i am taking gen chem in college and i need help bc i know very very little about chem but it is a required nursing course... can anyone tell me how to do Moles in a scientific calculator (bc i dont want to have to work the whole problem out on paper, bc on a test we only have an hour to do several questions). I have a TI 83 i would really appreciate if someone would help me. i have signed up for tutoring but that doesnt start until next week.
2007-01-15 05:19:51 · 4 answers · asked by Lex 2 in Science & Mathematics ➔ Chemistry
Well, assuming you understand the definition of a mole to be 6.022 x 10^23 units, what you do is:
Say you want to know how many cupcakes are in 2.54 moles of cupcakes.
2.54 mol cupcakes x (6.022 x 10^23 cupcakes / 1 mol cupcakes) =
Punch in 2.54.
Multiply by:
Punch in 6.022.
Press the yellow 2nd button.
Press the E or EE button (it should be the same button that has the comma).
Two little zeroes should appear on your screen.
Press 23.
Hit equals.
You should get 1.52.... ^24. On paper, you would write that as
1.52 x 10^24. That's a lot of cupcakes!
Again, I'm assuming you understand the concept of scientific notation and just need help working your calculator (I did too!). The important thing to remember that always screwed me up is that the E or EE button represents "x 10 to the". So, don't actually punch in "x 10". That is accounted for by the EE button.
Edited to add: I haven't used that model of calculator (I have the TI-30XA) but if as the next poster mentions it doesn't work on that calculator, go out and buy an easier model (mine is pretty decent!). Trust me, you don't want to go through chem without a reliable calculator, and there's no way you can do all those conversions in gen chem by hand. No time, and it's too easy to make mistakes that way.
2007-01-15 05:27:21 · answer #1 · answered by birdbrained22 2 · 0⤊ 0⤋
Bad news: you're going to have to work it out on paper. There's probably a way to do it using the old Ti 83, but it would take less time to actually learn moles and molar mass than to attempt programming all that into your calculator.
2007-01-15 05:28:10 · answer #2 · answered by wheresdean 4 · 0⤊ 0⤋
Moles is a unit of measurement, not a magical calculator function.
A mole of an element is the weight of a standard number of atoms (Avagadro's Number, 6.02 x 10 ^ 23).
And by the way, you're never going to make it with your attitude. You're going to "have to work the whole problem out on paper", and trying to calculator your way out of it isn't going to happen. This is college chemistry, not freshman high school algebra. These problems are going to grow exponentially more complex and you're going to need to have them written out clearly step-by-step so that you can find possible errors and use good problem solving skills.
You'd best get used to working hard and stop trying to take shortcuts. Are you going to take the easy way out when someone's life is on the line? Health professional fields aren't for half-assing.
2007-01-15 05:34:14 · answer #3 · answered by christophermalachite 3 · 0⤊ 0⤋
I think you need to take general chemistry to learn the basics especially if you have no chemistry background. You won't understand what is going on. Trust me I tired to skip Chem 1 (general chem) and go straight to chem 2 (bio/organic chem) and had no clue what was going on, it was like foreign language!
2016-03-28 22:50:58 · answer #4 · answered by ? 4 · 0⤊ 0⤋