The Pecos Pueblo developed as a trading center over time. What evidence in the text supports the idea that this took a long time?

Because of its value as trading center, the Pecos Pueblo grew in size."

One of the last places the trail passed through was the Pecos Pueblo.

The site was just right for the trade.

Today, the trail attracts tourist instead of traiders.

Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?