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3 years ago

Classify the following dienes and polyenes as isolated, conjugated, cumulated, or some combination of these classifications.

Chemistry

1 answer:

lawyer [7]3 years ago

8 0

Answer:

cycloocta-1,4-diene- isolated double bond

cycloocta-1,3-diene- conjugated double bond

cyclodeca-1,2-diene- cumulated double bond

cycloocta-1,3,5,7-tetraene- conjugated double bond

cyclohexa-1,3,5-triene (benzene) - conjugated double bond

penta-1,2,4-triene- cumulated and conjugated double bond

Explanation:

A conjugated double bond is a system that contains alternate double and single bonds. It is renowned for its unusual stability.

A cumulated double bond is a double bond system involving about three atoms e.g C=C=C.

An isolated double bond is a system of double bonds separated by more than one single bond.

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Explain and describe how the photoelectric effect occurs on an atomic level in terms of protons, neutrons, and electrons

grin007 [14]

Answer:

The photoelectric effect is the emission of electrons when electromagnetic radiation, such as light, hits a material. Electrons emitted in this manner are called photoelectrons.

Based on the wave model of light, physicists predicted that increasing light amplitude would increase the kinetic energy of emitted photoelectrons, while increasing the frequency would increase measured current.

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2 years ago

Sucralfate (molecular weight: 2087 g/mol) is a major component of Carafate®, which is prescribed for the treatment of gastrointe

dybincka [34]

Answer:

Option b. 0.048 M

Explanation:

We have the molecular weight and the mass, from sulcralfate.

Let's convert the mass in g, to moles

1 g . 1 mol / 2087 g = 4.79×10⁻⁴ moles.

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Let's convert the volume of solution in L

10 mL . 1L/1000 mL = 0.01 L

4.79×10⁻⁴ mol / 0.01 L = 0.048 mol/L

3 0

3 years ago

Help me with number 19 and 20 please

Doss [256]

19) it's not balanced because when adding h2 and o2 u get h2o2 not h2o
20) I'm not sure

7 0

3 years ago

It is easier to determine the electron configurations for the p-block elements in periods 1, 2, and 3 than to determine the elec

andreyandreev [35.5K]

Answer:

See Explanation

Explanation:

Because you have to get through the d-block electron configurations for the rest of the p-block elements which is a hassle to do. You need to know how to account for electron stability, from which subshell to remove electrons, etc. because it is all weird for d-block.

8 0

2 years ago

How many moles are in 98.3 grams of aluminum hydroxide, Al(OH)3?

Musya8 [376]

We have to calculate the molar mass of AL(OH)₃
Atomic mass (Al)=27 amu
Atomic mass (O)=16 amu
Atomic mass (H)=1 amu

molecular weight= 27 amu+3(16 amu + 1 amu) =78 amu.

Therefore, the molar mass of Al (OH)₃ is 78 g/ mol

Now, we calculate the number of moles in 98.3 g of aluminum hydroxide.

78 g-------------------1 mol
98.3 g----------------- x

x=(98.3 g * 1 mol) / 78 g=1.26 moles.

Answer: 1.26 moles.

6 0

3 years ago