What's the ph of 0.0000067 m hcl solution

What is avogadro’s number, and why is it useful

When a scientific theory has been tested and proved by the scientific community, it becomes a law

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