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.
According to Age and Sex Composition: 2010 [PDF], the median age of Americans is now 37.2, with seven states recording a median age of 40 or older. The brief also shows the male population grew 9.9 percent between 2000 and 2010, while the female population grew 9.5 percent. Of the total 2010 Census population, 157.0 million people were female (50.8 percent) and 151.8 million were male (49.2 percent).