A student places 2.5 grams of salt in 90 ml. of water. She then transfers 30 ml. of that solution to an evaporating dish. How many grams of salt are in the 30 ml. of solution?

• 0.81 gm.
  
  In solution of 90+2.5=92.5 ml. or gm. , salt=2.5 gm.
  So in solution of 30 ml., salt= 30*2.5 /92.5=0.81 gm.
• 9 years agoHelpfull: Yes(0) No(0)