At –183° C, which of the following gases exists as a pale, bluish liquid that is slightly heavier than water?
a. Air c. Nitrous oxide
b. Oxygen d. Carbon dioxide
ANS: B
Oxygen is an elemental gas that is colorless, odorless, and tasteless at normal temperatures and pressures. It makes up 20.9% of the Earth's atmosphere by volume and 23.2% by weight. It con-stitutes approximately 50% of the Earth's crust by weight. Oxygen is slightly heavier than air, having a density of 1.326kg/m3 at 21.1° C and 760 mm Hg (specific gravity = 1.105). At temper-atures less than –183° C (–300° F), oxygen exists as a pale, bluish liquid that is slightly heavier than water.
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Fill in the blank(s) with correct word
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What will be an ideal response?