The following set of molecules each show a singlet. The chemical shifts (ppm) are 0.232, 3.052, 5.297 and 7.256. Match the shift to each molecule below CH2Cl_2 CHCl3 CH3Cl CH4

The new volume of the gas whose pressure was changed would be = 40 milliliters.

The initial volume(V1)of the gas= 20ml

The initial pressure(P1) = 4 atm

The final pressure(P2) = 2 atm

The final volume(V2) = ?

Using the general gas formula;

P1V1 = P2V2

V2 = P1V1/P2

= 4×20/2

= 40ml

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To solve this problem, I'll need some additional information related to the molar mass of butane (C4H10). Please provide the molar mass of butane so that I can proceed with the calculations.

A proton's density is equal to 3.962 E14 g/cm3, given that it has a mass of 1.0073 amu and a diameter of 1.73 1015 m.

Although protons were once thought to be elementary particles, the Standard Model of particle physics now recognises them as composite particles that comprise three valence quarks. Protons and neutrons are collectively referred to as hadrons.

Proton mass = 1.0073 amu, amu = 1.66054 E-24 g, and g proton = (1.0073 amu)(1.06654 E-24 g/amu = 1.074 E-24 g.

V = 4/3πr³\s∴ For example, r = D/2 ≈ 1.73 E-15 m)/2 = 8.65 E-16 m, where V = (4/3) (8.65 E-16 m) 3 = (1.074 E-24 g)/(2.711 E-39 cm3) = 3.962 E14 g/cm3

Protons include the H+ ion or the hydrogen atom's nucleus. Regardless of the isotope, each hydrogen atom has one proton, each helium atom has two, each lithium atom has three, and so on.

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Answer:

Offspring

I hope this is the word you want.

Offspring is used to mention both babies of animals and plants.

Answer:

Offspring

hope this helps and please give the above answer brainliest

Answer:

23.4 milliliters

Explanation:

Note 1: This answer assumes that the volume of CuNO3 is negligible
Note 2: CuNO3 can't be produced in any meaningful quantities and can't be obtained by the average chemist, maybe you meant Cu(NO3)2 instead?

From the definition of molarity, molarity = moles / volume
the number of moles is the number of grams divided by the molar mass, or
2.47 divided by 125.55 which is 0.01967

The M and moles is known so volume can be found.

0.82 = 0.01967 / volume
0.82 * volume = 0.01967
volume = 0.01967 / 0.82 = 0.023988 liters = 23.4 milliliters

Answer:

do not mix, non-polar, polar

Explanation:

In general, when hydrocarbons like oil are added to water, the two liquids do not mix because hydrocarbons are non-polar and water is polar.

As a general rule of solubility, we say "like dissolves like", meaning polar compounds are soluble in polar solvents and non-polar compounds are soluble in non-polar solvents

This is due to the intermolecular forces, which are dispersion forces for non-polar compounds and dipole-dipole interactions for polar compounds.

Answer:

true

Explanation:

heat will destroy the salt components quicker

The compound has an empirical formula of \(K_2H_2P_2O_8\) and a molecular formula of \(K_2HPO_4\).

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The correct question would be as

The composition of a compound is 28.73% K. 1.48% H, 22.76% P, and 47.03% O. The molar mass of the compound is 136.1 g/mol. What is the Molecular Formula of the compound?

\(KH_2PO_4\\KH_3PO_4\\K_2H_4P_20_{12}\\K_2H_3PO_6\)

Answer:

Image A

Explanation:

The hemisphere experiences summer when it is tilted towards the sun. Image a has the northern hemisphere tilted towards the sun.

Answer:

image A

Explanation:

this is because the sun is hitting earth at a steep angle

Answer:

It is called the Random Walk, where the next move (as seen through the motion of gas particles) depends on chance.

Explanation:

The binding energy per nucleon for the ¹⁹F nucleon is equal to 7.786 MeV/nucleon.

Binding energy can be defined as the minimum quantity of energy that is required to remove the particle from the system. Nuclear binding energy can be described as the energy required to dismantle a nucleus of an atom into free neutrons and protons.

The binding energy will be determined from the mass defect. Mass defect is calculated from the difference between the mass observed and the expected combined mass.

Given the mass of the ¹⁹F = 18.9984 a.m.u.

The mass defect for the ¹⁹F can be calculated as:

Δm = \((M _n +M_p) - M_F\)

\(\triangle m =( 9\times 1.0078 + 10 \times 1.0087 )- 18.9984\)

\(\triangle m =0.1588 \;a.m.u.\)

The binding energy for the fluorine can be calculated as:

E = Δmc²

E = 0.1588 × 931.5

E = 147.92 MeV

The binding energy per nucleon of ¹⁹F can be calculated as:

B.E.N. = 147.92/18.9984 = 7.786 MeV per nucleon

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Answer:

the mas is .291 g

Explanation:

the mass of a object does not change. so when added the substance the beaker. you had the mass of both objects together. you know the mass of the beaker and you know the mass of both. since mass does not change. the beakers mass is still 74.605g. the mass of both objects is 74.896. all you have to do is subtract the mass of the beaker from the total mass. 74.896 - 74.605 equals .291g. so the mass of the unknown substance Is .291g

I belive that your answer would be False

Answer:

Plasma globes use high voltage, low current electrical discharges to ionize gases, typically a mixture of noble gases such as argon and neon, inside the globe. The electrical discharge excites the gas atoms, stripping them of their electrons to create a cloud of positively charged ions and negatively charged electrons, also known as plasma. The electrical discharge arcs between the electrodes in the globe, creating the colorful, dancing lights that are characteristic of plasma globes.

Explanation:

Molarity, M = (n x 1000) / vol (in ml)

M = 17.2 x 1000/ 2000

M = 8.6 mol/L

The student needs to add approximately 83.3 mL of 12 M HCl solution to the existing 1 L of 2 M HCl solution to increase the concentration to 3 M. It is important to handle concentrated acids with caution and follow proper safety procedures.

To increase the concentration of a 1 L solution of 2 M HCl to 3 M, the student needs to calculate the volume of concentrated HCl needed and add it to the existing solution. Here's how the calculation can be done:

Given:

Initial concentration of HCl solution = 2 M

Final concentration desired = 3 M

Initial volume of HCl solution = 1 L

Step 1: Calculate the moles of HCl in the initial solution.

Moles of HCl = Initial concentration × Initial volume = 2 M × 1 L = 2 moles

Step 2: Calculate the moles of HCl needed for the desired concentration.

Moles of HCl needed = Final concentration × Final volume = 3 M × 1 L = 3 moles

Step 3: Calculate the moles of HCl to be added.

Moles of HCl to be added = Moles needed - Moles present = 3 moles - 2 moles = 1 mole

Step 4: Convert the moles of HCl to the required volume of concentrated HCl.

To calculate the volume, we need to know the concentration of the concentrated HCl solution. Assuming it is 12 M, we can use the following formula:

Volume of concentrated HCl = Moles of HCl to be added / Concentration of concentrated HCl

Volume of concentrated HCl = 1 mole / 12 M = 0.0833 L or 83.3 mL

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Answer:

c) removing fluoride ions.

Explanation:

Hello!

In this case, for this solubility product problem, it is very convenient to write the undergoing ionization reaction:

\(CaF_2(s)\rightleftharpoons Ca^{2+}(aq)+2F^-(aq)\)

In such a way, via the Le Chatelier's principle, we remember that the addition of reactants shifts the reaction towards products, adding products shifts the reaction towards reactants, removing reactants shifts the reaction towards reactants and removing products shifts the reaction towards products. In means, that the best way to shift this reaction away from solid calcium fluoride and toward the dissolved ions is c) removing fluoride ions, because it is a product and its removal favors the formation of more products.

Best regards!

Answer:

43.63 g of water.

Explanation:

We can use the equation for heat transfer to solve for the mass of water:

q = cmΔT

where

q = heat transfer

c = specific heat

m = mass

ΔT = change in temperature

The heat transfer from the copper to the water can be expressed as:

q = cmΔT

q = (33.41 g)(0.385 J/g°C)(95.6°C - 21.65°C)

And the heat transfer caused a change in temperature in the water, which can be expressed as:

q = mLΔT

q = (m)(4.18 J/g°C)(ΔT)

Equating the two expressions for heat transfer, we can solve for the mass of water:

(33.41 g)(0.385 J/g°C)(95.6°C - 21.65°C) = (m)(4.18 J/g°C)(22.87°C - 21.65°C)

m = (33.41 g)(0.385 J/g°C)(95.6°C - 21.65°C) / (4.18 J/g°C)(22.87°C - 21.65°C)

m = 43.63 g

So the copper was added to 43.63 g of water.

The pressure inside the tire is approximately 1.970796 newtons per square centimeter (N/cm²) when measured in those units.

To convert the pressure from pounds per square inch (psi) to newtons per square centimeter (N/cm²), we need to use the conversion factors between these units.

First, let's convert pounds to newtons:

1 pound = 0.45359237 kilograms

1 kilogram = 9.80665 newtons

Next, let's convert square inches to square centimeters:

1 square inch = 6.4516 square centimeters

Now, we can perform the conversion:

1 psi = (0.45359237 kg) × (9.80665 N/kg) / (6.4516 cm²)

≈ 0.070307 N/cm²

Therefore, the pressure inside the tire of 28.0 psi is approximately equal to 28.0 × 0.070307 N/cm², which is approximately 1.970796 N/cm².

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C₃H₈ has an empirical formula mass of 44 g/mol. Hence, C₃H₈ is also the molecular formula.

When twο οr mοre distinct elements are chemically mixed in a specific ratiο, the resultant substance is knοwn as a cοmpοund.  Chemical bοnds, such as cοvalent bοnds, iοnic bοnds, οr metallic bοnds, hοld the cοnstituent parts οf a cοmpοund tοgether.

We must first cοmpute the mοles οf each element present in the cοmpοund in οrder tο derive its empirical fοrmula.

We can figure οut hοw many mοles οf carbοn and hydrοgen there are in 100 g οf the chemical by dοing the fοllοwing calculatiοn:

81.71 g / 12.011 g/mol = 6.80 moles of carbon

18.29 g / 1.008 g/mol of hydrogen = 18.15 moles.

The simplest whole number ratio of carbon to hydrogen atoms must next be determined. In order to do this, we divide both values by the lesser amount, in this case 6.80 moles:

Carbon: 6.80 moles / 6.80 moles = 1.00 Hydrogen: 18.15 moles / 6.80 moles = 2.67

To get whole numbers, we must multiply both values by a factor. By multiplying each by 3, the smallest whole number ratio is obtained:

1.00 x 3 = 3 carbon

2.67 x 3 = 8.01 x 8 for hydrogen.

As a result, the compound's empirical formula is C₃H₈.

Knowing the compound's molecular weight is necessary to determine its molecular formula. The compound's MWt (molecular weight) is 44, as stated.

C₃H₈ has an empirical formula mass of 44 g/mol. Hence, C₃H₈ is also the molecular formula.

Any molecule with the empirical formula C₃H₈, like propane, might be the structural formula of the chemical (CH₃CH₂CH₃).

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a. As per the balanced reaction, 2 moles of hexane gives 12 moles of carbon dioxide. Then, 7.77 moles of hexane will give 46.2 moles of carbon dioxide.

Combustion is an exothermic reaction in which a gas reacts with oxygen to give carbon dioxide and water. Given the combustion reaction of hexane gas.

b. molar mass of hexane = 86 g/mol

no.of moles in 8.11 g = 8.11 /86 = 0.094 g

2 moles of hexane gives 12 moles of carbon dioxide. Then 0.094 moles of hexane will give

0.094 × 12/2 = 0.56 moles

molar mass of carbon dioxide = 44 g/mol

then, mass of 0.56 moles = 0.56 × 44 = 24.6 g

c. 2 moles of hexane reacts with 19 moles of oxygen gas. Then, 25 moles of hexane needs to reacts with 237.5 moles of oxygen gas.

mass of oxygen gas = 32 g/mol

mass of 237.5 moles = 32 × 237.5 = 7600 g of oxygen is needed.

d. 2 moles of hexane gives 14 moles of water vapor. That is 172 g of hexane gives (18 × 14) 252 g of water.

then, 55.3 kg of hexane gives:

(55.3 kg × 0.252 kg)/0.172 kg = 81 kg.

Therefore, 81 kg of water vapor is produced from 55.3 kg of hexane.

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Many island chains were formed as a result of blank volcanism is known as hotspot volcanism.

Hotspot volcanism occurs when a mantle plume, a column of hot and buoyant rock material rising from deep within the Earth's mantle, reaches the surface. These mantle plumes are stationary relative to the moving tectonic plates on the Earth's surface.

As the tectonic plate moves over the stationary hotspot, the mantle plume melts and produces magma. This magma rises through the Earth's crust, creating a volcanic eruption. Over time, repeated eruptions build up layers of lava and volcanic material, forming a cone-shaped volcano. As the tectonic plate continues to move, the volcano becomes inactive, and a new volcano forms above the stationary hotspot.

However, in the case of island chains, the tectonic plate movement carries the volcanoes away from the hotspot. As a result, a trail of extinct volcanoes is left behind, forming a linear chain of islands. Each island in the chain represents a period of volcanic activity at that specific location as the plate moved over the hotspot.

Hotspot volcanism and the formation of island chains provide valuable insights into the dynamics of Earth's mantle and plate tectonics. By studying the age progression of islands in a chain, scientists can gain a better understanding of the movement and speed of tectonic plates and the behavior of mantle plumes deep beneath the Earth's surface.

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The molar mass of the carbohydrate : = 304.19 g/mol

Given

6.54 g carbohydrate

102.5 g of water

osmotic pressure of 4.61 atm

T = 20+273=293 K

Required

The molar mass

Solution

General formula:  

\(\large {\boxed {\bold {\pi \: = \: M \: x \: R \: x \: T}}}\)

π = osmosis pressure (atm)  

M = solution concentration (mol / l)  

R = constant = 0.08205 L atm mol-1 K-1  

T = Temperature (Kelvin)  

Find molarity(M) :

4.61 atm = M . 0.08205 x 293

M = 0.192 mol/L(mol solute per 1 liter solution)

Total mass of solution :

= 6.54 g + 102.5

= 109.04 g

Volume of solution :

= density x mass

= 1.024 g/ml x 109.04 g

= 111.66 ml

= 0.112 L

mol Carbohydrate (solute):

= M x V

= 0.192 x 0.112

= 0.0215 mol

Molar mass of Carbohydrate :

= mass : mol

= 6.54 : 0.0215

= 304.19 g/mol

Answer and Explanation: Sample A is a mixture. Solubility is characteristics of each substance, which means a substance can be distinguished from other substances and can be useful to separate mixtures.

In Sample A, when is added different volumes of water, the resulting powder has different mass. This means there are more than one substance forming the yellow cube. Therefore, sample A is a mixture.

Sample B is a pure substance. Each substance has its own melting point. Whe na pure substance reaches its melting point, temperature is constant until all of that substance is melted. In sample B, temperature is stable at 66.2°C and then, after all the powder is melted, it rises again. Therefore, sample B is a pure substance.

Answer:

Explanation:

Here, we want to get the most ionic fluoride

Cs is a group 1 element, same as sodium

However, we know that electropositivity increases down the group while electronegativity decreases down the group

Also, electropositivity decreases across the period. It is expected that a group 1 element will be more electropositive than a group 3 element.

Thus, we are having a bond between a very electropositive metal and a very electronegative non-metal. That is why we have CsF (it is the strongest and most electropositive atom in the options listed) as the molecule with the strongest ionic bond on the list

Answer:

The difference between the two is:

\([Kr]4d^1^05s^25p^2\) is the Orbital Occupancy

\([Kr]5s^24d^1^05p^2\) is the Orbital Filling Order

Both are correct, I don't think your teacher will be so nit-picky to care.

Answer:

11.1 moles of CO2

Explanation:

2C2H6(g) + 7O2(g)⟶4CO2(g)+6H2O(g)

To find the number of moles of CO2 produced when 5.55 mol of ethane is burned in an excess of oxygen, use the stoichiometry of the reaction.

5.55 mol C2H6 x (4 mol CO2/2 mol C2H6) = 11.1 mol CO2

Therefore, 5.55 mol of ethane is burned in an excess of oxygen produces 11.1 moles of CO2.

The greater the electrostatic attraction in the molecule, the greater the boiling point of the compound.

We have to note that the molecular structure of a compound determines whether the compound will be polar or not and this in turn affects the electrostatic forces in the molecule.

Also, the electrostatic forces in the molecule determines certain important properties of the compound such as boiling point. The greater the electrostatic attraction in the molecule, the greater the boiling point of the molecule.

Hence, the  statement which correctly describes the relationship between molecular structure, the strength of electrostatic forces  between molecules, and the boiling point of a substance is; "molecular structure affects the strength of electrostatic forces, which can affect the boiling point of a substance."

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