How many ammonium Ions NH4^+1 are there in 1.73 mol(NH4)2S? i'm a chemistry test so i need help soon( and btw the 4 and 1 in NH4^+1 are both small numbers and also the 4 and 2 in (NH4)2S) are also small numbers, sorry i forgot what they are called.)

How would you reduce the volume of gas

How many molecules are found in 1.32 mol of nacl?

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?