At our mother's knee we all learned that a mole of ideal gas at STP occupies a volume of 22.4 liters. Given the opportunity, we can recite that number right after saying
x = −b ± b2 − 4ac2a
or C2 = A2 + B2. How big is a liter? Maybe there ought to be a box in each classroom labeled 22.4 l. It's a project for a rainy afternoon. 22.4 l = 22.4 × 103 cm3. One side of such a cube would equal 322.4 × 10 cm = 28 cm.
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