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
inysia [295]
1 year ago
15

How many molecules of H₂S are required to form 79.0 g of sulfur according to the following reaction? Assume excess SO2.

Chemistry
1 answer:
Serhud [2]1 year ago
4 0

Answer:

9.89 x 10²³ molecules H₂S

Explanation:

To find the molecules of H₂S, you need to (1) convert grams S to moles S (via the atomic mass of sulfur), then (2) convert moles S to moles H₂S (via the mole-to-mole ratio from equation coefficients), and then (3) convert moles H₂S to molecules H₂S (via Avogadro's Number). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs to match the sig figs of the given value.

Atomic Mass (S): 32.065 g/mol

2 H₂S(s) + SO₂(g) -----> 3 S(s) + 2 H₂O(l)

Avogadro's Number:

6.022 x 10²³ molecules = 1 mole

79.0 g S           1 mole            2 moles H₂S          6.022 x 10²³ molecules
---------------  x  ---------------  x  ----------------------  x  -------------------------------------  =
                        32.065 g            3 moles S                          1 mole

=  9.89 x 10²³ molecules H₂S

You might be interested in
HELP ASAP!!! #2 only please.
shtirl [24]

Answer:

friend me on here and imma send you the link Explanation:

6 0
2 years ago
Read 2 more answers
The Percentage of salt-water vs. fresh-water:???%
I am Lyosha [343]

Answer:

<em><u>Over 96 percent is saline. Of total freshwater, over 68 percent is locked up in ice and glaciers. Another 30 percent of freshwater is in the ground.</u></em>

6 0
2 years ago
If the half-life of a radioisotope is 10,000 years, the amount remaining after 20,000 years is
Cloud [144]

Answer:

Considering the half-life of 10,000 years, after 20,000 years we will have a fourth of the remaining amount.

Explanation:

The half-time is the time a radioisotope takes to decay and lose half of its mass. Therefore, we can make the following scheme to know the amount remaining after a period of time:

Time_________________ Amount

t=0_____________________x

t=10,000 years____________x/2

t=20,000 years___________x/4

During the first 10,000 years the radioisotope lost half of its mass. After 10,000 years more (which means 2 half-lives), the remaining amount also lost half of its mass. Therefore, after 20,000 years, the we will have a fourth of the initial amount.

6 0
3 years ago
6. An alloy of iron contains 75.0% iron and 25.0% other elements. How many grams of iron are present in 150. g of the alloy?
Hoochie [10]

Answer:

108.5

Explanation:

half of 150 is 75 and half of that is 32.5. Add that to 75 and you'll get your answer

3 0
3 years ago
Why it is important for steel to go through a fluid phase as it is being produced
BigorU [14]
T is important to go through a fluid phase as it is being produced because the object must go through heat to be melted and then it should be put into a mold to be formed. Also, it go though heat to keep it from cracking and go to be cooled and harden.

Read more on Brainly.com - brainly.com/question/1882456#readmore
3 0
3 years ago
Other questions:
  • The oxidation number of As in Na3AsO2 is
    11·1 answer
  • The freezing point of diet soda is higher than the freezing point of regular soda, but lower than 0 degrees celcius, the freezin
    6·1 answer
  • If your density was supposed to be 2.3 g/mL, but you calculated yours to be 2.1 g/mL, what is your percent error?
    8·1 answer
  • PLEASE HELP ME ASAPP!!
    5·1 answer
  • Write a food chain in which the hawk is a secondary consumer:​
    5·2 answers
  • the development and use of the ______ a common and important piece of laboratory equipment, led scientist to the discovery of se
    14·1 answer
  • 1. Hg(OH)2 + Ag →<br> what is the answer for this?
    6·1 answer
  • Two chemicals are mixed together and a gas is produced. *<br>chemical change <br>physical change ​
    10·1 answer
  • Indigestion can be cured by antacid
    6·2 answers
  • What is the mass in grams of 8.65 mol C8H18?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!