Expire Worthless is when options enter expiration out of the money and expire without any remaining value. Expiring worthless is one of the most common terms used in options trading. Options expire worthless whenever they go into expiration out of the money.
A single molecule of water consists of three atoms. H2O is built from a single atom of oxygen that is single-bonded with two atoms of hydrogen.
At room temperature, 22 Celsius, water has a density of 0.9977 g/ml. The water molecule has a molar mass of 18.01528 g/mol. Avogadro's number for a gram-mol is 6.022E23 particles per mol. Hence the six answers: At 4 Celsius: A US tablespoon of water will contain 4.943E23 molecules of water. A metric tablespoon will contain 5.014E23 molecules of water.