1. The density of air is about 1 g/cm3 at room temperature and atmospheric pressure.   True   False   2. The density of carbon dioxide is 1.8 kg/m3. So, the volume occupied by 9.0 kg of carbon dioxide is   5 m3   16.2 m3   0.2 m3   None of these   Hint Half-n-half Clue   3. One kg of air is compressed from 1 m3 to 0.5 m3. Which of the following statements is true?   The mass is halved.   The density is halved.   The mass is doubled.   The density is doubled.   Half-n-half Clue   4. Which of these has the lowest density?   Cork   Aluminum   Glass   Water   Half-n-half Clue   5. Which of the following statements is true?   Oil floats on water because oil is less dense than water.   Water floats on oil because water is more dense than oil.   Oil floats on water because oil is more dense than water.   Water floats on oil because water is less dense than oil.   Half-n-half Clue   6. A metal body of mass 38.8 g occupies a volume of 2 cm3. Identify the metal.   Iron with density = 7.9 g/cm3   Tungsten with density = 19.4 g/cm3   Lead with density = 11.4 g/cm3   Aluminum with density = 2.7 g/cm3   Half-n-half Clue   7. Density is defined as   volume / mass   mass / volume   mass × acceleration   mass × volume   Half-n-half Clue