Questions 1.
Determine the empirical formula of the oxide of magnesium. (Think carefully about the precision
of each mass that you measured before you do this calculation. How many significant figures are
justified for each mass?)

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?

Why doesn't heat added to water make the tempature rise above 100c

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?