Give 264.2g of (NH4)2SO4, calculate the a) amount of (NH4)2SO4
b) number of ions
c) number of atoms
d) number of H atoms
e) number of N atoms
With workings please! Thanks so much!

Which type of substance ionizes partially and gives off hydrogen ions when dissolved in water? a. strong acid b. strong base c. weak acid d. weak base

Which of these conditions most likely produces an unstable isotope?

What do electromagnetic waves carry? how are they produced through which media can they move? where do they transfer energy? what do they not transfer? what do mechanical waves carry? how are they produced? through which media can they move? where do they transfer energy? what do they not transfer?