Plz i will give u brainlest plz which waste is produced by a fuel cell? a. gasoline vapors b. water c. hydrogen d. catalyst

What is the ph of a solution with a 1.50 × 10−9 m hydroxide ion concentration?

Determine the reaction and balance the following equations urgent due in the morning

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