# Answer in General Chemistry for Willy #155722

In the production of Zinc sulfide, 36.8 g of zinc is made to react with 19.4 g of sulfur.

+ →

a. How many moles of ZnS is produced when sulfur is completely used up?

b. How many grams of ZnS is produced when zinc is completely used up?

c. Which reactant is the limiting reagent?

d. How many grams of the excess reagent is left?

Take a look at the balanced chemical reaction for this

8Zn + S8 “to” 8ZnS

Noticed that you have 8:1  between zinc and sulfur. This tells you that will always consume eight moles of zinc for every one mole of sulfur that takes part in the reaction.

Moreover, you have a 8:8 mole ratio between zinc and zinc sulfide, the product of the reaction. This tells you that the reaction will produce as many moles of zinc sulfide as you have moles of zinc that take part in the reaction.

Your strategy here will be to use the molar masses of the three chemical species that take part in the reaction to go from grams to moles for the reactants, and from moles to Grams for the product.

For zinc, you’ll have

36.8g × “frac{1molZn}{65.38g}” = 0.562 moles Zn

For sulfur, you’ll have

19.4g × “frac{1molS_8}{256.52g}” = 0.0756 moles S8

Now, you need to use  ratio that exists between the two reactants to determine whether or not you have enough moles of zinc to react with that much moles of sulfur.

0.0756 moles S8 × “frac{8molesZn}{1moleS_8}” = 0.6048 moles Zn

Since you have fewer moles of zinc than the complete consumption of the sulfur would have required, you can say that zinc will act a a .

More specifically, only

0.562 g Zn × “frac{1molesS_8}{8moleZn}” = 0.07025 moles S8

will actually take part in the reaction, the rest will be in excess.

Now, if zinc is completely consumed by the reaction, it follows that you will end up with

0.562molesZn ×“frac{8molesZnS}{8molesZn}” = 0.562 moles ZnS

Finally, use zinc sulfide’s molar mass to determine how many grams would contain this many moles

0.562molesZnS × “frac{97.445g}{1molZnS}” = 54.76g

Zinc is the . The reaction produces 54.76 g of zinc sulfide.

Excess reagent = 36.8 + 19.4 – 54.76

= 56.2 – 54.76 = 1.44g

Calculate the price
Pages (550 words)
\$0.00
*Price with a welcome 15% discount applied.
Pro tip: If you want to save more money and pay the lowest price, you need to set a more extended deadline.
We know how difficult it is to be a student these days. That's why our prices are one of the most affordable on the market, and there are no hidden fees.

Instead, we offer bonuses, discounts, and free services to make your experience outstanding.
How it works
Receive a 100% original paper that will pass Turnitin from a top essay writing service
step 1
Fill out the order form and provide paper details. You can even attach screenshots or add additional instructions later. If something is not clear or missing, the writer will contact you for clarification.
Pro service tips
How to get the most out of your experience with TheBestPaperWriters
One writer throughout the entire course
If you like the writer, you can hire them again. Just copy & paste their ID on the order form ("Preferred Writer's ID" field). This way, your vocabulary will be uniform, and the writer will be aware of your needs.
The same paper from different writers
You can order essay or any other work from two different writers to choose the best one or give another version to a friend. This can be done through the add-on "Same paper from another writer."
Copy of sources used by the writer
Our college essay writers work with ScienceDirect and other databases. They can send you articles or materials used in PDF or through screenshots. Just tick the "Copy of sources" field on the order form.
Testimonials
See why 20k+ students have chosen us as their sole writing assistance provider
Check out the latest reviews and opinions submitted by real customers worldwide and make an informed decision.
Anthropology
excellent loved the services
Customer 452443, September 23rd, 2022
Thank you!
Customer 452451, November 27th, 2022
Job well done. Finish paper faster than expected. Thank you!
Customer 452451, October 3rd, 2022
Theology
Job well done and completed in a timely fashioned!
Customer 452451, November 18th, 2022
English 101
Very good job. I actually got an A
Customer 452443, September 25th, 2022
Architecture, Building and Planning
The assignment was well written and the paper was delivered on time. I really enjoyed your services.
Customer 452441, September 23rd, 2022
Excellent service - thank you!
Customer 452469, February 20th, 2023
Psychology
Thanks a lot the paper was excellent
Customer 452453, October 26th, 2022
Anthropology
Excellent services will definitely come back
Customer 452441, September 23rd, 2022
Nursing
The paper was EXCELLENT. Thank you
Customer 452449, September 23rd, 2022
11,595
Customer reviews in total
96%
Current satisfaction rate
3 pages
Average paper length
37%
Customers referred by a friend