1) Calculate the mass of magnesium oxide formed if 2.40 grams of Mg reacts with 10.00 grams of O2
2Mg + O2 -> 2Mgo

Achemistry student weighs out of phosphoric acid , a triprotic acid, into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution. calculate the volume of solution the student will need to add to reach the final equivalence point. round your answer to significant digits.

In 2002, the rare earth elements mine in mountain pass, california was closed because

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space