Plz !

calculate the molality of a solution containing 200. g of nacl dissolved in 750. g of water. the molar mass of nacl is 58.44 g/mol.

a. 0.0046 m

b. 2.56 m

c. 4.56 m

d. 16.7 m

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these

The biomedical technique in which a part of the brain is destroyed with electric current is known as a. electroconvulsive therapy b. prefrontal lobotomy c. bilateral cingulotomy d. tardive dyskinesia

Ablock of aluminum is dropped into a graduated cylinder with an initial volume of water at 75ml and the volumes rises to 90ml. if the block has a mass of 40.5 g what is its density ?