Given that log n = -a, derive an expression for n the antilogarithm in scientific location.

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?