What is heat change in kJ when 50.0 grams of liquid diethyl ether (C2H5OC2H5) is vaporized to gas at its boiling point of 11.85oC. Diethyl ether has a heat of vaporization of 27.5 kJ/mol.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

In which reaction is precipitation occurring?