1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tanya [424]
3 years ago
15

Where do scientists believe chemical evolution occurred?

Chemistry
2 answers:
NeX [460]3 years ago
8 0
Hello there!

They believe that the chemical evolution occurred around 3.5 billion years ago.

They also believe that the chemical occurred in the ocean

As always, it is my pleasure to help students like you!

galben [10]3 years ago
8 0
In the ocean or in deep caves.
Probably in tidal pools.
You might be interested in
decide how to supersets these substances? If if is not possible, please write "cannot be separated" on the space provided​
abruzzese [7]

Answer: (although the question does not sate whether if you separate them physically or through energy. so i did both)

1. can be separated (When high-energy ultraviolet rays strike ordinary oxygen molecules (O2), they split the molecule into two single oxygen atoms, known as atomic oxygen)

2. can be separated, but through electrolysis, fiscally moving a crane to generate electricity to separate the molecules

3. Most solid particles, composed of diamagnetic or weak paramagnetic materials, cannot be extracted by a conventional magnetic separator. physically cannot be separated. but through heat yes

4. but there is a catch: doing so requires energy. ... If energy from coal were applied to drive the decomposition reaction, more CO2 would be released than consumed, because no process is perfectly efficient. so it cant be separated physically

5. it can be separated but it needs energy physically cannot be separated.

Explanation:

4 0
2 years ago
When I googled how to balance this chemical equation K2CrO4+NaHSO3+H2O=NaHSO4+KOH+Cr(OH)3 they gave me the balanced form of 2K2C
galina1969 [7]
Whatever is on one side of the equation needs to be the same as the other. So K2CrO4+NaHSO3+H2O=NaHSO4+KOH+Cr(OH)3 you need to balance the equation between the = to make a balanced equation.
3 0
3 years ago
It is possible to prepare ethanol by nucleophilic substitution. For an electrophile, you could choose EtCl, EtBr, or EtI; for a
tensa zangetsu [6.8K]

Answer:

The reactant/reagent that would be most atom economical is EtI (Ethy Iodide) and KOH (potassium oxide) as base

This is because the iodo group are weak base hence they have a good leaving character (i.e they are unstable on their own ) which would increase the rate of reaction and the strong base KOH give the most atom economical  

Explanation:

4 0
3 years ago
Question # 4 & 5. help CHEMISTRY
laila [671]
1. A thermodynamic quantity that is the difference between the internal energy of a system and the product of itsabsolute temperature and entropy; the capacity of a system to do work, as in an exothermic chemical reaction.<span>2. </span>A thermodynamic quantity that is the difference between the enthalpy and the product of the absolute temperatureand entropy of a system. Also called <span>Gibbs free energy</span>. 
4 0
3 years ago
Please help me i’m in need!
makkiz [27]

Answer:

balanced............

3 0
2 years ago
Other questions:
  • HURRY ⚠️<br> How many Chlorine atoms in 2HCI?<br> Hiw many Hydrogen atoms are in 2HCl?
    12·2 answers
  • A chemist finds that when platinum is added to a reaction, the reaction speeds up. He thinks the platinum may be acting as a cat
    6·2 answers
  • Elements with atomic numbers above 95 are called what elements
    11·1 answer
  • A hydrocarbon contains 92.3 grams of carbon and the rest is hydrogen. Calculate its empirical formula and molecular formula. (Mr
    15·1 answer
  • What is the correct name for the compound CoCl3?
    11·2 answers
  • If a gas in the above system has a volume of V at a pressure of P, what is the volume of the same gas at a pressure of 4p
    6·1 answer
  • Calculate the pH after 0.16 mole of NaOH is added to 1.06 L of a solution that is 0.48 M HF and 1.12 M NaF, and calculate the pH
    9·1 answer
  • Hi people senko-San is best wifu change my mind
    7·2 answers
  • How does lemon juice stop an apple from turning brown?
    5·1 answer
  • Which of the following IS a part of the Kinetic Molecular Theory (KMT)?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!