
1  Which of the following statements applies to a mixture? 



Cannot be broken down into simpler substances. 



May be separated by physical means. 



Contain 2 or more elements in fixed mass percents. 



Have different properties from the substances from which they were made. 





2  Which is the shortest length? 



2 cm 



0.002 km 



200 mm 



1m 





3  Convert 673 K to degrees Celsius. 



400 C 



946 C 



27 C 



252 C 





4  The number of significant figures in the number 0.0001 is... 



1 



2 



4 



5 





5  The mathematical operation (625)(0.020) L yields... 



10 L 



13 L 



12.5 L 



12.50 L 





6  The mathematical operation 80.127g  (16.2 x 3.100) g yields... 



30 g 



29.9 g 



29.93 g 



29.927 g 





7  Convert, using the factor label system, 400 mg to kg. 



0.0004 kg 



4 x 10 ^{8} kg 



0.4 kg 



40 kg 





8  Convert, using the factor label system, 20.0 lbs. to grams. (1 kg = 2.2 lbs.) 



9090 g 



44,000 g 



22.7 g 



22,700 g 





9  Calculate the mass of 100 mL of methanol if the density of methanol = 0.80 g/mL. 



75 g 



800 g 



1.25 g 



80 g 





10  Which of the following is NOT a physical property? 



boiling pt. 



color 



flammability 



hardness 




