smog - air pollution by a mixture of smoke and fog smogginess portmanteau, portmanteau word, blend - a new word formed by joining two others and combining their meanings; `smog' is a blend of `smoke' and `fog'; `motel' is a portmanteau word made by combining `motor' and `hotel'; `brunch' is a well-known portmanteau
Ammonia or azane is a compound of nitrogen and hydrogen with the formula NH 3. It is a colourless gas with a characteristic pungent smell. Ammonia contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to food and fertilizers.
We also can use dimensional analysis for solving problems. (6) How many atoms of hydrogen can be found in 45 g of ammonia, NH 3? We will need three unit factors to do this calculation, derived from the following information: 1 mole of NH3 has a mass of 17 grams. 1 mole of NH3 contains 6.02 x 1023 molecules of NH3. 1 molecule of NH3 has 3 atoms of hydrogen in it.