Rita divides avogadro’s number (approximately 6.02214 x 10^23) by 2.055 to calculate the number of atoms in a sample. which expression gives her result to the correct number of significant figures?

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