All of the top 10 causes of death in developing countries are preventable or treatable (early twentieth century). Globally, water-borne diseases are the leading cause of death in children below five years, only to be outranked by the childhood mortality rates from acute respiratory infections rank first. Around the world, water supply and satisfaction facilities are rapidly deteriorating and currently are operating at a fraction of their installed capacity.

A. 1st
B. 2nd
C. 4th
5. 3rd

Explain the relationship between forward and backward reactions in equilibrium, and predict how changing the amount of a reactant (creating a tension) will affect that relationship.

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

How many liters of 3.0 m naoh solution will react with 0.60 liters of 4.0 m h2so4? h2so4 + naoh → na2so4 + h2o 1.2 l 1.6 l 2.4 l 2.8 l