Welcome Guest Search | Active Topics |

Tag as favorite
Altius 3 question 53
Options
Previous Topic Next Topic
Lina_5913
#1 Posted : Saturday, August 07, 2021 7:51:42 PM
Rank: Newbie

Groups: Registered
Joined: 6/5/2021
Posts: 6

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
Hello,

I dont seem to understand the explanation to question 53 in the altius 3 exam? how did they determine that molecular weight would be lower?

thank you,
Lina
Back to top
Report?
INSTR_Katrina_128
#2 Posted : Monday, August 09, 2021 4:31:31 PM
Rank: Advanced Member

Groups: Registered
Joined: 5/18/2021
Posts: 73

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
Hi Lina,

I know, it seems really counterintuitive.

I'll use an analogy to explain this:

Consider 100 g of pure gold. You go get it appraised. Ooooh, you're gonna be rich!

Consider 95 g of gold tainted with 5 g of brass. Both look the same (yellow and shiny). You THINK it's still 100% gold. You go get it appraised. HEY. Why isn't it worth as much anymore?

Same idea as the question. 100% pure molecule has a HIGHER molecular weight than wet molecule. The water is "tainting" the molecule (because it is lighter) and bringing the average molecular weight DOWN.

That's the idea behind the answer.
Back to top
Report?
Users browsing this topic
Guest
Tag as favorite
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Clean Slate theme by Jaben Cargman (Tiny Gecko)
Powered by YAF | YAF © 2003-2009, Yet Another Forum.NET
This page was generated in 0.108 seconds.