Which of the following chemical reactions are an example of a combustion reaction? Select all that apply.
O Gasoline powering a vehicle
( A solid forms when two solutions are mixed
O Water breaking down
Gunpowder firing a bullet from a gun

Conservation efforts have been effective in "increasing the number of endangered species, reducing all the negative impacts of human activity, and preserving wildlife habitats".hope my answer has you : ) 

The answer is c - the principal of original lateral continuity. 

Pcl5 + 4 h2o = h3po4 + 5 hclthe ratio is 1: 5 for  pcl  and hcl, 1 mole of pcl produces 5 moles of hclmolecular weight of pcl5 is: 31 + (5 x 35.5) = 208.5above we have 75.5 / 208.5 = 0.36 moles so this will produce0.36 x 5 = 1.81 moles of hcl.

Well what are the choices?