One saline solution contains .75 g NaCl in exactly 100 mL of solution. What is the molarity of the solution?

Question

One saline solution contains .75 g NaCl in exactly 100 mL of solution.  What is the molarity of the solution?

joannablackwelder · Answer

Molarity is a unit of moles per Liter.

joannablackwelder · Answer

Do you know how to put .75g NaCl in moles?

joannablackwelder · Answer

@fashionlove?

shoba · Answer

Molarity= mol/L 

Na=23g and Cl=35g Weight compound =58 g 

.75g NaCl x (1mol/58g) = 0.012931 mol NaCl 

Convert 100ml to L . 
* 100ml x (1L/1000mL) =.1L 



Calculating molarity-= .012931mol/.1L = 0.12931 mol/L 

so, .75g NaCl in 100mL solution has 0.12931 mol/L or 0.13 considering significant figure :)