Posted by **John** on Saturday, January 19, 2013 at 2:35pm.

I have a question about how to plug in numbers on my calculator (TI-30XIIS) to get an answer. How would I put in my calculator...

ln 1.00X 10-2 mol/L /1.65 X 10-2 mol/L

to get-0.501? I keep getting the wrong answer...

- Chemistry/Calculus -
**DrBob222**, Saturday, January 19, 2013 at 3:05pm
I don't know how the Ti-30 looks but I suspect you're having trouble with the exponents. So don't use them until you learn how. In the meantime you can do this.

Punch in .01 and divide by .0165 (in the usual manner) then hit the ln key. That will give you -0.50078.

- Chemistry/Calculus -
**John**, Saturday, January 19, 2013 at 3:49pm
Thank you, sir. However, I stillmust be doing something wrong because I am not getting the answer. My calculator will give me an error if I do it that way. On my TI-30 I punch in 2nd button, the hit Ln, then (1.00 X 10-2 / 1.65 X 10-2) and get 1.83...

- Chemistry/Calculus -
**DrBob222**, Saturday, January 19, 2013 at 6:14pm
I think you need to reverse that procedure. Punch in the numbers FIRST to get 0.606, then to the ln bit.

## Answer this Question

## Related Questions

- Math Calculator Question - How would I plug the following formula in a TI-30X ...
- algebra I - for my homework I have to graph 4 equations: 1. y=1/4x^2+3x-3 2. y=-...
- Mathematics concepts - Matthew sits at his desk unable to figure out the answer ...
- math concepts - Matthew sits at his desk unable to figure out the answer to a ...
- math - Determine the exact value of cos^-1 (pi/2). Give a number and an ...
- Chemistry - Given 2.05 mol Hg find mass Hg 2.05 mol Hg x 200.59g Hg / 1 mol Hg =...
- chemistry - I need help calculating [H3O] from pH and the pOH scale using my ...
- Calculator help - i have a ti 83, and i want to plug this equation r=1+cos(theta...
- Calculator Help - Is there a difference between TI-89 Titanium calculator and ...
- chemistry help - this isnt exactly a chemistry question, but i am doing ...