Chemistry 300 Exam 1

Chapter 1

100

Define chemistry

The study of properties and transformations of matter

200

Convert 93,000,000 to scientific notation

9.3* 10^7

Chapter 2

100

Convert 1.15147 * 10^-5 to decimal notation 

0.000015147

200

What is the symbol and exponent of the SI prefix Multipler, pico? 

p 

10^-12 

300

Dimensional analysis (one-step):

Convert 9563 nm into meters 

• Step 1: Solution map

           nm--m 

              (1m/1* 10^-9)nm

• (1m/ 1* 10^9 nm)
• 
  
• Step 2: Execute
• 
  
• 7345 nm * 1m/ 1* 10^9 nm
• = 7.345 * 10 ^-6 m
• 4 s.f. 7.345 times 10^-6 m

400

Mixed Operations:

(4+207.562+115.75) g/ 1034 mL

PEMDAS (do parentheses first) 

Then, add then up by lining them up 

         4

     207.562

 +  115.75

     372.312

So, you go to the least precise, which is the ones place (because of the 4) then, you note that 327 is 3 significant figures

Then do the whole problem in your calculator and get 0.316549323 (1034 is 4 s.f.) but we choose 3 s.f. from the addition problem because it is the least significance figures we use and get 0.3165 g/mL. 

500

Can you write all the SI Prefix multiples from tera, giga, mega, kilo, deka, centi, milli, micro, nano, pico, and femto?

T 10^12

G 10^9

M 10^6

k 10^3

da 10^1

d  10^-1

c   10^-2

m  10^-3

μ   10^-6

n   10^-9

p 10^-12

f    10^-15