View Full Version : Mole mass of a pea?
brittykitty
Oct 20, 2008, 01:01 PM
If you have a mole of peas and each pea has a mass of 1.4g, what mass of peas do you have ?
Just wondering, did my teacher make a mistake on this question? Because he doesn't state how many peas I'm solving for.. it seems like the important part of the question is missing. Any thoughts?
Curlyben
Oct 20, 2008, 01:14 PM
Hint: How many atoms in a mole ?
That's a HUGE amount of peas ;)
brittykitty
Oct 20, 2008, 02:13 PM
6.02 x 10^23.. do I times that by 1.4? Lol
8428? Damn that is a lot. Lol
hopfully that's right haha
Curlyben
Oct 20, 2008, 02:16 PM
Right idea, but...
brittykitty
Oct 20, 2008, 02:19 PM
But what? I'm so stuck on this :(
Do I divide it?
Curlyben
Oct 20, 2008, 02:20 PM
WAY too small ;)
Also no units.
brittykitty
Oct 20, 2008, 02:28 PM
Aw I'm so confused :(
What's the forumla for it?
Curlyben
Oct 20, 2008, 02:33 PM
Post #3 is basically correct, but the answer you posted is miles to SMALL and lacks units.
brittykitty
Oct 20, 2008, 02:37 PM
how to do I make it larger if its to small?
lol I'm not to smart when it comes to any of this.. =\ but thank you
Curlyben
Oct 20, 2008, 02:40 PM
Look again at what you posted:
6.02 x 10^23.. do I times that by 1.4?
The answer is YES, but your answer of
8428? Damn that is a lot. is too small.
Then just add units.
brittykitty
Oct 20, 2008, 02:42 PM
OoOoo :D kk I get it! Thank youu so much :):)
Curlyben
Oct 20, 2008, 02:43 PM
So what answer do you get ?
brittykitty
Oct 20, 2008, 03:14 PM
Mmm I got 8.428 g/mol?? :O
Unknown008
Oct 21, 2008, 05:12 AM
Hum... you know how to use your calculator properly? I got the answer... but that isn't like yours... You sure you didn't miss something?:)
Just in case you didn't know:
10^5 = 100,000
10^23 = 100,000,000,000,000,000,000,000
Meaning if 2 times 10^23, it will be 20^23, or 2.0 x 10^23 in standard form.
Now, if you take 2.0 x 10^23 times 2, it will give 4.0 x 10^23, not 4.
Check all the numbers displayed on your calculator please.:)
brittykitty
Oct 22, 2008, 08:41 AM
Ill check it again whenI get home from work :)