Obviously the more product you have and the closer the impurities are, the more silica gel you will need. 1  A good rule of thumb is: 2  for difficult separations (Î´CV â¤ 1) use up to 100 g (~200 mL) of silica gel per gram of compound to be purified (1% load)
Median age at first marriage for American Indian and Alaska Native men and women age 15 to 54, respectively, in 2010. For the population as a whole in this age range, the respective numbers were 28.7 and 26.7 years. The difference in the median age at first marriage between American Indian and Alaska Native women and women overall is not statistically significant.
For Americans ages 15-44, about 58.1% were raised by two biological or adoptive parents, and 41.9% were not. The average age of virginity loss in a household with two parents is 17.6 years old. The average age of virginity loss in a household without two parents is 16 years old. This means Americans tend to lose their virginity a year-and-a-half earlier if they do not live with two parents.