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.
Total AI/AN population alone or in combination with other races: 5.2 million or 1.7 percent of the US population.(r2) About 32 percent of Natives are under the age of 18, compared to only 24% of the total population who are under the age of 18. The median age for American Indians and Alaska Natives on reservations is 26, compared to 37 for the entire nation.