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
leonid [27]
3 years ago
12

How is it possible for scientists to do studies about things that happened?

Chemistry
1 answer:
Levart [38]3 years ago
6 0

Because they can look at the fossils that they left behind and see what kind of animal it was and what happened to it if another animal is inside of the fossil or if the bones are misplaced

You might be interested in
I WILL RATE BRAINLIEST I JUST NEED HELP!!!!
Ierofanga [76]
15:15 which cancels to 1:1 so for each mole of co2 u get a mole of carbon monoxide



brainliest and thanks plz:)))))))))))
8 0
4 years ago
Read 2 more answers
The balanced equation below shows the products that are formed when pentane (C5H12) is combusted. C5H12 + 8O2 mc029-1.jpg 10CO2
Maru [420]

Answer: The mole ratio of oxygen to pentane for the combustion of pentane is 8 : 1.

Explanation: The given reaction is a type of combustion reaction.

Combustion reaction is a reaction in which a hydrocarbon reacts with oxygen gas to produce water and carbon dioxide gas.

For the reaction of pentane with oxygen, the balanced equation would be:

C_5H_{12}+8O_2\rightarrow 5CO_2+6H_2O

In the reaction, 1 mole of C_5H_{12} reacts with 8 moles of O_2 gas.

Thus giving us the mole ratio as

Oxygen : Pentane = 8 : 1

4 0
3 years ago
Read 2 more answers
What is the daughter nucleus produced when zn63 undergoes electron capture? replace each question mark with the appropriate inte
GarryVolchara [31]

The daughter nucleus that is produced is ₂₉⁶³cu.

What is Electron capture?

The process of drawing an electron to the nucleus, where it combines with a proton to create a neutron and a neutrino particle, is known as electron capture.

The daughter nucleus is the nucleus that is made by the parent nucleus. The nucleus that remains after the decay is called the daughter nucleus.

Here is the chemical formula for the reaction that results in the electron capture of the zinc-63 nucleus:

_A^ZX + e^- =  _A^Z_-_1 Y + ye

_3_0^6^3Zn\; + e^- = _2_9^6^3Cu + ye

Thus, the daughter nucleus produced when zn63 undergoes electron capture is _2_9^6^3Cu.

To learn more about Electron capture, refer to the below link:

brainly.com/question/10964824

#SPJ4

4 0
2 years ago
Please solve quickly
slavikrds [6]

Answer:

Explanation:

mass of one virus = 9.0 x 10⁻¹² mg

mass of one mole = 6.02 x 10²³ x mass of one virus

= 6.02 x 10²³ x 9.0 x 10⁻¹²

= 54.18 x 10¹¹ mg

= 54 x 10⁸ g .

= 54 x 10⁵ kg .

b )

let n be no of moles of virus that will be equal to weight of oil tanker

n x 54 x 10⁵ = 3 x 10⁷

n = 5.5555  

rounding off to 2 significant figure

5.6 moles Ans .

6 0
4 years ago
Convert to grams<br> 0.100 moles of Co2
omeli [17]
One mole of C= 12 grams
two moles of O =32
so one mole of CO^2 is44 grams
.1 moles or 1/10 moles of 44 grams is 4.4 grams
3 0
3 years ago
Other questions:
  • In an oxidation-reduction reaction, what happens to the electrons in the reduction process?
    9·1 answer
  • a chemical formula shows the kind and number of Atoms that form a what? compound, mixture, solution, or suspension
    9·1 answer
  • What color are the universal indicators for: HCl, Na3CO3, NaOH, H20
    15·1 answer
  • Please help!! Which process occurs during all chemical reactions?
    10·1 answer
  • Which of the following best describes the motion of the particles in a piece of steel?
    5·1 answer
  • How can two atoms have the same mass but different charges?
    13·1 answer
  • Explain heat transfer in your own words​
    8·1 answer
  • Plz help me well mark brainliest if you are correct!
    14·1 answer
  • If Maria winks exactly 5 times every minute while she is awake and she sleeps exactly 8 hours a day, how many times does Maria w
    10·1 answer
  • Write a message to Eric Wu explaining when he can photograph a lunar eclipse and why lunar eclipses happen.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!