During trial 2, what allowed you to determine that aluminum was the limiting reactant? check all that
apply
•1. all of the copper dissolved.
•2. all of the aluminum dissolved
•3. the solution turned clear.
•4. the number of grams of copper(ll) chloride used in the reaction was greater than the number of
grams of aluminum
•5. the molar ratio of copper(ii) chloride to aluminum was greater than 3.2. the equation's molar ratio

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

a:

by the combination of an unlimited number of elements

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)