QUICK PLEASE List as many PROPER and IMPROPER lab procedures as you can in this picture.

Proper: Lab coat, protection, gloves, tied shoes, pants that cover the whole legs

Improper: The clothing does not cover his whole arms, experiments that are hazardous must be done using a fume hood, labratorical mask  (see the fumes?), flasks being put on the corner of the table (risky for tipping over)

the maximum mass of nh3 is nh3 in grams

intermolecular forces are the forces between molecules or particles.

there are two kinds of van der waals forces: weak london dispersion forces and stronger dipole-dipole forces.

in molecule of water there are dipole-dipole forces between negatively charged oxygen from one molecule of water and positively charger hydrogen of another molecule of water.

hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (h), covalently bound to a highly electronegative atom such as flourine (f), oxygen (o) and nitrogen (n) atoms.