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
dimulka [17.4K]
3 years ago
14

The earth formed 4600 million years ago. What percentage of the Earth’s age has the atmosphere been its current composition

Chemistry
1 answer:
nata0808 [166]3 years ago
4 0

Answer: 4.35%

Explanation:

Scientists estimate that the current composition of gases in the Earth's atmosphere has been stable for the last 200 million years or so.

If the Earth was formed 4,600 million years ago then the percentage of her age that the atmosphere has been in its composition is:

= 200 / 4,600 * 100%

= 4.35%

You might be interested in
Which of the following type of radiation is represented by 0 over negative 1 e? A.alpha emission B.beta emission C.positron emis
Zolol [24]
The answer is B. beta emission. Alpha emission is a particle with 2 protons and 2 neutrons. Positron emission is represented by 0 over positive 1 e. Gamma rays is 0 over 0 γ.
7 0
3 years ago
Determine the potential deaths resulting from the following exposure to chlorine:
jekas [21]

Answer:

For each scenario as following:

A. 3 Potential deaths by chlorine exposure

B. 1 Potential deaths by chlorine exposure

C. 3 Potential deaths by chlorine exposure

Explanation:

According to Freitag, 1941 Chlorine exposure can be lethal at the concentration of 34-51 ppm in a time of 1h-1.5h. The answers are based on his reference.

6 0
3 years ago
How many grams of Br are in 335g of CaBr2
ASHA 777 [7]
The answer is 267.93 g

Molar mass of CaBr2 is the sum of atomic masses of Ca and Br:
Mr(CaBr2) = Ar(Ca) + 2Ar(Br)
Ar(Ca) = 40 g/mol
Ar(Br) = 79.9 g/mol
Mr(CaBr2) = 40 + 2 * 79.9 = 199.8 g/mol

The percentage of Br in CaBr2 is:
2Ar(Br) / Mr(CaBr2) * 100 = 2 * 79.9 / 199.8 * 100 = 79.98%

Now make a proportion:
x g in 79.98%
335 g in 100%
x : 79.98% = 335 g : 100%
x = 79.98% * 335 g : 100%
x = 267.93 g
7 0
3 years ago
In what order did mendeleev arrange the elements in his periodic table?
irina1246 [14]
He realized that the physical and chemical properties of elements<span> were related to their atomic mass in a '</span>periodic<span>' way, and </span>arranged<span> them so that groups of </span>elements<span> with similar properties fell into vertical columns in </span>his table<span>.
</span><span>
</span>
3 0
3 years ago
Xbox or ps4? haha have a. Good ond
bekas [8.4K]

Answer:

I play none but If I did I would choose Xbox

btw, thank you

7 0
3 years ago
Other questions:
  • HELP I AM IN AN EXAM AND I NEED HELP PLEASE I WILL MAKE BRAINLIEST!!!The picture shows two different species of mammals that use
    6·2 answers
  • The ___________ energy in a mechanical system is determined by adding the potential and kinetic energy together
    7·2 answers
  • Which conclusion could be made from Ernest Rutherford's gold foil experiment?
    13·2 answers
  • List three limitations of human space travel
    7·2 answers
  • Predict the solubility of the following substances in water and place them in the appropriate bins
    10·1 answer
  • Which form of energy is increasing as a car drives up a hill?
    8·1 answer
  • If the male monster has a genotype of Yy, will his ears be pointy or round?
    6·1 answer
  • Pls help me. Show proof on why it’s that answer.
    9·1 answer
  • According to the principle of conservation of momentum,
    9·1 answer
  • 15. If the moon is 384,400km away. Does it take more than a second for light to travel from the Earth to the moon?​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!