5. Calcula el número de protones, neutrones y electrones que tienen los siguientes átomos:
 O ( Z=8, A=16)
 Cl ( Z= 17 , A= 37 )
 Al ( Z= 13 , A= 27 )
 Na (Z=11, A=23)

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?

Which of the following is true about a carbonated soft drink? . the carbon dioxide is the solvent, and water is the solute.. the water is the solution, and carbon dioxide is the solvent.. the carbon dioxide is the solution, and the water is the solvent.. the water is the solvent, and the carbon dioxide is the solute.. .

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?