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.
Students tended to be young (an average age of 18.7 at the time of college entry) and to have graduated within five years, with Asian Americans and whites more likely to be the traditional age than other minority groups. Most graduates also came from upper or middle-class family backgrounds, and 58 percent were women.