CHEMICAL OR PHYSICAL CHANGE
T/F: An example of a chemical change is when water freezes.
FALSE
How many sig figs?
90027.00
7 sig figs
23.4 x 14 =
330 or 3.3 x 10^2
micro
10^-6
T/F: When platinum is heated, then cooled to its original state, we say this is a physical change.
TRUE
How many sig figs?
670
7.895 + 3.4 =
11.3
milli
10^-3
Silver Tarnishing
Chemical Change
How many sig figs?
2653008.0
8
7.895 / 34 =
0.23
kilo
10^3
A sugar cube dissolves
Physical Change
Round following number to three sig figs:
120000
1.20 x 10^5
27.68 - 14.369
13.31
Convert 76.3mL to L
0.0763 L
Heat changes water to steam
Physical Change
Round the following number to two sig figs:
43.659
44
[(11.34 - 9.63) / 11.34] x 100.00
15.1
0.0549 L