What mass of silver nitrate (AgNO3) is re-

Question

quired to prepare 400 g of a 3.50% solution of
AgNO3?
1. 14 g
2. 0.00875 g
3. 114.28 g
4. 1400 g

Answer 1

percent what? w/w; w/v, v/v, etc.
I assume this is mass percent.
(g AgNO3/400 g soln)*100 = 3.50
Solve for g AgNO3.

Answer 2

Can you help me