What is the concentration in molarity of an aqueous solution which contains 1.41% by mass acetone (MM = 58.08 g/mol)? The density of the solution is 0.971 g/mL.

answer and explanation

it is the conjugate of Br-

Ionization energy is the minimum energy required to remove an electron from an isolated atom in the gaseous state.

The ionization energy of each one:

C - 1086

H - 1312

N - 1402

O - 1314

Answer: N has the greatest ionization energy.

Complete of row:

A mole is a unit of account for chemistry. The unit of account is used to facilitate the calculation of an object.

One mole of any substance will have the same number of particles, which is equal to 6.02 × 10²³ particles." For example, 1 mole of air contains 6.02 × 10²³ molecules of H₂O. 1 mole of oxygen gas contains 6.02 × 10²³ molecules of O.

The mole scale is needed as an indication of the amount of substance or compound, mole is the gram of substance divided by the relative molecular mass (Mr). The formula for calculating the moles of a compound is n = gram/Mr, in this case, n is the moles of the substance and gr is the mass of the substance.

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The atomic number of calcium i.e. Z value is 20 with 35 neutrons and 20 electrons.

Atomic number is defined as a chemical element's nuclear charge number (symbol Z) is the charge number of an atomic nucleus.
It can also be defined as  the number of protons or positive charges in the nucleus of an atom of a specific element, and thus the number of electrons generally surrounding the nucleus.

The number of protons is equal to number of number of electrons.

Thus. the atomic number of calcium i.e. Z value is 20 with 35 neutrons and 20 electrons.

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Answer: grey clouds

Explanation:

Answer:

Nimbostratus clouds if you want to be scientific but grey clouds ae also an answer.

Explanation:

Sorry if this late.

Answer:

Voltage is the measure of electric potential energy per unit charge, current is the flow of electric charge through a circuit, and resistance is the property of a material that opposes the flow of electric current.

Ohm's Law relates these three concepts by stating that current is directly proportional to voltage and inversely proportional to resistance.

Hope this helps!

Answer:

A molecule made of two or more elements chemically combined is a compound.

A molecule made of two atoms of the same element is just that an element.

A molecule made of two ( or more) elements is a compound.

Explanation:

Answer:

hi

Explanation:

than you for points and thank me if you like

Okay, let's break this down step-by-step:

1) The molecular formula for sucrose is C12H22011. This means each mole of sucrose contains 12 moles of carbon and 22 moles of hydrogen.

2) You are combusting 38.5 grams of sucrose. To convert grams to moles, we divide by the molar mass:

Molar mass of C12H22011 = 342.3 g/mol

So 38.5 g / 342.3 g/mol = 0.113 moles of sucrose

3) According to the combustion reaction, each mole of sucrose produces 12 moles of CO2.

So 0.113 moles of sucrose will produce 0.113 * 12 = 1.356 moles of CO2.

4) Round to the nearest whole number:

1 mole of CO2

Therefore, the complete combustion of 38.5 grams of sucrose in excess oxygen would produce 1 mole of carbon dioxide.

Let me know if you have any other questions!

Answer:

The answer is

Plant also use cellular respiration

Answer:

B - Plants also use cellular respiration.

Explanation:

Did the test.

Answer: tsunami no cap

Explanation:

Answer:

Abrasion is the answer.

Answer:

+3

Explanation:

u see sum of oxidation number in all situations have to be 0

ClO2 =-1

so Fe is +3

Work is said to be done if the force applied to a body causes the body to move through a distance.

Student B used more work and power

Workdone = Force * Distance

For student A:

Force = 3N

distance = 5meters

Time taken = 10 secs

Workdone by Student A = 3 * 5

Workdone by student A = 15Nm

Power used up = workdone/time

Power used up = 15/10

Power used up = 1.5 Watts

For student B:

Force = 6N

distance = 5meters

Time taken = 5 secs

Workdone by Student A = 6 * 5

Workdone by student A = 30Nm

Power used up = workdone/time

Power used up = 30/5

Power used up = 6 Watts

This shows that student B used more work and power

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Approximately 0.157 liters or 157 milliliters of the 4.50 M HCl solution can be made by mixing the given solutions.

To determine the volume of 4.50 M HCl that can be made by mixing the given solutions, we can use the concept of the concentration-volume relationship:

C1V1 = C2V2

Where:

C1 = concentration of the first solution

V1 = volume of the first solution

C2 = concentration of the second solution

V2 = volume of the second solution

Let's assign the variables as follows:

C1 = 5.65 M

V1 = unknown volume (we'll solve for this)

C2 = 3.55 M

V2 = 250.0 mL = 0.250 L (since the volume is given in milliliters)

Now we can plug in the values into the equation and solve for V1:

(5.65 M)(V1) = (3.55 M)(0.250 L)

Dividing both sides of the equation by 5.65 M:

V1 = (3.55 M)(0.250 L) / 5.65 M

V1 ≈ 0.157 L

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In the first dissociation of H2A:

molarity    H2A(aq)↔ (HA)^-(aq) + H^+(aq)

initial                0.05 m          0 m           0 m

change               -x                 +x               +x

equilibrium    0.05-x               x                 x

we can neglect X in [H2A] as it so small compared to the 0.05

so by substitution in Ka equation:

Ka1 = [HA][H] / [H2A]

2.2x10^-6 = X^2/0.05

X = √(2.2x10^-6)*(0.05)= 1.1x10^-7

X=   3.32x10^-4 m

∴ [H2A] = 0.05 - 3.32x10^-4 = 0.0497 m

[HA] = 3.32x10^-4 m

[H] = 3.32x10^-4 m

the second dissociation of H2A: when ka2 = 8.2x10^-9

                          HA-(aq)     ↔ A^2- (aq) + H+(aq)

at equilibrium   3.32x10^-4        y              3.32x10^-4

Ka2           = [H+][A^2-] / [HA]

8.2x10^-9 = Y(3.32x10^-4)/(3.32x10^-4)

∴y = 8.2x10^-9 m

∴[A] = 8.2x10^-9 m

PH= -㏒[H+]

   = -㏒(3.32x10^-4)= 3.479  

[A]=8.2x10^-9 m

[H2A] = 0.0497 ≈ 0.05 m

C. Double replacement

cations and anions switch places

Answer:

Breaking bonds in LION and HF

Explanation:

Breaking bonds in LiOH and HF requires energy in the given chemical process. Therefore, the correct option is option B.

One indicator of a chemical bond A–B's strength is the bond-dissociation energy. It can be described as the typical enthalpy change that occurs when A and B, whose are typically radical species, are split apart by homolysis. The bond-dissociation energy is commonly described as the enthalpy change that occurs during homolysis at 0 K, while the enthalpy change at 298 K is additionally a frequently seen parameter.

The terms "bond-dissociation energy" and "bond-dissociation enthalpy," which are often used interchangeably, are comparable. The bond-dissociation energy (D0), according to some authors, actually refers to the shift in enthalpy at 0 K. Breaking bonds in LiOH and HF requires energy in the given chemical process.

Therefore, the correct option is option B.

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Answer:

False

Explanation:

The given statement stating that resistance  is the slowing of the flow of electrons and where some of the electrical energy is converted into heat is true and it is a opposite of conduction.

Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.

In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .

When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:

1) heat conduction

2) electrical conduction

3)sound conduction

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Vomiting, headaches, wooziness, blurred vision, and even liver injury are side effects of vitamin A. Vitamin D - Tiredness, headache, sickness, and vomiting. Vitamin C: Heartburn, diarrhea, vomiting, and nausea.

Yes, excessive amounts of some types of vitamin A can be dangerous. A strong headache, blurred vision, nausea, dizziness, muscular aches, and issues with coordination can result from taking too much preformed vitamin A, which is typically found in supplements or some medications.

Poisonous Substance. Any component in a multivitamin supplement can be toxic in large doses, but iron or calcium pose the biggest threat. Large or toxic doses of calcium, vitamin D, and vitamin A carry additional dangers.

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The molecular formula for a molecular compound's molecular formula lists the variety of atoms that make up the molecule. The name of the compound (Co(ClO₃)₄(NO₂))Cl is tetrachloridobis(nitrito-O)cobalt(III) chloride.

The name or the formula of the following compounds are:

The name of the compound (Co(ClO₃)₄(NO₂))Cl is tetrachloridobis(nitrito-O)cobalt(III) chloride.

The name of the compound K(Co(SO₄)(NH₂CH₂CH₂NH₂)₂(CN)) is potassium bis(ethylenediamine)dihydroxidocyanidocobaltate(III) sulfate.

The formula of the compound sodium carbonyldiisothriocyanatotrinitritochromate(III) is Na[Cr(NCS)₂(NO₂)₃(CO)].

The formula of the compound amminediaquatrihydroxidochromium(VI) nitrate is [Cr(OH)₄(NH₃)₂(H₂O)₂]NO₃.

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The volume of the weather balloon at 75 cmHg is  (n₁ * R * T₂) / P₂ = (n₁ * 0.0821 L·atm/(mol·K) * 308.15 K) / 0.9868 atm.

The volume of the weather balloon at 75 cmHg when it is heated to 35 degrees Celsius, we can use the ideal gas law, which states that the product of pressure (P) and volume (V) of a gas is proportional to the product of the number of moles (n) and the temperature (T) in Kelvin.

PV = nRT

Where R is the ideal gas constant.

First, let's convert the initial volume from dm³ to liters:

Initial volume = 605 dm³ = 605 L

At STP (Standard Temperature and Pressure), the temperature is 273.15 K and the pressure is 1 atmosphere (atm).

Using the initial conditions:

P₁ = 1 atm

V₁ = 605 L

T₁ = 273.15 K

We can calculate the number of moles (n₁) of gas using the ideal gas law:

n₁ = (P₁ * V₁) / (R * T₁)

Now, we need to find the final volume (V₂) at 75 cmHg and 35 degrees Celsius.

Converting 75 cmHg to atmospheres:

P₂ = 75 cmHg * (1 atm / 76 cmHg) ≈ 0.9868 atm

so,

P2 = 75 cmHg / 76 cmHg/atm = 0.9868 atm.

Now we can substitute the values into the equation and calculate V2:

V2 = (1 atm / 0.9868 atm) * (T2 / 308.15 K) * (605 liters).

Please provide the new temperature (T2) in Celsius, and I will calculate the volume for you.\((n₁ * R * T₂) / P₂ = (n₁ * 0.0821 L·atm/(mol·K) * 308.15 K) / 0.9868 atm\)

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Answer:

2d

Explanation:

2d nije moguće. moguće je samo 3d do 7d. provjeri periodni sustav!

ako ne razumiješ, obrati mi pažnju

Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

The solubility of the salts is affected by the temperature changes. 1. NaCl is least affected by temperature. 2. supersaturated. 3. 60 grams KBr. 4. Ethanol has both polar and non-polar groups. 5. Mixing and shaking.

A KBr solution with 90 gm solute in 100 grams of water at 50 degrees is classified as supersaturated. 60 grams of KBr are needed to make a saturated solution in 100 gm of water at 30 degrees.

Ethanol is a general solvent due to the presence of both the polar and the non-Polar groups. As a result, it is easier to dissolve both polar molecules and non-Polar molecules. The dissolving rate can be increased by mixing or shaking the solution. Also, the sugar dissolves faster in hot than cold tea.

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Answer:

0.85g

Explanation:

This is a pretty straight forward equation, you would use PV=nRT to get this answer

Hope this helps!!!

31.0 mL of gasoline weighs 23.3 grams

The type of energy transfer between the frozen ice cream and the tongue is convection. The frozen ice cream will gradually melt because of the temperature difference.

Convection is the method of heat transfer that involves the transmission of heat in a fluid (liquid or gas) by the circulation of currents.

According to this question, a spoonful of frozen ice cream is placed on the tongue. The heat transfer will occur between the tongue with warmer temperature and the ice cream with colder temperature.

The heat energy will flow from the tongue to the ice cream, hence, making it defreeze or melt with time. This type of heat transfer is convection because it involves a fluid.

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