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
Jet001 [13]
3 years ago
12

How many oxygen atoms are in 8.20 g Na 2SO 4?

Chemistry
1 answer:
dusya [7]3 years ago
3 0

Answer:

No. of atom =

no.of moles x avagardro's number xatomicity

= weight /molar mass x No x atomicity

=8.2/142 x6.02x10^23 x 4

=0.346 x 10^23(approximately)

You might be interested in
How does scientific method help scientists
Irina18 [472]

Scientists use the scientific method all the time to help them understand things about certain topics. The scientific method is a list of steps that are used before, during, and after the experiment. The scientific method can help prove hypothesis about things and can tell you the outcome of the experiment.

6 0
3 years ago
How do sediments form?
Valentin [98]
Sedimentary<span> rocks are formed when </span>sediment<span> is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension</span>
6 0
3 years ago
Read 2 more answers
Please answer he questions
Nastasia [14]

"Work done by a constant force on an object is the product of the force and the distance moved by the object in the direction of the force" -textbook

There is work done ONLY if the direction of the force and the direction the item is moving are the same. In figure A, the direction of the force (the lifting) is upwards (defying gravity), and the book is moving upwards, so work is done. In figure B, the force is still moving upwards (the person is carrying the books) but the book is moving to the right, so there is NO work done.

6 0
2 years ago
Complete the three words. The oxidation state tells you how many electrons an atom has g....................... , l.............
fgiga [73]

Answer:Gained, Lost , Shared

Explanation:

The oxidation state tells you how many electrons an atom has GAINED.................. , LOST....................... , or SHARED........................ , in forming a compound.

Oxidation state is defined as the  the total number of electrons that an atom gains or loses when forming a chemical bond with another atom.

----To form an ionic bond for example in NaCl, Na, with 11 electrons and one valence electron in its outermost shell donates or lose that valence electron to Chlorine  with 17 electron and 7 in its outermost shell. Therefore Sodium, Na acquires the +1 oxidaton state to become stable and Chlorine acquires the -1 oxidation state  to become stable  forming the  NaCl compound.

To form a covalent compound, There must be sharing of electrons between atoms.For example, in PCl3,  The  phosphorous atom with atomic number 15 shares its three unpaired electrons with the single valence electrons of three chlorine atoms. making the four molecules to attain stability with  Phosphorous having +3 and the chlorine atoms having -1 oxidation states

8 0
3 years ago
How many significant figures are in the measurement 40, 500 mg? a) two b) three c) four d) five
emmainna [20.7K]
I believe there are 3 significant figures B.
8 0
2 years ago
Other questions:
  • Question 4 (5 points)<br> Which parasite can live in refrigerated conditions?
    13·1 answer
  • Which statement applies to the energy change illustrated in the quantized energy emission diagram
    11·1 answer
  • WILL GIVE BRAINLIEST! URGENT!
    15·1 answer
  • How is sodium extracted from is ore?
    9·1 answer
  • What is the volume of liquid in this graduated cylinder? Be sure your answer has a reasonable number of decimal places.
    9·1 answer
  • Test questions Accidently did this
    15·2 answers
  • What do the elements within a "period" have in common? (pick one)
    7·2 answers
  • Describe three findings of the Human Genome Project<br> Write it in your own words
    12·1 answer
  • How many electrons are lost or gained in forming each ion? a. Ba2+ b. As3- c. Cu2+
    14·2 answers
  • A gas occupies 3.8 L at -18° C and 975. torr. What volume would this gas occupy at STP?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!