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
agasfer [191]
2 years ago
8

Please help make sure its correct thanks

Chemistry
1 answer:
Wewaii [24]2 years ago
5 0

The empirical formula of metal iodide : CoI₃(Cobalt(III) Iodide)

<h3>Further explanation</h3>

13.02 g sample of Cobalt , then mol Co(MW=58.933 g/mol) :

\tt mol=\dfrac{mass}{Ar}=\\\\mol=\dfrac{13.02~g}{58.933}\\\\mol=0.221

Mass of metal iodide formed : 97.12 g, so mass of Iodine :

\tt =mass~metal~iodide-mass~Cobalt\\\\=97.12-13.02\\\\=84.1~g

Then mol iodine (MW=126.9045 g/mol) :

\tt \dfrac{84.1}{126.9045}=0.663

mol ratio of Cobalt and Iodine in the compound :

\tt 0.221\div 0.663=1\div 3

You might be interested in
What is the Factor Label Method?
Soloha48 [4]
A method of converting one unit of measurement to another, like liters to milliliters.
7 0
3 years ago
What is the difference between a molecule and a compound?!
KiRa [710]

molecules can be made of two of the same elements whereas a compound is always made of two different elements

3 0
3 years ago
Read 2 more answers
Describe the three main types of plate boundary interactions:
bulgar [2K]

Answer:

In the explanation

Explanation:

Divergent: When two plates are diverging from each other, meaning that the two plates are moving away from each other. Events that may occur include ridges or rifts.

Convergent: When two plates are moving towards each other.

If a continental plate and an oceanic plate are converging, the oceanic plate would slide underneath the continental plate since it is thinner. This would result in subduction, which means that part of the oceanic plate would hang underneath the continental plate, where magma can melt the hanging part.

If two continental plates are converging, the crash would result in mountains or volcanic activity. Magma could rise and rush from the crack. There would be a bump in these tectonic plates.

Transform: When two plates are sliding past each other. Earthquakes can occur when the plates are sliding. When an oceanic plate is involved, the movement of the plates could cause a tsunami as well. The water above the transform fault could rise, and grow bigger and bigger. The 2011 Japan Tsunami is a good example of this.

Hope this helps!

5 0
2 years ago
Screen of monitors and televisions are made by ?
kati45 [8]

Answer:

C

Explanation:

This is a correct answer i think soo

8 0
2 years ago
Read 2 more answers
Which substance has two neutrons?<br><br> A. H-2<br><br> B. He-2<br><br> C. He-3<br><br> D. He-4
Feliz [49]

Answer:

D

Explanation:

In a Helium (He) atom, the atomic structure of the atom has 2 protons, 2 electrons and 2 neutrons. For an element X to be a Helium (He) atom, it must possess 2 protons. The number of neutrons present will determine its stability either if its probably radioactive or a natural occurring inert gas.

In option 1,

We have H-2. The symbol "H" is used to denote the element hydrogen in the periodic table and hydrogen has only 1 protons and 1 neutron making its mass number 2.

Option 2,

He -2 : here in this option, we have a helium atom, but with mass number of 2 only. Judging from the formula of mass number = protons + neutrons, we already have proton as 2, hence the number of neutrons there is zero (0)

Option 3,

He - 3 : just like in option 2, the only difference here is that the mass number is 3 hence making the number of neutrons just 1.

Option 4,

He - 4 : This option met the requirements of having 2 protons and 2 neutrons making a total of 4 which corresponds to the mass number.

7 0
3 years ago
Read 2 more answers
Other questions:
  • In this experiment you will measure the stretching frequencies of different functional groups in a series of organic molecules.
    13·1 answer
  • Which of the following are most directly involved in<br> chemical bonding?
    14·1 answer
  • I know this isn't the subject of math, but nobody can answer it in math and I need help with the steps because I need to turn it
    15·1 answer
  • A sample contain 33.42g of metal pellets are poured on to a graduated cylinder initially containing 12.7ml of water, causing the
    5·1 answer
  • Some pure calcium carbonate is made to react completely with 100cm3 Hydrochloric acid of unknown concentration. 120cm3 of carbon
    7·1 answer
  • If the heat of reaction is negative, the reaction is _____. Select one:
    11·2 answers
  • Teams of scientists work together to explore space. Which achievement did not involve chemists?
    9·1 answer
  • What would happen if all the cordgrass was removed from the coast of South Carolina? pls help quickly
    9·1 answer
  • Read the excerpt from "The Speech."
    13·2 answers
  • There are TWO isotopes of chlorine. Under normal conditions, chlorine exists as diatomic molecule, Cl₂. The mass of the Cl₂ mole
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!