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
zubka84 [21]
2 years ago
15

(Science)

Chemistry
1 answer:
AlladinOne [14]2 years ago
8 0

Answer:

A

Explanation:

eons are divided into eras and eras are based on major events and can vary in time so eons can vary in time

You might be interested in
how many moles of potassium dichromate (k2cr2o7) are required to prepare a 250-ml solution of with a concentration of 2.16 m?
Eva8 [605]

The moles of potassium dichromate , K₂Cr₂O₇ are required to prepare a 250 mL solution of with a concentration of 2.16 M  is 0.54 mol.

given that :

molarity = 2.16 M

volume = 250 mL = 0.25 L

the molarity is given as :

molarity = number of moles / volumes in L

from this we can calculate the number of moles, we get :

number of moles of K₂Cr₂O₇ = molarity × volume

number of moles of K₂Cr₂O₇ = 2.16 × 0.25

number of moles of K₂Cr₂O₇ = 0.54 mol

Thus, The moles of potassium dichromate , K₂Cr₂O₇ are required to prepare a 250 mL solution of with a concentration of 2.16 M  is 0.54 mol.

To learn more about moles here

brainly.com/question/15209553

#SPJ4

4 0
1 year ago
What is the mole ratio of aluminum to chlorine in the compound aluminum
creativ13 [48]
1:3
The ratio of Al3+ ions to Cl− ions in the chemical formula is 1:3.
I’m sorry if this didn’t help I’m new to Brainly
6 0
3 years ago
HURRYYY!!!!!!!!!!
vlabodo [156]

Im not sure but i think its 350. I really hope im right

8 0
3 years ago
When an electron in a quantum system drops from a higher energy level to a lower one, the system __
icang [17]

When an electron in a quantum system drops from a higher energy level to a lower one, the system<u> emit a photon.</u>

<u />

The energy of the electron drops when it transitions levels, as well as the atom releases photons. The emission of the photon occurs as the electron transitions from an energy state to a lower state. The photon energy represents precisely the energy that would be lost when an electron moves to a level with less energy.

When such an excited electron transitions from one energy level to another, this could emit a photon. The energy drop would be equivalent to the power of the photon that is released. In electron volts, the energy of an electron, as well as its associated photon (emitted or absorbed) has been stated.

Therefore, when an electron in a quantum system drops from a higher energy level to a lower one, the system<u> emit a photon.</u>

<u />

To know more about electron

brainly.com/question/1255220

#SPJ4

<u />

4 0
1 year ago
Which of the following properties of water is due primarily to the uneven distribution of charge between the hydrogen and oxygen
Blizzard [7]
<span>ability to dissolve ionic substances is the answer</span>
4 0
3 years ago
Other questions:
  • When Kay added 30 g of hydrochloric acid (HCl) to 65 g of Zn, bubbles appeared and a white precipitate, zinc chloride (ZnCl2) wa
    13·2 answers
  • The relative ionic or covalent character of chemical bonds may be estimated by: (Select all that apply.)
    6·2 answers
  • Matter that has a definite shape and value
    6·1 answer
  • Calculate the number of moles of 2 g hydrogen gas
    8·1 answer
  • Hello, if any of y'all don't mind, can one of you answer these 5 questions. ​
    9·2 answers
  • PLEASE HELP !! ILL GIVE BRAINLIEST !! 100 POINTS IF YOUR GOOD AT CHEMISTRY AND BIOLOGY .
    10·2 answers
  • What is the relationship between atomic size and bond length for H2O / H2S and CO2 / CS2?
    13·1 answer
  • The theory of plate tectonics was, at first, rejected by most scientists. Now most geologists accept that tectonic plates exist
    14·2 answers
  • Find the element, mass number, atomic number, and number of protons from the following information.
    5·1 answer
  • An electron on an energy level has an energy of 16.32 x 10−19 J. It moves to another level by absorbing 5.4 x 10−19 J of energy.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!