20 points
pcl5 + h2o → h3po4 + hcl

what coefficients will balance the equation?

1, 4, 1, 5
1, 5, 1, 1
2, 5, 1, 2
2, 4, 2, 5

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy

What is the equation fort the alkaline zinc/manganese dioxide cell. a) anode b)cathode c)overall equations.

At which temperature would a reaction with ah= -220 kj/mol and as=-0.05 kj/(mol-k) be spontaneous?