Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
In 3 moles of ethane calculate the following.
(a) no of moles of C atom.
(b) no of moles of H atom.
(c) no. of molecules of ethane.
 one year ago
 one year ago
In 3 moles of ethane calculate the following. (a) no of moles of C atom. (b) no of moles of H atom. (c) no. of molecules of ethane.
 one year ago
 one year ago

This Question is Closed

hanahBest ResponseYou've already chosen the best response.2
Answer (i) 1 mole of C2H6 contains 2 moles of carbon atoms. Number of moles of carbon atoms in 3 moles of C2H6 = 2 × 3 = 6 (ii) 1 mole of C2H6 contains 6 moles of hydrogen atoms. Number of moles of carbon atoms in 3 moles of C2H6 = 3 × 6 = 18 (iii) 1 mole of C2H6 contains 6.023 × 10^23 molecules of ethane. Number of molecules in 3 moles of C2H6 = 3 × 6.023 × 10^23 = 18.069 × 10^23
 one year ago

ashnaBest ResponseYou've already chosen the best response.1
have you copy pasted it @hanah ?
 one year ago

hanahBest ResponseYou've already chosen the best response.2
u have to find mole not atom
 one year ago

ashnaBest ResponseYou've already chosen the best response.1
i know that .. i want for atoms too !
 one year ago

ashnaBest ResponseYou've already chosen the best response.1
http://freeonlinehelpns.blogspot.in/2012/06/inthreemolesofethanec2h6calculate.html
 one year ago

ashnaBest ResponseYou've already chosen the best response.1
i had already checked the link .. only then did i come to open study
 one year ago

ashnaBest ResponseYou've already chosen the best response.1
i didn't understand that .. so can you explain ?
 one year ago

hanahBest ResponseYou've already chosen the best response.2
its just as simple just multiply 3 as given in your question with the number of mole present in the formula of ethane
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
She is right.. But it seems you are not satisfied or you did not get that ?? Right??
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
See I give you another example so that you get some understanding: See; Let suppose we have Water (already you have too) \(H_2O\) Now tell me how many H and O are there ??
 one year ago

ashnaBest ResponseYou've already chosen the best response.1
does that mean whenever the qn is find the moles i should multiply the given atoms with the number of moles present ? EVERY TIME ?
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Wait go slow... I explain you everything.. Just tell me what I asked..
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
If you look Atom wise: Then there are two atoms of H and one atom of O Right ??
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
So: For two H. there are 2 mole of H atom For one H there are 1 mole of H atom This is according to the atoms present in \(H_2O\).. Getting ??
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Okay now moving forward: This is for single \(H_2O\) What if I said : for \(2 H_2O\)
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Yes.. So 4 moles of H and 2 moles of O..
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Similarly in your question: you can just understand your question as : \(3(C_2H_4)\) How many C and H are there ??
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Sorry for \(C_2H_6\)..
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Yes now you are right.
 one year ago

ashnaBest ResponseYou've already chosen the best response.1
is it just C2H6 OR 3(C2H6)
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Ethane is just : \(C_2H_6\)
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
But you are given 3 moles of it : 3 Moles of \(C_2H_6\)
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
So you can write it as : \(C_2H_6 + C_2H_6 + C_2H_6 = 3 C_2H_6\)
 one year ago

ashnaBest ResponseYou've already chosen the best response.1
oh okay .. understood .. so any qn like this ..i shud follow the same steps right ?
 one year ago

ashnaBest ResponseYou've already chosen the best response.1
@hanah and @waterineyes thanks :)
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Yes.. For calculating atoms in the molecule we follow the same steps..
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Understood ?? c part you can do or not ??
 one year ago

ashnaBest ResponseYou've already chosen the best response.1
can you see that in nana3456 you are still typing something ?
 one year ago

ashnaBest ResponseYou've already chosen the best response.1
or is it just my comp wch makes me see like that ?
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
I am wondering by seeing that..
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
See this site stopped working for me when I was typing that reply.. Ha ha ha.
 one year ago

ashnaBest ResponseYou've already chosen the best response.1
:P .. from the morning you are typing something and i were wondering why you wern't entering it :P
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
At that time I was replying to Nana and this site did not work properly for me then.. Sorry I could not reply to you..
 one year ago
See more questions >>>
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.