Would anybody like to help me get plus plzzz i gotta do all this make up work thanks :)

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

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