What is the total number of atoms in 2.51 moles of argon?

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2