Calculator I HAVE A TEXAS INSTRUMENTS CAL. (TI-30X)AND I CAN'T FIGURE OUT HOW TO USE THE 10 TO WHATEVER POWER. EX :SAY I'AM USING FOR CHEMISTRY.( LIKE THE MOLE EQUATION 6.02 TIMES 10 TO THE 23). I CAN'T FIGURE OUT WHAT BUTTONS TO PUSH FOR THIS EQUATION. COULD YOU HELP ME

Question edited for clarity.
Question moved to model category.

https://www.google.com/search?q=program+a+ti-30x

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You will find the description of all potential errors in the manual.

You don't. The 30X IIs runs on both solar power and a 2025 lithium battery. If you need to replace the 2025 battery, see this.

[H+]=10^(-8.19). The - sign is the change sign key. The result is 1.2589x10^(-9)

1*10^(-3)

Because you're using -3 as an exponent, you need to put the whole thing in the parentheses.

The +/- key on the ti-30x is to let the calculator know whether the number you are using is positive or negative. EX: 4 3 2 1 = positive -4 -3 -2 -1 = negative

You must enter 100+10%100 or 100+10%(100). This will give you the correct answer of 110.

Hello,
Here is the link to the manual.
Hope it helps.

Hello,
Entering the keys and number as you write it can be done with enough parenthees to make sure calculator does what we intend it to.
But I would rather use the commutativity propertie of multiplications to same me some extra ().

Step 1
4 [(+/- change sign)][2nd][10 to the x] [ X ]6.1923 [=]
Step2
[x^2][=]
I first calculate the product 6.1928 x 10^-4 then take the square of the result. Because you can never be sure that the calculator takes 6.1923 to power 2 then multiply or multiply 6.1928 x 10^-4 and raise to power 2.
You can force the calculator with an opening parenthesis and a closing one but if you omit the ) and get an error, it may be hard to detect.

Hope it helps.

This is a not a calculator problem, it's a physics problem. You need the formula: E = hf, where f is the frequency and h is "Planck's constant" (6.626068 x 10^-34 m^2kg/sec).

On your calculator, punch in 3.0 [EE] 12 [x] 6.63 [EE] -34 to get the answer.