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ohaa [14]
3 years ago
8

Which would increase the amount of dissolved oxygen in a pond

Chemistry
1 answer:
AlexFokin [52]3 years ago
6 0

Answer:

Dissolved oxygen levels are increased by supplementing wind and wave action, adding plants to water and exposing water to purified oxygen. Also removing fish could increase the amount of dissolved oxygen

Explanation:

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The chemical equation below shows the reaction between carbon dioxide (CO2) and lithium hydroxide (LiOH). CO2 + 2LiOH mc011-1.jp
Sunny_sXe [5.5K]
From the given balanced chemical equation,
                            CO2 + 2LiOH --> Li2CO3 + H2O
we can conclude that for every 2 moles of LiOH, we need a mole of CO2. Calculate first the number of moles of CO2 by dividing the given mass by the molar mass giving us an answer of 0.58 moles. Using proportionality,
                             0.58 / x = 1 / 2
The value of x is equal to 1.16 moles. 
5 0
3 years ago
Read 2 more answers
select the common word on the outside of a shipping container that will alert you to the fact that the material inside is hazard
Paha777 [63]

The common word on the outside of a shipping container that will alert you to the fact that the material inside is hazardous is caution.

<h3>What are hazardous statements?</h3>

Hazardous statements are those words or phrases that are labelled against chemicals which shows the degree of how dangerous the chemical are.

The common words that are used as hazardous statements which shows that a chemical is dangerous include the following:

  • Danger,

  • Caution and

  • Warning.

Therefore, the common word on the outside of a shipping container that will alert you to the fact that the material inside is hazardous is caution.

Learn more about hazard statements here:

brainly.com/question/2875871

#SPJ1

3 0
2 years ago
A solution of methanol and water has a mole fraction of water of 0.312 and a total vapor pressure of 211 torr at 39.9 ºC. The va
r-ruslan [8.4K]

Answer:

The solution is not ideal.

The relative strengths of the solute-solvent interactions are greater  compared to the solute-solute and solvent-solvent interactions

Explanation:

The total vapor pressure is the sum of the partial pressures of  water and methanol, and they are calculated by the Raoult´s law equation:

Pₐ = Xₐ Pºₐ, where  Pₐ is the partial pressure of component A

                              Xₐ is the molar fraction of A

                              P⁰ₐ is the pressure of pure A

So lets calculate the partial pressures of methanol and water and compare them with the given total vapor pressure of solution:

X H2O = 0.312 ⇒ X CH3OH = 1 - 0.312 = 0.688

PH2O = 0.312 x 55.3 torr =  17.3 torr

PCH3OH = 0.688 x 256 torr = 176.1 torr

Ptotal = PH2O  + PCH3OH  = 17.3 torr + 176.1 torr = 193.4 torr

This pressure is less than the experimental value of 211 torr. So the solution is not ideal. The relative strength of the solute-solvent interactions are greater than the solute-solute and solvent-solvent interactions.

The reason for this is the presence of hydrogen bonding between methanol and water.

6 0
4 years ago
Please help me name this alkane
Mrac [35]
I assume you are already familiar with the IUPAC rules.  I will be referring to the rule number where applicable.  If you do not have a copy of the IUPAC rules, please let me know by a comment or PM.

Alkane (A)
The first one is tricky, because the longest straight chain is not as drawn, but along a "branch".  See first image.
Since there are 10 carbon atoms in the longest chain, the parent chain will be named decane.
The first substituent occurs in C3, that explains why the parent chain is named from right to left.
Now the substituents:
C3 :  Cl and CH3, so 3-chloro  3-methyl
C6 :  The Y-shape is named isopropyl, so 6-isopropyl
C7 :  Substituent is a straight chain with 2 carbon atoms, so 7-ethyl
The complete name is therefore
3-chloro-7-ethyl-3-methyl-6-isopropyl-decane
Note that order is according to alphabetic order of the substituent name without the prefixes (explains why isopropyl comes after methyl)

Alkane (B)
Again, first step is to look for the longest chain, which is 11 (undecane), as numbered in image 2.
Numbering starts from the 2,2-dichloro end because it gives the lowest number for the locant.
C2 2,2-dichloro  (2 branches, each is Cl)
C4 4-methyl  (1 carbon atom)C5 5-ethyl   (2 carbon atoms)
C8 8-ethyl    
C9 9-methyl
So the complete name is 
2-2-dichloro-5,8-diethyl-4,9-dimethyl-undecane

Alkane (C)
Here there are 9 carbon atoms (nonane) in the longest chain.
The locants of substituents are identical from either end.  Here I choose the one with the smaller number of the first substitutent 2-methyl instead of 2,2-dimethyl, resulting the numbering starting from the right.  I hope I am right here.
C2 1-methyl
C3 1-methyl
C4 1-methyl
C5 1-methyl
C6 6-fluro-6-iodo
C7 1-methyl
C8 8,8-dimethyl
So the complete name becomes
6-fluoro-6-iodo-2,3,4,5,7,8,8-heptamethyl nonane

To @study77 and anyone reading this answer:
Please check and understand everything I did in case I slipped somewhere.  Any suggestion for improvement or corrections will be most appreciated.

8 0
3 years ago
(100 POINTS) WILL MARK BRAINLIEST
frosja888 [35]

Answer:

the first option is the correct answer

7 0
2 years ago
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