Classify each property as physical or chemical.

a. the tendency of ethyl alcohol to burn

b. the shine on silver

c. the odor of paint thinner

d. the flammability of propane gas

Solution 45E: Unit conversion (a) millimeter(mm) to nanometer(nm) We know (i) Convert mm to m -3 1.0 mm = 10 m (ii) nm to m 1 nm = 10 m-9 Thus Given unit x Desired un= desired unit 1 x 103 mn u1 nm 6 1 mm x 1 mm x 109 m = 10 nm 6 Thus, 1.0 mm = 1 x 10 nm (b) mg to kg, We know 10 mg = 1 g and 1 mg = 10 g -3 10 g = 1 kg Therefore 1 x103 g 1 kg 1.0 mg x 1.0 mg x 1000g = 1x 10 kg Therefore, 1 mg is equal to 1x 10 kg -6 (c) km to ft Convert the unit by using two or more conversion fectors 1 km = 1000 m 1 m = 100 cm 1 inch = 2.54 cm 1 cm = 1inch/2.54 cm 1 ft = 12 inch Thus 1000 m 100 cm 1 in 1 ft 1 5 1.0 kmx 1k m x 1 m x 2.54 cmx 12 inch 30.48x 10 ft =0.0328 x 10 ft = 3.3 x 10 ft Thus, 1 km is equal to 3.3 x 10 ft 3 d) in. to cm3. We know 1 inch = 2.54 cm (1.0 inch) = (2.54 cm) 3 (1.0 inch) = 16.387 cm 3 3 = 16.4 cm 3 3 Thus, in. is equal to 16.4 cm