What is the molarity of a solution that contains 72.9 g of MG(NO3)2 per 0.39 L of solution

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.

The point along a planet's orbit where it is closest to the sun is called the