A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 2 years ago
4. Carotene, the pigment responsible for the color of carrots, has a percent composition of 89.49%C and 10.51%H. Its molecular mass was found to be 546.9g. Calculate its empirical formula and its molecular formula.
 2 years ago
4. Carotene, the pigment responsible for the color of carrots, has a percent composition of 89.49%C and 10.51%H. Its molecular mass was found to be 546.9g. Calculate its empirical formula and its molecular formula.

This Question is Closed

abb0t
 2 years ago
Best ResponseYou've already chosen the best response.0Assuming 100% composition you would take 0.8949g of carbon and 0.1051 g of hydrogen. You then take the molecular mass given to find moles.

Tttaammmaannnaa
 2 years ago
Best ResponseYou've already chosen the best response.0ok so Carbon has .0745 mol and hydrogen has .1043 mol. now what do i do?

Tttaammmaannnaa
 2 years ago
Best ResponseYou've already chosen the best response.0so would the units be g/mol?

abb0t
 2 years ago
Best ResponseYou've already chosen the best response.0Divide the mol given by 0.745 for both.

Tttaammmaannnaa
 2 years ago
Best ResponseYou've already chosen the best response.0so not by the molecular mass?

abb0t
 2 years ago
Best ResponseYou've already chosen the best response.0No. That's for molecular formula. Sorry.

abb0t
 2 years ago
Best ResponseYou've already chosen the best response.0like information to osrt of "check"

Tttaammmaannnaa
 2 years ago
Best ResponseYou've already chosen the best response.0okay so i got 1 for carbon and 1.4 for hydrogen

abb0t
 2 years ago
Best ResponseYou've already chosen the best response.0ok, round to the closest whole number ratio and that's your empirical formula

Tttaammmaannnaa
 2 years ago
Best ResponseYou've already chosen the best response.0okay so what about the molecular formula? and so the empirical formula would be just 1 and 1?

abb0t
 2 years ago
Best ResponseYou've already chosen the best response.0Find the total mass of your empirical formula and divide that total by your molecular mass found out.

abb0t
 2 years ago
Best ResponseYou've already chosen the best response.0You should have: \[\frac{ 546.9g }{ 13.018g }\]

Tttaammmaannnaa
 2 years ago
Best ResponseYou've already chosen the best response.0how did you get 13.018?

abb0t
 2 years ago
Best ResponseYou've already chosen the best response.0Well, your empirial formula give is CH. The total mass of C + H = 13.018 g/ mol

Tttaammmaannnaa
 2 years ago
Best ResponseYou've already chosen the best response.0okay so the answer to 546.9g/13.018g is 42.01.

abb0t
 2 years ago
Best ResponseYou've already chosen the best response.0Yep, now multiply that number by your empirical formula to get your molecular formula.

Tttaammmaannnaa
 2 years ago
Best ResponseYou've already chosen the best response.0so multiply 42.01 with 1 or 2?

Tttaammmaannnaa
 2 years ago
Best ResponseYou've already chosen the best response.0what is the empirical formula though? 1 or 2?

Tttaammmaannnaa
 2 years ago
Best ResponseYou've already chosen the best response.0so its just 42.01..

abb0t
 2 years ago
Best ResponseYou've already chosen the best response.0Use whole numbers. So 42.
Ask your own question
Ask a QuestionFind more explanations on OpenStudy
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
 Engagement 19 Mad Hatter
 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.