A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

When I have something like: Al(OH)3 would I set it up like this: 26.982(15.999+1.008)*3?

  • This Question is Open
  1. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    what are you trying to do?

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    mole to grams conversions the question is: How many moles are in 98.3 grams of aluminum hydroxide, Al(OH)3

  3. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    ah

  4. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    how many moles of \(\sf Al(OH)_3 \) do you have?

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thats the question; it only gave grams for me to find that.

  6. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    you only have one mole

  7. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    if you do not see a number before the name of the compound or molecule then it means there is only one mole.

  8. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    \(\sf \huge x~ mole_{Al(OH)_3} \times \frac{grams_{Al(OH)_3}}{1 ~ mole_{Al(OH)_3}} = \)

  9. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    do you see how the mole unit for a particular thing is canceled out algebraically?

  10. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    \(\large a \times \huge \frac{b}{a} = b\)

  11. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah I see where it would be cancelled out. I just need to know how to find the molecular weight of the aluminum hydroxide.

  12. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    whatever unit you're trying to convert out of, you need to divide by itself

  13. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    molecular weight follows the conservation of mass so if you see Al it means there is 1 Al in there if you see \(\sf (OH)_3\) it means that there are 3 O's and 3 H's; the subscripts tell you how many there are for whatever each element that is enclosed in parenthesis

  14. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    usually when there's 1, we do not write it out. it is just like saying a mole of something - it is implicit that the word "a" denotes 1

  15. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    you're going to add all the weights of each elements in that molecule/compound

  16. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    \(\sf \large Al(OH)_3 = [1 \times (weight_{Al})] + [3 \times (weight_{O}+weight_{H})] \)

  17. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    get it?

  18. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so the answer is 78.003 correct?

  19. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    I don't know the individual atomic mass units of each elements, that is something you need to reference to a periodic table.

  20. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    its in the top

  21. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    then start adding and multiplying

  22. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay well thank you so much for you're help!!

  23. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @hwyl what about when it says: Ca3(PO3)2

  24. hwyl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 5

    Ca: \(3 \times \sf Ca \) P: \(2 \times \sf P \) O: \(2 \times 3 \sf ~ O \)

  25. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.