A compound is found to have an empirical formula of ch2o. What is the molecular formula when the molecular weight is 180. 0 grams?.

The final enamine structure formed between acetophenone and dimethylamine is C6H5C(=N(CH3)2)CH2.

To draw the structure of the product of the enamine formed between acetophenone and dimethylamine, follow these steps:

1. Identify the reactants: Acetophenone is an aromatic ketone with a structure of C6H5C(O)CH3, and dimethylamine is a secondary amine with a structure of (CH3)2NH.
2. Locate the reactive sites: The carbonyl carbon of acetophenone and the nitrogen of dimethylamine are the reactive sites.
3. Form an imine intermediate: The nitrogen in dimethylamine attacks the carbonyl carbon in acetophenone, leading to the formation of an imine intermediate (C6H5C(NH(CH3)2)CH3).
4. Tautomerize the imine to form the enamine: The imine intermediate tautomerizes by shifting a hydrogen from the alpha-carbon (adjacent to the nitrogen) to the nitrogen, and moving the double bond between the nitrogen and the alpha-carbon, resulting in the enamine structure (C6H5C(=N(CH3)2)CH2).

The final enamine structure formed between acetophenone and dimethylamine is C6H5C(=N(CH3)2)CH2.

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The volume of 0.175M sodium sulfate solution that is necessary to completely react with 35.0 mL of 0.112M silver nitrate is 22.4mL.

Molarity is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.

The volume of a solution can be calculated using the following expression:

CaVa = CbVb

Where;

According to this question, 0.175M sodium sulfate solution completely reacts with 35.0 mL of 0.112M silver nitrate. The volume required for this reaction to occur can be calculated as follows:

0.175 × Va = 35 × 0.112

0.175Va = 3.92

Va = 3.92/0.175

Va = 22.4mL

Therefore, 22.4mL is the volume of the sodium sulfate needed.

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The most reactive non metal is called Astantine(As)

When using the “ball and stick” drawing method of drawing a compound, the element which usually goes in the center of the model is referred to as carbon.

This is a three-dimensional models which is characterized by atoms being represented by spheres of different colors and bonds are represented by sticks between the spheres.

The black color which is present at the center of the compound , methane is referred to as carbon while the white color which is at the outer region is hydrogen.

This is therefore the reason why carbon was chosen as the most appropriate choice.

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Answer:

this would be an oxidation-reduction reaction

(D)- Sea breezes are local winds that blow from an ocean or a lake

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The 1H NMR signal for an OH or NH proton usually does not exhibit spin-spin splitting because these protons exchange rapidly with other protons in solution.

This exchange leads to broadening of the NMR signal, making it difficult to observe spin-spin splitting. However, if the exchange rate is slowed down, spin-spin splitting may be observed.

                            Additionally, if the OH or NH proton is part of a larger molecule or functional group, the surrounding atoms and chemical environment can affect the NMR signal and potentially lead to spin-spin splitting.
The statement is true. The 1H NMR signal for an OH or NH proton typically does not exhibit spin-spin splitting due to the rapid exchange of these protons with the surrounding solvent, which effectively averages out the spin-spin interactions. This results in a broad, singlet peak for these types of protons in the NMR spectrum.

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Answer:

The answer is A

Explanation:

Mass of NaCl : 5.85 g

Given

5.3 g Sodium carbonate (Na₂CO₃)

Required

Mass of NaCl

Solution

Reaction

Na₂CO₃ + 2HCl ⇒ 2NaCl + H₂O + CO₂

mol of Na₂CO₃ (MW=106 g/mol) :

= mass : MW

= 5.3 g : 106 g/mol

= 0.05

From the equation, mol ratio Na₂CO₃ : NaCl = 1 : 2, so mol NaCl :

= 2/1 x mol Na₂CO₃

= 2/1 x 0.05

= 0.1

Mass of NaCl (MW=58.5 g/mol) :

= mol x MW

= 0.1 x 58.5

= 5.85 g

Explanation:

Bottom line: Most asteroids are rocky bodies that lie within the asteroid belt while comets are dirty snowballs from the Oort Cloud, with some objects acting like a hybrid of these two types.

The kinetic molecular theory of matter explains the physical properties of matter and how they relate to their molecular structures. This theory states that matter is made up of tiny particles, called molecules, that are always in constant motion, even when in a solid state.

The kinetic molecular theory of matter helps in explaining the properties of matter and how it relates to the molecular structures of matter. According to this theory, the particles that make up matter are in constant motion regardless of their state of matter, and their motion is related to the state of matter they exist in. The theory is divided into three main postulates as follows:1. Matter is made up of tiny particles called molecules that are in constant motion, even when in a solid state.2. The movement of these particles increases with an increase in temperature, resulting in an increase in the kinetic energy of the particles.3.

The collisions between these particles and the walls of the container they are in result in the pressure exerted by the gas. The relationship between heat, energy, and temperature as part of the kinetic molecular theory is as follows:Heat is the transfer of energy between different systems, whereas temperature is the measure of the average kinetic energy of the particles in a system. This means that as heat is transferred into a system, the particles in that system will gain kinetic energy, which will lead to an increase in temperature.

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Answer:

The heart is pumping more blood throughout your body

Explanation:

the strength of the solution formed is 3.8.

The amount of solute dissolved in grammes per litre of the solution is used to determine the solution's strength. It stands for the solution's potency or concentration. It uses grammes per litre of expression.

Concentration of NaOH = 19 M

Initial volume of NaOH = 25 mL= 0.025 L

Moles of NaOH = 19*0.025

                        = 0.475 moles

Final volume of NaOH solution = 5 L

Final concentration = 0.475/5

                              = 0.095 M

so, the strength is 19/5

                            = 3.8

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In complete dominance, only one allele in the genotype is seen in the phenotype. In codominance, both alleles in the genotype are seen in the phenotype. In incomplete dominance, a mixture of the alleles in the genotype is seen in the phenotype.

There are two different types of genetic inheritance, full dominance and codominance. Codominance basically means that neither allele is able to suppress or obstruct the expression of the other allele. However, incomplete dominance occurs when a dominant allele only partially obscures the effects of a recessive gene.

Codominance occurs when the phenotype displays both alleles present in the genotype. A combination of the alleles in the genotype can be reflected in the phenotype in incomplete dominance.

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0.01 M NaCl solution will have the highest freezing point

Freezing point will be given by the formula:

ΔT(f) = iK(f).m

where, m = molality

Sucrose is non-electrolyte and so i = 1

NaCl → Na+ + Cl−

Thus i = 2

Na2SO4 → 2Na+ + SO4^2−

Thus i = 3

The highest freezing point will be of the solution having the lowest ΔT(f) value.

As option B has least value of both i and m, 0.01M NaCl has lowest

ΔT(f) = K(f) × (0.02)

Therefore, 0.01 M NaCl solution will have the highest freezing point.

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Answer:

0.01 M NaCl is the answer

Answer:

1.1 M

Explanation:

The formula mass of sodium hydrogen carbonate is about 23+1+12+3(16)=84 g/mol, so 96 g is about 1.142 mol.

molarity = (moles of solute)/(liters of solution) = 1.1 M

They give us the mass of H2O, to determine the moles we will use the molar mass of H2O equal to 18g/mol

a. The number of moles of H2O is 2.78

Now, the number of molecules is found using Avogadro's relation, which tells us that in one mole of any substance, there will be 6.022x10^23 molecules. So the molecules of H2O will be:

b. There are 1.67x10^24 molecules in 50 grams of H2O

Answer:

✔

Explanation:

\(4.05 * 10 ^{4}\)

To find the pressure in kPa we use the conversion

1 atm = 101.3 kPa

If 1 atm = 101.3 kPa

400 atm = 400 × 101.3 = 40520 kPa

Expressing it in standard form we have the final answer as

4.05 × 10⁴ kPa

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Pressure may also be expressed in terms of standard atmospheric pressure; the atmosphere (atm) is equal to this pressure, and the torr is defined as 1⁄760 of this. Manometric units such as the centimeter of water, millimetre of mercury, and inch of mercury are used to express pressures in terms of the height of column of a particular fluid in a manometer.

P = F / A

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We first verify that the equation is balanced. We have 5 carbons (C), 2 sulfurs (S), and 4 oxygens (O) on each side of the reaction. So the reaction is balanced.

a) Now if we look at the reaction we can see that when 2 moles of SO2 react, 1 mole of CS2 is produced. That is, the ratio is 2 to 1. For each mole of SO2 half as many moles of CS2 will be produced.

So if we have 9.5 moles of SO2 we will have 9.5/2 moles, that is 4.75 moles of CS2.

Answer a) By reacting 9.50 moles of SO2 with an excess of it would be produced 4.75 moles of CS2.

Now, for the following parts of the question, we can apply the ideal gas law. This is because the reaction is in the gas phase and the law applies only to gases.

Where,

P= Pressure at STP = 1 atm

T= Temperature at STP = 273.15K

R= Ideal law constant = 0.08206 (atm L)/(mol K)

V= Volume of the gas

n= Numer of moles

b)We clear n and we replace the known values of SO2 to find the number of moles of SO2 that react.

Now, for each mole of SO2 that reacts we need 5/2 moles of C, that is 0.24x5/2=0.61 moles of C.

We use mass molar of C to calculate the grams.

Mass molar of C=12.01g/mol

Mass of C= Moles of C x Mass Molar

Mass of C= 0.61 mol x 12.01 g/mol = 7.37 g

So, To fully react 5.5 L of SO2 at STP we will need 7.37 g of C.

c)We apply the gas law again but this time we clear the volume.

We also take into account that for each mole of C, 4 moles of CO are produced, so if we have 20 moles of C we will produce 20x4=80 moles of CO.

So, from 20.0 moles of C at STP can be produced 1793.18 liters of CO

in dehydration synthesis the water molecules formed from oxygen and hydrogen are removed.

A water molecule is released during the process of making larger molecules out of smaller monomers, which is known as dehydration synthesis. This can be used to make big biological compounds like carbohydrate polymers and triglycerides as well as synthetic polymers like polyethylene terephthalate (PET).The dehydration synthesis reaction is used in a wide range of biological or chemical activities. Examples include the conversion of monosaccharides like glucose into disaccharides like sucrose and the condensation of alcohol to produce ether

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Answer:

speed inscreases mass decrreases, but when no friciton mass dont matter

Explanation:

Mass does not affect speed directly, but it does affect how fast an object can change its speed by accelerating or decelerating. Objects with larger masses require more time for acceleration or deceleration compared to lighter objects. The law of inertia states that objects that are still remain still and that objects in motion remain in motion regardless of the object's mass.

862.4 grams of carbon dioxide will be produced when 6.2 moles of propane, C₃H₈ is burned in oxygen

First, we will write a balanced equation

⇒ C₃H₈ + 5O₂ = 3CO₂ + 4H₂O

From the equation, we can see that 1 mole of propane takes 3 moles of Carbon dioxide in a ratio of 1:3

It's given that 6.2 moles of propane are burned, so using the ratio 1:3, we get 6.2 × 3 = 19.6 moles of Carbon dioxide

Now to get the mass of Carbon dioxide, we have to multiply 19.6 moles of carbon dioxide by its molar mass

Molar mass of Carbon dioxide = 1 × 12 + 2 × 16 = 44 grams/mole

So, the mass of carbon dioxide = 19.6 × 44 = 862.4 grams

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The concentration of the final solution, rounded to one significant figure, is 0.5 M.

To find the concentration of the final solution, we need to use the formula:

C1V1 = C2V2

where;

In this problem, we can plug in the given values and solve for C2:

C1 = 12 M

V1 = 20 mL = 0.02 L

V2 = 500 mL = 0.5 L

C1V1 = C2V2

(12 M)(0.02 L) = C2(0.5 L)

0.24 = 0.5C2

C2 = 0.48 M

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In the absence of a parallel collimator during SPECT imaging, the gamma rays emitted from the source would travel in multiple directions and result in blurred and scattered images.

A parallel collimator is used in order to localize the source of gamma emission during SPECT imaging. This is necessary because, in the absence of the collimator, the gamma photons emitted from different points in the source would reach the detector without any directionality, leading to blurred and indistinguishable images. The parallel collimator ensures that only gamma photons traveling parallel to the collimator's axis reach the detector, creating a clearer and more accurate representation of the gamma emission source.

The collimator is designed to only allow gamma rays that are traveling parallel to the collimator's axis to pass through, thus creating a focused beam and allowing for accurate localization of the source of gamma emission.

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Information about how a chemical reacts under high pressure can be found in the "reactivity" section of a MSDS: True.

MSDS is an abbreviation for Material Safety Data Sheet and it can be defined as a text-based document which is designed and developed to provide more information with respect to the chemical and physical properties of an equipment, chemical compound, or substance, based on the following:

In this context, we can infer and logically deduce that it is true that the information about how a chemical react would under high pressure can be found in the "reactivity" section of a Material Safety Data Sheet (MSDS).

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The precipitate may appear as a solid reddish-brown substance suspended in the solution. It's important to note that these observations are based on the assumption that the reactions occur under standard conditions.

When aqueous NaOH (sodium hydroxide) reacts with ZnSO4 (zinc sulfate), the following chemical equation represents the reaction:

2NaOH + ZnSO4 -> Zn(OH)2 + Na2SO4

In this reaction, sodium hydroxide (NaOH) reacts with zinc sulfate (ZnSO4) to form zinc hydroxide (Zn(OH)2) and sodium sulfate (Na2SO4).

When Fe2(SO)3 (iron(III) sulfate) reacts with aqueous NaOH, the following chemical equation represents the reaction:

2NaOH + Fe2(SO)3 -> Fe(OH)3 + Na2SO4

In this reaction, sodium hydroxide (NaOH) reacts with iron(III) sulfate (Fe2(SO)3) to form iron(III) hydroxide (Fe(OH)3) and sodium sulfate (Na2SO4).

Observations:

When NaOH reacts with ZnSO4, a white precipitate of zinc hydroxide (Zn(OH)2) is formed, which is insoluble in water. The precipitate may appear as a solid white substance suspended in the solution.

When NaOH reacts with Fe2(SO)3, a reddish-brown precipitate of iron(III) hydroxide (Fe(OH)3) is formed, which is also insoluble in water. The precipitate may appear as a solid reddish-brown substance suspended in the solution.

It's important to note that these observations are based on the assumption that the reactions occur under standard conditions.

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