Quick Answer. The average human head weighs 10 to 11 pounds. That is about 8 percent of the weight of a human body. The average adult human brain only weighs about 3 pounds, so most of the weight in the head consists of the skull and other fluids. Continue Reading.
Futoshiki: 1  is also known under the name Unequal. 2  is a puzzle playable on a square board having fixed dimensions (5x5 for example). 3  each board square must ultimately contain a digit from 1 up to the board dimension. 4  on each row or column, each digit must appear exactly once.
Zaitsev's rule (or Saytseff's rule, Saytzev rule) is an empirical rule for predicting the favored alkene product(s) in elimination reactions. While at the University of Kazan, Russian chemist Alexander Zaitsev studied a variety of different elimination reactions and observed a general trend in the resulting alkenes.or example, when 2-iodobutane is treated with alcoholic KOH, 2-butene is the major product and 1-butene is the minor product. More generally, Zaitsev's rule predicts that in an elimination reaction, the most stable alkene â typically the most substituted one â will be the favored product.