If ine mole of pennies were divided amung 250 million peoplein
the us, how many dollars would each person recieve?

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

Which fact represents evidence for the big bang theory?

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