What is the molar heat of combustion for ethanol?
Round using significant digits.
kJ/mol

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom