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CHEMICAL OR PHYSICAL CHANGE
SIG FIGS
SIG FIG - calculations
Metric System
100

T/F: An example of a chemical change is when water freezes. 

FALSE

100

How many sig figs? 

90027.00

7 sig figs 

100

23.4   x   14 =

330 or 3.3 x 10^2

100

micro

10^-6

200

T/F: When platinum is heated, then cooled to its original state, we say this is a physical change. 

TRUE

200

How many sig figs? 

670

2
200

7.895   +   3.4 = 

11.3

200

milli

10^-3

300

Silver Tarnishing

Chemical Change 

300

How many sig figs?

 2653008.0

8

300

7.895   /   34 = 

0.23

300

kilo

10^3

400

A sugar cube dissolves 

Physical Change 

400

Round following number to three sig figs:

120000  

1.20 x 10^5

400

27.68  - 14.369

13.31

400

Convert 76.3mL to L

0.0763 L

500

Heat changes water to steam 

Physical Change 

500

Round the following number to two sig figs: 

43.659  

44

500

[(11.34  -  9.63) / 11.34]  x  100.00

15.1

500
Convert 54.9mL to L 

0.0549 L