How many grams of ammonia (NH3) are needed to make 8.94*10^24 water molecules? 4 NH3 + 7 O2 -> 6 H20 + 4 NO2 Please also make a roadmap of unit to unit for the following problem.

Find the mass in grams of 1.37x1020 particles of h3po4

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?