What quantity (moles) of NaOH must be added to 1.0 L of 1.8 M HC2H3O2 to produce a solution buffered at pH

Answer: The answer is Molecule bond.

The area of the rectangular painting which is 2890 square centimeters is equivalent to 447.95 square inches

Square inch (in²) is a unit of area equal to the area of a square the sides of which are each one inch long.

Square centimeter (cm²) is another unit of area equal to that of a square of sides 1 centimeter.

The conversion factor of square centimeter to square inches is as follows:

1 square centimetre = 0.155 square inch

2890 square centimeters = 447.95 square inches

Therefore, the area of the rectangular painting which is 2890 square centimeters is equivalent to 447.95 square inches.

Learn more about conversion factor at: https://brainly.com/question/14193413

#SPJ1

Answer: 0.217 mol

Explanation:

To find the amount of moles in a 10 g sample, we need the molar mass of ethanol.

Molar Mass: 46.07 g/mol

Now that we have the molar mass, we can find moles.

\(10.0 g*\frac{1mol}{46.07g}=0.217 mol\)

We know that there are 0.217 mol in a 10.0 gram sample.

This is challenging to provide an exact prediction for the melting and boiling points. Experimental factors, impurities, and other variables can influence these values.

To predict the melting and boiling points for methylamine (CH3NH2), we can consider the differences in molecular structure and intermolecular forces compared to ethane. Methylamine has a nitrogen atom in place of one carbon atom in ethane.

Methylamine exhibits hydrogen bonding due to the presence of the nitrogen atom, which can form hydrogen bonds with other methylamine molecules. Ethane, on the other hand, lacks a hydrogen atom bonded to an electronegative atom, so it does not participate in hydrogen bonding.

Hydrogen bonding is stronger than the London dispersion forces present in ethane. Consequently, methylamine is expected to have stronger intermolecular forces and thus higher melting and boiling points compared to ethane.

Considering this, we can predict that the melting point of methylamine will be higher than -183 °C, the melting point of ethane. Similarly, the boiling point of methylamine will be higher than -89 °C, the boiling point of ethane.

However, without specific experimental data or a detailed analysis of methylamine's properties.

For more such questions on melting

https://brainly.com/question/25074953

#SPJ8

From the information given:

∴

The volume of the sterling silver pendant is:

= 61.3 mL - 50.0 mL

= 11.3 mL

Since, 1 mL = 1cm³

Then;

11.3 mL = 11.3 cm³

Using the relation for Density; i.e.

\(\mathbf{Density = \dfrac{mass}{volume}}\)

\(\mathbf{10.25 \ g/cm^3= \dfrac{mass}{11.3 \ cm^3}}\)

mass = 10.25 g/cm³× 11.3 cm³

mass of the sterling silver = 115.825 grams

Recall that sterling silver has:

∴

The mass of the copper contained in the sterling silver pendant can be calculated as:

\(\mathbf{= \dfrac{115.825 \ g \times 7.5}{100}}\)

= 8.687 grams

Therefore, we can conclude that the mass of the copper contained in the sterling silver pendant is 8.687 grams

Learn more about the relation between Density, Mass, and Volume here:

https://brainly.com/question/24386693?referrer=searchResults

Answer:How can you tell how much gas is in these containers?

Small gas tanks are often used to supply gases for chemistry reactions.  A gas gauge will give some information about how much is in the tank, but quantitative estimates are needed so the reaction will be able to proceed to completion.  Knowing how to calculate needed parameters for gases is very helpful to avoid running out too early.

Conversions Between Moles and Gas Volume

Molar volume at STP can be used to convert from moles to gas volume and from gas volume to moles.  The equality of 1 mole = 22.4 L is the basis for the conversion factor.

Sample Problem One: Converting Gas Volume to Moles

Many metals react with acids to produce hydrogen gas.  A certain reaction produces 86.5 L of hydrogen gas at STP.  How many moles of hydrogen were produced?

Step 1: List the known quantities and plan the problem.

Known

86.5 L H2

1 mol = 22.4 L

Unknown

moles of H2

Apply a conversion factor to convert from liters to moles.

Step 2: Calculate.

Explanation:

Answer:

By finding see mass and Volume

Explanation:

If you divide mass and volume I'm pretty sure you could find the density

Mescaline produces a wide range of psychoactive effects when ingested, including altered perception of reality, hallucinations, and euphoria. It is a powerful psychedelic drug that has been used for centuries by Native American tribes in spiritual ceremonies

Mescaline is a hallucinogenic alkaloid that is derived from the Peyote cactus. Mescaline is a complex organic molecule that can be synthesized in the laboratory from 3,4,5-trimethoxybenzyl bromide in two steps.The first step involves nucleophilic substitution using sodium cyanide, and the second step is a reduction using lithium aluminum hydride (LAH).Here's how mescaline can be synthesized from 3,4,5-trimethoxybenzyl bromide:Step 1: Nucleophilic substitution using sodium cyanideThe reaction of 3,4,5-trimethoxybenzyl bromide with sodium cyanide results in the formation of the nitrile derivative. NaCN serves as the nucleophile in this reaction, and it replaces the bromide ion.The mechanism for this reaction involves the following steps: A nucleophilic attack by the cyanide ion on the benzyl bromide. The carbon-bromine bond breaks, and the benzyl cation is formed. A second nucleophilic attack by the cyanide ion occurs on the benzyl cation, resulting in the formation of the nitrile derivative.Here's the reaction equation for this step:Step 2: Reduction using lithium aluminum hydrideThe next step is the reduction of the nitrile derivative using LAH. LAH serves as a strong reducing agent in this reaction and reduces the nitrile derivative to the amine. The mechanism for this reaction involves the following steps: A nucleophilic attack by LAH on the nitrile derivative. This results in the formation of an imine intermediate. The imine intermediate reacts with another LAH molecule, resulting in the formation of the amine.Here's the reaction equation for this step:Mescaline structure: Mescaline is a psychoactive compound that belongs to the phenethylamine class of alkaloids. The structure of mescaline is as follows: The molecule has three methoxy groups attached to the benzene ring, and it has an amine functional group. The molecule is a white crystalline powder that is soluble in water and alcohol.

for such more questions on psychoactive

https://brainly.com/question/30551262

#SPJ8

Answer:

D

Explanation:

Grinding to a powder increases the surface area of the charcoal .

The reaction of charcoal (carbon) and oxygen is sped up by grinding the charcoal into a fine powder. This is an example of increasing surface area to increase reaction rate. Option D is the answer.

Grinding charcoal into a fine powder enhances its reactivity by increasing surface area. This finer texture promotes more frequent collisions between charcoal particles and oxygen molecules, facilitating faster chemical reactions.

The heightened contact points enable efficient utilization of reactants, optimizing resource consumption. Shorter diffusion paths within smaller particles expedite reactant diffusion, aiding quicker reaction rates.

Additionally, the augmented surface area promotes efficient heat transfer, crucial in reactions involving temperature changes.

Grinding charcoal amplifies the reaction rate by maximizing interaction opportunities, accelerating the conversion of charcoal and oxygen into products.

Learn more on charcoal here https://brainly.com/question/1683998

#SPJ2

The final pressure of the gas, when its volume is increased from 3.4 L to 4.0 L at a constant temperature, is approximately 2.55 atm.

To determine the final pressure of a gas when its volume is changed while its amount and temperature remain constant, we can use Boyle's law. Boyle's law states that the pressure of a gas is inversely proportional to its volume at constant temperature.

Mathematically, Boyle's law can be expressed as:

P1 * V1 = P2 * V2

Where:

P1 = Initial pressure

V1 = Initial volume

P2 = Final pressure

V2 = Final volume

In this case, we are given:

P1 = 3.0 atm

V1 = 3.4 L

V2 = 4.0 L

We need to find P2, the final pressure.

Rearranging the formula, we have:

P2 = (P1 * V1) / V2

Substituting the values we have:

P2 = (3.0 atm * 3.4 L) / 4.0 L

P2 = 10.2 atm / 4.0 L

Calculating P2:

P2 = 2.55 atm

Therefore, the final pressure of the gas, when its volume is increased from 3.4 L to 4.0 L at a constant temperature, is approximately 2.55 atm.

Boyle's law demonstrates the inverse relationship between pressure and volume for a gas at a constant temperature. As the volume increases, the pressure decreases, and vice versa, as long as the amount and temperature of the gas remain constant.

For more such questions on pressure visit:

https://brainly.com/question/24719118

#SPJ11

The substance begins to boil at 2750⁰C, the substance begins to melt at 1500⁰C, the temperature at which the substance is both a liquid and a gas at 2750⁰C, temperature is the substance both a solid and a liquid​ at 1500⁰C.

Heating curves are the graphical correlations between heat added to a substance. When viewed from a cooling perspective, ie. loss of heat, it is the cooling curve.

The gradient of the cooling curve is related to the heat capacity, the thermal conductivity of the substance, and the external temperature. The more heat is required to change the temperature of the substance, the slower it cools, so the smaller the gradient of the curve. The higher the thermal conductivity, the faster heat is transferred, so the faster the substance cools.

Learn more about Heating curve, here:

https://brainly.com/question/29592874

#SPJ1

The first ionization energy represents Option C.  the energy required to remove an electron from an atom.

The ionization energy is defined as the energy required to remove an electron from a gaseous atom or ion to form a cation that carries a charge of +1.Ionization energy is an essential property of an element, and it is determined by the effective nuclear charge (Zeff) and the distance between the valence electrons and the nucleus. The effective nuclear charge is the positive charge that an electron experiences from the nucleus.

The closer the valence electrons are to the nucleus, the greater the effective nuclear charge, making it more challenging to remove an electron from the atom. The ionization energy increases from left to right and from bottom to top across the periodic table. The ionization energy decreases from top to bottom and from right to left across the periodic table. The reason for this trend is the increase in atomic radius and the decrease in effective nuclear charge from top to bottom and from right to left on the periodic table.

Ionization energy plays a significant role in chemical reactions, particularly in redox reactions. The energy required to remove an electron from an atom or ion is equivalent to the energy released when the ion or atom gains an electron. A high ionization energy indicates that the atom is less reactive and more stable since it requires a lot of energy to remove an electron. Therefore the correct option is C

Know more about ionization energy  here:

https://brainly.com/question/20658080

#SPJ8

Answer:

oxygen and carbon dioxide.

hope this helps you

Answer:

Magnesium Nitrate is an ionic compound formed by cation Magnesium Mg+2, and polyatomic anion Nitrate NO−3. The charges must be equal and the opposite in order for these two ions to bind. Therefore, the one + 2 magnesium ion would require two -1 nitrate ions to balance.

Answer:

Structure of ionic crystal

Explanation:

Ionic compounds take on the form of extended three-dimensional arrays of cations and anions. The arrangement maximizes the attractive force between oppositely-charged ions.

The structural feature according to increasing energy difference between the ground state and excited state electrons is given as (i) conjugated polyene (ii) conjugated diene (iii) isolated diene.

Generally, chemical energy is defined as the energy which is stored in the bonds of chemical compounds (molecules and atoms). Chemical energy is released in the chemical reaction and mostly produces heat as a by-product which is known as an exothermic reaction.

The ground state of an electron is defined as the energy level that it usually occupies, is the state of lowest energy for that electron. There is also a maximum energy present that each electron can have and still be part of its atom.

Generally, the excited state describes an atom, ion or molecule with an electron in a higher than normal energy level than its ground state.

Learn more about energy difference from the link given below.

https://brainly.com/question/14681215

#SPJ4

Answer:

A. CODIS

Explanation:

The Combined DNA Index System (CODIS), administered by the FBI, maintains DNA profiles obtained through federal, state, and local DNA sample collection programs, and makes this information available to law enforcement agencies across the country for law enforcement identification purposes.

Answer:

0.05257 L/s

Explanation:

Step 1: Given data

The school uses 1200 gallons/day

Step 2: Convert "gal/day" to "L/day"

We will use the conversion factor 1 gal = 3.785 L.

1200 gal/day × (3.785L/gal) = 4542 L/day

Step 3: Convert "L/day" to "L/s"

We will use the following conversion factors:

4542 L/day × (1 day/24 h) × (1 h/3600 s) = 0.05257 L/s

Answer: D.

Explanation: I got it right and the dude above me is spreading fake news

The mass concentration of sand in the ethanol solution is 0.299 g/dm³.

To find the concentration in grams per cubic decimeter (g/dm³), we first need to convert the volume from liters to cubic decimeters (dm³). Since 1 liter is equal to 1 cubic decimeter, we can directly convert the volume.

Given:

Mass of sand = 0.2 g

Volume of ethanol = two-thirds liter

Converting volume to dm³:

1 liter = 1 cubic decimeter

two-thirds liter = (2/3) cubic decimeter = 0.67 dm³ (rounded to two decimal places)

Now we can calculate the concentration in g/dm³ by dividing the mass of sand by the volume in dm³:

Concentration = Mass / Volume

Concentration = 0.2 g / 0.67 dm³

Concentration ≈ 0.299 g/dm³ (rounded to three decimal places)

Learn more about mass concentration at: https://brainly.com/question/23437000

#SPJ1

Answer:

complimentary

Explanation:

Answer:

Proximal

Explanation:

Answer:The electron-domain geometry around this central atom is  linear

Explanation:

The hybridization is sp which means the number of electron pairs involved are 2. The electron domain geometry will have two sigma bonds and thus geometry will be linear.

The electron domain geometry will be Trigonal bipyramidal when hybridization is \(sp^3d\)

The electron domain geometry will be octahedral when hybridization is \(sp^3d^2\)

The electron domain geometry will be Trigonal planar when hybridization is \(sp^2\)

The electron domain geometry will be tetrahedral when hybridization is \(sp^3\)

A scientist has data for the speed of light and energy variables. E = mc²  form of the equation should the scientist use to determine the mass of an object.

Albert Einstein proposed the theory of relativity, which states that space and time are relative, and that all motion must be relative to a frame of reference.

Mathematically this equation is correct, but in terms of the meaning that people derive from it is totally wrong.

E = mc²

Some statements are mass is a condensed form of energy or energy is available in every mass.

On the original paper that Einstein published that he stated the equation as :

m = E / c²

This implies that the more energy the object has, it’s mass keeps on increasing.

So, mathematically E = mc² is correct, but not physically.

Thus, E = mc² form of the equation should the scientist use to determine the mass of an object.

To learn more about the theory of relativity, follow the link;

https://brainly.com/question/28289663

#SPJ1

The solution could be described like a saturated and concentrated solution.

Dissolution of solutions can occur in certain ways. These ways depend on the solvent dilution coefficient and the amount of solute.

If the amount of solute is less than the solvent can dissolve, the solution is unsaturated.

If the amount of solute is exactly the same, the solution is saturated.

If the amount is greater, the solution is supersaturated.

So, since the amount of solute is exactly equal to the amount that the solvent can dissolve, the solution is saturated and concentrated.

Learn more about solutions in: brainly.com/question/202460

Millikan's oil drop experiment measured the size of the electric charge on the electron.

This is referred to as a type of procedure which is carried out in other to accept or refute a hypothesis. Electron on the other hand, is the negatively charged subatomic particle which is present in an atom and are involved in the formation of new substances during a chemical reaction.

Millikan's oil drop experiment measured the size of the electric charge on the electron and used tiny drops of oil which helped in the calculation of the charge and the mass of an electron.

Read more about Experiment here https://brainly.com/question/17274244

#SPJ1

Answer: its the first answer

Explanation: