Answer:
160 gm
Explanation:
Five times as much water means you can dissolve 5 times as much potassium nitrate   5 x 32 = 160 gm  <===== this seems unlikely though as I doubt 32 g  of  potassium nitrate will dissolve in only  1 cm^3 of water 1 cm^3 of water is only 1 gm of water