Just a reminder that everything you do related to lab should be entered directly into your lab notebook.
Calculator Lab
Objectives:
After completing this lab, you should be able to
-
Use your calculator for arithmetic calculations involving the EE, LOG, LN and yx keys
Express answers to calculations involving measured quantities to the correct number of
significant figures
Algebraically solve for any variable in a mathematical equation
Resources:
Lab Text – Chapter XII
Safety:
There are no particular safety issues associated with this lab.
Part I:
Use your calculator to solve the following problems. Don’t worry about significant figures for now.
1)
(6.626 x 10-34)(1.00 x 1014) = 6.63 x 10-20
6.02 x 1023
2)
3)
-19
= 3.76 x 1042
1.602 x 10
(6.02 x 1023) (3.00 x 108)
(9.6485 x 104) / (1.602 x 10-19)
= 3.00 x 108
4)
1.673 x 10-27
-11
= 5.01 x 10-9
6.67 x 10
5)
(5.3 - 5.0)2 + (4.9 - 5.0)2
= 0.2
5- 1
6) - log 10-4 = 4
7) e -0.25 = 0.78
8)
(7+3+5)/(8-5-7)
(16+7-2)(9+4-6)
9)
(23+41-12)(34+17-13)
(16+7-2)/(9+4-6)
10)
= -3 x 10-2
= 658
1.6726 x 10-24 + 9.108 x 10-28
+ 1.6749 x 10-24 = 3.348 x 10-24
11) (4/3) () (5.876)3 = 849.8
Assuming that all of the numbers in the above equations represent measured quantities, express your
answers to the correct number of significant figures, using standard scientific notation where
appropriate.
Part II:
With only one equation, there can be only one unknown. Solve for the indicated variable:
11) PV = nRT
solve for n
n = PV/RT
m
v
solve for v
12)
d=
13)
o
14)
KE = ½ mv2
solve for v
15)
pH = -log [H+]
solve for [H+]
16)
G = -RT ln K
solve for K
17)
V = 4/3  r3
18)
1
 = RH
C = 5/9 (oF – 32)
ni2
o
solve for oF
-
F = 9/5 oC + 32
v = (2 KE / m)1/2
[H+] = 10-pH
K = e G/-RT
r = (3/4 V / )1/3
solve for r
1
v = m/d
1
nf2
solve for nf
- Ea
19)
k=Ae
RT
solve for T
20) Finally, the dreaded quadratic equation!
x2 + 6x – 3 = 0 solve for the numerical values of x
Assessment:
Remember to turn in your work before leaving lab.
Completed assignment – 100 pts.