A 5.0-mL sample of CO2 gas is enclosed in a gas-tight
syringe (Figure 11.3) at 22 °C. If the syringe is
immersed in an ice bath (0 °C), what is the new gas
volume, assuming that the pressure is held constant?

Explanation:

Using a fractional column will help to separate liquids whit different boiling points since the mixture contain ethanol water and propanaol. Ethanol will be the first to be extracted since it has a low boiling point then it would be water and then propanaol.

Al(NO3)3 solution concentration and the concentration of H3O+ ions in the solution following the addition of HNO3 are given in the problem. We can determine the presence of [Al(H2O)5(OH)2+] in the solution using this knowledge along with the known equilibria for the hydrolysis of Al3+.

For Al3+, the hydrolysis process may be expressed as follows:

Al(H2O)63+ + water becomes Al(H2O)5(OH)2+ + H3O+.

The reaction's equilibrium constant expression is as follows:

Al(H2O)5(OH)2+) = K

Al(H2O)63+ / [H3O+]

We must take into account the dissociation of Al(NO3)3 in water in order to determine [Al(H2O)5(OH)2+] in a 0.15 M solution of Al(NO3)3:

Al3+ (aq) + 3NO3- Al(NO3)3 (s) (aq)

Al3+ has a concentration of 0.45 M (3 times that of the Al(NO3)3 solution) in an Al(NO3)3 solution with a concentration of 0.15 M. H3O+ is present in the solution at a concentration of 0.10 M.

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Answer:

Mechanical

Explanation:

Since, this mechanical energy gets converted into thermal energy due to which hairs get dry. Thus, we can conclude that the energy transformation that occurs when a hair dryer is plugged in and turned on is that electrical energy transforms into mechanical and thermal energy.

Answer:Rubidium and Strontium

Explanation:

Answer:

• pH = 3.0

• pH = 2.70

• pH = 3.61

• pH = 8.28

• pH = 1.40

Explanation:

El pH es una medida en química usada para determinar el grado de acidez o basicidad en una solución.

Se define como:

pH = -log₁₀ [H⁺]

El - logaritmo de la concentración molar de H⁺

Para las concentraciones de H⁺ dadas:

• [H+] = 0.001 M

pH = -log (0.001M) = 3

pH = 3.0

• [H+] = 0.002 M

pH = -log (0.002M)

pH = 2.70

• [H+] = 2.45X10-4 M

pH = -log (2.45X10-4 M )

pH = 3.61

• [H+] = 5.2X10-9 M

pH = -log (5.2X10-9 M)

pH = 8.28

• [H+] = 0.04 M

pH = -log (0.04M)

pH = 1.40

During one of the trials in this project, the initial weight of ethanol is 86 g and after the combustion, the final weight of ethanol is 11. Hence, 1.63 moles of ethanol was consumed.

To determine the number of moles of ethanol consumed during the experiment, we first need to calculate the change in mass of ethanol.

Change in mass = Initial mass - Final mass
Change in mass = 86 g - 11 g
Change in mass = 75 g

Next, we need to convert the change in mass from grams to moles using the molar mass of ethanol.

Molar mass of ethanol = 46.07 g/mol

Number of moles of ethanol consumed = Change in mass / Molar mass
Number of moles of ethanol consumed = 75 g / 46.07 g/mol
Number of moles of ethanol consumed = 1.63 mol

Therefore, during this trial in the project, 1.63 moles of ethanol were consumed during the experiment.

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The boiling points of alkenes and alkynes are generally lower than those of alkanes.

phase observed:

a.) Methane, Ethane, Propane, and Butane are in a gaseous form in Alkanes (Table 1).

The liquid states of pentene, hexane, heptane, and octane are present.

in alkenes (table 2)

Gaseous forms of ethene, propane, and 1-butane exist.

Both one-pentene and one-hexene are liquids.

c.) Ethyne, propyne, and 2-butane are in the gas phase whereas pentyne is in the liquid phase in the alkynes (table 3).

Number of carbon atoms actually seen:

Alkanes - join one carbon atom to another in a single bond.

Double bonds between carbon atoms are formed in alkenes.

Triple bonds between carbon atoms are formed in alkynes.

Boiling point:The structure of alkanes, alkenes, and alkynes is shown by their boiling points. when a material transitions from the liquid to gas phases, its temperature.

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The mole ratio between copper in reaction 1 and the copper in reaction 2 and 3 is 1:1.

The mole ratio represents the proportion of the amounts of two substances in a chemical reaction, measured in moles.

Mole ratio is commonly used in stoichiometric calculations in chemistry, which helps to balance equations and to predict the amount of reactants needed to produce a particular product.

In the three reactions that have been performed, the mole ratio between copper in reaction 1 and the copper in reaction 2 and 3 is 1:1.

This means that the amount of copper present in reaction 1 is equal to the amount of copper present in reactions 2 and 3.

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Answer:

el río esta libertad haora

Explanation:

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88388811111q1

Hey there !

Mass = 237 g

Volume 237 mL

Therefore:

Density = mass / Volume

D = 237 / 237

D = 1.0 g/mL

Hope this helps!

Answer:

Physical

Explanation:

Water is the chemical form of 2 hydrogen and 1 oxygen (H2O)

It is still H2O, as nothing made it chance that formula.

One characteristic of lipase enzymes is their ability to hydrolyze triglycerides into fatty acids and glycerol.

Lipase enzymes are a class of enzymes that play a crucial role in the breakdown and metabolism of lipids (fats). One of the main characteristics of lipase enzymes is their ability to catalyze the hydrolysis of triglycerides, which are the main storage form of fats in the body.

Triglycerides consist of three fatty acid molecules esterified to a glycerol molecule. Lipase enzymes act on the ester bonds between the fatty acids and glycerol, breaking them down. This hydrolysis reaction results in the release of individual fatty acids and glycerol.

By breaking down triglycerides, lipase enzymes facilitate the digestion and absorption of dietary fats in the digestive system. They are produced in various tissues and organs, including the pancreas, liver, and adipose tissue.

Lipase enzymes have broad substrate specificity and can act on different types of lipids, such as dietary fats and lipid molecules stored in cells. Their activity is crucial for the mobilization and utilization of fats as an energy source and for various physiological processes in the body.

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Ionic compounds include at least 1 metal because metals need to donate electrons. (In ionic bonds one compound takes electrons, therefore you need a metal to donate electrons).

Otherwise, with two non-metals the compounds would likely share electrons.

Answer: Calcium carbonate reacts with hydrochloric acid to form calcium chloride, water and carbon dioxide

Explanation:

Answer: A toaster

Explanation: A toaster is an house held item that is used for heating and toasting bread and other stuff.

Answer:

The answer is

21.5 L

.

So, start with the balanced chemical equation for the decomposition of hydrochloric acid

2

HCl

→

H

2

+

Cl

2

Notice that you have a

2:1

mole ratio between

HCl

and

Cl

2

, which means that every 2 moles of the former will produce 1 mole of the latter. The number of moles of

HCl

you have is.

Explanation:

I don't know if that is but I try my best just correct me if I'm wrong thank you!!

Answer:

option 3, the leaves higher up need less water since there getting more light and the ones lower need to adapt to gaining more water since they won't be seeing much light

The hybridization expect for Carbon in ethyne (C₂H₂) is sp atomic orbital hybridization.

In ethyne (C₂H₂), each carbon atom forms two sigma bonds and two pi bonds. The sigma bonds are formed by the overlap of hybrid orbitals, while the pi bonds are formed by the overlap of unhybridized p orbitals.

In its ground state, carbon has the electronic configuration 1s² 2s² 2p². To form bonds, carbon undergoes hybridization, where its valence electrons are rearranged into hybrid orbitals.

In ethyne, each carbon atom forms two sigma bonds: one sigma bond with another carbon atom and one sigma bond with a hydrogen atom. To accommodate these bonds, carbon undergoes sp hybridization, where one 2s orbital and one 2p orbital combine to form two sp hybrid orbitals.

The hybridization process involves the promotion of one electron from the 2s orbital to an empty 2p orbital. The resulting configuration for each carbon atom is two half-filled sp hybrid orbitals and two unhybridized 2p orbitals. The two sp hybrid orbitals point in opposite directions, creating a linear arrangement.

The two carbon atoms in ethyne then overlap their sp hybrid orbitals to form a sigma bond. Additionally, the unhybridized 2p orbitals on each carbon atom overlap sideways to form two pi bonds. These pi bonds involve the sideways overlap of parallel p orbitals, resulting in the formation of a pi bond above and below the molecular plane.

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Answer:

atoms bonding

Explanation:

Answer:

603000 J

Explanation:

The following data were obtained from the question:

Energy required (Q) =...?

Mass (M) = 10000 g

Specific heat capacity (C) = 2.01 J/g°C

Overheating temperature (T2) = 121°C

Working temperature (T1) = 91°C

Change in temperature (ΔT) =.?

Change in temperature (ΔT) =T2 – T1

Change in temperature (ΔT) = 121 – 91

Change in temperature (ΔT) = 30°C

Finally, we shall determine the energe required to overheat the car as follow:

Q = MCΔT

Q = 10000 × 2.01 × 30

Q = 603000 J

Therefore, 603000 J of energy is required to overheat the car.

The mass of hydrogen atoms in the sample of water is 3.98g

This can be solved by understanding of Avogadro's number and mole relationship concept.

This is a proportionality that relates the number of particles to the amount of substance in that sample and it is given as \(6.02*10^2^3\)

A molecule of water have the chemical formula as H\(_2\)O. This implies that for every 1 atom or molecule of oxygen, 2 hydrogen must be present.

In the question given, we have \(12*10^2^3\) atoms of oxygen. This implies we must have \(2*(12*10^2^3)=2.4*10^2^4\)

Now, let's compare this molar mass - Avogadro's number

molar mass of hydrogen = 1g/mol

\(1g/mol=6.023*10^2^3particles\\xg=2.4*10^2^4particles\\x=\frac{1*2.4*10^2^4}{6.023*10^2^3}\\x=3.98g\)

From the calculation above, we would have 3.98g of hydrogen present in that particles of oxygen.

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In quantum mechanics, the angular momentum quantum number "l" defines the shape of the atomic orbital. The l value is an integer ranging from 0 to (n-1) where n is the principal quantum number.

Therefore, for an electron in the L(n=2) shell of an atom, the possible values of the angular momentum quantum number l would range from 0 to 1, since n=2.

This is because the L shell is the second shell, which has n=2. Therefore, it can have subshells with l=0 and l=1, also known as the s and p subshells respectively.

The angular momentum quantum number also has an effect on the energy of the electron, with higher l values having higher energy.

Thus, the possible values of the angular momentum quantum number l for an electron in the L(n=2) shell of an atom are l=0 and l=1.

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Answer:

size and shape because solids nomally have a fixed shape and volume

I think it would be, C. Size and Shape.

Because, when measuring objects in solids u should measure the Size because the color is just paint and the texture is just how it feels. The shape can be measured in solids too.

So, your answer is C.

Good job if you made it this far!

Your reward?

I'll befriend you!

!

Answer:

its C........................

The following two structures are Isomers.

Isomers are compounds that contain exactly the same number of atoms, i.e., they have exactly the same empirical formula, but differ from each other by the way in which the atoms are arranged. Examples of isomers with the formula C8H10 are ethyl benzene, m-xylene, p-xylene, and o-xylene.

What are the 3 types of isomers?

There are three types of structural isomers: chain isomers, functional group isomers, and positional isomers.

Isomers are molecules with the same chemical formula but have different structures. Isomers differ in how their bonds are positioned to surrounding atoms.

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Answer:

Explanation:

as we know that 1kg =1,000,000 mg

therefore

0.425 kg= 0.425*1,000,000/1=425000

result:

0.425 kg contain 425000 mg

i hope this will help you

The volume of nitric oxide that will diffuse out of the partition in 10 seconds when methane diffuses is 62.5 mL

This is defined as the amount diffused per unit time. Mathematically, it can be expressed as

Rate = volume / time

Rate = volume / time

Rate = 25 / 4

Rate = 6.25 mL/s

Rate = volume / time

6.25 = volume of nitric oxide / 10

Cross multiply

Volume of nitric oxide = 6.25 × 10

Volume of nitric oxide = 62.5 mL

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Answer:

it can affect ur research

Explanation:

we need to do this because temperature and pressure can effect our results. In order to get the most accurate results possible we must keep conditions of a substance that we can control the same.

Calcium ion created by the calcium atom losing two electrons has 18 electrons.

A neutral calcium atom has 20 electrons. When it loses two electrons, it becomes a calcium ion with a +2 charge. Since electrons have a negative charge, a calcium ion with a +2 charge will have 2 fewer electrons than a neutral calcium atom.

The calcium ion is a positively charged ion that has lost two electrons from the neutral calcium atom. It has a 2+ charge and is represented as Ca2+. The electronic configuration of the calcium ion is 1s² 2s² 2p⁶ 3s² 3p⁶, which means it has a total of 18 electrons. Thus, a calcium ion with a +2 charge will have 18 electrons.

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