× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
New Topic  
micphy micphy
wrote...
Posts: 95
Rep: 2 0
11 years ago
Pectinose, a simple sugar, has an empirical formula of CH2O and a molar mass of 150 g/mol. What is its molecular formula?

How do I solve this?
Read 782 times
2 Replies

Related Topics

Replies
wrote...
#1
11 years ago
First find out the weight of the empirical unit. CH2O weighs 30g/mol.
An empirical formula is the most simplified representation of a molecule. So if you divide the molecular weight by the empirical formula weight, you will get the number of empirical units. i.e. 5. The molecular formula will be C5H10O5
wrote...
#2
11 years ago
The Molecular formula is just the empirical formula multiplied by a constant.  To solve this question we need to Find Molar Mass of the Empirical Formula.

Molecular Mass of CH20 = 30g/mol

150g/mol / 30g/mol = 5

So lets multiply the Empirical Formula by 5

5(CH2O) = C5H10O5

The answer if C5H10O5
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1251 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 140
  
 289
  
 269
Your Opinion
Which industry do you think artificial intelligence (AI) will impact the most?
Votes: 352
Previous poll results: Which industry do you think artificial intelligence (AI) will impact the most?