Question

what mass of silver(1)nitrate is needed to prepare 100cm3 of silver(1)nitrate solution,concentration 0.2mol/dm3?
the mass of one mole of silver nitrate is 170g

please help me with this question

Answer 1

so, how many moles of AgNO3 are needed?

multiply that by 170 g/mol

Answer 2

find the moles of silver nitrate by multiplying conc and vol of same units
then find mass from "moles = mass in grams (divided by) relative molecular mass "