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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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Write a balanced chemical equation to represent the reaction of ethane with Br2.
Write a balanced chemical equation to represent the reaction of ethane with Br2.
Write a balanced chemical equation to represent the reaction of ethane with Br2.
A) CH3CH2CH3 + Br2    CH3CH2CH2Br + HBr
B) CH3CH3 + Br2    CH3CH2Br + HBr
C) CH3CH2CH3 + Br2    BrCH2CH2CH2Br + H2
D) CH3CH3 + Br2    BrCH2CH2Br + H2
E) CH3CH3 + Br2    
083055   143   2 Replies
3 years ago
Choose the saturated fatty acid from the compounds below.
Choose the saturated fatty acid from the compounds below.
Choose the saturated fatty acid from the compounds below.
A)
 

B)
 

C)
 

D)
 

E)
083055   48   1 Reply
5 years ago
In the protein, Arg-Pro-Lys-Val, which amino acid contains the C-terminal group?
In the protein, Arg-Pro-Lys-Val, which amino acid contains the C-terminal group?
In the protein, Arg-Pro-Lys-Val, which amino acid contains the C-terminal group?
A) arginine
B) lysine
C) valine
D) proline
083055   66   1 Reply
5 years ago
Determine the oxidation state of sulfur in SO2.
Determine the oxidation state of sulfur in SO2.
Determine the oxidation state of sulfur in SO2.
A) +3
B) +6
C) +2
D) +4
E) 0
083055   63   1 Reply
5 years ago
________ is a soft-white metal that has been found as a contaminant in crude oil.
________ is a soft-white metal that has been found as a contaminant in crude oil.
________ is a soft-white metal that has been found as a contaminant in crude oil.
A) Vanadium
B) Gold
C) Silver
D) Mercury
E) Copper
083055   74   1 Reply
5 years ago
Identify the element that has the most crystal structures at varying temperatures.
Identify the element that has the most crystal structures at varying temperatures.
Identify the element that has the most crystal structures at varying temperatures.
A) nickel
B) copper
C) vanadium
D) cobalt
E) manganese
083055   27   1 Reply
5 years ago
Choose the valence orbital diagram that represents the ground state of Sr2.
Choose the valence orbital diagram that represents the ground state of Sr2.
[html]Choose the valence orbital diagram that represents the ground state of Sr2⁺.

•
083055   85   1 Reply
5 years ago
The base-dissociation constant of ethylamine (C2H5NH2) is 6.4 10-4 at 25.0C. The [H+] in a solution ...
The base-dissociation constant of ethylamine (C2H5NH2) is 6.4 10-4 at 25.0C. The [H+] in a solution ...
[html]The base-dissociation constant of ethylamine (C2H5NH2) is 6.4 × 10-4 at 25
083055   112   1 Reply
5 years ago
Identify the nuclide that has the longest half-life.
Identify the nuclide that has the longest half-life.
[html]Identify the nuclide that has the longest half-life.

•
083055   71   1 Reply
5 years ago
The following reaction represents what nuclear process? H + H He + n
The following reaction represents what nuclear process? H + H He + n
[html]The following reaction represents what nuclear process?

 
083055   62   1 Reply
5 years ago
Determine the identity of the daughter nuclide from the electron capture by Be.
Determine the identity of the daughter nuclide from the electron capture by Be.
[html]Determine the identity of the daughter nuclide from the electron capture by
083055   92   1 Reply
5 years ago
Determine the products of the following reaction:
Determine the products of the following reaction:
[html]Determine the products of the following reaction:
083055   66   1 Reply
5 years ago
Name the following compound.
Name the following compound.
[html]Name the following compound.
083055   47   1 Reply
5 years ago
Compute the empirical and molecular formulas for the compound of molecular weight 180 g/mol which is ...
Compute the empirical and molecular formulas for the compound of molecular weight 180 g/mol which is ...
Compute the empirical and molecular formulas for the compound of molecular weight 180 g/mol which is shown to contain 40.0% C and 6.7% H by elemental analysis.
083055   91   1 Reply
5 years ago
Write an equation to describe the initiation step in the chlorination of methane.
Write an equation to describe the initiation step in the chlorination of methane.
Write an equation to describe the initiation step in the chlorination of methane.
083055   49   1 Reply
5 years ago
What is the name of the major monobrominated product which results when 3-methylpentane is subjected ...
What is the name of the major monobrominated product which results when 3-methylpentane is subjected ...
What is the name of the major monobrominated product which results when 3-methylpentane is subjected to Br2/hν conditions?
083055   59   1 Reply
5 years ago
Given that tertiary H atoms react with a chlorine radical about 5.5 times faster than primary ones, ...
Given that tertiary H atoms react with a chlorine radical about 5.5 times faster than primary ones, ...
Given that tertiary H atoms react with a chlorine radical about 5.5 times faster than primary ones, estimate the ratio of the two monochlorinated products that result when 2,3-dimethylbutane undergoes free radical chlorination.
083055   49   2 Replies
5 years ago
In the molecule below, show how C3 is not a chirality center, but is is a stereocenter.
In the molecule below, show how C3 is not a chirality center, but is is a stereocenter.
[html]In the molecule below, show how C3 is not a chirality center, but is is a stereocenter.

083055   88   2 Replies
5 years ago
The following structure is a proteasome inhibitor that may find application in treating cervical ...
The following structure is a proteasome inhibitor that may find application in treating cervical ...
[html]The following structure is a proteasome inhibitor that may find application in treating cervical cancer (J. Med. Chem. 2011, 449).  The halides in this structure m
083055   58   1 Reply
5 years ago
Identify the correct name for the following structure.
Identify the correct name for the following structure.
[html]Identify the correct name for the following structure.

083055   53   1 Reply
5 years ago
Name the major alcohol product which results when 3,3-dimethylbut-1-ene is treated with dilute acid.
Name the major alcohol product which results when 3,3-dimethylbut-1-ene is treated with dilute acid.
Name the major alcohol product which results when 3,3-dimethylbut-1-ene is treated with dilute acid.
083055   49   3 Replies
5 years ago
Provide the IUPAC name for Cl3C(CH2)2CCH.
Provide the IUPAC name for Cl3C(CH2)2CCH.
Provide the IUPAC name for Cl3C(CH2)2C≡CH.
083055   26   1 Reply
5 years ago
In a 1-butanol molecule, what part of the molecule is described as hydrophilic?
In a 1-butanol molecule, what part of the molecule is described as hydrophilic?
In a 1-butanol molecule, what part of the molecule is described as hydrophilic?
083055   39   1 Reply
5 years ago
Provide the name of the major organic product that results when 1-pentene is treated with aqueous acid.
Provide the name of the major organic product that results when 1-pentene is treated with aqueous acid.
Provide the name of the major organic product that results when 1-pentene is treated with aqueous acid.
083055   65   2 Replies
5 years ago
Reaction of ethylmagnesium bromide with which of the following compounds yields a secondary alcohol ...
Reaction of ethylmagnesium bromide with which of the following compounds yields a secondary alcohol ...
[html]Reaction of ethylmagnesium bromide with which of the following compounds yields a secondary alcohol after quenching with aqueous acid?

• ethylene oxide

• n-butyllithium

• (CH
083055   45   1 Reply
5 years ago
Show the acetonide that is formed when 1,2,4,5-tetrahydroxybenzene reacts with 2 equivalents of ...
Show the acetonide that is formed when 1,2,4,5-tetrahydroxybenzene reacts with 2 equivalents of ...
Show the acetonide that is formed when 1,2,4,5-tetrahydroxybenzene reacts with 2 equivalents of acetone under acidic conditions.
083055   56   1 Reply
5 years ago
Arrange the carboxylic acid derivatives below in order of increasing reactivity towards nucleophilic ...
Arrange the carboxylic acid derivatives below in order of increasing reactivity towards nucleophilic ...
[html]Arrange the carboxylic acid derivatives below in order of increasing reactivity towards nucleophilic acyl substitution.
083055   89   2 Replies
5 years ago
Which of the following would not have a C-H stretch at about 3050 cm-1?
Which of the following would not have a C-H stretch at about 3050 cm-1?
[html]Which of the following would not have a C-H stretch at about 3050 cm-1?

• 2-methyl-2-pentene

• 1-pentene

• 2-pentene

• 2,3-dimethyl-2-pentene

• 2,
083055   46   1 Reply
5 years ago
Draw structures which show the hydrogen bonding interaction that exists between water and dimethyl ether.
Draw structures which show the hydrogen bonding interaction that exists between water and dimethyl ether.
Draw structures which show the hydrogen bonding interaction that exists between water and dimethyl ether.
083055   82   1 Reply
5 years ago
When cycloheptatriene is deprotonated, an anion with seven resonance forms of equal energy can be ...
When cycloheptatriene is deprotonated, an anion with seven resonance forms of equal energy can be ...
When cycloheptatriene is deprotonated, an anion with seven resonance forms of equal energy can be drawn. Given this fact, explain why cycloheptatriene is only slightly more acidic than propene.
083055   76   1 Reply
5 years ago
Provide the structure of o-chlorotoluene.
Provide the structure of o-chlorotoluene.
Provide the structure of o-chlorotoluene.
083055   36   3 Replies
5 years ago
How many molecules of fatty acid are needed to make one molecule of a cephalin?
How many molecules of fatty acid are needed to make one molecule of a cephalin?
How many molecules of fatty acid are needed to make one molecule of a cephalin?

• 1

• 1.5

• 0

• 3

• 2
083055   53   2 Replies
5 years ago
Which of the following is the best initiator for a cationic polymerization?
Which of the following is the best initiator for a cationic polymerization?
[html]Which of the following is the best initiator for a cationic polymerization?

• BuLi

• PhOH

• (PhCO2)2

• CH
083055   67   3 Replies
5 years ago
Is radio wave dangerous for human?
Is radio wave dangerous for human?
In the electromagnetic wave, radio wave is classified as having the lowest frequency. But then, is it still dangerous to human body? If yes, then what is the effect from that? If no, what are the uses of it then?
1004   709   4 Replies
9 years ago
How do you find the mass of the product of a chemical reaction between two chemicals?
How do you find the mass of the product of a chemical reaction between two chemicals?
For example; Chemical X has a mass of 5 grams, and chemical Y has a mass of 10 grams. If the two chemicals are mixed and a complete chemical reaction takes place, what is most likely the mass of the product?
A) 5 grams.
B) 10 grams.
C) 15 grams.
D) 5
11askaggs   565   2 Replies
11 years ago
Suppose you performed a distillation of a solution containing 1-pentanol (C5H12O), 2-pentanol (C5H12
Suppose you performed a distillation of a solution containing 1-pentanol (C5H12O), 2-pentanol (C5H12
Can anyone please assist me with this question?

Suppose you performed a distillation of a solution containing 1-pentanol (C5H12O), 2-pentanol (C5H12O), 3-pentanol (C5H12O), and methyl alcohol (CH4O). All three pentanols here have the same
123456789101112   2473   2 Replies
10 years ago
Which balloon will inflate the most? Explain (in detail) why, showing all work.
Which balloon will inflate the most? Explain (in detail) why, showing all work.
Can anyone assist me with this chemistry question...  It is from lab 3 but the instructor likes to change the numbers around.  Thank you.

Suppose you ran this same reaction (using the balloon setup as seen in the video) on your o
123456789101112   996   1 Reply
10 years ago
Charles's Law Question
Charles's Law Question
Can anyone help me work this problem out?...  Thank you.

Suppose it is a hot summer day (40.0 degrees C = 104.0 degrees F), and you have left a can of hairspray outside so the gas within it is now at the same temperature of its surrou
123456789101112   1052   6 Replies
10 years ago
Help with Chemistry...
Help with Chemistry...
Are there any Chemistry gurus out there that can help me solve these problems?  Thank you in advance...

1)  Consider that there is 28.53 g NaCl in a solution that has a total volume of 1,830 mL with a density of 0.9094 g/mL.
123456789101112   2986   1 Reply
10 years ago
In the carbon cycle, carbon dioxide and water are converted to glucose and oxygen by ________.
In the carbon cycle, carbon dioxide and water are converted to glucose and oxygen by ________.
In the carbon cycle, carbon dioxide and water are converted to glucose and oxygen by ________.

▸ large animals

▸ green plants

▸ insects

▸ earthworms

▸ mushrooms
123456789ABCD   68   1 Reply
2 years ago
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