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
LUCKY_DIMON [66]
3 years ago
7

How many anions are in 0.500 g of MgBr2

Chemistry
1 answer:
Oksana_A [137]3 years ago
4 0

<u>Given:</u>

Mass of MgBr2 = 0.500 g

<u>To determine:</u>

Number of anions in 0.500 g MgBr2

<u>Explanation:</u>

Molar mass of MgBr2 = 24 + 2 (80) = 184 g/mol

Moles of MgBr2 = 0.500 g/184 g.mol-1 = 0.00271 moles

Based on stoichiometry-

1 mole of MgBr2 has 1 mole of Mg2+ cations and 2 moles of Br- anions

Therefore, 0.00271 moles of MgBr2 will have: 2 * 0.00271 = 0.00542 moles of Br-

Now,

1 mole of Br- contains 6.023 * 10²³ anions

0.00542 moles of Br- contain: 0.00542 * 6.023*10²³ = 3.264*10²¹ anions

Ans: There are 3.264*10²¹ anions in 0.5 g of MgBr2


You might be interested in
The different molecules that make up the air in a room have on average the same kinetic energy. How does the speed of the differ
kap26 [50]
The formula for kinetic energy is KE=1/2(mv²).  Since both mass and velocity are multiplied by each other, particle with a larger mass needs to be moving slower than a particle with less mass if both have the same kinetic energy. You can think of it as 2KE/m=v² or 2KE/v²=m, If you increase the mass the velocity needs to decrease to keep the same KE value.

I hope this helps.  Let me know in the comments if anything is unclear.
7 0
3 years ago
What are 2 examples of stress the science meaning
Gelneren [198K]
1.An emotional strain and 2. a reaction to a complex emotional state.
4 0
3 years ago
Melting can be best described as a process in which molecules
Savatey [412]
Gain enough kinetic energy to get past each other. Ad you heat up a substance, the temperature increases as does the kinetic energy of the particles. At a point the temperature of the substance will stop increasing. The energy is now being used to increase the potential and move the particles further apart.
5 0
3 years ago
Read 2 more answers
What prediction can i make about malaria
Sunny_sXe [5.5K]

Answer:

A disease caused by a plasmodium parasite, transmitted by the bite of infected mosquitoes.

The severity of malaria varies based on the species of plasmodium.

Symptoms are chills, fever, and sweating, usually occurring a few weeks after being bitten.

People traveling to areas where malaria is common typically take protective drugs before, during, and after their trip. Treatment includes antimalarial drugs.

Explanation:

4 0
3 years ago
Which equation expresses Newtons second law of motion
const2013 [10]
F = MA 
force = mass times accleration
3 0
3 years ago
Read 2 more answers
Other questions:
  • The question is what does it regulate. PLEASE HELP. 1 sentence for each will help
    9·2 answers
  • Copper(I) ions in aqueous solution react with NH 3 ( aq ) according to Cu + ( aq ) + 2 NH 3 ( aq ) ⟶ Cu ( NH 3 ) + 2 ( aq ) K f
    6·1 answer
  • A tank at is filled with of dinitrogen difluoride gas and of chlorine pentafluoride gas. You can assume both gases behave as ide
    6·1 answer
  • Chem help<br>calculate the wavelength of an electromagnetic wave with a frequency of (in pic)​
    11·1 answer
  • On a balance, you have beakers of AgNO3AgNO3 solution and NaClNaCl solution. When mixed, they will form AgCl(s)AgCl(s). What wil
    12·1 answer
  • What type of molecular model is most accurate to the shape of a molecule?
    13·1 answer
  • A single atom of calcium could combine with a single atom of fluorine, creating electron energy stability for both atoms. True F
    13·1 answer
  • Which organic compound has 4 carbon atoms with at least one triple bond?
    13·1 answer
  • A cheetah has been clocked at 112 km/h over a 100-m distance. What is this speed in m/s?
    15·1 answer
  • How many electrons does the nickel ion contain in the compound NiS?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!