# Quiz 1 AU09- answer key - 3(2 SF 48 tons 2000 lb 454 grams...

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CHM-201 Quiz 1 AU09 Page 1 of 1 ANSWER KEY 1a ) Compound 1b) Heterogeneous mixture 1c) Element (although not the most common form of oxygen which is O 2 ) 1d) Compound 2a) F (2SF) 2b) T (different materials formed as products) 2c) T (relative mass of oxygen will scale with sample size since composition is fixed – in this case 2 oxygens to 2 hydrogens) 2d) T (68.3 in x (2.54cm/in) = 173 cm) 2e) F (should be meter)
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Unformatted text preview: 3. (2 SF) 48 tons 2000 lb 454 grams = 4.4x10 7 grams ton lb 4. Mass of bromine (g) is 46.392 grams – 28.892 grams = 17.500 grams (5 SF) Density = mass/volume = 17.500 grams = 3.1 g/mL (2SF) 5.6 mL mass in 10 mL = (10.0 mL) 3.1 grams = 31. grams (2 SF) mL Note both density and mass in 10mL will have 2 SF due to volume measurement and calculated density respectively....
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