} }\)

For unknown gas

\(\frac{1}{2800}\) \(\alpha\) \(\frac{1}{\sqrt{m} }\)

Now combining both the equation;

Since,

\(\frac{1}{2200}\) × 2800 = \(\frac{1}{\sqrt{80} }\) ×\(\sqrt{m}\)

m = 129.02 g/mole

To know more about rate of diffusion visit:

https://brainly.com/question/12227972

#SPJ4

The metabolic process that occurred in the apparatus of the experiment given in the question is photosynthesis. The graphed results of the experiment are related to the process of photosynthesis.

Photosynthesis is the process in which the green plants use the energy of sunlight to convert carbon dioxide and water into glucose and oxygen. In this process, chlorophyll pigment, present in the chloroplasts of the plant cells, captures the energy of sunlight. This captured light energy is used to convert water and carbon dioxide into oxygen and glucose.

In the experiment mentioned above, the metabolic process that occurred in the apparatus is photosynthesis. It is because spinach leaves were used in the experiment to observe the amount of oxygen (O2) and carbon dioxide (CO2) present in the leaves.

The graphed results of this experiment show that the amount of oxygen in the leaves increased over time while the amount of carbon dioxide decreased. This is because the leaves absorbed carbon dioxide from the air and converted it into glucose and oxygen through the process of photosynthesis. As a result, the amount of oxygen increased over time, and the amount of carbon dioxide decreased. Hence, it can be concluded that the graphed results of the experiment are related to the process of photosynthesis.

More on photosynthesis: https://brainly.com/question/29764662

#SPJ11

Answer:

D.) A measure of disorder

Explanation:

I got it correct on founders edtell

The cellular organelle that is most affected by CO poisoning is mitochondria (option B).

Mitochondria is a cellular organelle found in eukaryotic cells and responsible for the production of energy in form of ATP.

Carbon monoxide (CO) is a common environmental pollutant released when fossil fuels are burned. The major target of this pollutant is the mitochondria.

Carbon monoxide (CO) binds to cytochrome oxidase of the electron transport chain in the mitochondria, thereby, blocking oxidative phosphorylation and ATP production. As ATP declines, there is no energy to drive the breathing muscles.

Learn more about mitochondria at: https://brainly.com/question/14740753

#SPJ4

The three different layers of the skin are the epidermis, the dermis, and the subcutaneous tissue.

Melanocytes are cells in the epidermis that produce and distribute the pigment melanin, which gives color to the skin and helps protect it from the harmful effects of UV radiation.

Dendritic cells are immune cells that reside in the epidermis and function in identifying and presenting foreign antigens to other immune cells.

Merkel cells are specialized cells in the epidermis that combine with nerve endings to form Merkel cell-neurite complexes, which are involved in the sense of touch.

The thicker and more durable skin on the palms of the hands and soles of the feet is called the "stratum lucidum," while the rest of the skin is called the "stratum corneum."

The five layers of the epidermis from deepest to most superficial are:

A helpful mnemonic for remembering the layers of the epidermis is "Come, Let's Get Sun Burned," which stands for:

The three layers of the dermis are the papillary dermis, the reticular dermis, and the subcutaneous layer.

Learn more about layers of the skin at: https://brainly.com/question/12057617

#SPJ1

Answer: D. Are the first to receive energy from a plant.

Explanation: Paying attention to the trophic level in which the food chain occurs is key. Producers are the ones that receive energy directly from the sun. They also make their own food using photosynthesis. A decomposer is the one who breaks down dead matter into chemical nutrients. Therefore, Primary consumers are the first to receive energy from a plant.

I hope this helped!

Good luck <3

Sugar is a simple carbohydrate consisting of carbon, oxygen, and hydrogen molecules which are linked by covalent bonds.

The chemical covalent bonds are a type of chemical bond in which atoms that differ in their electronegativity share electrons to maintain cohesion i.e., intramolecular cohesion, while sugar molecules may interact by glycosidic bonds.

Therefore, with this data, we can see covalent bonds bind atoms in the sugar molecule while glycosidic bonds are those required to connect different sugar and thus form a complex macromolecule or polysaccharide.

Learn more about chemical covalent bonds here:

https://brainly.com/question/3447218

#SPJ1

The missing subscript that will balance the equation is 92.

The given Radioactive decay chemical equation is,

²³⁴U → ²³⁰Th₉₀ + ⁴He₂ + Energy

In the above reaction, the Uranium atom is decayed into the Thorium atom and a helium nucleus is released from Uranium along with energy.

When a bigger atom is unstable, it decays into smaller stable atoms by radioactive decay, one such decay is Alpha Decay.

In Alpha Decay, the mass number of the decaying particle gets reduced by four units and the atomic number of the decaying particle reduces by two. i.e. A helium nucleus is released from the the particle.

So the atomic of the not decayed uranium will be 2 more then the atomic number of thorium.

So, our balanced reaction will be,

²³⁴U₉₂ → ²³⁰Th₉₀ + ⁴He₂ + Energy.

To know more about Alpha Decay, visit,

https://brainly.com/question/1898040

#SPJ9

Answer:

Factors Affecting the Preferential Discharge of Ions in Electrolysis

Answer:

533.12 L

Explanation:

The balanced chemical equation for the decomposition of CaCO₃ is the following:

CaCO₃(s) → CaO(s) + CO₂(g)

According to the equation, 1 mol of CaCO₃ produces 1 mol of gas (CO₂). We convert the moles of CaCO₃ to mass in grams with the molar mass of the compound:

molar mass CaCO₃ = 40 g/mol Ca + 12 g/mol C + (3 x 16 g/mol O)= 100 g/mol

mass of CaCO₃ = 1 mol x 100 g/mol = 100 g CaCO₃

Now, we know that 1 mol of any gas at STP occupies a volume of 22.4 L:

1 mol CO₂ = 22.4 L CO₂

Thus, the stoichiometric ratio is: 22.4 L CO₂/100 g CaCO₃

Finally, we multiply this ratio by the mass of CaCO₃ to calculate how many liters of CO₂ at STP are produced:

2380 g CaCO₃ x 22.4 L CO₂/100 g CaCO₃ = 533.12 L

The 533.12 L of carbon dioxide will be produced at STP if 2380 g of calcium carbonate reacts completely.

The balanced chemical equation for the decomposition of CaCO₃ is the following:

CaCO₃(s) → CaO(s) + CO₂(g)

A balanced chemical reaction is an equation that has equal numbers of each type of atom on both sides of the arrow.

According to the equation, 1 mol of CaCO₃ produces 1 mol of gas (CO₂).

We need to convert the moles of CaCO₃ to mass in grams with the molar mass of the compound:

Molar mass CaCO₃ = 100 g/mol

Mass of CaCO₃ = 1 mol x 100 g/mol = 100 g CaCO₃

Now, we know that 1 mol of any gas at STP occupies a volume of 22.4 L:

1 mol CO₂ = 22.4 L CO₂

Thus, the stoichiometric ratio is:  

\(\frac{22.4 L\; CO_{2} }{100 g \;CaCO_3 }\)

Finally, we multiply this ratio by the mass of CaCO₃ to calculate how many liters of CO₂ at STP are produced:

2380 g CaCO₃ x 22.4 L CO₂/100 g CaCO₃

= 533.12 L

Hence, the 533.12 L of carbon dioxide will be produced at STP if 2380 g of calcium carbonate reacts completely.

Learn more about balanced chemical equations here:

https://brainly.com/question/15052184

#SPJ5

Decane react with 31/2 O₂  to yield 10CO₂ and 11H₂O.

Reaction is given below:-

C₁₀H₂₂ + 31/2 O₂ → 10CO₂ + 11H₂O

Hence, Decane react with 31/2 O₂  to yield 10CO₂ and 11H₂O.

Molecular oxygen, O₂ is a diatomic molecule that is composed of two oxygen atoms held together by a covalent bond. Molecular oxygen is essential for life, as it is used for respiration by many organisms.

Diatomic means that an atom cannot exist by itself. There is no such thing as lone O atoms floating around the atmosphere. Oxygen exists as O₂ .

Learn more about diatomic oxygen gas here:- https://brainly.com/question/14822725

#SPJ9

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 100 g

volume = 12 mL

We have

\(density = \frac{100}{12} = \frac{25}{3} \\ = 8.333333...\)

We have the final answer as

Hope this helps you

The theoretical yield is 0.634 g, the actual yield is 0.0334 g and percent yield is 5.268 %.

2 NaHCO₃(s) → Na₂CO₃(s) + H₂O(l) + CO₂(g)

NaHCO₃ = 1.006 g = (1.006 / 84) moles

Na₂CO₃ = 0.0334 g

Now, 2 moles NaHCO₃ gives 1 mole of Na₂CO₃

∴ (1.006 / 84 ) NaHCO₃ gives ( ? ) mole of Na₂CO₃

 = ( 1 × 1.006 × 106 / 2 × 84 ) g

 = 0.634 g

Theoretical yield = 0.634 g

Actual yield = 0.0334 g

Now, % yield = ( Actual yield / Theoretical yield ) × 100

                      = ( 0.0334 / 0.634 ) × 100

                      = 5.268 %

So, The theoretical yield is 0.634 g, the actual yield is 0.0334 g and percent yield is 5.268 %.

To learn more about Percent yield, Here :

https://brainly.com/question/28758939?referrer=searchResults

#SPJ4

Answer:

4.70 grams of NH4Cl is needed to prepare 350 mL of a 0.25 M ammonium chloride solution.

We need approximately 4.68 grams of NH4Cl to prepare a 0.25 M ammonium chloride solution with a volume of 350 mL.

To determine the mass of NH4Cl needed to prepare the solution, we us use the formula:

m=M x V x MM ... (i)

where,

m= mass in grams

M=molarity of solution

MM= molar mass of compound

V= volume in litres

The number of moles of NH4Cl needed can be calculated using:

  Moles = Molarity x Volume ...(ii)

  Moles = 0.25 mol/L x 0.350 L

  Moles = 0.0875 mol

Hence we can replace M x V with number of moles in equation i.

The molar mass of NH4Cl is :

  Molar mass of NH4Cl = (1 x 14.01 g/mol) + (4 x 1.01 g/mol) + (1 x 35.45 g/mol)

  Molar mass of NH4Cl = 53.49 g/mol

We have all the variables

Putting them in equation i.

Hence,

  Mass (g) = Moles x Molar mass

  Mass (g) = 0.0875 mol x 53.49 g/mol

  Mass (g) = 4.68 g

Therefore, you would need approximately 4.68 grams of NH4Cl to prepare a 0.25 M ammonium chloride solution with a volume of 350 mL.

To learn more about Stoichiometry,

https://brainly.com/question/16060223

Rinse the crystals with approximately 0.5 mL of ice-cold water and remove the rinse with the Pasteur pipette.

Before leaving the laboratory, also record your partner's results in your laboratory notebook. Put your product in an appropriate container Neutralize the filtrate with 1 N your sulfuric acid to destroy any remaining reducing agent.

Put the aqueous filtrate in the appropriate liquid waste container. Dispose of all contaminated Pasteur pipettes melting point and TLC capillaries, and TLC plates in the container for chemically contaminated laboratory debris.

Therefore, Rinse the crystals with approximately 0.5 mL of ice-cold water and remove the rinse with the Pasteur pipette.

Learn more about crystals on:

https://brainly.com/question/13008800

#SPJ4

Answer:

Crushing large stones into smaller stones would be a physical change because you are merily crushing its physical size, while the chemical composition for the stone stayes the same.