consider the methane molecule. what is the central atom? enter its chemical symbol. how many lone pairs are around the central atom? what is the ideal angle between the carbon-hydrogen bonds? compared to the ideal angle, you would expect the actual angle between the carbon-hydrogen bonds to be ... (choose one)

Answer:

it sucks up stuff,cleans around the house,and can be emptied

Explanation:

because its what it is spose to do

Answer:

a space entirely devoid of matter.

Explanation:

To determine the number of moles of the gaseous organic compound, we can use the ideal gas law equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

First, we need to convert the density to mass per volume. The density of the gas is given as 340g/L. Therefore, the mass of 1 L of the gas is 340 g.

Next, we need to use the ideal gas law to calculate the number of moles. We know that the pressure is 1.7 atm, the temperature is 45°C (which is 318 K), and the volume can be calculated using the density and the molar mass of the compound. The molar mass can be determined from the molecular formula of the compound.

Assuming the compound is a hydrocarbon, we can use an average molar mass of 28. Thus, the volume of 1 mole of the gas can be calculated as follows:

V = (molar mass/density) × 1000 ml/L = (28/340) × 1000 = 82.35 ml/mol

Using the ideal gas law equation and plugging in the given values, we get:

n = (PV) / (RT) = (1.7 atm × 82.35 ml) / (0.0821 L atm/mol K ×318 K) = 0.839 mol

Therefore, the number of moles of the gaseous organic compound is 0.839 mol

To know more about Moles and Molar mass ,visit :

https://brainly.com/question/12007096

#SPJ9

Answer: During succession, new species move into an area and colonize it.

Explanation: Ecological succession refers to the process of change in the composition and structure of an ecosystem over time. It occurs due to the interactions between the biotic (living) and abiotic (non-living) components of an environment. As succession progresses, new species gradually establish and thrive in the area, leading to a change in the species composition. This process can occur over a long period of time, ranging from decades to centuries, depending on various factors such as environmental conditions and the specific type of succession.

Thus, the consumption of 3 L of O₂ will produce 1.5 L of CO₂.

Methane is non-toxic and poses no danger when inhaled in small amounts, but if significant amounts of the gas are allowed to replace air, the lack of oxygen could cause suffocating.

In the reaction, CH₄+2O₂⇒CO₂+2H₂O

2 moles of O₂ consumption will produce 1 mole of CO₂.

In the gaseous phase, the relationship between the amount of compound and the volume is:  PV=nRT

The volume and the amount of the gaseous compound are proportionate at the same temperature and pressure.

Thus, the consumption of 3 L of O₂ will produce 1.5 L of CO₂.

To know more about Methane gas visit:

https://brainly.com/question/28003664

#SPJ4

Answer:

The nonpolar covalent compounds are:

H2O (polar covalent)

NCl3 (polar covalent)

AuCl3 (ionic)

ClO2 (polar covalent)

SF4 (polar covalent)

SO3 (nonpolar covalent)

Answer:

68.46 gms

Explanation:

2 molal solution means there is 2 moles of sucrose per kg of solvent (generally 1000 cc)

2 moles / 1000 ml * 100 ml = .2 moles

mole weight of sucrose = 342.3 gm/mole

342.3 gm/mole * .2 mole = 68.46 gms

Answer:

Brass and bronze are both metal alloys, which means they are a combination of two or more different metals. Brass is composed of copper and zinc, whereas bronze is made up of copper and tin, sometimes with other elements such as phosphorus or aluminium added in.

Answer:

Both brass and bronze are metal alloys, which are made up of two or more distinct metals. Brass is comprised of copper and zinc, while bronze is formed of copper and tin, with the addition of phosphorous or aluminum.

Explanation:

Hope it helps;)

Alkanes are organic molecules that contain only elements such as hydrogen and carbon that are bonded together by single covalent bonds.

The characteristics that identify a molecule as an alkane and the elements present are as follows:

1. Alkanes contain only hydrogen and carbon atoms.

2. They are saturated hydrocarbons because they only have single covalent bonds between carbon atoms.

3. Alkanes are also nonpolar because of the carbon and hydrogen bonds that have similar electronegativities.

4. Alkanes tend to be unreactive because of their stable C-C and C-H bonds.

5. These molecules do not have polar functional groups that can be attacked by other reactive molecules.

6. Since they have only single bonds, alkanes have a higher boiling and melting point compared to other unsaturated hydrocarbons.

Learn more about alkanes: https://brainly.com/question/24270289

#SPJ11

A sample of pure water at 25°C has a pH of 7.00.

we can use the Kw expression to calculate the concentration of either ion:

Kw = [H3O+][OH-]

Since pure water is neutral, [H3O+] = [OH-]. Therefore:

[H3O+] = [OH-] = sqrt(Kw) = sqrt(1.0 x 10^-14) = 1.0 x 10^-7 M

So, the correct answer is C: pH = 7.00.

The pH of a solution is defined as the negative logarithm of the H3O+ concentration:

pH = -log[H3O+]

Substituting the value we found for [H3O+], we get:

pH = -log(1.0 x 10^-7) = 7.00

Therefore, a sample of pure water at 25°C has a pH of 7.00.

learn more about Kw here

https://brainly.com/question/30901531

#SPJ9

Answer:

s= 0.5 at^2

0.5 x 9.81 x 3^2 = 44m

Explanation:

OB.

44 meters

Answer:

∆H for the reaction is -108.7 KJ

Explanation:

To calculate ∆H of a reaction using Hess’ law , we subtract the ∆H of reactants from that of the products

What we should however understand is that the ∆H of elements standing alone and the ∆H of molecules of gaseous elements equals zero.

So let’s proceed

For the question, what we want to calculate is

∆H = ∆H(ClF3) - ∆H(ClF)

Kindly note that ∆H(F2) = 0, that’s why I am not including it in the calculation

We can shop for the ∆H of both the reactants and the products from the reactions below;

For the first one, the expression is

∆H = ∆H(F20) + ∆H(Cl20) - 2∆H(ClF) = 167.4

For the second, we have

∆H = 3∆H(F20) + ∆H(Cl2O) - 2∆H(ClF3) = 341.4

and lastly, we have;

∆H = 2∆H(F2O) = -43.4

So how do we proceed from here? To cancel out the ∆H(Cl20) and ∆H(F20), we add the 1st and last while we subtract the second.

So we have ;

∆H(F20) + ∆H(Cl20) - 2∆H(ClF) + 2∆H(F2O) - {3∆H(F20) + ∆H(Cl2O) - 2∆H(ClF3)} = (167.4 -43.4)-341.4

So we have ∆H(Cl20) and ∆H(F20) canceled out. we are left with;

-2∆H(ClF) + 2∆H(ClF3) = -217.4

Divide through by 2, we have;

∆H(ClF3) - ∆H(ClF) = -108.7 KJ

Now compare this with the initial equation we first wrote and you can see that they are equal

The seeds from the cross of purebred plants grow into adult plants then the color of the flower they will make will be the same as the parents plant's flowers color.

When self-fertilization for several generations occurs in plants such that their specific traits under consideration remain unchanged are called true-breeding or pure-breeding plants. These are the ones that when undergoing self-pollination produces offspring with the exact traits.

Purebred is also known as homozygous and consists of gene pairs with genes that have the same traits. Hybrid is also known as heterozygous and has not the same gene pairs. Genotype is the actual gene makeup represented by letters. Phenotype is the physical appearance of a trait, such as a red or orange body color.

so we can conclude that the color of the flower seeds from the cross of purebred plants growing into adult plants will make will be the same as the parent parent plant's flower's color.

Learn more about purebred here:https://brainly.com/question/13994680

#SPJ1

The balanced equation for the given mixture is the following.

BaCl2 + Na2CO3 → BaCO3(s) + 2 NaCl

now, calculate the no of moles of each BaCl2 and Na2CO3

(65 mL) x (0.3 M BaCl2) = 0.0195 mol BaCl2

(60 mL) x (0.35 M Na2CO3) = 0.021 mol Na2CO3

0.0195moles of BaCl2 is reactin completely with 0.021moles of Na2CO3, but we have more Na2CO3 present than BaCl2, so Na2CO3 is in excess and BaCl2 is the limiting reactant.

Therefore,

(0.0195 mol BaCl2) x (1 mol BaCO3 / 1 mol BaCl2) x (197.3359 g/mol) = 3.85 g BaCO3.

197.3359 g/mol is the molar mass of the BaCO3.

A precipitate is a solid formed in a chemical reaction other than one of the reactants. This can occur when solutions containing ionic compounds are mixed to form an insoluble product. The identity of precipitates can often be determined by examining solubility rules. Mass is preserved during the precipitation reaction. No matter what changes occur, the total mass of matter contained remains the same. The mass of the product is the same as the mass of the reactants in a chemical reaction.

Learn more about The mass here:-https://brainly.com/question/19385703

#SPJ4

Answer:

Milk is naturally a white substance due to the make-up of water and other components including fat and protein that mix together to form tiny particles which reflect light. There is a difference in mammals milk; for example, hippos milk is pink.

Explanation:

Explanation:

hope the picture above help u understand I did it in step so it would be easier to understand:)

Answer:

gnzl8303

gnzl8303vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv

Explanation:

Answer:

how they are alike: Both compound and mixture are combined in a definite ratio or in any proportion. Both compound and mixture consist of two or more substances/elements. Both compounds and mixtures have physical and chemical properties.

how they are different: The chemical composition of compounds is always fixed. A mixture can have a variable composition of the substances forming it. Mixtures can either be homogeneous or heterogeneous in nature. The constituents of a compound can only be separated by either chemical or electrochemical methods (like extraction).

Explanation:

Thin layer chromatography (TLC) is a technique used to separate and analyze mixtures of compounds. A small amount of the mixture is spotted on a TLC plate, which is coated with a thin layer of an adsorbent material, such as silica gel or alumina.

The plate is then placed in a developing chamber containing a solvent system, which travels up the plate by capillary action, carrying the mixture with it.

Different compounds in the mixture will travel at different rates on the plate, depending on their chemical properties and how strongly they interact with the adsorbent material.

Once the solvent system has traveled a sufficient distance up the plate, it is removed from the developing chamber and the plate is allowed to dry. The resulting spots on the plate can be visualized under ultraviolet light or by using a developing reagent.

The Rf value, which is the distance traveled by a compound divided by the distance traveled by the solvent, can be used to identify and compare compounds on the plate.

Based on this information, I can explain how the TLC plate might be used to answer the questions posed in the prompt:

(a) To determine if the reaction went to completion, one could compare the spot for the starting material (acetanilide) with the spots for the unrecrystallized and recrystallized products.

If the spot for the starting material is still visible in one or both of the product lanes, it suggests that the reaction did not go to completion and some starting material remains.

(b) To determine if the desired product was obtained, one could compare the spots for the unrecrystallized and recrystallized products with the spots for pure para-nitroaniline and pure ortho-nitroaniline.

If the spots for the products match the spot for pure para-nitroaniline, it suggests that the desired product was obtained.

(c) To determine if the product was a mixture, one could compare the spots for the unrecrystallized and recrystallized products. If there are multiple spots in one or both lanes, it suggests that the product is a mixture.

(d) To determine if the final product was pure, one would need to compare the spot for the recrystallized product with the spots for the starting material and the impure product.

If the spot for the recrystallized product is a single, sharp spot with an Rf value that matches the Rf value for pure para-nitroaniline, it suggests that the final product is a pure compound.

To know more about  chromatography refer home

https://brainly.com/question/31857177#

#SPJ11

I think it's c I'm not sure

Answer:

1.89

Explanation:

238cal = J joules

450cal = xJ joules

\( \frac{450}{238} = \frac{xj}{j} \)

1.89 = x

450cal = 1.89J joules

Answer:

Dark matter was first suspected in clusters of galaxies when the galaxies were found to move with too high a speed to be retained in the cluster by their gravitational influence on each other

Answer:

Dark matter is a hypothetical form of matter thought to account for approximately 85% of the matter in the universe. Dark matter is called "dark" because it does not appear to interact with the electromagnetic field, which means it does not absorb, reflect, or emit electromagnetic radiation and is, therefore, difficult to detect.

The noble gases have a full outer shell of valence electrons, making them stable and unreactive. They are colorless, odorless gases at room temperature and have very low boiling points. Their lack of reactivity makes them useful in a variety of applications, including lighting and welding.

The properties that are common to each of the following chemical families include:

(a) Alkali metals The alkali metals have a single valence electron in their outermost shell, which is easily lost to form an ion with a charge of +1. They are the most reactive metals, reacting with water and air to produce hydrogen gas and an oxide layer, respectively. They are silvery-white and have a soft texture.

(b) Alkaline earth metals The alkaline earth metals have two valence electrons in their outermost shell, which they readily lose to form ions with a charge of +2. They are less reactive than the alkali metals, but they still react with oxygen to form an oxide layer on their surface. They are also silvery-white in color and have a harder texture than the alkali metals.

(c) Halogens The halogens have seven valence electrons in their outermost shell, making them highly reactive nonmetals. They readily form ions with a charge of -1 by gaining an electron. They are diatomic molecules at room temperature and can be found in a variety of colors and states of matter.

(d) Noble gases The noble gases have a full outer shell of valence electrons, making them stable and unreactive. They are colorless, odorless gases at room temperature and have very low boiling points. Their lack of reactivity makes them useful in a variety of applications, including lighting and welding. These properties are common to each of the following chemical families.

To know more about noble gases visit:-

https://brainly.com/question/19024000

#SPJ11

wht reaction nnnnnnnnñnn

Atoms bond together to form compounds because in doing so they attain lower energies than they possess as individual atoms. A quantity of energy, equal to the difference between the energies of the bonded atoms and the energies of the separated atoms, is released, usually as heat. That is, the bonded atoms have a lower energy than the individual atoms do. When atoms combine to make a compound, energy is always given off, and the compound has a lower overall energy.

When a chemical reaction occurs, molecular bonds are broken and other bonds are formed to make different molecules. For example, the bonds of two water molecules are broken to form hydrogen and oxygen.

\(2_{H2O}\) ⇒ \(2H_{2} +O_{2}\)

Energy is always required to break a bond, which is known as bond energy. While the concept may seem simple, bond energy serves a very important purpose in describing the structure and characteristics of a molecule. It can be used to determine which Lewis Dot Structure is most suitable when there are multiple Lewis Dot Structures.

Energy is always required to break a bond. Energy is released when a bond is made.

Although each molecule has its own characteristic bond energy, some generalizations are possible. For example, although the exact value of a C–H bond energy depends on the particular molecule, all C–H bonds have a bond energy of roughly the same value because they are all C–H bonds. It takes roughly 100 kcal of energy to break 1 mol of C–H bonds, so we speak of the bond energy of a C–H bond as being about 100 kcal/mol. A C–C bond has an approximate bond energy of 80 kcal/mol, while a C=C has a bond energy of about 145 kcal/mol. We can calculate a more general bond energy by finding the average of the bond energies of a specific bond in different molecules to get the average bond energy.

Table 1: Average Bond Energies (kJ/mol)

Single Bonds Multiple Bonds

H—H  

432

N—H  

391

I—I  

149

C = C  

614

H—F  

565

N—N  

160

I—Cl  

208

C ≡ C  

839

H—Cl  

427

N—F  

272

I—Br  

175

O = O  

495

H—Br  

363

N—Cl  

200

C = O*  

745

H—I  

295

N—Br  

243

S—H  

347

C ≡ O  

1072

N—O  

201

S—F  

327

N = O  

607

C—H  

413

O—H  

467

S—Cl  

253

N = N  

418

C—C  

347

O—O  

146

S—Br  

218

N ≡ N  

941

C—N  

305

O—F  

190

S—S  

266

C ≡ N  

891

C—O  

358

O—Cl  

203

C = N  

615

C—F  

485

O—I  

234

Si—Si  

340

C—Cl  

339

Si—H  

393

C—Br  

276

F—F  

154

Si—C  

360

C—I  

240

F—Cl  

253

Si—O  

452

C—S  

259

F—Br  

237

Cl—Cl  

239

Cl—Br  

218

Br—Br  

193

*C == O(CO2) = 799

When a bond is strong, there is a higher bond energy because it takes more energy to break a strong bond. This correlates with bond order and bond length. When the Bond order is higher, bond length is shorter, and the shorter the bond length means a greater the Bond Energy because of increased electric attraction. In general, the shorter the bond length, the greater the bond energy.

The average bond energies in Table T3 are the averages of bond dissociation energies. For example the average bond energy of O-H in H2O is 464 kJ/mol. This is due to the fact that the H-OH bond requires 498.7 kJ/mol to dissociate, while the O-H bond needs 428 kJ/mol.

Explanation:

\(v = vdm \times n\)

Vdm=22.4dm.

mole(n)=4 mol

therefore the total volume

\(v = 22.4 \times 4 \\ v = 89.6dm\)

The order of the substituents according to CIP sequence rules is as follows: 1. -Br 2. -CH2CH2Br 3. -C equivalence N 4. -CH2Br

The Cahn-Ingold-Prelog (CIP) sequence rules describe how to assign the absolute configuration of a chiral center to an enantiomer. The ranking of substituents can be done with the help of CIP sequence rules. The sequence rules are as follows:At first, the priority of substituents is determined by atomic number. The higher the atomic number, the higher the priority. If a molecule has isotopes, the one with a higher atomic mass takes priority.Next, if the atoms in two substituents have the same atomic number, the atoms in each substituent are compared, going atom by atom down the chains of atoms until a difference is found. When a difference is found, the substituent with the atom of higher atomic number is given the higher priority.The steps for ranking the given set of substituents are as follows:As we can see in the given set of substituents, the most common atoms are carbon and bromine. The carbon has an atomic number of 6, and bromine has an atomic number of 35.5. Hence, Bromine has a higher atomic number than Carbon. Therefore, bromine gets the highest priority among the given substituents.Now, we have to compare the other substituents to the highest priority substituent (Bromine).If we compare -CH2Br with -CH2CH2Br, both substituents have the same atoms up to the second carbon. After that, -CH2Br has a single carbon atom, whereas -CH2CH2Br has two carbon atoms. The substituent with more carbon atoms is given higher priority. Therefore, -CH2CH2Br is ranked higher than -CH2Br.In -C equivalence N, nitrogen has an atomic number of 7, which is higher than the atomic number of carbon in -CH2Br and -CH2CH2Br. Therefore, -C equivalence N is ranked third.Lastly, -Br is ranked the lowest among the substituents.The order of the substituents according to CIP sequence rules is as follows: 1. -Br 2. -CH2CH2Br 3. -C equivalence N 4. -CH2Br.

Learn more about  CIP sequence here:

https://brainly.com/question/31976935

#SPJ11

Answer:

0

Explanation:

Answer:

(1) atomic numbers

Explanation:

The observed regularities in the properties of the elements on the periodic table are periodic functions of their atomic numbers.

The observed regularities in the properties of  the elements are periodic functions of their atomic numbers.

Modern periodic law states that "Properties of elements are a periodic function of their atomic number not by their atomic mass". Modern periodic law was proposed by Henry Moseley in 1913. Physical and chemical properties of elements depend on the number of electrons and their arrangement.

Thus properties of elements are periodic function of their atomic numbers and not atomic masses. If the properties of an element depend on number of proton and neutron then the properties are periodic function of their atomic mass so we can conclude that the observed regularities in the properties of  the elements are periodic functions of their  atomic numbers.

Learn more: https://brainly.com/question/19534915

Answer:

Germanium or Ge

Explanation:

It is on the perioidic table. Gallium has an atomic number of 31 and Germanium has an atomic number of 32.

Based on the table of information, electromagnet Y will produce the strongest magnetic force.

What is Magnetic Force?

Magnetic force is produced by magnetic fields, which are created by the motion of electric charges. When two magnets are brought close together, their magnetic fields interact with each other, and they can either attract or repel each other, depending on the orientation of their poles. Objects that are not magnets themselves can also be affected by magnetic fields, as long as they contain charged particles that are in motion.

It has the highest number of turns, the largest current, and the longest coil length among the four electromagnets, which are factors that contribute to a stronger magnetic field.

Learn more about Magnetic Force from the given link

https://brainly.com/question/2279150

#SPJ1

Answer:

1. B

2. C

3. C

4. D

5. D

Explanation:

trust me