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
Ivahew [28]
4 years ago
12

2. Mercury (II) oxide decomposes into mercury and oxygen gas according to the following

Biology
1 answer:
bija089 [108]4 years ago
7 0

Answer:

7.8 moles are needed.

Explanation:

Given data:

Mass of oxygen produced = 125 g

Number of moles of mercury oxide needed = ?

Solution:

Chemical equation;

2HgO → 2Hg + O₂

Number of moles of oxygen:

Number of moles = mass/ molar mass

Number of moles = 125 g/ 32 g/mol

Number of moles = 3.9 mol

Now we will compare the moles of oxygen with mercury oxide.

                       O₂         :         HgO

                        1           :             2

                     3.9          :              2×3.9 = 7.8 mol

You might be interested in
an organism was hunted almost to Extinction but the population bounced back which evaluationary changed did the species most lik
Marina CMI [18]

The correct answer is the Bottleneck Effect.

Bottleneck Effect is defined as a sharp reduction in the size of a population due to environmental events or human activities.

8 0
3 years ago
Read 2 more answers
Mrs. ironfield is brought to the emergency room complaining of severe pain in her left illiac region. she claims previous episod
slava [35]
Diverticula Are Tiny Herniations Of The Mucosa Through The Colon Walls, A Condition Named Diverticulosis. They Are Believed To Form When The Diet Lacks Bulk And The Volume Of Residue In The Colon Is Small. The Colon Narrows Contractions Of Its Circular Muscles And They Become More Potent, Increasing The Pressure On Its Walls. Diverticulitis Is A Condition In Which The Diverticula Become Inflamed. Mrs. Ironfield Has Diverticulitis Due To The Inflammation Of Her Diverticula, As Shown By The Pain And Mass.
5 0
4 years ago
Which is the smallest unit of life? Organs, Molecules, Cells, Atoms
riadik2000 [5.3K]
Cells are the smallest unit of life
6 0
3 years ago
Read 2 more answers
What is the first line of defense against a germ attack in the human body?
Strike441 [17]
Anti-bodies are produced to fight the bactirea
8 0
3 years ago
What is the source of the genetic information that determines the traits of a Pacific tree frog?
Tema [17]
The answer to the question above is letter D. <span>Chromosomes found in the cell nucleus.</span>
In the cell nucleus, DNA is tightly packed into the thread-like structure known as chromosomes. Every chromosome is made up of tightly coiled DNA around proteins (histones) that support its structure. Chromosomes are not visible when there is no cell division. It cannot be seen in the cell’s nucleus nor under the finest microscope. They are only visible when the cell is dividing and is apparently visible under a microscope.


5 0
3 years ago
Other questions:
  • BEST ANSWER GET BRAINLIEST!!
    11·2 answers
  • What species is best adapted to living In cold temperatures a species a b species b c species c d species d
    6·1 answer
  • Which term refers to the collective interactions of humans with the environment and the short-term and long-term health conseque
    8·1 answer
  • What is the combined alleles of all individuals in a population
    15·1 answer
  • PLEASE HELP, PROGRESS REPORTS ARE COMING. when examining cells with a microscope, you can see the outlines of plant cells easily
    9·1 answer
  • A contraction of the smooth muscle in the walls of the bronchi and bronchioles that tighten and squeeze the airway shut is known
    12·1 answer
  • The active site of an enzyme is _____________. Group of answer choices the region of an enzyme that attaches to the product the
    7·1 answer
  • Which of the following is not true about DNA replication?
    14·1 answer
  • 13. What is formed when two or more organs work together to carry out a specific function? (1 point)
    13·2 answers
  • Weather and natural disasters act independently of a population's density. These factors are called density ____________________
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!