3. Calculate. Make the following conversions. Expre your ans ners in scientific notation.
a. 14.8 g == ?pg
d. 7.5 X 104 J = ? kJ
b. 3.72 g = ? kg e. 3.9 X 10 mg = ? dg
C. 66.3 L = ? cm
f. 2.1 x 10-4 dL = ? uL

21 just playing hshsjsjshsgdhdhdhhd

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

C. chemical changeshope i : )