What is the average mass of an atom whose relative atomic mass is 39?

What is the ph of a solution with a 1.50 × 10−9 m hydroxide ion concentration?

Describing intermolecular forces use the drop down menus to match the type of intermolecular force to its name dipole dipole interactions dipole induced dipole interactions london dispersion forces hydrogen bond van der waals forces done

Ahydrogen atom has 1 electron. how many bonds can hydrogen form? a) 1 b) 2 c) 3 d) 4 e) 5